CN114804198A - Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst - Google Patents
Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst Download PDFInfo
- Publication number
- CN114804198A CN114804198A CN202210204165.5A CN202210204165A CN114804198A CN 114804198 A CN114804198 A CN 114804198A CN 202210204165 A CN202210204165 A CN 202210204165A CN 114804198 A CN114804198 A CN 114804198A
- Authority
- CN
- China
- Prior art keywords
- titanium dioxide
- yellow
- nano titanium
- type nano
- type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 28
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims abstract description 5
- 230000004298 light response Effects 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 29
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 26
- 229910000349 titanium oxysulfate Inorganic materials 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 17
- 239000002244 precipitate Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 12
- 238000010335 hydrothermal treatment Methods 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 5
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 claims description 5
- 229910000348 titanium sulfate Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 52
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 36
- 239000004408 titanium dioxide Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 12
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 12
- 229940043267 rhodamine b Drugs 0.000 description 12
- 238000000967 suction filtration Methods 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 238000012512 characterization method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 239000012065 filter cake Substances 0.000 description 6
- 238000003760 magnetic stirring Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 238000007146 photocatalysis Methods 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001782 photodegradation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000000696 nitrogen adsorption--desorption isotherm Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010532 solid phase synthesis reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/08—Nanoparticles or nanotubes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Toxicology (AREA)
- Hydrology & Water Resources (AREA)
- Health & Medical Sciences (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Catalysts (AREA)
Abstract
The application relates to yellow P25 type nano titanium dioxide which is prepared by a low-temperature hydrothermal method, has the average particle size of less than or equal to 10 nanometers and the specific surface area of 179-216m 2 ·g ‑1 The yellow P25 type nano titanium dioxide has visible light response, and the crystal form distribution of the yellow P25 type nano titanium dioxide is that the weight ratio of anatase type/rutile type is 70:30-80: 20. The application also relates to a preparation method of the yellow P25 type nano titanium dioxide and application of the yellow P25 type nano titanium dioxide as a photocatalyst. The yellow P25 type nano titanium dioxide has simple preparation process and cheap raw materialsEasy to obtain, suitable for mass production and has excellent photocatalytic activity.
Description
Technical Field
The application relates to the technical field of nano materials and photocatalysis, in particular to a preparation method of yellow P25 type nano titanium dioxide, yellow P25 type nano titanium dioxide and application of the yellow P25 type nano titanium dioxide as a photocatalyst.
Background
The photocatalysis method is one of the most effective methods for treating dye wastewater, and the development and development of photocatalysis materials are key technologies for realizing the industrial application of the photocatalysis method for treating dye wastewater. Due to titanium dioxide (TiO) 2 ) Has the advantages of stability, low price, no toxicity, excellent photocatalytic performance and the like, and is considered to be the photocatalytic material with the most application prospect.
The titanium dioxide has three crystal structures of anatase, rutile and brookite. The anatase type and the rutile type are mixed together according to a certain proportion, so that the photocatalytic performance of the titanium dioxide can be obviously improved. Commercial P25 is a widely used mixed-phase titanium dioxide photocatalytic material having high photocatalytic performance, in which the anatase phase titanium dioxide content is 70-80% and the rutile phase titanium dioxide content is 20-30%.
There are three main methods for preparing P25.
(1) Gas phase method: commercial P25 (degussa) was prepared by a gas phase process using TiCl 4 P25 was obtained by flame combustion of titanium tetrachloride hydrogen as the starting material, with a ratio of anatase to rutile of about 80:20, specific surface area of sample 50. + -.15 m 2 In which the particle size of the rutile and anatase titanium dioxide is about 25 nm. TiCl starting material for gas phase processes 4 High price, extremely strong volatility and corrosiveness, and the reaction needs to be carried out at high temperature>1000 ℃), has higher requirements on the high temperature resistance and the corrosion resistance of equipment, and the reaction cost is difficult to control; the P25 sample prepared by the method has small specific surface area and contains partial amorphous titanium dioxide, thereby influencing the photocatalytic efficiency. The scaling problem of vapor phase titanium dioxide in the cooling tubes also limits the large scale deployment and use of the process.
(2) Sol-gel method: with TiCl 4 Hydrochloric acid, urea and ammonium nitrate as raw materials to prepare titanium dioxide sol, and then dissolving the sol in 350-Sintering at 550 ℃ to obtain P25 type titanium oxide nano powder (ZL200510045293.6) with the crystal phase composition of 70 percent of anatase and 30 percent of rutile, wherein TiCl used in the method 4 And hydrochloric acid has extremely high volatility and corrosivity, is difficult to operate and has high requirements on equipment. The agglomeration of the sample is greatly increased in the sintering process of the sol-gel method, the specific surface area of the sample is reduced, and the photocatalytic activity of the sample is influenced.
(3) Solid phase method: taking common anatase titanium dioxide as a raw material, and obtaining anatase by ball milling and alcohol soaking at room temperature: rutile type is equal to 80:20, and P25 type nanometer titanium dioxide (CN201410440353.3) with the particle size of about 17 nm. The ball milling method has high degree of mechanization, but has the defects of large and heavy equipment volume, strong vibration and noise during operation, low working efficiency, product pollution caused by friction between a grinding body and a machine body and the like.
For this reason, there is a need in the art to develop a titanium dioxide having a simple preparation process and good photocatalytic performance.
Disclosure of Invention
The application aims to provide yellow P25 type nano titanium dioxide which has simple preparation process and high photocatalytic activity, thereby solving the problems in the prior art. The yellow P25 type nano titanium dioxide is prepared by a low-temperature hydrothermal method, and the specific surface area is 179-216m 2 ·g -1 Has visible light response and higher photocatalytic activity in the visible light region than that of commercial P25 titanium dioxide.
The application also aims to provide a preparation method for preparing the yellow P25 type nano titanium dioxide by a low-temperature hydrothermal method.
The application also aims to provide application of the yellow P25 type nano titanium dioxide as a photocatalyst.
In order to solve the above technical problems, the present application provides the following technical solutions.
In a first aspect, the application provides yellow P25 nano titanium dioxide, which is characterized in that the yellow P25 nano titanium dioxide is prepared by a low-temperature hydrothermal method, the average particle size of the yellow P25 nano titanium dioxide is less than or equal to 10 nanometers, and the specific surface area of the yellow P25 nano titanium dioxide is179-216m 2 ·g -1 The yellow P25 type nano titanium dioxide has visible light response, and the crystal form distribution of the yellow P25 type nano titanium dioxide is that the weight ratio of anatase type/rutile type is 70:30-80: 20.
In a second aspect, the present application provides a method for preparing the yellow P25 nano titanium dioxide according to the first aspect, wherein the method comprises the following steps:
s1: mixing a titanium source and deionized water to obtain a colorless and transparent clear solution A;
s2: mixing the solution A and an oxidant to obtain a transparent red clear solution B;
s3: carrying out hydrothermal treatment on the solution B to obtain a solid precipitate C;
and, S4: and washing, filtering and drying the solid precipitate C to obtain yellow P25 type nano titanium dioxide.
In one embodiment of the second aspect, the method comprises the steps of:
s1: placing a titanium source in deionized water, and stirring for a first preset time period to obtain a transparent colorless solution A;
s2: adding an oxidant into the colorless solution A under the stirring condition, and continuously stirring for a second preset time period to obtain a transparent red solution B;
s3: carrying out hydrothermal treatment on the red solution B in a sealed high-pressure reaction container at the reaction temperature of 100-120 ℃ for a third predetermined time period to obtain a solid C;
and, S4: and washing the solid C to be neutral by using deionized water, and drying to obtain the yellow P25 type nano titanium dioxide.
In one embodiment of the second aspect, the titanium source is titanyl sulfate or titanium sulfate.
In one embodiment of the second aspect, the oxidizing agent is hydrogen peroxide.
In one embodiment of the second aspect, the mass ratio of the oxidizing agent to the titanium source is from 1:1 to 3: 1.
In one embodiment of the second aspect, the mass ratio of the hydrogen peroxide to the titanyl sulfate is 2: 1.
In one embodiment of the second aspect, in step S4, the reaction temperature is 120 ℃.
In one embodiment of the second aspect, the first predetermined period of time is 2-4 hours; the second predetermined period of time is 5-15 minutes; the third predetermined period of time is 2-4 hours.
In one embodiment of the second aspect, the closed, high pressure reaction vessel comprises a PPL liner.
In one embodiment of the second aspect, said drying comprises drying said solid C at 80 ℃.
In a third aspect, the present application provides a use of the yellow P25 type nano titanium dioxide as described in the first aspect as a photocatalyst.
In one embodiment of the third aspect, the photocatalyst is used to treat dye wastewater.
Compared with the prior art, the invention has the advantages that:
(1) the titanium source used in the invention is titanyl sulfate or titanium sulfate, which is cheap and easy to obtain, volatile acid is not generated in the using process, high-temperature treatment is not needed in the preparation process, the requirement on equipment is not high, and the preparation cost is low;
(2) the sample prepared by the method has smaller particle size and higher specific surface area, and shows higher photocatalytic performance;
(3) the proportion of anatase type and rutile type in the P25 type nano titanium dioxide photocatalytic material prepared by the invention can be adjusted according to the reaction temperature;
(4) the P25 type nano titanium dioxide photocatalytic material prepared by the invention is yellow, has higher photocatalytic activity in a visible light region, and greatly increases the light utilization efficiency.
(5) The method and the equipment are simple, convenient to operate and control, green, economical and easy to popularize.
Drawings
The technical features and advantages of the present invention are more fully understood by referring to the following detailed description in conjunction with the accompanying drawings.
Fig. 1 is a flow chart of the preparation of nano titanium dioxide type P25 according to the present application.
FIG. 2 is an X-ray diffraction pattern of nano-titanium dioxide form P25 prepared according to examples 1-6 of the present application.
Fig. 3 is a nitrogen adsorption desorption isotherm of nano titanium dioxide type P25 prepared according to examples 1 to 6 of the present application.
FIG. 4 is a graph showing photocatalytic degradation of rhodamine B by P25 type nano titanium dioxide prepared according to examples 1 to 6 of the present application and by the commercial P25 type nano titanium dioxide of comparative example 1.
Detailed Description
Unless otherwise indicated, implied from the context, or customary in the art, all parts and percentages herein are by weight and the testing and characterization methods used are synchronized with the filing date of the present application. Where applicable, the contents of any patent, patent application, or publication referred to in this application are incorporated herein by reference in their entirety and their equivalent family patents are also incorporated by reference, especially as they disclose definitions relating to synthetic techniques, products and process designs, polymers, comonomers, initiators or catalysts, and the like, in the art. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.
The numerical ranges in this application are approximations, and thus may include values outside of the ranges unless otherwise specified. A numerical range includes all numbers from the lower value to the upper value, in increments of 1 unit, provided that there is a separation of at least 2 units between any lower value and any higher value. For example, if a compositional, physical, or other property (e.g., molecular weight, melt index, etc.) is recited as 100 to 1000, it is intended that all individual values, e.g., 100, 101,102, etc., and all subranges, e.g., 100 to 166,155 to 170,198 to 200, etc., are explicitly recited. For ranges containing a numerical value less than 1 or containing a fraction greater than 1 (e.g., 1.1, 1.5, etc.), then 1 unit is considered appropriate to be 0.0001, 0.001, 0.01, or 0.1. For ranges containing single digit numbers less than 10 (e.g., 1 to 5), 1 unit is typically considered 0.1. These are merely specific examples of what is intended to be expressed and all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be expressly stated in this application. It should also be noted that the terms "first," "second," and the like herein do not define a sequential order, but merely distinguish between different structures.
When used with respect to chemical compounds, the singular includes all isomeric forms and vice versa (e.g., "hexane" includes all isomers of hexane, individually or collectively) unless expressly specified otherwise. In addition, unless explicitly stated otherwise, the use of the terms "a", "an" or "the" are intended to include the plural forms thereof.
The terms "comprising," "including," "having," and derivatives thereof do not exclude the presence of any other component, step or procedure, and are not intended to exclude the presence of other elements, steps or procedures not expressly disclosed herein. To the extent that any doubt is eliminated, all compositions herein containing, including, or having the term "comprise" may contain any additional additive, adjuvant, or compound, unless expressly stated otherwise. Rather, the term "consisting essentially of … …" excludes any other components, steps or processes from the scope of any of the terms hereinafter recited, except those necessary for performance. The term "consisting of … …" does not include any components, steps or processes not specifically described or listed. Unless explicitly stated otherwise, the term "or" refers to the listed individual members or any combination thereof.
In one embodiment, the invention provides a method for preparing P25 nano titanium dioxide by a low-temperature hydrothermal method, which comprises the following steps:
(1) putting titanyl sulfate or titanium sulfate into deionized water, and fully stirring for about 3 hours to obtain a transparent solution A;
(2) dropwise adding a certain amount of hydrogen peroxide into the transparent solution A under continuous stirring, and continuously stirring for about 10 minutes to obtain a transparent red solution B;
(3) transferring the solution B into a reaction kettle containing a PPL lining, and carrying out hydrothermal treatment for 3 hours to obtain solid C;
(4) and washing the solid C with deionized water to be neutral, and drying to obtain a finished product.
Through the steps, the P25 type nanometer titania photocatalyst material containing anatase type titania in 70-80% and rutile type titania in 20-30% may be obtained. The average particle size is 9-10nm, and the specific surface area of the sample is 179-216m 2 /g。
In the step (1), the titanium source is titanyl sulfate or titanium sulfate.
In the step (2), the mass ratio of the hydrogen peroxide to the titanyl sulfate is 1:1-3: 1.
In the step (3), the reaction temperature is 100-120 ℃.
In a preferred embodiment, the mass ratio of the hydrogen peroxide to the titanyl sulfate is 2:1, the reaction temperature is 120 ℃, the obtained P25 type nano titanium dioxide photocatalytic material has the best photocatalytic performance, and the efficiency of degrading waste water by visible light is obviously higher than that of commercial P25.
The invention also provides application of the P25 type nano titanium dioxide as a photocatalytic material in dye wastewater.
Examples
The technical solutions of the present application will be clearly and completely described below with reference to the embodiments of the present application. The reagents and raw materials used are commercially available unless otherwise specified. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
The experimental operation steps for photocatalytic degradation of dye wastewater are as follows: in the invention, a 50W xenon lamp is used as a visible light source (the light wavelength is more than 420nm), in the photocatalysis experiment of the invention, 80mg of prepared P25 type nano titanium dioxide photocatalysis material is dispersed into 100mL of 10 < -5 > mol.L < -1 > rhodamine B (RhB) solution, and the solution is placed in a dark place for about 30 minutes under continuous stirring to achieve adsorption balance; then, the light source and the cooling water were turned on, and a photodegradation experiment was performed by sampling every 20 minutes, and the absorbance of the solution was measured after centrifugation using an ultraviolet-visible spectrophotometer made by a Lambda 35 model of Perkin Elmer.
Preparation examples
Example 1
The embodiment relates to preparation of a P25 type nano titanium dioxide photocatalytic material, and the preparation process is shown in figure 1.
The preparation method comprises the following steps:
1. dissolving titanyl sulfate: after 4g titanyl sulfate (TiOSO 4. mu.2H 2O) was dissolved in 130mL deionized water with magnetic stirring and stirring was continued for about 3 hours, colorless transparent solution A was obtained.
2. Preparation of precursor liquid B: 4mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with continuous stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 100 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code of H3T120 according to the embodiment 1.
The sample characterization results are shown in table 1.
Example 2
The preparation method of the P25 type nano titanium dioxide photocatalytic material comprises the following steps:
1. dissolving titanyl sulfate: after 4g of titanyl sulfate (TiOSO 4. sup.2H 2O) was dissolved in 130mL of deionized water with magnetic stirring, stirring was continued for about 3 hours to give colorless transparent solution A.
2. Preparation of precursor liquid B: 4mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with continuous stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 120 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code of H3T100 according to the embodiment 2.
The sample characterization results are shown in table 1.
Example 3
The preparation method of the P25 type nano titanium dioxide photocatalytic material comprises the following steps:
1. dissolving titanyl sulfate: after 4g titanyl sulfate (TiOSO 4. mu.2H 2O) was dissolved in 130mL deionized water with magnetic stirring and stirring was continued for about 3 hours, colorless transparent solution A was obtained.
2. Preparation of precursor liquid B: 8mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with continuous stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 100 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code number of H2T120 according to the embodiment 3.
The sample characterization results are shown in table 1.
Example 4
The preparation method of the P25 type nano titanium dioxide photocatalytic material comprises the following steps:
1. dissolving titanyl sulfate: after 4g titanyl sulfate (TiOSO 4. mu.2H 2O) was dissolved in 130mL deionized water with magnetic stirring and stirring was continued for about 3 hours, colorless transparent solution A was obtained.
2. Preparation of precursor liquid B: 8mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with continuous stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 120 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code of H2T100 according to the embodiment 4.
The sample characterization results are shown in table 1.
Example 5
The preparation method of the P25 type nano titanium dioxide photocatalytic material comprises the following steps:
1. dissolving titanyl sulfate: after 4g titanyl sulfate (TiOSO 4. mu.2H 2O) was dissolved in 130mL deionized water with magnetic stirring and stirring was continued for about 3 hours, colorless transparent solution A was obtained.
2. Preparation of precursor liquid B: 12mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with constant stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 100 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code of H1T120 according to the embodiment 5.
The sample characterization results are shown in table 1.
Example 6
The preparation method of the P25 type nano titanium dioxide photocatalytic material comprises the following steps:
1. dissolving titanyl sulfate: after 4g titanyl sulfate (TiOSO 4. mu.2H 2O) was dissolved in 130mL deionized water with magnetic stirring and stirring was continued for about 3 hours, colorless transparent solution A was obtained.
2. Preparation of precursor liquid B: 12mL of hydrogen peroxide are added dropwise to the colorless, transparent solution A with constant stirring, and after stirring for about 3 hours, a red, transparent solution B is obtained.
3. And transferring the red transparent solution B into a high-pressure reaction kettle containing a PPL lining, carrying out hydrothermal treatment at 120 ℃ for 3h, cooling, and carrying out suction filtration to obtain a precipitate C.
4. Washing the precipitate C with deionized water until the washing liquid is neutral, performing suction filtration, transferring the filter cake to an oven at 80 ℃, drying, and grinding to obtain the P25 type nano titanium dioxide photocatalytic material with the code of H1T100 according to the embodiment 6.
The sample characterization results are shown in table 1.
Table 1 shows the preparation conditions, particle size, specific surface area and composition of the yellow P25 type nano titania prepared according to examples 1-6. Referring to fig. 2 and 3, it can be seen from table 1 that the present invention can prepare a yellow P25 type nano titania photocatalytic material containing about 70-80% anatase titania and about 20-30% rutile titania. The average particle size is less than 10nm, and the specific surface area of the sample is 179-216m 2 /g。
Table 1 preparation conditions, particle size and specific surface area of titanium dioxide type P25 of examples 1-6.
Effects of the embodiment
Example 7
1. Weighing 80g of the P25 type nano titanium dioxide photocatalytic material prepared in the example 1, dispersing the material into 100mL of 10-5 mol.L-1 rhodamine B (RhB) solution, continuously stirring, and placing the solution in a dark place for about 30 minutes to achieve adsorption balance;
2. and (3) turning on a light source and cooling water, carrying out a photodegradation experiment, sampling 5mL every 20 minutes, measuring the absorbance of the solution after centrifugal separation, and calculating the photocatalytic degradation efficiency.
Example 8
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was the P25 type nano titanium dioxide prepared in example 2.
Example 9
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was the P25 type nano titanium dioxide prepared in example 3.
Example 10
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was the P25 type nano titanium dioxide prepared in example 4.
Example 11
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was the P25 type nano titanium dioxide prepared in example 5.
Example 12
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was the P25 type nano titanium dioxide prepared in example 6.
Comparative example 1
The experimental method, the catalyst dosage, the rhodamine B concentration and the dosage in the embodiment are the same as those in the comparative example 1, and the difference is only the selection of the P25 type nanometer titanium dioxide photocatalytic material. The photocatalytic material used in this example was commercial P25 (degussa) type nano titania.
FIG. 4 is a graph showing photocatalytic degradation of rhodamine B by P25 type nano titanium dioxide prepared according to examples 1 to 6 of the present application and by the commercial P25 type nano titanium dioxide of comparative example 1. As can be seen from FIG. 4, the photocatalytic activity of the yellow P25-type nano titanium dioxide is higher than that of the commercially available P25-type nano titanium dioxide. And the H2T120 yellow P25 nano titanium dioxide prepared in the example 3 has the highest photocatalytic activity.
The raw materials used in the application are all commercially available raw materials, are wide in source and can be produced in a large scale.
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.
Claims (10)
1. The yellow P25 type nano titanium dioxide is characterized in that the yellow P25 type nano titanium dioxide is prepared by a low-temperature hydrothermal method, the average particle size of the yellow P25 type nano titanium dioxide is less than or equal to 10 nanometers, and the specific surface area of the yellow P25 type nano titanium dioxide is 179-216m 2 ·g -1 The yellow P25 type nano titanium dioxide has visible light response, and the crystal form distribution of the yellow P25 type nano titanium dioxide is that the weight ratio of anatase type/rutile type is 70:30-80: 20.
2. The method for preparing the yellow P25-type nano titanium dioxide according to claim 1, wherein the method comprises the following steps:
s1: mixing a titanium source and deionized water to obtain a colorless and transparent clear solution A;
s2: mixing the solution A and an oxidant to obtain a transparent red clear solution B;
s3: carrying out hydrothermal treatment on the solution B to obtain a solid precipitate C;
and, S4: and washing, filtering and drying the solid precipitate C to obtain yellow P25 type nano titanium dioxide.
3. The method of claim 2, wherein the method comprises the steps of:
s1: placing a titanium source in deionized water, and stirring for a first preset time period to obtain a transparent colorless solution A;
s2: adding an oxidant into the colorless solution A under the stirring condition, and continuously stirring for a second preset time period to obtain a transparent red solution B;
s3: carrying out hydrothermal treatment on the red solution B in a sealed high-pressure reaction container at the reaction temperature of 100-120 ℃ for a third predetermined time period to obtain a solid C;
and, S4: and washing the solid C to be neutral by using deionized water, and drying to obtain the yellow P25 type nano titanium dioxide.
4. The method of claim 3, wherein the titanium source is titanyl sulfate or titanium sulfate;
the oxidant is hydrogen peroxide.
5. The method of claim 3, wherein the mass ratio of the oxidizing agent to the titanium source is from 1:1 to 3: 1.
6. The method of claim 4, wherein the mass ratio of the hydrogen peroxide to the titanyl sulfate is 2: 1;
in step S4, the reaction temperature was 120 ℃.
7. The method of any one of claims 2-6, wherein the first predetermined period of time is 2-4 hours; the second predetermined period of time is 5-15 minutes; the third predetermined period of time is 2-4 hours.
8. The method of claim 2, wherein the closed, high pressure reaction vessel comprises a PPL liner;
the drying comprises drying the solid C at 80 ℃.
9. Use of the yellow P25-type nano titanium dioxide according to claim 1 as a photocatalyst.
10. The use according to claim 1, wherein the photocatalyst is used for treating dye wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210204165.5A CN114804198B (en) | 2022-03-03 | 2022-03-03 | Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210204165.5A CN114804198B (en) | 2022-03-03 | 2022-03-03 | Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114804198A true CN114804198A (en) | 2022-07-29 |
| CN114804198B CN114804198B (en) | 2024-01-26 |
Family
ID=82529270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210204165.5A Active CN114804198B (en) | 2022-03-03 | 2022-03-03 | Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114804198B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100756199B1 (en) * | 2006-11-24 | 2007-09-06 | 한국화학연구원 | Synthesis method of nanocrystalline anatase titanium oxide powders from titanium oxysulfate |
| CN101049962A (en) * | 2007-05-18 | 2007-10-10 | 广东省生态环境与土壤研究所 | Method for preparing sol of neutral Nano titanium dioxide |
| CN101595059A (en) * | 2006-09-21 | 2009-12-02 | 托库森美国股份有限公司 | The temperature production method of the TiO 2 particles of nanometer size |
| CN101791546A (en) * | 2010-03-04 | 2010-08-04 | 上海大学 | Method for preparing mixed-phase nano-titania hydrosol photocatalyst |
| CN102658104A (en) * | 2012-04-24 | 2012-09-12 | 重庆大学 | Preparation method for TiO2 with photocatalytic activity under visible light |
| CN103570064A (en) * | 2013-11-07 | 2014-02-12 | 连云港职业技术学院 | Mixed crystal echinoid TiO2 hollow sphere and preparation method thereof |
| CN104445388A (en) * | 2014-11-10 | 2015-03-25 | 南京大学 | Low-temperature preparation method of nano mixed crystal of brookite and rutile titanium dioxide |
| CN105618021A (en) * | 2015-12-28 | 2016-06-01 | 南昌航空大学 | H2O2 modified anatase/rutile titanium dioxide nanocrystal composite |
| CN107159192A (en) * | 2017-06-12 | 2017-09-15 | 青岛科技大学 | A kind of noble metal/TiO2Multilevel hierarchy of mixed crystal nanometer rods assembling and preparation method thereof |
-
2022
- 2022-03-03 CN CN202210204165.5A patent/CN114804198B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101595059A (en) * | 2006-09-21 | 2009-12-02 | 托库森美国股份有限公司 | The temperature production method of the TiO 2 particles of nanometer size |
| KR100756199B1 (en) * | 2006-11-24 | 2007-09-06 | 한국화학연구원 | Synthesis method of nanocrystalline anatase titanium oxide powders from titanium oxysulfate |
| CN101049962A (en) * | 2007-05-18 | 2007-10-10 | 广东省生态环境与土壤研究所 | Method for preparing sol of neutral Nano titanium dioxide |
| CN101791546A (en) * | 2010-03-04 | 2010-08-04 | 上海大学 | Method for preparing mixed-phase nano-titania hydrosol photocatalyst |
| CN102658104A (en) * | 2012-04-24 | 2012-09-12 | 重庆大学 | Preparation method for TiO2 with photocatalytic activity under visible light |
| CN103570064A (en) * | 2013-11-07 | 2014-02-12 | 连云港职业技术学院 | Mixed crystal echinoid TiO2 hollow sphere and preparation method thereof |
| CN104445388A (en) * | 2014-11-10 | 2015-03-25 | 南京大学 | Low-temperature preparation method of nano mixed crystal of brookite and rutile titanium dioxide |
| CN105618021A (en) * | 2015-12-28 | 2016-06-01 | 南昌航空大学 | H2O2 modified anatase/rutile titanium dioxide nanocrystal composite |
| CN107159192A (en) * | 2017-06-12 | 2017-09-15 | 青岛科技大学 | A kind of noble metal/TiO2Multilevel hierarchy of mixed crystal nanometer rods assembling and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114804198B (en) | 2024-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Samsudin et al. | Synergetic effects in novel hydrogenated F-doped TiO2 photocatalysts | |
| Ahmed et al. | Photocatalytic degradation of methylene blue dye using Fe2O3/TiO2 nanoparticles prepared by sol–gel method | |
| Wei et al. | Preparation and photocatalysis of TiO 2 nanoparticles co-doped with nitrogen and lanthanum | |
| Hirano et al. | Direct formation of anatase (TiO2)/silica (SiO2) composite nanoparticles with high phase stability of 1300° C from acidic solution by hydrolysis under hydrothermal condition | |
| Eskandarloo et al. | Ultrasonic-assisted synthesis of Ce doped cubic–hexagonal ZnTiO3 with highly efficient sonocatalytic activity | |
| Gao et al. | Preparation of Er3+: YAlO3/Fe-doped TiO2–ZnO and its application in photocatalytic degradation of dyes under solar light irradiation | |
| Huixian et al. | Preparation and photocatalytic activity of La3+ and Eu3+ co-doped TiO2 nanoparticles: photo-assisted degradation of methylene blue | |
| Sclafani et al. | Influence of platinum on catalytic activity of polycrystalline WO3 employed for phenol photodegradation in aqueous suspension | |
| Lan et al. | Preparation of lanthanum and boron co-doped TiO2 by modified sol–gel method and study their photocatalytic activity | |
| CN101041129B (en) | Yttria/titanium dioxide nano composite material and preparation process thereof | |
| Colón et al. | Effect of ZrO2 incorporation and calcination temperature on the photocatalytic activity of commercial TiO2 for salicylic acid and Cr (VI) photodegradation | |
| Fang et al. | Dependence of nitrogen doping on TiO2 precursor annealed under NH3 flow | |
| CN107890867B (en) | Gray Pd/TiO2Nanowire photocatalyst and preparation method and application thereof | |
| CN107456983A (en) | A kind of Ag/AgCl/TiO2Composite photocatalyst material and its preparation method and application | |
| Kaur et al. | Visible–light induced photocatalytic degradation of fungicide with Fe and Si doped TiO2 nanoparticles | |
| Zhu et al. | Preparation and visible photocatalytic dye degradation of Mn-TiO 2/sepiolite photocatalysts | |
| CN106362768B (en) | A kind of honeycomb ceramic plate loads TiO2The preparation technology of the immobilized photochemical catalysts of-NCP | |
| CN100375649C (en) | Method for preparing kernel-shell structure, visible light catalysis activity type nanometer composite material | |
| CN106693946A (en) | Preparation method of graphene/titanium oxide composite visible light photocatalyst | |
| Szołdra et al. | Effect of brookite on the photocatalytic properties of mixed-phase TiO2 obtained at a higher temperature | |
| JP2009178636A (en) | Titanium oxide photocatalyst showing high photocatalytic activity under visible light, and its manufacturing method | |
| CN114804198B (en) | Yellow P25 type nano titanium dioxide, preparation method thereof and application thereof as photocatalyst | |
| Shirzad Taghanaki et al. | Photocatalytic degradation of ethylbenzene by nano photocatalyst in aerogel form based on titania | |
| Wangcheng et al. | Synthesis of Ln-doped MCM-41 mesoporous materials and their catalytic performance in oxidation of styrene | |
| CN105562039B (en) | A kind of telluric acid titanium photochemical catalyst, preparation method and applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |