CN100534911C - Production and application for non-metallic doped nano-TiO - Google Patents
Production and application for non-metallic doped nano-TiO Download PDFInfo
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- CN100534911C CN100534911C CNB2007100686088A CN200710068608A CN100534911C CN 100534911 C CN100534911 C CN 100534911C CN B2007100686088 A CNB2007100686088 A CN B2007100686088A CN 200710068608 A CN200710068608 A CN 200710068608A CN 100534911 C CN100534911 C CN 100534911C
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- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000002360 preparation method Methods 0.000 claims description 21
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 20
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 13
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 10
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 4
- 239000002243 precursor Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract 1
- 230000002779 inactivation Effects 0.000 abstract 1
- 150000002736 metal compounds Chemical class 0.000 abstract 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 238000000034 method Methods 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- 230000001699 photocatalysis Effects 0.000 description 11
- 239000010936 titanium Substances 0.000 description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 229910004338 Ti-S Inorganic materials 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 229910011208 Ti—N Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 229910003077 Ti−O Inorganic materials 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 150000001555 benzenes Chemical class 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 150000003738 xylenes Chemical class 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- -1 formaldehyde, benzene series Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
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- 125000004434 sulfur atom Chemical group 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
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Abstract
Production non-metal doped nano-TiO2 is carried out by taking Ti non-metal compound as precursor, mixing it with acid and water, hydrothermal synthetic reacting at 110-300 degree for 1-60 hrs, washing, drying and grinding to obtain nano-TiO2 catalyst. It has no secondary pollutant and inactivation and better light catalytic effect.
Description
Technical field
The present invention relates to the application of a kind of nonmetal doping nano titanium dioxide photocatalyst and preparation method thereof and photocatalysis to degrade organic matter.This catalyzer is mainly used in room air pollution control techniques field.
Background technology
Atmosphere polluting problem has become the three big pollution sources that rainwater, solid waste become together influences environment for human survival in recent years, though generally speaking topsoil mainly is outdoor, the pollution of room air but is the primary pollution source that influences health of people.In the latter stage nineties, along with the high speed development of the raising, particularly building materials industry of domestic housing reform and national life level, the rise of fitting-up craze has been become the main mode of indoor pollution by the pollution that finishing material caused.
Under the present living conditions of China, the rate of curing the disease and the mortality ratio that are caused by room air are very high, principal pollutant in the room air have oxynitride, sulfide, formaldehyde and benzene series thing, wherein the pollution of the formaldehyde that is caused by finishing material, benzene series thing volatile organic compoundss (VOCs) such as (benzene,toluene,xylenes) has become the main pollution factor of present room air.Western developed country has been issued decree, control is carried out in discharging to VOCs, China also defines the emission limit of 33 kinds of pollutents in " discharge standard of air pollutants " that enacted and enforced in 1997, wherein major part is formaldehyde, benzene series thing volatile organic compoundss such as (benzene,toluene,xylenes).Therefore volatile organic matter has become the main object and the target of present room air pollution research.
Remove airborne VOCs, usually adopting ventilates directly is discharged to outdoorly, or with charcoal absorption and catalyzed oxidation decomposition method, these measures all can cause some secondary pollutions.In recent years and since photocatalysis technology have nontoxic, reaction conditions is gentle, selectivity is little, the mineralization rate advantages of higher, at degradation of contaminant, especially the organism aspect more and more is subject to people's attention.Gas-solid phase conductor photocatalysis oxidizing reaction especially aspect the degraded of VOCs, owing to itself distinctive outstanding feature, has become hot research in recent years gradually, and has more and more shown its broad application prospect.
In light-catalysed practical application, because TiO
2Energy gap broad (Eg=3.2ev), therefore have only the ultraviolet ray of λ＜387.5nm to be absorbed, but this part only accounts for 5% of solar energy in sunlight, therefore in actual applications, the utilization ratio of sunlight is extremely low, and in order to address this problem, the method that all adopts is basically at present mixed exactly, a kind of doping techniques that the most of research workers of metal ion mixing take, its principle is that metal ion is incorporated into TiO
2Intracell, thus in its lattice, introduce new electric charge, form defective or change lattice types, influence light induced electron and hole moving situation, adjust its distribution or change TiO
2Energy band structure, finally cause its photocatalytic activity to change.Though yet the doping of metal ion can improve TiO
2Activity under visible light, but also exist certain defective, thus because the doping of metal ion makes metal ion become the deathnium, make TiO
2Descend at the photocatalytic activity of ultraviolet region, in addition because the doping of metal ion also can make TiO
2The bad stability of itself.
Along with calendar year 2001 Asahi (R.Asahi, T.Morikawa, T.Ohwahi, K.Aoki, Y.Taga.Visible-Light Photocatalysis in Nitrogen-doped Titanium Oxides, Science, 2001,293:269～271) on Science, replace the adulterated TiO of nitrogen of lattice oxygen about nitrogen
2-XN
XMake delivering of its paper not reducing under the active prerequisite of UV-light, opened TiO with visible light activity
2The prelude of nonmetal doping.But, all also exist certain defective with regard to the present most of research workers' that provide nonmetal doping technology.
Publication number is: CN1454710, patent is by name: nitrogenous optically catalytic TiO 2 film and preparation method thereof, provide a kind of method that adopts magnetically controlled sputter method to prepare a kind of nitrogenous optically catalytic TiO 2 film, its complex process but also need expensive equipment; Patent publication No. is: CN1712128A, patent is by name: the preparation method of the adulterated anatase-type nanometer titanium dioxide of a kind of nitrogen, announced that a kind of need provide titanium source, precipitation agent, nitrogenous source and water, and according to certain mixed, pass through hydro-thermal reaction then, drying obtains the adulterated nano-TiO of a kind of nitrogen after the oven dry
2Method, but the prescription of this technology is comparatively complicated, the factor of influence is too many, condition is wayward; Patent publication No. is: CN150616A, and patent is by name: the preparation method of nitrogen-doped titanium dioxide powder provides in a kind of compound that ammoniacal liquor is added drop-wise to gradually titanium, then through filtering, drying after the oven dry, obtains the adulterated nano-TiO of a kind of nitrogen behind high temperature sintering
2Method, but owing to need the process of a high temperature sintering in the technology, owing to reunite its particle diameter is become greatly and the high temperature sintering processing can make catalyzer, specific surface area diminishes, even also can cause the decline of the structural stability and the homogeneity of catalyzer.
Summary of the invention
The invention provides a kind of reaction conditions gentleness, the simple nonmetal doping nano-TiO of equipment
2The preparation method.
Generally speaking, N, C, S atom are difficult in the environment of hydro-thermal and form Ti-N key, Ti-C key and Ti-S key with Ti, because Ti (OH)
4In the Ti-O key be difficult in the down fracture of environment of hydro-thermal, form TiO thereby make N, C and S replace O
2-XN
X, TiO
2-XC
X, TiO
2-XS
XSo in the ordinary course of things, nonmetallic doping generally all needs the process of high temperature sintering, because under the pyritous condition, the Ti-O key ruptures easily.
The present invention is itself just to have TiN, TiC and the TiS of Ti-N key, Ti-C key and Ti-S key
2Be presoma, provide under the prerequisite in other nitrogen, carbon, sulphur source and titanium source not needing, utilize TiN, TiC and TiS
2Ti-N key, Ti-C key and Ti-S key that itself exists, the nano-TiO of the direct synthetic nitrogen of employing hydrothermal synthesis method, carbon, sulfur doping
2-XN
X, TiO
2-XC
XAnd TiO
2-XS
X, to overcome in the prior art because some defectives that unavoidable high temperature sintering brings.
A kind of nonmetal doping nano-TiO
2The preparation method, be presoma with the nonmetallic compound of Ti, mixes with acid, water and carries out hydrothermal synthesis reaction, hydrothermal synthesis reaction is after washing, dry, nano-TiO that grinding obtains nonmetal doping
2Catalyzer, described hydrothermal synthesis reaction temperature is 110～300 ℃, the reaction times is 1h～60h.
The nonmetallic compound of described Ti is TiN, TiC or TiS
2, the concentration of the nonmetallic compound of Ti is 0.1～3mol/L.
Described acid is one or several in hydrochloric acid, acetic acid, the sulfuric acid, and the total concn of acid is 0.1～2mol/L.
Compactedness when carrying out hydrothermal synthesis reaction (volume of filling solution accounts for the ratio of autoclave liner volume) 10～90%.
During reaction with TiN, TiC or TiS
2Carry out hydrothermal synthesis reaction in the teflon-lined autoclave with being transferred to have after certain density acid mixes, obtain the TiO that contains different crystal forms of nitrogen, carbon and sulfur doping
2-XN
X, TiO
2-XC
XAnd TiO
2-XS
XThis law at room temperature after the cooling, is washed through alcohol repeatedly after hydro-thermal is synthetic, washing, and centrifugation obtains the nano-TiO of nitrogen, carbon and the sulfur doping of dispersity and better crystallinity degree afterwards through oven for drying after the grinding
2
Utilize the nano-TiO of the nonmetal doping that the inventive method prepares
2The particulate grain-size is 5～20nm, and based on anatase octahedrite, the scope of uv-visible absorption spectra is from 425～605nm.
From the angle of photochemical catalysis effect, described nitrogen doped Ti O
2-XN
X, TiO
2-XC
XAnd TiO
2-XS
XIn the process of degraded benzene, the non-secondary pollution thing generates, water and carbonic acid gas have all been generated, in humidity, under the identical condition of conditions such as oxygen concentration, its photocatalytic degradation effect is 1.1～4.2 times of commercial P25, and above-mentioned catalyzer of while photochemical catalysis effect in the use of continuous 8～48h remains stable, does not find deactivation phenomenom.
Description of drawings
The XRD figure of the powder of Fig. 1 embodiment 4 shows prepared nano-TiO
2Powder exists mutually with anatase octahedrite.
The UV-vis absorption spectrum of the powder of Fig. 2 embodiment 2 begins just to have absorption from 560nm.
The XPS collection of illustrative plates of the powder of Fig. 3 embodiment 3 shows the existence of nitrogen.
The XPS collection of illustrative plates of the powder of Fig. 4 embodiment 7 shows the existence of sulphur.
Embodiment
Embodiment 1
The hydrothermal preparation condition: employing TiN is a presoma, and volumetric molar concentration is 0.1M, adopts the pH value of HCl control solution, and volumetric molar concentration is 2M, 110 ℃ of hydrothermal temperatures, hydro-thermal time 60h, compactedness 50%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 2
The hydrothermal preparation condition: employing TiN is a presoma, and volumetric molar concentration is 3M, adopts H
2SO
4Control the pH value of solution, its volumetric molar concentration is 0.1M, 300 ℃ of hydrothermal temperatures, hydro-thermal time 1h, compactedness 30%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 3
The hydrothermal preparation condition: employing TiN is a presoma, and volumetric molar concentration is 0.5M, adopts CH
3COOH controls the pH value of solution, and its volumetric molar concentration is 0.5M, 200 ℃ of hydrothermal temperatures, hydro-thermal time 24h, compactedness 90%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 4
The hydrothermal preparation condition: employing TiC is a presoma, and volumetric molar concentration is 0.1M, adopts H
2SO
4Be used as the pH value of solvent and control solution, its volumetric molar concentration is 0.1M, 300 ℃ of hydrothermal temperatures, hydro-thermal time 60h, compactedness 10%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 5
The hydrothermal preparation condition: employing TiC is a presoma, and volumetric molar concentration is 3M, adopts CH
3COOH controls the pH value of solution, and its volumetric molar concentration is 2M, 110 ℃ of hydrothermal temperatures, hydro-thermal time 1h, compactedness 90%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 6
The hydrothermal preparation condition: employing TiC is a presoma, and volumetric molar concentration is 0.1M, adopts HCl to control the pH value of solution, and its volumetric molar concentration is 0.5M, 200 ℃ of hydrothermal temperatures, hydro-thermal time 1h, compactedness 50%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 7
Hydrothermal preparation condition: adopt TiS
2Be presoma, volumetric molar concentration is 0.5M, adopts the pH value of HCl control solution, and volumetric molar concentration is 2M, 200 ℃ of hydrothermal temperatures, hydro-thermal time 60h, compactedness 50%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 8
Hydrothermal preparation condition: adopt TiS
2Be presoma, volumetric molar concentration is 3M, adopts CH
3The pH value of COOH control solution, volumetric molar concentration is 0.5M, 300 ℃ of hydrothermal temperatures, hydro-thermal time 24h, compactedness 90%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Embodiment 9
Hydrothermal preparation condition: adopt TiS
2Be presoma, volumetric molar concentration is 0.5M, adopts H
2SO
4The pH value of control solution, volumetric molar concentration is 0.1M, 110 ℃ of hydrothermal temperatures, hydro-thermal time 24h, compactedness 10%.Hydrothermal synthesis reaction finishes after washing, dry, grind the nano-TiO that obtains nonmetal doping
2Catalyzer.
Sample to example 1～9 carries out the photocatalytic activity test
Continuous Flow is adopted in test, and experiment condition is: the starting point concentration 50mg/m of benzene
3, relative humidity 60%, oxygen content 21%, the load density of catalyzer is 6.25g/m
2, it is the high voltage mercury lamp of 125W that light source adopts power, (sample/P25) is the evaluation index of photocatalytic activity, and concrete outcome sees Table 1 with the ratio of the first order reaction apparent speed constant in the photochemical catalytic oxidation process
Table 1
| The embodiment sequence number | Acid | Presoma | Doped element | Maximum absorption wavelength (nm) | Photocatalytic activity |
| Embodiment 1 | HCl | TiN | N | 425 | 1.1 |
| Embodiment 2 | H 2SO 4 | TiN | N | 560 | 2.7 |
| Embodiment 3 | CH 3COOH | TiN | N | 605 | 4.2 |
| Embodiment 4 | H 2SO 4 | TiC | C | 505 | 1.6 |
| Embodiment 5 | CH 3COOH | TiC | C | 490 | 1.5 |
| Embodiment 6 | HCl | TiC | C | 545 | 2.3 |
| Embodiment 7 | HCl | TiS 2 | S | 580 | 3.3 |
| Embodiment 8 | CH 3COOH | TiS 2 | S | 520 | 2.2 |
| Embodiment 9 | H 2SO 4 | TiS 2 | S | 450 | 1.2 |
As can be seen from Table 1, respectively with TiN, TiC and TiS
2Nano-TiO for the nonmetal doping of precursor preparation
2Very significantly absorbing wavelength red shift and very high photocatalytic activity have all been obtained, especially with TiN the example 3 of precursor, its maximum absorption wavelength has reached 605nm, and photocatalytic degradation speed has reached 4.2 of P25 especially, illustrate: the nonmetal source with Ti is a precursor, the nano-TiO of the synthetic nonmetal doping that obtains of hydro-thermal
2, can very significantly absorb and utilize visible light, have very high photocatalytic activity.
Claims (5)
1, a kind of nonmetal doping nano-TiO
2The preparation method, it is characterized in that: the nonmetallic compound with Ti is a presoma, mixes and carries out hydrothermal synthesis reaction with acid, water, hydrothermal synthesis reaction is after washing, dry, nano-TiO that grinding obtains nonmetal doping
2Catalyzer, described hydrothermal synthesis reaction temperature is 110～300 ℃, the reaction times is 1h～60h;
The nonmetallic compound of described Ti is TiN, TiC or TiS
2
2, according to the described preparation method of claim 1, it is characterized in that: the concentration of the nonmetallic compound of described Ti is 0.1～3mol/L.
3, according to the described preparation method of claim 1, it is characterized in that: described acid is one or several in hydrochloric acid, acetic acid, the sulfuric acid.
4, according to the described preparation method of claim 1, it is characterized in that: the total concn of described acid is 0.1～2mol/L.
5, according to the described preparation method of claim 1, it is characterized in that: compactedness is 10～90% when carrying out hydrothermal synthesis reaction.
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| CNB2007100686088A CN100534911C (en) | 2007-05-16 | 2007-05-16 | Production and application for non-metallic doped nano-TiO |
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|---|---|---|---|
| CNB2007100686088A CN100534911C (en) | 2007-05-16 | 2007-05-16 | Production and application for non-metallic doped nano-TiO |
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| CN100534911C true CN100534911C (en) | 2009-09-02 |
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| CN113078266B (en) * | 2021-03-18 | 2022-12-27 | 中北大学 | Polyacid-modified titanium dioxide nano material and preparation method and application thereof |
| CN115624979B (en) * | 2022-10-19 | 2024-05-03 | 南京大学 | Application of modified black titanium dioxide in degradation of antibiotic wastewater |
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