CN101244384A - Photocatalyst having response to visible light and preparation thereof - Google Patents
Photocatalyst having response to visible light and preparation thereof Download PDFInfo
- Publication number
- CN101244384A CN101244384A CNA2007100537952A CN200710053795A CN101244384A CN 101244384 A CN101244384 A CN 101244384A CN A2007100537952 A CNA2007100537952 A CN A2007100537952A CN 200710053795 A CN200710053795 A CN 200710053795A CN 101244384 A CN101244384 A CN 101244384A
- Authority
- CN
- China
- Prior art keywords
- preparation
- visible light
- photochemical catalyst
- response
- slag
- 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
Images
Landscapes
- Catalysts (AREA)
Abstract
The invention relates to a visible-light responding photocatalyst and the preparation method. The technical proposal is that, the slag and 65wt% of the concentrated nitric acid are mixed at a mass ratio of 1:1 to 1:2, and are reacted together till no yellow smog NO2 is produced; water is added for stirring, and after standing for 5 to 20min, the upper liquid is extracted, and the hydrothermal reaction precursor is obtained; the hydrothermal reaction precursor is adjusted through NaOH or KOH solution into pH=9 to 12, and then switched into a high-pressure reactor at a filling degree of 60%-80%; the temperature inside the reactor is controlled within 120 to 180 centigrade; after reacting for 2 to 3 hours, cooling, filtering, rinsing two or three times by use of distilled water or tap water, the filter residue is dried and grinded under the temperature of 100 to 140 centigrade. Due to utilize slag as the material, the preparation method has the advantages of low cost, simple preparation technology, good catalytic activity, and easy commercial production. The produced porous catalyst has the advantages of large specific surface area, high activity, and strong response to 400 to 800 mm visible light.
Description
Technical field:
The invention belongs to the preparing technical field of nano-photocatalyst.Relate in particular to a kind of to visible light have response with steel-making blast furnace slag be photochemical catalyst of raw material and preparation method thereof.
Background technology:
Photocatalytic oxidation is handled waste water and is with a wide range of applications, photochemical catalyst almost can react with any organic pollution through the hydroxy radical (OH) that ultraviolet lighting produces, and its exhaustive oxidation become free of contamination carbon dioxide, water and mineral salt, this method not only can overcome the shortcoming that biological treatment is difficult to ring shaped molecule structure toxic pollutant in the waste water such as degradation of dye, agricultural chemicals, medicine, has also avoided flocculation, the precipitation method only can remove insoluble, the limitation of colloidal sol contact scar thing and the no thoroughness of general chemical oxidization method effect.Photocatalysis oxidation technique can carry out at normal temperatures and pressures, thoroughly destroys organic matter, does not have secondary pollution, is to be hopeful one of catalysis new technology of administering contaminated environment most.
Photochemical catalyst is the key factor that influences the photochemical catalytic oxidation effect, in numerous Nano semiconductor catalysis materials, and nano-TiO
2Have advantages such as chemical property is stable, catalytic efficiency is high, nontoxic, thereby become most widely used photochemical catalyst.The preparation method of titanium dioxide optical catalyst comprises vapor phase method, liquid phase method and sol-gel process; yet said method all is the chemical agents with the costlinesses such as alkoxide of titanium tetrachloride or titanium is that raw material is made (Cai Dengke, analogy sword brightness, Wen Xishan by certain technology; Lan Lei, Zhang Zhiqiang. nano-TiO
2Preparation and the development aspect water treatment applications [J] thereof. east china electric power, 2003,7:49-51), preparation process complexity, and the catalyst activity that makes is relatively poor, low to the visible light utilization rate, the cost height.
Therefore, how to make photochemical catalyst in visible-range, have the response and how to improve photocatalyst activity, become the emphasis of current photocatalysis technology area research.
The foreign scholar has carried out various trials at the problems referred to above, comprise with metal ion such as Cr, V, Mn, Fe or Ni ion deposition in the catalyst method and the ion of different material mixed (patent No.s 02801196.1) such as methods in the catalyst, to improve the visible light-responded of photochemical catalyst, but prepared photocatalyst activity may descend because of the compound of electronics and hole, therefore is not applied industrial.At home, have the photochemical catalyst of visible light activity and utilization (CN97181439.2) thereof and disclose and a kind ofly handle the photochemical catalyst that obtains to utilize visible light, but preparation method's complexity and activity are not high by in plasma, titanium dioxide being carried out CVD with the gaseous mixture of methane and hydrogen.
By at nano-TiO
2Surface deposition Ag, Au, Pt, Pd, Nb (wear red. precious metal alloys Application of Catalyst [J]. noble metal, 1999,20 (1): 58～61); And by adopt the photochemistry precipitation method (Wei Hongbin etc. the titanium dioxide film photochemical catalytic oxidation of humic acid research [J] in the aqueous solution. ACTA Scientiae Circumstantiae, 1998,18 (2): 161), Ag and Pt are deposited on TiO
2The scope that method on the film has improved activity of such catalysts to a certain extent and enlarged absorbing wavelength.But precious metal surface sedimentation cost is too high and be difficult to guarantee that noble metal is at nano-TiO
2Surperficial uniform deposition.
The waste residue that produces when blast furnace slag is iron and steel smelting before the seventies in 20th century, is stacked as trade waste always.Along with industrial expansion, the annual emissions of China's industrial residue has reached 5.6 hundred million tons, and wherein the annual emissions of blast furnace slag is about 3,000 ten thousand tons, and the accumulating amount of blast furnace slag will increase day by day.
Data shows that titanium-containing blast furnace slag has higher photocatalytic activity, reaches 1～2 μ m to particle mean size with titanium-containing blast furnace slag is levigate, and after handling under uniform temperature and the atmosphere, can be used as photochemical catalyst with the waterglass mixed load on sheet glass and use.(Liu fourth of the twelve Earthly Branches, Xue Xiangxin etc.The experimental study [J] of titanium-containing blast furnace slag photocatalytic degradation ortho-nitrophenol. the material Leader, 2006.1 (20): 140-142) still discarded titanium-containing blast furnace slag is directly used photocatalyst, catalytic efficiency is relatively poor.
Summary of the invention:
The object of the present invention is to provide a kind of preparation technology simple, with low cost, catalytic activity is good, is easier to industrial applications, 400～800nm visible light is had photochemical catalyst of strong response and preparation method thereof with respect to other photochemical catalyst.
For realizing above-mentioned task, the technical solution adopted in the present invention is: with the red fuming nitric acid (RFNA) of slag and 65wt% by mass ratio be 1: 1～1: 2 fused, reaction is to no longer including yellow smog NO
2Produce, add water and stir, leave standstill 5～20min, get supernatant liquid, promptly get the hydro-thermal reaction predecessor;
The hydro-thermal reaction predecessor is adjusted pH=9～12 with NaOH or KOH solution, change in the autoclave, compactedness is 60%～80%, reactor temperature is controlled at 120 ℃～180 ℃, reaction 2～3h, cooled and filtered is washed 2～3 times with distilled water or running water, after the filtration filter residue is descended oven dry, levigate at 100～140 ℃.
Wherein: the main chemical compositions of slag is that TFe is 3.71～38.08wt%, Al
2O
3Be that 7.24～16.08wt%, CaO are that 31.03～40.34wt%, MgO are 4.52～9.78wt%, TiO
2Be 0.98～14.20wt%, SiO
2Be 14.14～22.83wt%, granularity is 20～120 orders; The liner of autoclave is acidproof high pressure resistant material.
Because the hydro-thermal method that the present invention adopts is a kind of new preparation method of nano material, so can prepare the nanoparticle of purity height, good, the single dispersion of crystal formation, shape and controlled amount.The present invention is a raw material with the slag, has the advantages that with low cost, preparation technology is simple, be easy to suitability for industrialized production and application, and prepared catalyst is big, active high, the porous material that 400～800nm visible light had strong response of a kind of specific area.
Description of drawings
Fig. 1 is the prepared photochemical catalyst of the present invention (a), anatase TiO
2(b) the UV-vis spectrogram that diffuses;
Fig. 2 is prepared photochemical catalyst of the present invention and TiO
2The photocatalytic activity comparison diagram of photochemical catalyst.
The specific embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment 1
A kind of photochemical catalyst that visible light is had response and preparation method thereof: with main chemical compositions is that TFe is 3.71wt%, Al
2O
3For 16.08wt%, CaO are that 33.74wt%, MgO are 9.48t%, TiO
2Be 14.20wt%, SiO
2For the slag of 22.83wt% after ball mill is levigate, the screening granularity is 60～120 purpose slags, is 1: 1.0～1.2 fused with the red fuming nitric acid (RFNA) of 65wt% according to mass ratio with it, reacts to no longer including yellow smog NO
2Produce, add water and stir, leave standstill 10～20min, get supernatant liquid, promptly get the hydro-thermal reaction predecessor.
Then the hydro-thermal reaction predecessor is adjusted pH value to 9 with NaOH solution, change in the autoclave, the liner of autoclave is a polytetrafluoroethylene (PTFE), compactedness is 65%～75%, reactor temperature is controlled at 120 ℃～180 ℃, reaction 2h, the cooling back adopts the suction filtration mode to filter.Wash filter residue 2～3 times with distilled water.The gained filter residue is dry under 105 ℃ of conditions, promptly gets the photochemical catalyst that visible light is had response after levigate.
Embodiment 2
A kind of photochemical catalyst that visible light is had response and preparation method thereof: with main chemical compositions is that TFe is 21.46wt%, Al
2O
3For 7.24wt%, CaO are that 31.03wt%, MgO are 9.78t%, TiO
2Be 0.98wt%, SiO
2For the slag of 15.64wt% after ball mill is levigate, the screening granularity is 20～120 purpose slags, is 1: 1.5～1.8 fused with the red fuming nitric acid (RFNA) of 65wt% according to mass ratio with it, reacts to no longer including yellow smog NO
2Produce, add water and stir, leave standstill 10～20min, get supernatant liquid, promptly get the hydro-thermal reaction predecessor.
Then the hydro-thermal reaction predecessor is adjusted pH value to 11 with NaOH solution, change in the autoclave, the liner of autoclave is a polytetrafluoroethylene (PTFE), compactedness is 65%～75%, reactor temperature is controlled at 150 ℃～160 ℃, reaction 2h, the cooling back adopts the suction filtration mode to filter.With distilled water washing 2～3 times.The gained filter residue is dry under 105 ℃ of conditions, promptly gets the photochemical catalyst that visible light is had response after levigate.
The hydro-thermal method that this specific embodiment adopts on technology is a kind of new preparation method of nano material, can prepare the nanoparticle of purity height, good, the single dispersion of crystal formation, shape and controlled amount.Because this specific embodiment is raw material with the blast furnace slag, so have the advantages that with low cost, preparation technology is simple, be easy to suitability for industrialized production and application, and prepared catalyst is big, active high, the porous material that 400～800nm visible light had strong response of a kind of specific area.The prepared photochemical catalyst of the foregoing description to the response of light as shown in Figure 1, in the absorption of visible region much larger than TiO
2Photochemical catalyst; With the aqueous solution of rhodamine B is the simulating pollution aqueous systems to the evaluation of photocatalytic activity as shown in Figure 2, and the catalytic activity of the prepared photochemical catalyst of present embodiment is higher than TiO
2Photochemical catalyst.
Claims (4)
1, a kind of photochemical catalyst that visible light is had response and preparation method thereof, it is characterized in that with the red fuming nitric acid (RFNA) of slag and 65wt% by mass ratio be 1: 1～1: 2 fused, reaction is to no longer including yellow smog NO
2Produce, add water and stir, leave standstill 5～20min, get supernatant liquid, promptly get the hydro-thermal reaction predecessor;
The hydro-thermal reaction predecessor is adjusted pH=9～12 with NaOH or KOH solution, change in the autoclave, compactedness is 60%～80%, reactor temperature is controlled at 120 ℃～180 ℃, reaction 2～3h, cooled and filtered is washed 2～3 times with distilled water or running water, after the filtration filter residue is descended oven dry, levigate at 100～140 ℃.
2, photochemical catalyst that visible light is had response according to claim 1 and preparation method thereof is characterized in that the main chemical compositions of described slag is, TFe is 3.71～38.08wt%, Al
2O
3Be that 7.24～16.08wt%, CaO are that 31.03～40.34wt%, MgO are 4.52～9.78wt%, TiO
2Be 0.98～14.20wt%, SiO
2Be 14.14～22.83wt%, the granularity of slag is 20～120 orders.
3, photochemical catalyst that visible light is had response according to claim 1 and preparation method thereof, the liner that it is characterized in that described autoclave are acidproof high pressure resistant material.
4, according in the claim 1～3 each described to visible light have the photochemical catalyst preparation method of response prepared visible light is had the photochemical catalyst of response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100537952A CN100537023C (en) | 2007-11-08 | 2007-11-08 | Photocatalyst having response to visible light and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100537952A CN100537023C (en) | 2007-11-08 | 2007-11-08 | Photocatalyst having response to visible light and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101244384A true CN101244384A (en) | 2008-08-20 |
| CN100537023C CN100537023C (en) | 2009-09-09 |
Family
ID=39945197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100537952A Expired - Fee Related CN100537023C (en) | 2007-11-08 | 2007-11-08 | Photocatalyst having response to visible light and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100537023C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069001A (en) * | 2010-12-20 | 2011-05-25 | 武汉钢铁(集团)公司 | Preparation process for preparing photocatalyst from blast furnace slag serving as raw material |
| CN103252210A (en) * | 2013-05-22 | 2013-08-21 | 武汉红金龙印务股份有限公司 | Method for preparing adsorbent for volatile organic compounds (VOCs) in air |
| CN103422184A (en) * | 2012-05-23 | 2013-12-04 | 北京航空航天大学 | Preparation method of porous fiber with high specific surface area |
| CN109126685A (en) * | 2018-08-28 | 2019-01-04 | 中国地质大学（武汉） | A method of photocatalysis adsorbent material is prepared using high-titanium blast furnace slag |
| CN109317129A (en) * | 2018-10-12 | 2019-02-12 | 西安石油大学 | A kind of preparation method of micro-meter scale extra light calcined magnesia photochemical catalyst |
| CN109943112A (en) * | 2019-03-26 | 2019-06-28 | 安徽工业大学 | A kind of environmental photocatalysis fireproof coating and preparation method thereof for air cleaning |
| CN110003693A (en) * | 2019-04-18 | 2019-07-12 | 安徽工业大学 | A kind of photocatalysis fireproof coating and preparation method thereof for degradation of formaldehyde gas |
| CN113562804A (en) * | 2021-08-25 | 2021-10-29 | 上海交通大学 | Method for degrading herbicide by visible light |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100449341B1 (en) * | 2002-01-15 | 2004-09-22 | 이종황 | Photo catalytic powder combined with carrier and water paint using the same |
| CN1171669C (en) * | 2002-05-31 | 2004-10-20 | 东北大学 | Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium |
| CN100362113C (en) * | 2005-11-25 | 2008-01-16 | 东北大学 | Ecological treating method for blast furnace slag containing titanium |
| CN100430127C (en) * | 2006-07-10 | 2008-11-05 | 东北大学 | Process for preparing photo-catalytic materials by using strong magnetic field modified titanium-rich slag |
-
2007
- 2007-11-08 CN CNB2007100537952A patent/CN100537023C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069001A (en) * | 2010-12-20 | 2011-05-25 | 武汉钢铁(集团)公司 | Preparation process for preparing photocatalyst from blast furnace slag serving as raw material |
| CN102069001B (en) * | 2010-12-20 | 2012-07-04 | 武汉钢铁(集团)公司 | Preparation process for preparing photocatalyst from blast furnace slag serving as raw material |
| CN103422184A (en) * | 2012-05-23 | 2013-12-04 | 北京航空航天大学 | Preparation method of porous fiber with high specific surface area |
| CN103252210A (en) * | 2013-05-22 | 2013-08-21 | 武汉红金龙印务股份有限公司 | Method for preparing adsorbent for volatile organic compounds (VOCs) in air |
| CN109126685A (en) * | 2018-08-28 | 2019-01-04 | 中国地质大学（武汉） | A method of photocatalysis adsorbent material is prepared using high-titanium blast furnace slag |
| CN109317129A (en) * | 2018-10-12 | 2019-02-12 | 西安石油大学 | A kind of preparation method of micro-meter scale extra light calcined magnesia photochemical catalyst |
| CN109943112A (en) * | 2019-03-26 | 2019-06-28 | 安徽工业大学 | A kind of environmental photocatalysis fireproof coating and preparation method thereof for air cleaning |
| CN110003693A (en) * | 2019-04-18 | 2019-07-12 | 安徽工业大学 | A kind of photocatalysis fireproof coating and preparation method thereof for degradation of formaldehyde gas |
| CN110003693B (en) * | 2019-04-18 | 2021-01-01 | 安徽工业大学 | Photocatalytic fireproof coating for degrading formaldehyde gas and preparation method thereof |
| CN113562804A (en) * | 2021-08-25 | 2021-10-29 | 上海交通大学 | Method for degrading herbicide by visible light |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100537023C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100537023C (en) | Photocatalyst having response to visible light and preparation thereof | |
| 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 | |
| Zhang et al. | Green recovery of titanium and effective regeneration of TiO2 photocatalysts from spent selective catalytic reduction catalysts | |
| Zhou et al. | Preparation and characterization of polycrystalline bismuth titanate Bi12TiO20 and its photocatalytic properties under visible light irradiation | |
| CN103539210B (en) | A kind of preparation method of cobalt molybdate crystallite | |
| Masaki et al. | Characterization of a new potassium titanate, KTiO2 (OH) synthesized via hydrothermal method | |
| CN105056956B (en) | A kind of visible light-responded iron titanate sodium light catalysis material and its preparation method and application | |
| CN104646001A (en) | Visible-light response type bismuth ferrite-bismuth oxide composite material and preparation method thereof | |
| CN104150533B (en) | The method of anatase titanium dioxide is prepared in the acidolysis of a kind of clean titanium slag | |
| CN104826628A (en) | Preparation method of graphene-iron doped TiO2 nanowire with high catalytic degradation activity under visible light | |
| CN102069001B (en) | Preparation process for preparing photocatalyst from blast furnace slag serving as raw material | |
| CN105536843A (en) | Preparation method of highly visible light electron transfer g-C3N4/ Au/TiO2 Z type photocatalyst | |
| CN102389836B (en) | Polyaniline/titanium dioxide/clay nanometer composite photocatalyst and preparation method thereof | |
| CN106362768B (en) | A kind of honeycomb ceramic plate loads TiO2The preparation technology of the immobilized photochemical catalysts of-NCP | |
| CN106076312B (en) | A kind of Nb (OH)5Nano wire/redox graphene composite photo-catalyst and the preparation method and application thereof | |
| CN107583646A (en) | It is a kind of from useless SCR catalyst Green reclaiming Fe2O3/TiO2The method of photochemical catalyst | |
| CN104785279B (en) | Sulfurized metal oxide/titanium dioxide nanotube photocatalyst, preparation and application | |
| CN113842930A (en) | Green method for improving activity of metal oxide-phosphorus composite catalyst and application | |
| CN103601239A (en) | Preparation method of anatase and brookite mixed crystal TiO2 nanowire | |
| CN101696032B (en) | Method for preparing chromium and nitrogen co-doping nano-titanium dioxide powders | |
| CN100566826C (en) | A kind of method of preparing photocatalytic material by titanic iron ore ore concentrate wet chemical method | |
| CN106861688A (en) | A kind of Graphene Au TiO2The preparation method of multiple elements design nano-tube material | |
| CN101791564A (en) | High-activity TiO2-based photocatalyst and method for preparing same | |
| CN101507921B (en) | Carbon-doped niobium pentaoxide nano-structure visible-light photocatalyst and non-water body low-temperature preparation method thereof | |
| CN107519852A (en) | A kind of method that normal temperature prepares efficient nano titanium dioxide optical catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20101108 |