CN106391091A - Visible-light responsible photocatalyst and preparation method thereof - Google Patents
Visible-light responsible photocatalyst and preparation method thereof Download PDFInfo
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- CN106391091A CN106391091A CN201610994126.4A CN201610994126A CN106391091A CN 106391091 A CN106391091 A CN 106391091A CN 201610994126 A CN201610994126 A CN 201610994126A CN 106391091 A CN106391091 A CN 106391091A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000011941 photocatalyst Substances 0.000 title abstract description 6
- 238000000498 ball milling Methods 0.000 claims abstract description 42
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003054 catalyst Substances 0.000 claims abstract description 32
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004202 carbamide Substances 0.000 claims abstract description 22
- 230000001699 photocatalysis Effects 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000007146 photocatalysis Methods 0.000 claims description 16
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000000713 high-energy ball milling Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
- 229960000907 methylthioninium chloride Drugs 0.000 description 5
- -1 Methylene Chemical group 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 4
- 238000001073 sample cooling Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000002336 sorption--desorption measurement Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Classifications
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- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/802—Visible light
-
- 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
- C02F2101/36—Organic compounds containing halogen
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- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2101/40—Organic compounds containing sulfur
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
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Abstract
The invention discloses visible-light responsible photocatalyst and a preparation method thereof. The preparation method includes the steps of 1), evenly mixing raw materials of titanium oxide with urea, pouring a ball-milling pot, performing ball milling on the mixed raw materials and setting speed of ball milling to be 100-400r/min and time of ball milling to be 12-48 hours; 2), after ball milling is completed, heating powder in the ball-milling pot at high temperature to obtain the visible-light responsible photocatalyst. Under the technology condition, possible conversion of anatase phase into rutile phase of P25 does not occur during high-energy ball milling, high photocatalytic activity of the prepared catalyst is guaranteed, and problems that existing visible-light responsible TiO2 photocatalyst is complex in technology and high in cost in the prior art are sovled.
Description
Technical field
The present invention relates to a kind of photochemical catalyst and preparation method thereof, particularly to a kind of, there is visible light-responded photocatalysis
Agent and preparation method thereof.
Background technology
From TiO in 19722Since Single Crystalline Electrodes light decomposition water is reported, multiphase photocatalysis hydrogen production by water decomposition was once once alive
Start upsurge in the range of boundary although making slow progress because hydrogen yield is excessively low, but exploration in this respect never has and interrupts.
In terms of Recalcitrant chemicals in removing various surrounding mediums, conductor photocatalysis show strong oxidizing property, pollutant mineralising
Completely, the advantages of directly can utilize sunshine, achieves greater advance in recent years.People give this to the pay attention to day by day of environmental problem
The research of aspect with very big power, the such as environmental problem such as persistence organic pollutant and incretion interferent, the proposition of concept, all
Become the point of penetration of multiphase photocatalysis research.Additionally, multiphase photocatalysis are in the side such as health care, noble metal recovery, chemical synthesis
The application in face has also demonstrated the brilliance.
Multiphase photocatalysis study more, active higher TiO at present2, and the semiconductor material with wide forbidden band such as ZnO, be only capable of by
Ultraviolet light is excited, in addition in order to pursue the high activity of nano-scale photocatalyst, catalyst (the powder or film) light prepared
Often because of quantum size effect, further blue shift is old to absorb band edge, and the solar radiation energy being actually reached earth's surface concentrates on
460-500nm wave-length coverage, how ultraviolet component (300-400nm), less than 5%, therefore efficiently carries out light using natural light and urges
Change reaction, exploitation just increasingly can be aroused people's interest by the photochemical catalyst of excited by visible light.Either expand existing light to urge
The light abstraction width of agent, or exploitation novel photocatalyst, its theory significance is also self-evident.
The preparation method that prior art has visible light-responded photochemical catalyst is with tetraethyl orthosilicate as raw material, using molten
Glue-gel method prepares SiO2Colloidal sol, by TiO2Powder is immersed in SiO2A period of time in colloidal sol, then through being sintered into SiO2/TiO2Multiple
Close powder, after the composite powder obtaining and urea are mixed in proportion, on high energy ball mill, carry out mechanical ball mill, and by ball milling
The mixed powder obtaining is heat-treated in 400-500 DEG C of air, finally gives flaxen titanium dioxide powder catalysis
Agent, but this complex technical process, high cost.The problems referred to above are urgently to be resolved hurrily.
Content of the invention
Present invention offer is a kind of to have visible light-responded photochemical catalyst and preparation method thereof, solves prior art preparation
Visible light-responded TiO2Photochemical catalyst complex process, the problem of high cost.
In order to achieve the above object, the present invention is achieved by the following technical solutions：
The present invention provides a kind of preparation method with visible light-responded photochemical catalyst, comprises the following steps：(1) will be former
Material titanium dioxide is mixed with urea, pours in ball grinder, and mixed raw material is carried out with ball milling, and setting rotational speed of ball-mill is
100-400r/min, setting Ball-milling Time is 12-48h；(2) after ball milling terminates, the powder in ball grinder is carried out high temperature and adds
Heat, you can obtain that there is visible light-responded photochemical catalyst.
Preferably, in described step (1), raw material titanium dioxide and the mass ratio of urea are 1:1-1:10.
Preferably, in described step (2) after ball milling terminates, the powder in ball grinder is transferred in porcelain crucible, and puts
Enter and in Muffle furnace, carry out high-temperature heating.
Preferably, the heating-up temperature of Muffle furnace is set to 300-600 DEG C, and heats 1-5h at this temperature.
The present invention also provides a kind of has visible light-responded photocatalysis by what preparation method described above prepared
Agent.
The present invention also provides a kind of application with visible light-responded photochemical catalyst described above, described have visible
The photochemical catalyst of photoresponse is in the multiphase photocatalysis of catalytic reaction under visible light.
Described have visible light-responded photochemical catalyst for the pollutant in catalytic degradation air under visible light or water.
Advantages of the present invention and having the beneficial effects that：The present invention mixes with urea to titanium dioxide P25 (hereinafter referred to as P25)
Compound carries out ball-milling treatment, and the first step passes through to control rotating speed and the time of ball milling, realizes the decrystallized of P25 surface；Second step will
Titanium dioxide after ball milling is placed in Muffle furnace with urea and heats at a certain temperature, and urea starts to decompose, decrystallized
P25 surface is beneficial to urea and decomposes the decrystallized surface that the carbon doping producing enters P25, and then effectively improves P25
Can be by photocatalysis efficiency；Urea also can form the new composition with photocatalytic activity in thermal decomposition simultaneously：C3N4,C3N4With
P25 is combined, and can improve P25 photocatalysis efficiency further.
Do not occur under the conditions of present invention process P25 in Process During High Energy Ball Milling it may happen that Anatase to golden red
The transformation of stone phase, it is ensured that prepared catalyst has higher photocatalytic activity, solves the visible of prior art preparation
The TiO of photoresponse2Photochemical catalyst complex process, the problem of high cost.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, also may be used
So that other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is P25 and embodiment of the present invention 1-4 sample catalytic degradation dyestuff effect contrast figure.
Fig. 2 is the P25X x ray diffraction schematic diagram before milled sample of the present invention and ball milling.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is further described.Following examples are only
For clearly technical scheme being described, and can not be limited the scope of the invention with this.
The present invention is a kind of preparation method with visible light-responded photochemical catalyst, comprises the following steps：(1) by raw material
Titanium dioxide is mixed with urea, pours in ball grinder, and mixed raw material is carried out with ball milling, and setting rotational speed of ball-mill is 100-
400r/min, setting Ball-milling Time is 12-48h, and raw material titanium dioxide is 1 with the mass ratio of both urea:1-1:10；(2) treat
After ball milling terminates, the powder in ball grinder is transferred in porcelain crucible, and puts into and carry out high-temperature heating in Muffle furnace, by Muffle furnace
Heating-up temperature be set to 300-600 DEG C, and at this temperature heat 1-5h, you can obtain that there is visible light-responded photocatalysis
Agent.
Embodiment 1
Weigh 5gP25 and 15g urea respectively, two kinds of raw materials are poured in ball grinder, subsequently setting rotational speed of ball-mill is 400r/
Min, setting Ball-milling Time is 24h, and the ball milling parameter according to setting carries out ball milling to mixed raw material；After ball milling terminates,
Powder in ball grinder is transferred in porcelain crucible, and puts in Muffle furnace, heating-up temperature is set to 550 DEG C, and here temperature
Degree is lower to heat 2h.
After sample cooling, a certain amount of prepared catalyst is poured in colorimetric cylinder, and drips two concentration and be
0.02mmol·L-1Methylene blue solution, after lucifuge stirring 60min makes to reach adsorption desorption balance, with halogen tungsten lamp, (500W is used in combination
Specific glass filtration ultraviolet light) carry out illumination for light source, every 60min sampling, centrifugation, take supernatant, divided with ultraviolet
Light photometer mensuration absorbance respectively.Photocatalytic degradation of methylene blue result is as shown in Figure 1.
Embodiment 2
Weigh 8gP25 and 8g urea respectively, two kinds of raw materials are poured in ball grinder, subsequently setting rotational speed of ball-mill is 300r/
Min, setting Ball-milling Time is 36h, and the ball milling parameter according to setting carries out ball milling to mixed raw material；After ball milling terminates,
Powder in ball grinder is transferred in porcelain crucible, and puts in Muffle furnace, heating-up temperature is set to 350 DEG C, and here temperature
Degree is lower to heat 5h.
After sample cooling, a certain amount of prepared catalyst is poured in colorimetric cylinder, and drips two concentration and be
0.02mmol·L-1Methyl blue solution, after lucifuge stirring 60min makes to reach adsorption desorption balance, with halogen tungsten lamp (500W, and with spy
Fixed glass filtration ultraviolet light) carry out illumination for light source, every 60min sampling, centrifugation, take supernatant, use ultraviolet spectrometry
Photometer mensuration absorbance respectively.Photocatalytic degradation of methylene blue result is as shown in Figure 1.
Embodiment 3
Weigh 3gP25 and 23g urea respectively, two kinds of raw materials are poured in ball grinder, subsequently setting rotational speed of ball-mill is 250r/
Min, setting Ball-milling Time is 36h, and the ball milling parameter according to setting carries out ball milling to mixed raw material；After ball milling terminates,
Powder in ball grinder is transferred in porcelain crucible, and puts in Muffle furnace, heating-up temperature is set to 500 DEG C, in this temperature
Lower heating 3h.
After sample cooling, a certain amount of prepared catalyst is poured in colorimetric cylinder, and drips two concentration and be
0.02mmol·L-1Methylene blue solution, after lucifuge stirring 60min makes to reach adsorption desorption balance, with halogen tungsten lamp, (500W is used in combination
Specific glass filtration ultraviolet light) carry out illumination for light source, every 60min sampling, centrifugation, take supernatant, divided with ultraviolet
Light photometer mensuration absorbance respectively.Photocatalytic degradation of methylene blue result is as shown in Figure 1.
Embodiment 4
Weigh 6gP25 and 14g urea respectively, two kinds of raw materials are poured in ball grinder, subsequently setting rotational speed of ball-mill is 150r/
Min, setting Ball-milling Time is 36h, and the ball milling parameter according to setting carries out ball milling to mixed raw material；After ball milling terminates,
Powder in ball grinder is transferred in porcelain crucible, and puts in Muffle furnace, heating-up temperature is set to 450 DEG C, in this temperature
Lower heating 4h.
After sample cooling, a certain amount of prepared catalyst is poured in colorimetric cylinder, and drips two concentration and be
0.02mmol·L-1Methylene blue solution, after lucifuge stirring 60min makes to reach adsorption desorption balance, with halogen tungsten lamp, (500W is used in combination
Specific glass filtration ultraviolet light) carry out illumination for light source, every 60min sampling, centrifugation, take supernatant, divided with ultraviolet
Light photometer mensuration absorbance respectively.Photocatalytic degradation of methylene blue result is as shown in Figure 1.
As can be seen from the above results, the photochemical catalyst of embodiment 4 preparation has preferable photocatalysis efficiency, and illumination 2 is little
When, the degradation rate of methylene blue has exceeded 80%.
P25 (grey) X-ray diffraction schematic diagram before embodiment of the present invention sample (black) and ball milling is as shown in Fig. 2 ball
After mill, the diffraction maximum of sharp titanium phase substantially weakens, and illustrates that the surface of titanium oxide has part decrystallized, the spreading out of Rutile Type simultaneously
Penetrate peak not strengthen, illustrate that the content of rutile in this process does not increase.
Do not occur under the conditions of present invention process P25 in Process During High Energy Ball Milling it may happen that Anatase to golden red
The transformation of stone phase, it is ensured that prepared catalyst has higher photocatalytic activity, solves the visible of prior art preparation
The TiO of photoresponse2Photochemical catalyst complex process, the problem of high cost.With the mixture of urea, ball milling is carried out to titanium dioxide P25
Process, the first step passes through to control rotating speed and the time of ball milling, realizes the decrystallized of P25 surface；Second step is by the dioxy after ball milling
Change titanium is placed in Muffle furnace with urea and heats at a certain temperature, and urea starts to decompose, and decrystallized P25 surface will be favourable
Decompose, in urea, the decrystallized surface that the carbon doping producing enters P25, and then effectively improve photocatalysis being imitated of P25
Rate；Urea also can form the new composition with photocatalytic activity in thermal decomposition simultaneously：C3N4, C3N4It is combined with P25, Neng Goujin
One step improves P25 photocatalysis efficiency.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of preparation method with visible light-responded photochemical catalyst is it is characterised in that comprise the following steps：(1) will be former
Material titanium dioxide is mixed with urea, pours in ball grinder, and mixed raw material is carried out with ball milling, and setting rotational speed of ball-mill is
100-400r/min, setting Ball-milling Time is 12-48h；(2) after ball milling terminates, the powder in ball grinder is carried out high temperature and adds
Heat, you can obtain that there is visible light-responded photochemical catalyst.
2. a kind of preparation method with visible light-responded photochemical catalyst according to claim 1 is it is characterised in that institute
Stating raw material titanium dioxide and the mass ratio of both urea in step (1) is 1:1-1:10.
3. a kind of preparation method with visible light-responded photochemical catalyst according to claim 1 and 2, its feature exists
In, in described step (2) after ball milling terminates, the powder in ball grinder being transferred in porcelain crucible, and puts in Muffle furnace
Row high-temperature heating.
4. a kind of preparation method with visible light-responded photochemical catalyst according to claim 3 is it is characterised in that incite somebody to action
The heating-up temperature of Muffle furnace is set to 300-600 DEG C, and heats 1-5h at this temperature.
5. what a kind of preparation method any one of claim 1-4 prepared has visible light-responded photocatalysis
Agent.
6. the application with visible light-responded photochemical catalyst described in a kind of claim 5 it is characterised in that：It is described that have can
The photochemical catalyst seeing photoresponse is in the multiphase photocatalysis of catalytic reaction under visible light.
7. the application with visible light-responded photochemical catalyst according to claim 6 it is characterised in that：It is described that have can
The photochemical catalyst seeing photoresponse is for the pollutant in catalytic degradation air under visible light or water.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159292A (en) * | 2017-05-10 | 2017-09-15 | 大连海事大学 | A kind of AlON composite visible light catalysts and its preparation method and application |
| CN110639594A (en) * | 2019-10-22 | 2020-01-03 | 湖南东展科技发展有限公司 | Preparation method of nano titanium dioxide/graphite phase carbon nitride composite photocatalyst |
| CN112679169A (en) * | 2021-02-03 | 2021-04-20 | 西南大学 | Composite photocatalytic pervious concrete and preparation method thereof |
| CN113003651A (en) * | 2021-03-17 | 2021-06-22 | 东北大学 | Method for catalytic degradation of thiocyanate radicals in wastewater by visible light |
| CN113929197A (en) * | 2021-09-23 | 2022-01-14 | 重庆大学 | Method for treating organic wastewater by activating peroxymonosulfate under assistance of visible light |
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