CN103861593A - Chromium-silver co-doped nano TiO2 photo-catalyst, and preparation method and use thereof - Google Patents
Chromium-silver co-doped nano TiO2 photo-catalyst, and preparation method and use thereof Download PDFInfo
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- GHZFPSVXDWJLSD-UHFFFAOYSA-N chromium silver Chemical compound [Cr].[Ag] GHZFPSVXDWJLSD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title abstract description 12
- 239000011941 photocatalyst Substances 0.000 title abstract description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 32
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 229960000583 acetic acid Drugs 0.000 claims abstract description 16
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000012153 distilled water Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000032683 aging Effects 0.000 claims abstract description 6
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000003054 catalyst Substances 0.000 claims description 34
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 31
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 20
- 238000013019 agitation Methods 0.000 claims description 13
- 238000006555 catalytic reaction Methods 0.000 claims description 13
- 239000011651 chromium Substances 0.000 claims description 11
- 238000001354 calcination Methods 0.000 claims description 9
- 230000015556 catabolic process Effects 0.000 claims description 8
- 238000006731 degradation reaction Methods 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910001430 chromium ion Inorganic materials 0.000 claims description 2
- 230000029087 digestion Effects 0.000 claims description 2
- 239000002957 persistent organic pollutant Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 10
- 238000003980 solgel method Methods 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 238000003760 magnetic stirring Methods 0.000 abstract 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 20
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 13
- 229940012189 methyl orange Drugs 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005264 electron capture Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- -1 zeolite compound Chemical class 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses a chromium-silver co-doped nano TiO2 photo-catalyst, and a preparation method and the use thereof. By using a sol-gel method, the preparation method comprises the following steps: (1) adding butyl titanate into absolute ethyl alcohol, dropwise adding glacial acetic acid, and performing magnetic stirring and uniform mixing to obtain a solution A; (2) dissolving silver nitrate which corresponds to titanium particles and has a molar fraction of 0.1-1 percent, and chromic nitrate which has a molar fraction of 0.5-2.5 percent into distilled water, injecting into the absolute ethyl alcohol, dropwise adding the glacial acetic acid and dilute nitric acid, and stirring to obtain a solution B; (3) dropwise adding the solution B into the solution A, and stirring and aging the solutions to form gel; (4) drying the gel to obtain dried gel; and (5) grinding the dried gel into powder, and firing the powder in air at the temperature of 400-700 DEG C to obtain the chromium-silver co-doped nano TiO2 photo-catalyst. A chromium-silver co-doped nano TiO2 photo-catalytic material is fine and uniform in powder granularity, and high in photo-catalytic activity; the average particle size is 10-25nm.
Description
Technical field:
The invention belongs to photocatalysis technology field, particularly a kind of chromium silver co-doped nano TiO
2photochemical catalyst and preparation method thereof.
Background technology:
Titanium dioxide (TiO
2) conduct the most promising catalysis material instantly, in the depollution of environment, sewage disposal, the fields such as organic matter degradation have broad application prospects.Due to TiO
2greater band gap (3.2eV), does not respond visible ray, and light induced electron-hole is high to recombination rate, and quantum efficiency is low, has therefore limited TiO
2promote the use of.
Element doping is to realize nano-TiO
2photochemical catalyst is to visible light-responded a kind of effective means: on the one hand, ion doping can be at TiO
2in forbidden band, introduce impurity energy level and defect level, band gap is narrowed, be beneficial to electronics and transit to conduction band from valence band, thereby by TiO
2spectral response range extend to visible region; On the other hand, doping ion is introduced defect on surface, becomes electron capture center, has suppressed the compound of electron-hole pair, has improved quantum efficiency.The employing coprecipitations such as Yan Junping have been prepared the TiO of Cr doping
2photochemical catalyst, shows: containing transition metal ion Cr
3+expand TiO
2photoresponse scope.Cr
3+substitute TiO
2ti in lattice
4+, in lattice, introduce new energy level and form defect, reduce energy gap, improve the photocatalytic activity of material.Dong Yihui etc. have prepared Ag-TiO
2composite nano fiber, the doping of Ag not only can promote TiO after tested
2transformation from from Anatase to Rutile Type, and appropriate Ag doping can increase substantially TiO
2photocatalytic activity, work as AgNO
3doping while being 1wt%, photocatalytic activity is best.Li Yan etc. have invented a kind of iron and chromium co-doped nano TiO
2/ zeolite compound photocatalyst and method for making thereof (Chinese patent, number of patent application: 201010101536.4), show the nano-TiO of iron and chromium codope
2there is good photocatalytic activity.
Summary of the invention:
The object of the invention is to, a kind of chromium silver co-doped nano TiO is provided
2photochemical catalyst and its production and use.Cr provided by the invention and Ag co-doped nano TiO
2photochemical catalyst is one-dimensional nano structure, has good visible light catalysis activity.
To achieve these goals, the present invention adopts following technical scheme:
A kind of chromium silver co-doped nano TiO
2photochemical catalyst, nano-TiO
2the silver ion of doping molar fraction 0.1%～1% and 0.5%～2.5% chromium ion, Cr
3+replace Ti
4+enter lattice, silver ion is present in grain surface with oxide form.
The present invention further improves and is: nano-TiO
2photochemical catalyst is Detitanium-ore-type.
The present invention further improves and is: the TiO of described chromium silver codope
2photochemical catalyst extends to 580nm at the absorption band edge of visible region.
The present invention further improves and is: the TiO of described chromium silver codope
2photochemical catalyst particle diameter is 10nm～25nm.
A kind of chromium silver co-doped nano TiO
2the preparation method of catalysis material, comprises the following steps:
(1) butyl titanate is added in absolute ethyl alcohol, drip glacial acetic acid, magnetic agitation, to evenly mixing, obtains solution A; In step (1), the volume ratio of butyl titanate, absolute ethyl alcohol, glacial acetic acid is 5:10:1;
(2) silver nitrate and chromic nitrate are dissolved in after distilled water, inject absolute ethyl alcohol, drip glacial acetic acid and rare nitric acid, magnetic agitation, to evenly mixing, obtains solution B; In step (2), the volume ratio of distilled water, absolute ethyl alcohol, glacial acetic acid and rare nitric acid is 1:10:1:1; In step (2), the volume of absolute ethyl alcohol is identical with the volume of absolute ethyl alcohol in step (1); The addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.1～1.0%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5～2.5%;
(3) under stirring condition, solution B is splashed in solution A, after being added dropwise to complete, continue stirring until evenly, then ageing forms gel;
(4) gained gel is dried and within 24～48 hours, obtains xerogel at 60～80 DEG C;
(5) xerogel is milled into powder, then calcination in 400～700 DEG C of air, obtains the TiO of chromium silver codope
2photochemical catalyst.
The present invention further improves and is: in step (2), the concentration of rare nitric acid is 0.1mol/L.
The present invention further improves and is: in step (1), the volume of butyl titanate is 2mL.
The present invention further improves and is: in step (2) addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 1.0%; In step (4), the temperature of calcination is 500 DEG C.
The present invention further improves and is: the digestion time of step (3) is 48 hours; The calcination time of step (4) is 2 hours.
Chromium silver co-doped nano TiO
2photochemical catalyst under visible ray for the application of organic pollutant degradation processing.
With respect to prior art, the present invention has following beneficial effect:
1, the present invention has prepared chromium silver co-doped nano TiO by sol-gel process
2, this photochemical catalyst has good visible absorption performance, can extend to 580nm at the absorption band edge of visible region.
2, the chromium silver co-doped nano TiO that prepared by the present invention
2under visible ray, show excellent photocatalysis performance, exceeded TiO
2industrial products (P25). degraded methyl orange test in, the photochemical catalyst that sample molar fraction is 0.5%Ag-1.0Cr% is most effective, he has exceeded approximately 40% to 3 of methyl orange hours degradation and decolorization rates than P25.
The doping meeting of Cr of the present invention is at TiO
2forbidden band in introduce impurity energy level, reduce energy gap, and expand visible light-responded region, the doping of Ag can effectively suppress the compound of hole-duplet, improves photo-quantum efficiency, and photocatalytic activity is further improved.
Brief description of the drawings
Fig. 1 is chromium silver co-doped nano TiO
2the XRD collection of illustrative plates of powder;
Fig. 2 is chromium silver co-doped nano TiO
2the SEM figure of powder;
Fig. 3 is the absorbance curve map of methyl orange stoste and degraded clear liquid;
Fig. 4 is the degradation rate change curve of methyl orange in Visible Light Induced Photocatalytic process.
Detailed description of the invention
Further illustrate the present invention below in conjunction with embodiment, there is no restriction composition.
Embodiment 1
The invention provides a kind of chromium silver co-doped nano TiO
2the preparation method of photochemical catalyst, adopts sol-gel process, and concrete operating procedure is:
(1) 10mL butyl titanate is added in 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, magnetic agitation obtains solution A to evenly mixing in 30 minutes;
(2) silver nitrate and ferric nitrate are dissolved in after 2mL distilled water, inject 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, the rare nitric acid of 2mL (concentration 0.1mol/L), magnetic agitation obtains solution B to evenly mixing in 25 minutes; The addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.1%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5%;
(3) under intense agitation, solution B is slowly splashed in solution A, be added dropwise to complete rear lasting stirring 20 minutes, ageing 48 hours, forms gel;
(4) gained gel is dried and within 24～48 hours, obtains xerogel at 60～80 DEG C;
(5) xerogel is milled into powder, then calcination in 400 DEG C of air, time 2 h, obtains the nano-TiO of chromium silver codope
2catalysis material.
Embodiment 2
The invention provides a kind of chromium silver co-doped nano TiO
2the preparation method of photochemical catalyst, adopts sol-gel process, and concrete operating procedure is:
(1) 10mL butyl titanate is added in 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, magnetic agitation obtains solution A to evenly mixing in 30 minutes;
(2) silver nitrate and ferric nitrate are dissolved in after 2mL distilled water, inject 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, the rare nitric acid of 2mL (concentration 0.1mol/L), magnetic agitation obtains solution B to evenly mixing in 25 minutes; The addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 1.0%;
(3) under intense agitation, solution B is slowly splashed in solution A, be added dropwise to complete rear lasting stirring 20 minutes, ageing 48 hours, forms gel;
(4) gained gel is dried and within 24～48 hours, obtains xerogel at 60～80 DEG C;
(5) xerogel is milled into powder, then calcination in 500 DEG C of air, time 2 h, obtains the nano-TiO of chromium silver codope
2catalysis material.
In the present embodiment, obtain and under visible ray, there is the chromium element of higher efficiency of light absorption and photocatalytic activity and the nano-TiO of silver element codope
2catalysis material, the nano-TiO of this chromium silver codope
2in photochemical catalyst: the molar fraction of silver element doping is 0.5%, the molar fraction of chromium element is 1.0%.
Fig. 1 is the XRD collection of illustrative plates of embodiment 2 gained samples, can find out, chromium silver co-doped nano TiO prepared by the present invention
2photochemical catalyst is Anatase, has no impurity peaks.Chromium element and silver element do not detect, are because doping reason very little.
Fig. 2 is the SEM collection of illustrative plates of embodiment 2 gained samples, can find out the nano-TiO that the present invention is prepared
2powder crystal grain is very even, the generation of substantially not reuniting, and particle diameter is in 20nm left and right.
Embodiment 3
The invention provides a kind of chromium silver co-doped nano TiO
2the preparation method of photochemical catalyst, adopts sol-gel process, and concrete operating procedure is:
(1) 10mL butyl titanate is added in 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, magnetic agitation obtains solution A to evenly mixing in 30 minutes;
(2) silver nitrate and ferric nitrate are dissolved in after 2mL distilled water, inject 20mL absolute ethyl alcohol, drip 2mL glacial acetic acid, the rare nitric acid of 2mL (concentration 0.1mol/L), magnetic agitation obtains solution B to evenly mixing in 25 minutes; The addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 1.0%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 2.5%;
(3) under intense agitation, solution B is slowly splashed in solution A, be added dropwise to complete rear lasting stirring 20 minutes, ageing 48 hours, forms gel;
(4) gained gel is dried and within 24～48 hours, obtains xerogel at 60～80 DEG C;
(5) xerogel is milled into powder, then calcination in 700 DEG C of air, time 2 h, obtains the nano-TiO of chromium silver codope
2catalysis material.
Chromium silver co-doped nano TiO
2photocatalyst for degrading methyl orange.
Adopt chromium silver co-doped nano TiO
2photochemical catalyst carries out solar irradiation degraded to the methyl orange of 20mg/L, PH=3.
Implementation step:
(1) catalyst puts into by the injected volume of 0.6g/L the methyl orange solution that 100mL concentration is 20mg/L;
(2) degraded light source uses sunshine, and the time is 3 hours noons;
(3) after timing sampling, apply visible light splitting protractor and detect the situation of change of methyl orange in solution;
The degraded check experiment of P25 is identical with above-mentioned steps.
Fig. 3 is the absorbance curve of clear liquid after methyl orange stoste, P25 and embodiment 2 sample degraded methyl oranges.Can find out, the methyl orange solution that this experiment is prepared produces maximum absorption band at 500nm place.Compared with P25, the absorbance of the clear liquid obtaining after the prepared sample degraded of embodiment 2 methyl orange has had significantly decline.
Fig. 4 is under visible ray condition, chromium silver co-doped nano TiO
2the degradation rate timesharing curve map of photochemical catalyst and P25 degraded methyl orange.Chromium in example 2 silver co-doped nano TiO as seen from the figure
2the speed of photocatalyst for degrading methyl orange will, higher than P25, be seen by corresponding period degradation efficiency simultaneously, is also better than P25; The methyl orange degradation efficiency of 3 hours, the chromium silver co-doped nano TiO of example 2
2photochemical catalyst has improved 40% than P25.Can find out from example 2, under visible ray condition, with respect to industrial P25, chromium silver co-doped nano TiO of the present invention
2photochemical catalyst has had significant raising in the degraded speed of methyl orange and efficiency.
Claims (10)
1. a chromium silver co-doped nano TiO
2photochemical catalyst, is characterized in that, nano-TiO
2the silver ion of doping molar fraction 0.1%～1% and 0.5%～2.5% chromium ion, Cr
3+replace Ti
4+enter lattice, silver ion is present in grain surface with oxide form.
2. a kind of chromium silver co-doped nano TiO according to claim 1
2photochemical catalyst, is characterized in that, nano-TiO
2photochemical catalyst is Detitanium-ore-type.
3. a kind of chromium silver co-doped nano TiO according to claim 1
2photochemical catalyst, is characterized in that, the TiO of described chromium silver codope
2photochemical catalyst extends to 580nm at the absorption band edge of visible region.
4. a kind of chromium silver co-doped nano TiO according to claim 1
2photochemical catalyst, is characterized in that, the TiO of described chromium silver codope
2photochemical catalyst particle diameter is 10nm～25nm.
5. a chromium silver co-doped nano TiO
2the preparation method of catalysis material, is characterized in that, comprises the following steps:
(1) butyl titanate is added in absolute ethyl alcohol, drip glacial acetic acid, magnetic agitation, to evenly mixing, obtains solution A; In step (1), the volume ratio of butyl titanate, absolute ethyl alcohol, glacial acetic acid is 5:10:1;
(2) silver nitrate and chromic nitrate are dissolved in after distilled water, inject absolute ethyl alcohol, drip glacial acetic acid and rare nitric acid, magnetic agitation, to evenly mixing, obtains solution B; In step (2), the volume ratio of distilled water, absolute ethyl alcohol, glacial acetic acid and rare nitric acid is 1:10:1:1; In step (2), the volume of absolute ethyl alcohol is identical with the volume of absolute ethyl alcohol in step (1); The addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.1～1.0%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5～2.5%;
(3) under stirring condition, solution B is splashed in solution A, after being added dropwise to complete, continue stirring until evenly, then ageing forms gel;
(4) gained gel is dried and within 24～48 hours, obtains xerogel at 60～80 DEG C;
(5) xerogel is milled into powder, then calcination in 400～700 DEG C of air, obtains the TiO of chromium silver codope
2photochemical catalyst.
6. a kind of chromium silver co-doped nano TiO according to claim 5
2the preparation method of catalysis material, is characterized in that, in step (2), the concentration of rare nitric acid is 0.1mol/L.
7. a kind of chromium silver co-doped nano TiO according to claim 5
2the preparation method of catalysis material, is characterized in that, in step (1), the volume of butyl titanate is 2mL.
8. a kind of chromium silver co-doped nano TiO according to claim 5
2the preparation method of catalysis material, is characterized in that, in step (2) addition of silver nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 0.5%; The addition of ferric nitrate be corresponding titanium particle in step (1) gained solution A molar fraction 1.0%; In step (4), the temperature of calcination is 500 DEG C.
9. a kind of chromium silver co-doped nano TiO according to claim 5
2the preparation method of catalysis material, is characterized in that, the digestion time of step (3) is 48 hours; The calcination time of step (4) is 2 hours.
10. the silver of the chromium described in any one co-doped nano TiO in claim 1 to 4
2chromium silver co-doped nano TiO in photochemical catalyst or claim 5 to 9 described in any one
2the prepared chromium silver co-doped nano TiO of preparation method of catalysis material
2photochemical catalyst under visible ray for the purposes of organic pollutant degradation processing.
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| CN104852032A (en) * | 2015-03-31 | 2015-08-19 | 浙江大学 | Preparation method of silver-loaded titanium dioxide anode material |
| CN107335434A (en) * | 2017-06-15 | 2017-11-10 | 河南科技学院 | A kind of nano-TiO of double pentagonal pyramid cylindricality looks of Fe doping2Photochemical catalyst preparation method |
| CN108452773A (en) * | 2018-03-07 | 2018-08-28 | 南昌航空大学 | A kind of preparation method that can adsorb and detect simultaneously trivalent chromic ion and the nano-functional material with photocatalytic activity |
| CN109876805A (en) * | 2017-12-06 | 2019-06-14 | 天津发洋环保科技有限公司 | A kind of Ag doping TiO2The preparation method of nano photo-catalytic |
| CN113548690A (en) * | 2021-06-09 | 2021-10-26 | 南京工业大学 | Preparation method of light transition metal doped perovskite aerogel material |
| CN116099525A (en) * | 2023-02-20 | 2023-05-12 | 珠海格力电器股份有限公司 | Preparation method of pulse plasma synergistic catalyst, catalyst and application thereof |
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| CN104852032A (en) * | 2015-03-31 | 2015-08-19 | 浙江大学 | Preparation method of silver-loaded titanium dioxide anode material |
| CN107335434A (en) * | 2017-06-15 | 2017-11-10 | 河南科技学院 | A kind of nano-TiO of double pentagonal pyramid cylindricality looks of Fe doping2Photochemical catalyst preparation method |
| CN107335434B (en) * | 2017-06-15 | 2019-07-09 | 河南科技学院 | A kind of nano-TiO of double pentagonal pyramid cylindricality looks of Fe doping2Photochemical catalyst preparation method |
| CN109876805A (en) * | 2017-12-06 | 2019-06-14 | 天津发洋环保科技有限公司 | A kind of Ag doping TiO2The preparation method of nano photo-catalytic |
| CN108452773A (en) * | 2018-03-07 | 2018-08-28 | 南昌航空大学 | A kind of preparation method that can adsorb and detect simultaneously trivalent chromic ion and the nano-functional material with photocatalytic activity |
| CN113548690A (en) * | 2021-06-09 | 2021-10-26 | 南京工业大学 | Preparation method of light transition metal doped perovskite aerogel material |
| CN116099525A (en) * | 2023-02-20 | 2023-05-12 | 珠海格力电器股份有限公司 | Preparation method of pulse plasma synergistic catalyst, catalyst and application thereof |
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