CN107233904A - A kind of preparation method of siliver chromate/silver bromide compound photocatalyst - Google Patents
A kind of preparation method of siliver chromate/silver bromide compound photocatalyst Download PDFInfo
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- CN107233904A CN107233904A CN201710475825.2A CN201710475825A CN107233904A CN 107233904 A CN107233904 A CN 107233904A CN 201710475825 A CN201710475825 A CN 201710475825A CN 107233904 A CN107233904 A CN 107233904A
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- -1 silver bromide compound Chemical class 0.000 title claims abstract description 7
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 title claims abstract description 5
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims abstract description 54
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 11
- 238000005119 centrifugation Methods 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 9
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 5
- 239000012266 salt solution Substances 0.000 claims abstract description 3
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 11
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- 238000000975 co-precipitation Methods 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 41
- 229940043267 rhodamine b Drugs 0.000 description 41
- 238000003760 magnetic stirring Methods 0.000 description 20
- 239000000243 solution Substances 0.000 description 20
- 238000001228 spectrum Methods 0.000 description 20
- 239000003643 water by type Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 12
- 101710134784 Agnoprotein Proteins 0.000 description 11
- 230000015556 catabolic process Effects 0.000 description 11
- 238000006731 degradation reaction Methods 0.000 description 11
- 239000000975 dye Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011218 binary composite Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 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 1
- 229940012189 methyl orange Drugs 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- LKZMBDSASOBTPN-UHFFFAOYSA-L silver carbonate Substances [Ag].[O-]C([O-])=O LKZMBDSASOBTPN-UHFFFAOYSA-L 0.000 description 1
- 229910000161 silver phosphate Inorganic materials 0.000 description 1
- KQTXIZHBFFWWFW-UHFFFAOYSA-L silver(I) carbonate Inorganic materials [Ag]OC(=O)O[Ag] KQTXIZHBFFWWFW-UHFFFAOYSA-L 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
- B01J27/06—Halogens; Compounds thereof
- B01J27/132—Halogens; Compounds thereof with chromium, molybdenum, tungsten or polonium
-
- B01J35/39—
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/22—Organic substances containing halogen
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/26—Organic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Abstract
The invention discloses a kind of preparation method of siliver chromate/silver bromide compound photocatalyst.Methods described is uses coprecipitation, under lucifuge stirring, by Ag+Soluble salt solution instill CrO dropwise4 2‑And Br‑Alkali metal salt mixed solution in, stirring purifying 20~24h after by pelleting centrifugation washing and drying, be made Ag2CrO4Mol ratio with AgBr is 4:1~1:20 Ag2CrO4/ AgBr composite catalysts.The inventive method is by Ag2CrO4With AgBr homogeneous precipitations, Ag2CrO4With AgBr formation hetero-junctions, suppress photo-generate electron-hole to being combined, significantly improve the catalytic performance of composite photo-catalyst, effective degradable organic pollutant.
Description
Technical field
The invention belongs to photocatalyst technology field, it is related to a kind of Ag2CrO4The preparation method of/AgBr composite photo-catalysts.
Background technology
A series of photochemical catalysts of semiconductor especially argentiferous, such as Ag2CrO4, Ag3PO4, Ag2CO3And AgGaO2With can
See photoresponse.Document 1 (Shuxin Ouyang, et al.Correlation of Crystal Structures,
Electronic Structures,and Photocatalytic Properties in a Series of Ag-based
Oxides:AgAlO2,AgCrO2,and Ag2CrO4[J].J.Phys.Chem.C,2008,112:3134-3141) report
Ag2CrO4Fabulous catalytic decomposition activity is shown under visible light illumination, to the degraded of methyl orange up to 88% in 120min.
But the problem of silverbased compound generally existing photoetch, Ag2CrO4It is no exception, single-phase Ag2CrO4Photochemical catalyst is unstable,
Light induced electron is easily combined with hole in catalytic process, and catalytic cycle is short, and catalytic efficiency is low.Therefore, Ag is improved2CrO4Photochemical catalyst
Stability be development Ag2CrO4The necessary means of photochemical catalyst.
Many researchs pass through the single-phase Ag of contrast that adulterates2CrO4And Ag2CrO4The catalytic activity and stability of based composites,
Obtain certain achievement.(Mahsa Pirhashemi, the et al.ZnO/AgBr/Ag of document 22CrO4nanocomposites
with tandem n-n heterojunctions as novel visible-light-driven photocatalysts
with excellent activity[J].Ceramics International,2015,41:14383-14393) report
ZnO/AgBr/Ag2CrO4Three-element composite photocatalyst, although compound ZnO improves Ag2CrO4The stability of photochemical catalyst, catalysis
The cycle performance of agent preferably, reusable edible 4 times and do not occur photoetch substantially, but its degradation rate is especially slow, wherein
ZnO/AgBr/Ag2CrO4(30%) RhB degradeds preferably, are needed more than 180min by degradation effect completely.Document 3 (Lifang Zhu,
et al.Fabrication of AgBr/Ag2CrO4composites for enhanced visible-light
photocatalytic activity[J].Ceramics International,2015,41:12509-12513.) using sun
Ion-exchange is combined Ag2CrO4Photochemical catalyst is prepared with AgBr, but due to Ag2CrO4It is close with AgBr solubility products, simple sun
Ion exchange composite algorithm can not make Ag2CrO4Combined closely with AgBr formation, it is impossible to effective hetero-junctions is formed, in light reaction
Later stage, because catalyst is greatly reduced reaction rate, and binary catalyst dark reaction made from the method by photoetch
Required time is longer.
The content of the invention
It is an object of the invention to provide the Ag that a kind of technique is simple, photocatalysis efficiency is higher2CrO4/ AgBr complex lights are urged
The preparation method of agent.
To achieve the above object, technical scheme is as follows：
A kind of preparation method of siliver chromate/silver bromide compound photocatalyst, is comprised the following steps that：
Under lucifuge stirring, by Ag+Soluble salt solution instill CrO dropwise4 2-And Br-Alkali metal salt mixed solution in,
Stirring 20~24h of purifying, by pelleting centrifugation washing and drying, obtains Ag2CrO4/ AgBr composite catalysts, wherein, Ag2CrO4With
AgBr mol ratio is 4:1~1:20.
Preferably, described Ag+Soluble salt be selected from AgNO3Or CH3COOAg。
Preferably, described CrO4 2-And Br-Alkali metal be selected from K2CrO4With KBr or Na2CrO4And NaBr.
Preferably, described CrO4 2-Concentration be 0~0.02mol/L, Br-Concentration be 0~0.04mol/L, but do not wrap
Include 0.
Preferably, described Ag2CrO4Mol ratio with AgBr is 1:10~1:20.
Compared with prior art, advantages of the present invention is as follows：
(1) raw material is easy to get, and technique is simple, is prepared by coprecipitation, and without heating, technique is extremely simple, it is easy to operate,
Modulatory character is strong；
(2) AgBr, Ag are introduced using coprecipitation2CrO4With AgBr energy gap (Ag2CrO4Bandedge placement EVB=
2.24eV, ECB=0.47eV；AgBr bandedge placement is EVB=2.54eV, ECB=0.07eV) more match, it can be formed different
Matter junction structure, suppresses photo-generate electron-hole to being combined, significantly improves the catalytic performance of composite photo-catalyst, and effectively degraded has
Organic pollutants, it is seen that under optical condition, 30min can degradable rhodamine B (RhB).
Brief description of the drawings
Fig. 1 is Ag prepared by embodiment 1-52CrO4Ag prepared by/AgBr composite photo-catalysts, comparative example 12CrO4With it is right
AgBr prepared by ratio 2 XRD spectrum.
Fig. 2 is Ag prepared by comparative example 12CrO4(a) Ag prepared with embodiment 32CrO4/ AgBr composite photo-catalysts (b)
SEM (SEM) figure.
Fig. 3 is Ag prepared by embodiment 1-52CrO4Ag prepared by/AgBr composite photo-catalysts, comparative example 12CrO4With it is right
AgBr prepared by ratio 2 UV-Vis DRS (DRS) spectrogram.
Fig. 4 is Ag prepared by embodiment 1-52CrO4Ag prepared by/AgBr composite photo-catalysts, comparative example 12CrO4With it is right
The degradation effect figure of AgBr prepared by ratio 2 to organic dyestuff rhodamine B (RhB).
Fig. 5 is Ag prepared by comparative example 32CrO4Degraded of/AgBr the composite photo-catalysts to organic dyestuff rhodamine B (RhB)
Design sketch.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The Ag of the present invention2CrO4/ AgBr composite photo-catalysts, its nominal component is Ag2CrO4/AgBr(x:1), x is represented
Ag2CrO4Mol ratio.
Embodiment 1
The Ag of the present embodiment2CrO4/AgBr(x:1) binary composite photo-catalyst, wherein x=4, specific preparation process are as follows：
A) 4/45mmol K are weighed2CrO4With 1/45mmol KBr, it is dissolved in 50mL deionized waters, is placed in magnetic stirring apparatus
On be stirred at room temperature until its be completely dissolved.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Continue to be placed in room temperature lucifuge on magnetic stirring apparatus with KBr mixed solutions to stir, AgNO is added dropwise3
Solution, then lucifuge stirring purifies 24h at room temperature.By pelleting centrifugation washing and drying, Ag is obtained2CrO4/AgBr(4:1) binary
Composite sample.
As shown in figure 1, its XRD spectrum and Ag2CrO4XRD spectrum contrast, it can be seen that Ag2CrO4, AgBr feature
Peak, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can responding to visible light.It is to organic dyestuff rhodamine
B (RhB) degradation effect figure as shown in figure 4,120min to the degraded of rhodamine B (RhB) up to 80%.
Embodiment 2
The Ag of the present embodiment2CrO4/AgBr(x:1) composite photo-catalyst, wherein x=2, specific preparation process are as follows：
A) 1/25mmol K are weighed2CrO4With 1/50mmol KBr, it is dissolved in 50mL deionized waters, is placed in magnetic stirring apparatus
On be stirred at room temperature until its be completely dissolved.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Continue to be placed in room temperature lucifuge on magnetic stirring apparatus with KBr mixed solutions to stir, AgNO is added dropwise3
Solution, then lucifuge stirring purifies 24h at room temperature.By pelleting centrifugation washing and drying, Ag is obtained2CrO4/AgBr(2:1) binary
Composite sample.
As shown in figure 1, its XRD spectrum and Ag2CrO4XRD spectrum contrast, it can be seen that Ag2CrO4, AgBr feature
Peak, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can responding to visible light.It is to organic dyestuff rhodamine
B (RhB) degradation effect figure as shown in figure 4,60min to the degraded of rhodamine B (RhB) up to 80%.
Embodiment 3
The Ag of the present embodiment2CrO4/AgBr(x:1) composite photo-catalyst, wherein x=1, specific preparation process are as follows：
A) 1/15mmol K are weighed2CrO4With 1/15mmol KBr, it is dissolved in 50mL deionized waters, is placed in magnetic stirring apparatus
On be stirred at room temperature until its be completely dissolved.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Continue to be placed in room temperature lucifuge on magnetic stirring apparatus with KBr mixed solutions to stir, AgNO is added dropwise3
Solution, then lucifuge stirring purifies 24h at room temperature.By pelleting centrifugation washing and drying, Ag is obtained2CrO4/AgBr(1:1) binary
Composite sample.
As shown in figure 1, its XRD spectrum and Ag2CrO4XRD spectrum contrast, it can be seen that Ag2CrO4, AgBr feature
Peak, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can responding to visible light.It is to organic dyestuff rhodamine
B (RhB) degradation effect figure as shown in figure 4,60min to the degraded of rhodamine B (RhB) up to 90%.
Embodiment 4
The Ag of the present embodiment2CrO4/AgBr(x:1) composite photo-catalyst, wherein x=0.1, specific preparation process are as follows：
A) 1/60mmol K are weighed2CrO4With 1/6mmol KBr, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus
It is stirred at room temperature until it is completely dissolved.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Continue to be placed in room temperature lucifuge on magnetic stirring apparatus with KBr mixed solutions to stir, AgNO is added dropwise3
Solution, then lucifuge stirring purifies 24h at room temperature.By pelleting centrifugation washing and drying, Ag is obtained2CrO4/AgBr(1:10) binary
Composite sample.
As shown in figure 1, its XRD spectrum and Ag2CrO4XRD spectrum contrast, it can be seen that Ag2CrO4, AgBr feature
Peak, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can responding to visible light.It is to organic dyestuff rhodamine
B (RhB) degradation effect figure as shown in figure 4,30min to the degraded of rhodamine B (RhB) up to 85%.
Embodiment 5
The Ag of the present embodiment2CrO4/AgBr(x:1) composite photo-catalyst, wherein x=0.05, specific preparation process are as follows：
A) 1/110mmol K are weighed2CrO4With 2/11mmol KBr, it is dissolved in 50mL deionized waters, is placed in magnetic stirring apparatus
On be stirred at room temperature until its be completely dissolved.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Continue to be placed in room temperature lucifuge on magnetic stirring apparatus with KBr mixed solutions to stir, AgNO is added dropwise3
Solution, then lucifuge stirring purifies 24h at room temperature.By pelleting centrifugation washing and drying, Ag is obtained2CrO4/AgBr(1:20) binary
Composite sample.
As shown in figure 1, its XRD spectrum and Ag2CrO4XRD spectrum contrast, it can be seen that Ag2CrO4, AgBr feature
Peak, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can responding to visible light.It is to organic dyestuff rhodamine
B (RhB) degradation effect figure as shown in figure 4,30min to the degraded of rhodamine B (RhB) up to 93%.
Comparative example 1
Ag2CrO4Preparation
Weigh 0.1mmol K2CrO4, add 50mL deionized waters dissolve it settled solution A.Weigh 0.2mmol
AgNO3It is dissolved in 50mL deionized waters and obtains solution B.Solution B is added dropwise in solution A, room temperature lucifuge stirring 24h, centrifuge washing
Drying precipitation, produces rufous pure phase Ag2CrO4Sample.
Its XRD spectrum is as shown in figure 1, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 700nm, can respond
Visible ray.Its degradation effect figure to organic dyestuff rhodamine B (RhB) is as shown in figure 4,180min is to rhodamine B (RhB) drop
Solution is up to 53%.
Comparative example 2
AgBr preparation
Weigh 0.2mmol KBr, add 50mL deionized waters dissolve it settled solution A.Weigh 0.2mmol AgNO3
It is dissolved in 50mL deionized waters and obtains solution B.Solution B is added dropwise in solution A, after room temperature lucifuge stirring 24h, centrifuge washing drying
Precipitation, produces pistac pure phase AgBr samples.
Its XRD spectrum is as shown in figure 1, its DRS spectrum is as shown in Figure 3, it is seen that it absorbs limit about at 500nm, can respond
Visible ray.Its degradation effect figure to organic dyestuff rhodamine B (RhB) is as shown in figure 4,120min is to rhodamine B (RhB) drop
Solution is up to 78%.
Comparative example 3
Base exchange method prepares Ag2CrO4/ AgBr composite photo-catalysts.
The Ag of this comparative example2CrO4/AgBr(x:1) binary composite photo-catalyst, wherein x=2, specific preparation process are as follows：
A) 0.08mmol K are weighed2CrO4, be dissolved in 50mL deionized waters, be placed on magnetic stirring apparatus be stirred at room temperature until
It is completely dissolved, and weighs 0.04mmol KBr, is dissolved in 50mL deionized waters, is placed on another magnetic stirring apparatus and is stirred at room temperature directly
It is completely dissolved to it.
B) 0.2mmol AgNO are weighed3, it is dissolved in 50mL deionized waters, is placed on magnetic stirring apparatus and is stirred at room temperature up to it
It is completely dissolved.
C) by K2CrO4Solution continues to be placed in room temperature lucifuge on magnetic stirring apparatus and stirred, and 40mL steps b) is added dropwise and obtains
AgNO3Solution, when there is Ag2CrO4During precipitation, then by remaining 10mLAgNO3In solution instillation system, then at room temperature
Lucifuge stirs 3h.
D) continue to be placed in room temperature lucifuge on magnetic stirring apparatus by the obtained mixed solutions of step c) to stir, step is added dropwise
A) the KBr solution obtained, and lucifuge stirring 1h, by pelleting centrifugation washing and drying, obtain Ag2CrO4/AgBr(2:1) binary is combined
Sample.
Its degradation effect figure to organic dyestuff rhodamine B (RhB) is as shown in figure 5,90min is to rhodamine B (RhB) drop
Solution is up to 70%.And use coprecipitation, as shown in figure 4,90min to the degraded of rhodamine B (RhB) up to 80%, illustrate the present invention
The Ag prepared using coprecipitation2CrO4The catalytic efficiency of/AgBr composite photo-catalysts is prepared better than base exchange method
Ag2CrO4/ AgBr composite photo-catalysts.
Claims (5)
1. a kind of preparation method of siliver chromate/silver bromide compound photocatalyst, it is characterised in that comprise the following steps that：
Under lucifuge stirring, by Ag+Soluble salt solution instill CrO dropwise4 2-And Br-Alkali metal salt mixed solution in, stirring
20~24h is purified, by pelleting centrifugation washing and drying, Ag is obtained2CrO4/ AgBr composite catalysts, wherein, Ag2CrO4With AgBr's
Mol ratio is 4:1~1:20.
2. preparation method according to claim 1, it is characterised in that described Ag+Soluble salt be selected from AgNO3Or
CH3COOAg。
3. preparation method according to claim 1, it is characterised in that described CrO4 2-And Br-Alkali metal be selected from
K2CrO4With KBr or Na2CrO4And NaBr.
4. preparation method according to claim 1, it is characterised in that described CrO4 2-Concentration be 0~0.02mol/L,
Br-Concentration be 0~0.04mol/L, but include 0.
5. preparation method according to claim 1, it is characterised in that described Ag2CrO4Mol ratio with AgBr is 1:10
~1:20.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109126836A (en) * | 2018-09-28 | 2019-01-04 | 陕西科技大学 | A kind of preparation method of silver bromide/siliver chromate n-n heterojunction composite photocatalyst |
| CN110560101A (en) * | 2019-08-16 | 2019-12-13 | 南京理工大学 | one-step synthesis of Z-Scheme AgBr/beta-Ag2WO4Method for preparing photocatalyst |
| CN110560100A (en) * | 2019-08-16 | 2019-12-13 | 南京理工大学 | Z-Scheme AgBr/Ag8W4O16Method for synthesizing photocatalyst |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126836A (en) * | 2018-09-28 | 2019-01-04 | 陕西科技大学 | A kind of preparation method of silver bromide/siliver chromate n-n heterojunction composite photocatalyst |
| CN110560101A (en) * | 2019-08-16 | 2019-12-13 | 南京理工大学 | one-step synthesis of Z-Scheme AgBr/beta-Ag2WO4Method for preparing photocatalyst |
| CN110560100A (en) * | 2019-08-16 | 2019-12-13 | 南京理工大学 | Z-Scheme AgBr/Ag8W4O16Method for synthesizing photocatalyst |
| CN110560100B (en) * | 2019-08-16 | 2022-11-18 | 南京理工大学 | Z-Scheme AgBr/Ag 8 W 4 O 16 Method for synthesizing photocatalyst |
| CN110560101B (en) * | 2019-08-16 | 2022-12-02 | 南京理工大学 | One-step synthesis of Z-Scheme AgBr/beta-Ag 2 WO 4 Method for preparing photocatalyst |
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| CN107233904B (en) | 2020-04-21 |
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