CN108080008A - A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts - Google Patents
A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts Download PDFInfo
- Publication number
- CN108080008A CN108080008A CN201711336105.4A CN201711336105A CN108080008A CN 108080008 A CN108080008 A CN 108080008A CN 201711336105 A CN201711336105 A CN 201711336105A CN 108080008 A CN108080008 A CN 108080008A
- Authority
- CN
- China
- Prior art keywords
- biobr
- agbr
- preparation
- solution
- graphene oxide
- 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.)
- Pending
Links
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 11
- 239000000725 suspension Substances 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 14
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000005457 ice water Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 13
- 230000015556 catabolic process Effects 0.000 abstract description 11
- 238000006731 degradation reaction Methods 0.000 abstract description 11
- 230000001699 photocatalysis Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 238000006555 catalytic reaction Methods 0.000 abstract description 5
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 238000004064 recycling Methods 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 abstract 2
- 229940043267 rhodamine b Drugs 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 22
- 229910002651 NO3 Inorganic materials 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 229910014033 C-OH Inorganic materials 0.000 description 1
- 229910014570 C—OH Inorganic materials 0.000 description 1
- 241001331845 Equus asinus x caballus Species 0.000 description 1
- WTDRDQBEARUVNC-UHFFFAOYSA-N L-Dopa Natural products OC(=O)C(N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- FOQHYNYNHYNUIN-UHFFFAOYSA-N [O].[Br] Chemical compound [O].[Br] FOQHYNYNHYNUIN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- MHUWZNTUIIFHAS-CLFAGFIQSA-N dioleoyl phosphatidic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(COP(O)(O)=O)OC(=O)CCCCCCC\C=C/CCCCCCCC MHUWZNTUIIFHAS-CLFAGFIQSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- -1 graphite alkene Chemical class 0.000 description 1
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229960004502 levodopa Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01J27/08—Halides
-
- 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
-
- 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
- C02F2101/34—Organic compounds containing oxygen
-
- 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
-
- 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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a kind of preparation methods of BiOBr/AgBr/GO Three-element composite photocatalysts, belong to inorganic catalysis material field, the present invention first prepares graphene oxide GO, GO and AgBr are compounded in BiOBr surfaces by a step precipitation method again and form ternary complex, preparation process is simple, it is conveniently operated, possesses good practicability.The present invention forms hetero-junctions and the good electric conductivities of GO by BiOBr and AgBr makes light induced electron quickly move, and inhibits the compound of electron hole pair, so as to which the light for being effectively improved BiOBr urges activity；The Three-element composite photocatalyst 16min of preparation reaches the degradation efficiency of rhodamine B 96%, still reaches 90% to the degradation rate of rhodamine B under the same conditions after 3 recycling uses.The product prepared using the present invention can be widely used for the organic pollution in wastewater by photocatalysis.
Description
Technical field
The present invention relates to a kind of preparation methods of BiOBr/AgBr/GO Three-element composite photocatalysts, belong to inorganic photocatalysis
Field of material technology.
Background technology
Conductor photocatalysis material has apparent advantage for the light degradation of catalysis industry dirt organic pollutants, it has
There is the features such as energy saving, non-secondary pollution, complete pollutant removal.The layer of p-type semiconductor BiOX (BiOX, X=Cl, Br, l)
Shape structure can promote the transfer of photo-generated carrier in photocatalytic process, improve photoelectronic quantum efficiency, and especially BiOBr is suitable
Energy gap makes it higher to the absorptivity of visible ray and has preferable photocatalytic activity.Research shows the O of BiOBr valence band2P
Track lacks the absorption of photon, band gap width 2.91eV, causes BiOBr low to the utilization rate of visible ray.Pass through surface modification
With semiconductors coupling to reduce the compound of hole and electronics, improve BiOBr and visible light utilization efficiency is easily achieved, be the present invention
Purpose.AgBr is a kind of n-type semiconductor, and band gap width is about 2.6eV, visible light absorbing.But AgBr is in light action
Under stability it is poor, and generate electronics, hole-recombination speed is big and makes catalytic effect poor.AgBr and semiconductor BiOBr
It is compound to contribute to the separation of light induced electron and hole and enhance stability.
A variety of oxygen-containing groups (- OH ,-COOH etc.), good electric conductivity and the larger ratio on graphene oxide (GO) surface
Surface area, can effectively inhibit compound, absorption of the increase catalyst to pollutant of light induced electron, hole, and with photochemical catalyst it
Between generate concerted catalysis effect, enhance the photocatalysis performance of catalyst.For this purpose, the present invention propose using BiOBr as base material, using GO as
Coating material, and semiconductor light-catalyst AgBr is compound is prepared Three-element composite photocatalyst BiOBr/AgBr/GO, tool
There is higher photocatalytic activity, and the photochemical catalyst after recycling still has higher catalytic activity.
The existing research being modified using semiconductors coupling to BiOBr, such as " Journal of Catalysis " the 2012nd year
" Unusual reactivity of visible-light-responsive AgBr- in 18th the 116-125 pages of phase
BiOBr heterojunction photocatalysts " (documents 1), first by Bi (NO3)3·5H2O and AgNO3It is dissolved in
In acetic acid, then add in NaBr and composite photo-catalyst is obtained with one step of coprecipitation, this method has the following disadvantages：(1)AgBr
Easily reunite, so that AgBr is uneven in BiOBr Dispersion on surface；(2) AgBr does not show the raising of BiOBr photocatalytic activities
It writes, the composite catalyst forbidden energy gap width being prepared is 2.88eV.BiOBr ternary dopings or the complex light of load in recent years
The research work of catalyst gradually increases, the preparation method of existing BiOBr composite photo-catalysts, such as：“Dalton
" Hierarchical core-shell SiO in the 11451-11458 pages of volume 46 of Transactions " the 2017th2@
PDA@BiOBr microspheres with enhanced visible-light-driven photocatalytic
Performance " (documents 2) prepares SiO with sol-gal process2@PDA, by solvent-thermal method by SiO2@PDA and bromine oxygen
Change bismuth raw material and carry out compound obtained SiO2With PDA (poly- DOPA peace) modification BiOBr composite materials, this method there are it is following not
Foot：(1) catalytic of each component is relatively low, and the RhB that degradation 200mL concentration is 15mg/L takes 100min；(2) solvent heat is used
Method using organic solvent, there is the drawbacks of energy consumption is big, cost is higher.Document " Journal of Alloys and Compounds "
" Preparation of flower-like BiOBr-WO in the 184-192 pages of volume 651 in 20153-Bi2WO6 ternary
It is prepared by hybrid with enhanced visible-light photocatalytic activity " (documents 3)
Method is：With solvent structure WO3-Bi2WO6Binary complex is matrix, using bismuth nitrate and potassium bromide as raw material, adjusts pH
BiOBr-WO is prepared for using coprecipitation3-Bi2WO6Compound photochemical catalyst.This method has the following disadvantages：(1) hydro-thermal method
It is higher to prepare catalyst cost, and preparation process is more numerous and diverse, time-consuming；(2) activity of product is relatively low, and degradation 10mL concentration is
The RhB used time 90min of 10mg/L.
The content of the invention
It is an object of the invention to improve utilization ratio of the BiOBr composite photo-catalysts to visible ray, propose a kind of
The preparation method of BiOBr/AgBr/GO composite photo-catalysts, this method used time is few, easy to operate, BiOBr/AgBr/GO obtained
With strong and visible light catalysis activity and recycle stability.The composite magnetic photochemical catalyst is expected for Industry Waste of degrading
The processing engineering of the organic pollutions such as aromatic heterocyclic dyestuff in water.
The preparation method of BiOBr/AgBr/GO composite photo-catalysts of the present invention is as follows：
(1) graphene oxide dispersion is prepared
Appropriate graphite powder is taken, KMnO is used under the conditions of ice-water bath4Solution and dense H2SO4Oxidation is made graphene oxide GO and hangs
Supernatant liquid.
(2) BiOBr/AgBr/GO composite photo-catalysts are prepared
Take appropriate Bi (NO3)3·5H2O is dissolved in the HNO of 2mol/L3In solution, the NaOH solution of 1mol/L is added in, adjusts pH
For 3~7, according to molar ratio Bi: Ag 100: (1~3) adds in appropriate AgNO3Obtain suspension A；It suspends by graphene oxide
Liquid and Bi (NO3)3·5H2The mass ratio of O is (0.5~2): 100, suitable GO suspension is taken, adds in NaBr solution, ultrasonic 1h
Obtain suspension B；A is slowly dropped in B, in room temperature, be protected from light under the conditions of be stirred to react 4h, be aged 2h, filtering, filter cake is spent
Ion water washing is placed in 80 DEG C of baking oven dry 6h and obtains BiOBr/AgBr/GO composite photo-catalysts to neutrality.
For the ease of comparison, BiOBr, AgBr, BiOBr/AgBr catalyst are prepared for, its preparation method is in step mule (2)
Do not add AgNO3BiOBr is prepared with GO, does not add Bi (NO3)3·5H2O and GO prepares AgBr, does not add GO and prepares BiOBr/
AgBr。
The present invention is mainly had the following effects using above-mentioned technical proposal：
(1) the method for the present invention prepares BiOBr and its compound, without using hydrothermal reaction kettle, Muffle furnace in reaction process
Etc. equipment, it is easy to operate, it is at low cost, it is easy to accomplish industrialized production；
(2) the method for the present invention prepare BiOBr/AgBr/GO composite photo-catalysts be using BiOBr as base material, by with
AgBr is compound and the Surface Modification Effect of GO, provides the conduction bridge of electronics, and composite catalyst forbidden energy gap width is 2.1eV,
Response in visible light region is remarkably reinforced, and absorption maximum edge is by 425nm red shifts to 485nm.
(3) with the composite photo-catalyst for preparing of the present invention, it is catalyzed Visible Light Induced Photocatalytic RhB solution, degradation rate after illumination 16min
Reach 96%, this result is substantially better than the result of documents 1 and documents 2；
(4) stability of composite visible light catalyst prepared by the method for the present invention is good, after circulation and stress 3 times, to RhB
Degradation rate still reach more than 90%.
Description of the drawings
The XRD spectrums of BiOBr, AgBr, GO and BiOBr/AgBr/GO of Fig. 1 synthesis
The xps energy spectrum of Fig. 2 BiOBr/AgBr/GO ternary complexes
The uv-visible absorption spectra of Fig. 3 BiOBr, BiOBr/AgBr and BiOBr/AgBr/GO
The contrast effect of Fig. 4 different catalysts photocatalytic degradations RhB
Specific embodiment
With reference to embodiment, further illustrate the present invention.
Embodiment 1
A kind of preparation method of BiOBr/AgBr/GO composite photo-catalysts, is as follows：
(1) preparation of GO suspension
By 1g graphite powders and 4.5g KMnO4The dense H of 75mL are added under the conditions of ice-water bath2SO4In, 4h is stirred to react, is risen
Temperature is stirred to react 30min to 60 DEG C, adds in 150mL 5%H2SO4, 1h is reacted at 95 DEG C, is cooled to 60 DEG C after reaction,
Add in 25mL H2O2And 2h is reacted with this condition, it is washed to neutrality, obtained with the hydrochloric acid and deionized water that mass fraction is 5%
Graphene oxide suspension.
(2) preparation of BiOBr/AgBr/GO composite photo-catalysts
Weigh 970.0mg Bi (NO3)3·5H2O is dissolved in the HNO of 2mol/L3In solution, the NaOH of 1mol/L is then added in
It is 3 to adjust pH, according to molar ratio Bi: Ag 100: 1, weighs 3.5mg AgNO3It is added in above-mentioned system, dissolving obtains suspended
Liquid A；By graphene oxide suspension and Bi (NO3)3·5H2The mass ratio of O is 0.5: 100, and 5.0mg graphene oxides is taken to suspend
Liquid, adds in 206.0mg NaBr and deionized water, ultrasonic 1h obtain suspension B, A are slowly dropped in B, in room temperature, is protected from light
Under the conditions of be stirred to react 4h, be aged 2h, filtering, filter cake is washed with deionized to neutrality, the dry 6h in 80 DEG C of baking oven, i.e.,
Obtain BiOBr/AgBr/GO composite photo-catalysts.
Embodiment 2
(1) with (1) the step of embodiment 1
(2) by 970.0mgBi (NO3)3·5H2O is dissolved in the HNO of 2mol/L3In solution, the NaOH of 1mol/L is then added in
It is 5 to adjust pH, according to molar ratio Bi: Ag 100: 2, weighs 7.0mg AgNO3It is added in above-mentioned system, dissolving obtains muddiness
Liquid A；By graphene oxide suspension and Bi (NO3)3·5H2The mass ratio of O is 1: 100, takes 10.0mg graphene oxide suspensions
It pours into beaker, adds in 206.0mg NaBr and deionized water, then ultrasound 1h, obtains suspension B.A is slowly dropped to B
In, 4h is stirred to react under the conditions of being protected from light at normal temperatures, afterwards Chen Hua 2h, filtered, it is neutrality to be washed with deionized to pH, then
Dry 6h is placed in 80 DEG C of baking oven to get to BiOBr/AgBr/GO composite photo-catalysts.
Embodiment 3
(1) with (1) the step of embodiment 1
(2) by 970.0mgBi (NO3)3·5H2O is dissolved in the HNO of 2mol/L3In solution, 1mol/L NaOH tune is then added in
It is 7 to save pH, according to molar ratio Bi: Ag 100: 3, weighs 10.5mg AgNO3It is added in above-mentioned system, dissolving obtains muddiness
Liquid A；By graphene oxide suspension and Bi (NO3)3·5H2The mass ratio of O is 2: 100, takes 20.0mg graphene oxide suspensions
It pours into beaker, adds in 206.0mg NaBr and deionized water, then ultrasound 1h, obtains suspension B.A is slowly dropped to B
In, 4h is stirred to react under the conditions of being protected from light at normal temperatures, is aged 2h afterwards, is filtered, it is neutrality to be washed with deionized to pH, then
Dry 6h is placed in 80 DEG C of baking oven to get to BiOBr/AgBr/GO composite photo-catalysts.
Experimental result
The XRD of BiOBr, AgBr, GO that embodiment 2 is prepared and ternary complex spectrums are shown in Fig. 1, diffraction maximum is (001),
(002), (101), (102), (110), (112), (200) (212) and the tetragonal crystal system standard card JCPDS NO.85- of BiOBr
0862 characteristic diffraction peak with it is consistent, show that synthesized BiOBr belongs to tetragonal structure；The characteristic diffraction peak of AgBr is respectively
(111), (200), (220), (222), (400) are consistent with the standard card JCPDS NO.79-0149 of AgBr cubic systems.
Since the content of graphene oxide GO is too low and being dispersed in the surface of solids causes 2 θ of the characteristic signal angle of diffraction of GO to be respectively
28.8 ° and 31.6 ° of diffraction maximum is less also apparent.But subsequent other structures composition test and the work of three component composite catalysts
Property be substantially better than bis- components of BiOBr/AgBr this it is out of question the result shows that, i.e. ternary complex coexists with two components really in GO
It successfully synthesizes.
The x-ray photoelectron spectroscopy XPS such as Fig. 2 for the BiOBr/AgBr/GO catalyst that embodiment 2 is prepared.Fig. 2 (a) displays, sample
Really there are Bi, O, Br, Ag, C element in product.Bi 4f show two very strong peaks in Fig. 2 (b), with reference to can be 164.6eV and
159.2eV, corresponding Bi 4f5/2With Bi 4f7/2Inner electron, energy between two division zones is very poor for 5.4eV, belongs to
The chemical state of trivalent Bi, thus can determine that Bi in BiOBr3+Presence.Ag 3d are there are two peak in Fig. 2 (c), with reference to can be
367.6eV and 373.6eV corresponds to Ag 3d respectively5/2With Ag 3d3/2Inner electron, this shows elements A g in the sample
Valence state is+1.Fig. 2 (d) is C ls spectrograms, and the combination energy of carbon atom different conditions is shown in figure：284.8eV corresponds to sp2Hydridization
In C=C combination energy；286.1eV corresponds to the combination energy of C-O, C-OH；And 288.2eV then corresponds to the combination energy of C=O, shows oxygen
Objectivity existing for graphite alkene GO.In conclusion BiOBr/AgBr/GO has been effectively synthesized.
Fig. 3 is the UV-visible absorption spectrum of BiOBr, BiOBr/AgBr and BiOBr/AgBr/GO, and comparison is single
BiOBr absorption curve, red shift, tri compound has occurred in sample absorption maximum edge after adding in silver bromide and graphene oxide
Catalyst forbidden energy gap width is 2.1eV, this illustrates that it enhances the responding ability of visible ray.
Catalyst BiOBr/AgBr/GO and comparative sample BiOBr, BiOBr/AgBr prepared by embodiment 2 imitates the degradation of RhB
Fruit is as shown in Figure 4.Degrade RhB under the conditions of simulated solar irradiation, and ternary complex has compared with binary complex, simple sample
Apparent to improve, this, which is derived from GO, has superior electronic conductivity, can be effectively facilitated the separation in light induced electron and hole,
So that the activity of p-n heterojunction photochemical catalyst BiOBr-AgBr significantly increases.Test result is, after illumination 16min, the drop of RhB
Solution rate reaches 96%, this result be substantially better than documents 1 and documents 2 as a result, also superior to single BiOBr and
The degradation efficiency of BiOBr/AgBr (degradation rate is respectively 78% and 90%).Three component composite catalysts recycle 3 times
Afterwards, 90% is still reached to the degradation rate of RhB, embodies the excellent stabilization of three component visible light catalysts of this law synthesis
Property.The BiOBr/AgBr/GO visible light catalysts prepared using the present invention have high activity and cyclical stability.
Claims (2)
1. a kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts, it is characterised in that comprise the following steps：
(1) preparation of graphene oxide (GO)：Appropriate graphite powder is taken, KMnO is used under the conditions of ice-water bath4Solution and dense H2SO4Oxygen
Change and graphene oxide (GO) suspension is made；
(2) preparation of BiOBr/AgBr/GO composite photo-catalysts：Take appropriate Bi (NO3)3·5H2O is dissolved in the HNO of 2mol/L3Solution
In, the NaOH solution of 1mol/L is added in, it is 3~7 to adjust pH, according to molar ratio Bi: Ag 100: (1~3) adds in appropriate
AgNO3Obtain suspension A；By graphene oxide and Bi (NO3)3·5H2The mass ratio of O is (0.5~2): 100, take suitable GO
Suspension, adds in NaBr solution, and ultrasonic 1h obtains suspension B；Solution A is slowly dropped in solution B, in room temperature, is protected from light item
4h is stirred to react under part, is aged 2h, filtering is washed with deionized to being 7 close to the i.e. pH of neutrality, is placed in 80 DEG C of baking oven and does
Dry 6h obtains BiOBr/AgBr/GO composite photo-catalysts.
2. the preparation method of BiOBr/AgBr/GO composite photo-catalysts according to claim 1, it is characterised in that step
(2) preparation method used in is simple, and a step obtains three component compounds simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711336105.4A CN108080008A (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711336105.4A CN108080008A (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108080008A true CN108080008A (en) | 2018-05-29 |
Family
ID=62174321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711336105.4A Pending CN108080008A (en) | 2017-12-05 | 2017-12-05 | A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108080008A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759122A (en) * | 2019-03-19 | 2019-05-17 | 辽宁大学 | A kind of bismuth oxybromide ternary heterojunction structure photochemical catalyst and its preparation method and application |
| CN110860300A (en) * | 2019-11-26 | 2020-03-06 | 湘潭大学 | 3DWO3/BiOBr photocatalyst and preparation method and application thereof |
| CN111774072A (en) * | 2020-07-10 | 2020-10-16 | 重庆工程职业技术学院 | Method for preparing carbon-coated magnetic cadmium sulfide composite photocatalyst |
| CN112892608A (en) * | 2021-01-20 | 2021-06-04 | 江苏大学 | Water-stable composite material for photodegradation of organic pollutants and preparation method thereof |
| CN113996318A (en) * | 2021-11-24 | 2022-02-01 | 白银新大孚科技化工有限公司 | Ternary compound Pr-Go-BiOX catalyst and preparation method thereof |
| CN114558595A (en) * | 2022-03-16 | 2022-05-31 | 淮北师范大学 | Visible light catalyst for degrading antibiotic residues |
-
2017
- 2017-12-05 CN CN201711336105.4A patent/CN108080008A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759122A (en) * | 2019-03-19 | 2019-05-17 | 辽宁大学 | A kind of bismuth oxybromide ternary heterojunction structure photochemical catalyst and its preparation method and application |
| CN109759122B (en) * | 2019-03-19 | 2021-06-01 | 辽宁大学 | Bismuth oxybromide ternary heterostructure photocatalyst and preparation method and application thereof |
| CN110860300A (en) * | 2019-11-26 | 2020-03-06 | 湘潭大学 | 3DWO3/BiOBr photocatalyst and preparation method and application thereof |
| CN110860300B (en) * | 2019-11-26 | 2022-09-06 | 湘潭大学 | 3DWO 3 /BiOBr photocatalyst and preparation method and application thereof |
| CN111774072A (en) * | 2020-07-10 | 2020-10-16 | 重庆工程职业技术学院 | Method for preparing carbon-coated magnetic cadmium sulfide composite photocatalyst |
| CN112892608A (en) * | 2021-01-20 | 2021-06-04 | 江苏大学 | Water-stable composite material for photodegradation of organic pollutants and preparation method thereof |
| CN113996318A (en) * | 2021-11-24 | 2022-02-01 | 白银新大孚科技化工有限公司 | Ternary compound Pr-Go-BiOX catalyst and preparation method thereof |
| CN114558595A (en) * | 2022-03-16 | 2022-05-31 | 淮北师范大学 | Visible light catalyst for degrading antibiotic residues |
| CN114558595B (en) * | 2022-03-16 | 2023-08-08 | 淮北师范大学 | Visible light catalyst for degrading antibiotic residues |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108080008A (en) | A kind of preparation method of BiOBr/AgBr/GO Three-element composite photocatalysts | |
| Jiang et al. | Enhanced photocatalytic CO2 reduction via the synergistic effect between Ag and activated carbon in TiO2/AC-Ag ternary composite | |
| Saravanakumar et al. | Construction of novel Pd/CeO2/g-C3N4 nanocomposites as efficient visible-light photocatalysts for hexavalent chromium detoxification | |
| Hasija et al. | Progress on the photocatalytic reduction of hexavalent Cr (VI) using engineered graphitic carbon nitride | |
| Dou et al. | The simultaneous promotion of Cr (VI) photoreduction and tetracycline removal over 3D/2D Cu2O/BiOBr S-scheme nanostructures | |
| Zhang et al. | A novel S-scheme MoS2/CdIn2S4 flower-like heterojunctions with enhanced photocatalytic degradation and H2 evolution activity | |
| Fang et al. | Facile synthesis of anatase/rutile TiO2/g-C3N4 multi-heterostructure for efficient photocatalytic overall water splitting | |
| CN108187700B (en) | Preparation method of silver iodide/plate-shaped bismuth-rich type bismuth oxyiodide composite photocatalytic material | |
| Bi et al. | Direct Z-scheme CoS/g-C3N4 heterojunction with NiS co-catalyst for efficient photocatalytic hydrogen generation | |
| Guo et al. | High-efficiency sono-solar-induced degradation of organic dye by the piezophototronic/photocatalytic coupling effect of FeS/ZnO nanoarrays | |
| CN104801329A (en) | CdS quantum dot/superthin g-C3N4 nanosheet composite photocatalyst and preparation method thereof | |
| CN109174082B (en) | Preparation of BiVO4/MnO2Method for preparing composite photocatalytic oxidant | |
| He et al. | Construction of Schottky-type Ag-loaded fiber-like carbon nitride photocatalysts for tetracycline elimination and hydrogen evolution | |
| CN106824248A (en) | A kind of pattern and the controllable WO of composition3Nanometer sheet/g C3N4The preparation method of nano composite material | |
| CN109395777A (en) | A kind of Three-element composite photocatalyst BiOI@UIO-66 (NH2)@g-C3N4Preparation method | |
| Wang et al. | Persulfate activation of CuS@ Ti3C2-based MXene with Bi-active centers toward Orange II removal under visible light | |
| Piao et al. | Construction of solar light-driven dual Z-scheme Bi2MoO6/Bi2WO6\AgI\Ag photocatalyst for enhanced simultaneous degradation and conversion of nitrogenous organic pollutants | |
| Sun et al. | Uniform Pt quantum dots-decorated porous g-C3N4 nanosheets for efficient separation of electron-hole and enhanced solar-driven photocatalytic performance | |
| CN107552072B (en) | graphene-CuInS2Nano composite photocatalyst | |
| Chen et al. | Construction of Ag decorated P-doped g-C3N4 nanosheets Schottky junction via silver mirror reaction for enhanced photocatalytic activities | |
| Su et al. | Multifunctional MoS2 ultrathin nanoflakes loaded by Cd0. 5Zn0. 5S QDs for enhanced photocatalytic H2 production | |
| CN106622202A (en) | Preparation method of graphene-TiO2 nanotube/FTO double-layer composite film | |
| CN104148094B (en) | A kind of preparation method of bismuth oxyfluoride/Graphene composite visible light catalyst | |
| CN104667950A (en) | Method for preparing graphene-SnIn4S8 nano composite photocatalyst at low temperature by adopting coprecipitation method | |
| CN107433203A (en) | A kind of Z Scheme compound systems and preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180529 |
|
| RJ01 | Rejection of invention patent application after publication |