CN106268803A - A kind of preparation method of the graphene-supported Ag Bi photocatalyst with 40 shape of octahedron - Google Patents
A kind of preparation method of the graphene-supported Ag Bi photocatalyst with 40 shape of octahedron Download PDFInfo
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- CN106268803A CN106268803A CN201610571532.XA CN201610571532A CN106268803A CN 106268803 A CN106268803 A CN 106268803A CN 201610571532 A CN201610571532 A CN 201610571532A CN 106268803 A CN106268803 A CN 106268803A
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 64
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 48
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 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 claims abstract description 26
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims abstract description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000001117 sulphuric acid Substances 0.000 claims abstract description 15
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 15
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 14
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000006396 nitration reaction Methods 0.000 claims abstract description 11
- MTCFGRXMJLQNBG-REOHCLBHSA-N (2S)-2-Amino-3-hydroxypropansäure Chemical compound OC[C@H](N)C(O)=O MTCFGRXMJLQNBG-REOHCLBHSA-N 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 229960004756 ethanol Drugs 0.000 abstract description 5
- 229960000935 dehydrated alcohol Drugs 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 description 10
- 238000006731 degradation reaction Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 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 9
- 229940043267 rhodamine b Drugs 0.000 description 9
- 230000001699 photocatalysis Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- -1 graphite alkene Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003403 water pollutant Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002912 waste gas 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
- B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/681—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with arsenic, antimony or bismuth
-
- 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
-
- 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
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/10—Heat treatment in the presence of water, e.g. steam
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
Abstract
The preparation method of a kind of graphene-supported Ag Bi photocatalyst with 40 shape of octahedron, comprises the following steps: is 1. joined by Graphene in the nitration mixture of concentrated sulphuric acid and concentrated nitric acid, filters after 2 ~ 8 hours, and washing is dried, obtains modified graphene；2. silver nitrate, bismuth nitrate being dissolved in dehydrated alcohol, obtain the mixed solution of silver nitrate and bismuth nitrate, modified graphene step 1. prepared joins in the mixed solution of silver nitrate and bismuth nitrate, and ultrasonic disperse obtains A liquid；3. NaOH is dissolved in 70 ~ 75% ethanol, obtains B liquid；4. under stirring condition, B drop is entered in A liquid, obtain C liquid；5. in C liquid, add CTAB and serine, be transferred to after stirring in reactor, hydro-thermal reaction 2 ~ 4h at 180 ~ 200 DEG C, filter, wash, i.e. obtain the graphene-supported Ag Bi photocatalyst with 40 shape of octahedron after drying.
Description
Technical field
The invention belongs to organic pollutant degradation technique field, be specifically related to a kind of graphene-supported have 48
The preparation method of the Ag-Bi photocatalyst of face bodily form looks.
Background technology
Process the Organic substance in industrial wastewater, waste gas with the method for photocatalytic degradation, attract people's attention in recent years, pass through
Structure and morphology control and doping etc. can be improved the photocatalysis performance of catalyst, grinding at photocatalysis degradation organic contaminant
In studying carefully, metal dispersity and the catalyst dispersion situation in dye solution is all to affect its light degradation dye molecule catalysis activity
Key factor.Nano-photocatalyst material is than general catalysis material major embodiment on the active function promoting light-catalyzed reaction
At two aspects: one is from the point of view of above-mentioned photocatalytic mechanism, and light induced electron and hole are depended in oxidation, the power of reduction
Concentration.Obviously photocatalyst granular size is the least, and total surface area is the biggest, and efficiency of light absorption is the highest, and electronics and hole are moved
The biggest to the probability on surface.Powder graphite alkene is big because of its specific surface area, is increasingly becoming the focus of research so that photocatalysis technology
Application in water treatment field is possibly realized.Since 20 century 70s, utilize metal photocatalysts oxidation water pollutant
Work is paid attention to by people day by day, and its advantage essentially consists in: first, utilizes metal photocatalysts oxidative degradation water pollutant not
The water being same as simple physical method, chemical method and biological method processes, and handling process is simple, non-secondary pollution, processes speed
Spend faster than microbial method；Secondly, metal photocatalysts oxidation can process various inorganic and organic pollution and make its mineralising, is one
Plant oxidation treatment method, it is crucial that Photocatalytic Oxidation is possible with sunlight resource, energy-conservation and pollution-free.
Summary of the invention
It is an object of the invention to provide the graphene-supported tool that a kind of degradation rate to rhodamine B is high, degradation time is short
There is the preparation method of the Ag-Bi photocatalyst of 40 shape of octahedron.
For achieving the above object, the technical solution used in the present invention is: a kind of graphene-supported to have 40 octahedra
The preparation method of the Ag-Bi photocatalyst of pattern, comprises the following steps: 1. Graphene is joined at 85 ~ 100 DEG C concentrated sulphuric acid with
In the nitration mixture of concentrated nitric acid, Graphene and the weight ratio 0.5 ~ 21 of nitration mixture, filter after 2 ~ 8 hours, washing, be dried, obtain modified graphite
Alkene；2. silver nitrate, bismuth nitrate are dissolved in dehydrated alcohol, obtain the mixed solution of silver nitrate and bismuth nitrate, silver nitrate and nitric acid
In the mixed solution of bismuth, the concentration of silver nitrate is 0.3 ~ 1mol/L, and modified graphene step 1. prepared is by solid-to-liquid ratio 1g
20ml ~ 1g 30ml joins in the mixed solution of silver nitrate and bismuth nitrate, and ultrasonic disperse 1 ~ 2h obtains A liquid；3. NaOH is dissolved in
70 ~ 75%(volume fraction) in ethanol, obtain B liquid, in B liquid, the concentration of NaOH is 1.5 ~ 2mol/L；4. by B liquid under stirring condition
Instilling in A liquid, obtain C liquid, wherein, in B liquid, in NaOH Yu A liquid, the mol ratio of silver nitrate is 2 ~ 41；5. add in C liquid
CTAB and serine, be transferred to after stirring in reactor, hydro-thermal reaction 2 ~ 4h at 180 ~ 200 DEG C, filters, washs, is dried
After i.e. obtain the graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron.
Preferably, described step 2. middle silver nitrate, the mol ratio of bismuth nitrate is 1 ~ 31.
Preferably, described step 5. middle CTAB is 1 ~ 1.5 1 with the mass ratio of serine, and the solid-to-liquid ratio of CTAB Yu C liquid is 8
~ 10g 1L.
Preferably, described step 1. middle concentrated sulphuric acid is 2 ~ 41 with the volume ratio of concentrated nitric acid；The concentration of concentrated sulphuric acid is 98wt%,
The concentration of concentrated nitric acid is 69wt%.
The beneficial effect comprise that: by by Ag-Bi photocatalyst on Graphene, it is to avoid common
Ag-Bi photocatalyst size compared with big, dispersibility is poor, shortcoming of easily reuniting；By adding CTAB and serine, anti-in conjunction with hydro-thermal
Answer condition, prepared the Ag-Bi photocatalyst of the higher 40 graphene-supported shape of octahedron of selectivity, by controlling
The ratio of Ag-Bi, this photocatalyst degradation rate to rhodamine B under ultraviolet source demonstrates and is well catalyzed activity, has
It is widely applied prospect.
Accompanying drawing explanation
Fig. 1 is the transmission of the graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron of embodiment 1 preparation
Electromicroscopic photograph；
The XRD figure of the graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron that Fig. 2 is prepared for embodiment 1；
Fig. 3 is that the graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron of embodiment 1 preparation is to rhodamine B
Degradation effect figure；
Fig. 4 is the transmission electron microscope photo of the graphene-supported Ag-Bi photocatalyst of control experiment 1 preparation.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.
Embodiment 1
The preparation method of a kind of graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron, comprises the following steps:
1. Graphene joins at 90 DEG C the nitration mixture of concentrated sulphuric acid and concentrated nitric acid, and (concentrated sulphuric acid is 31 with the volume ratio of concentrated nitric acid, concentrated sulphuric acid
Concentration be 98wt%, the concentration of concentrated nitric acid is 69wt%) in, the weight ratio of Graphene and nitration mixture filtered after 11,5 hours, washed
Wash, be dried, obtain modified graphene；2. silver nitrate, bismuth nitrate (silver nitrate, the mol ratio of bismuth nitrate are 1 1) are dissolved in anhydrous second
In alcohol, obtaining the concentration of silver nitrate in the mixed solution of the mixed solution of silver nitrate and bismuth nitrate, silver nitrate and bismuth nitrate is
0.5mol/L, the mixing that modified graphene step 1. prepared joins silver nitrate and bismuth nitrate by solid-to-liquid ratio 1g 25ml is molten
In liquid, ultrasonic disperse 1h, obtain A liquid；3. being dissolved in 70% ethanol by NaOH, obtain B liquid, in B liquid, the concentration of NaOH is 1.5mol/
L；4. being entered in A liquid by B drop under stirring condition, obtain C liquid, wherein, in B liquid, in NaOH Yu A liquid, the mol ratio of silver nitrate is 4
1；5. (CTAB is 1.2 1 with the mass ratio of serine, and the solid-to-liquid ratio of CTAB with C liquid is to add CTAB and serine in C liquid
8g 1L), it is transferred to after stirring in reactor, hydro-thermal reaction 4h at 200 DEG C, filters, wash, i.e. obtain Graphene after drying
The Ag-Bi photocatalyst with 40 shape of octahedron of load.
Reference examples 1
Reference examples 1 is with the difference of embodiment 1, step 5. in be added without CTAB and serine, C liquid is directly proceeded to instead
Answer in still, hydro-thermal reaction 4h at 200 DEG C, filters, washs, is dried.
Reference examples 1 preparation graphene-supported Ag-Bi photocatalyst as shown in Figure 4, from fig. 4, it can be seen that prepare
Photocatalyst pattern be irregularly shaped.
Embodiment 2
The preparation method of a kind of graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron, comprises the following steps:
1. Graphene joins at 85 ~ 100 DEG C the nitration mixture of concentrated sulphuric acid and concentrated nitric acid, and (concentrated sulphuric acid is 31 with the volume ratio of concentrated nitric acid, dense
The concentration of sulphuric acid is 98wt%, and the concentration of concentrated nitric acid is 69wt%) in, the weight ratio of Graphene and nitration mixture mistake after 21,8 hours
Filter, washing, it is dried, obtains modified graphene；2. silver nitrate, bismuth nitrate (silver nitrate, the mol ratio of bismuth nitrate are 3 1) are dissolved in nothing
In water-ethanol, obtain the concentration of silver nitrate in the mixed solution of the mixed solution of silver nitrate and bismuth nitrate, silver nitrate and bismuth nitrate
For 0.3mol/L, modified graphene step 1. prepared joins the mixing of silver nitrate and bismuth nitrate by solid-to-liquid ratio 1g 20ml
In solution, ultrasonic disperse 1.5h, obtain A liquid；3. being dissolved in 75% ethanol by NaOH, obtain B liquid, in B liquid, the concentration of NaOH is
2mol/L；4. under stirring condition, B drop is entered in A liquid, obtain C liquid, wherein, the mol ratio of silver nitrate in NaOH Yu A liquid in B liquid
It is 21；5. (CTAB is 11 with the mass ratio of serine, and the solid-to-liquid ratio of CTAB with C liquid is to add CTAB and serine in C liquid
8g 1L), it is transferred to after stirring in reactor, hydro-thermal reaction 2h at 180 DEG C, filters, wash, i.e. obtain Graphene after drying
The Ag-Bi photocatalyst with 40 shape of octahedron of load.
Embodiment 3
The preparation method of a kind of graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron, comprises the following steps:
1. Graphene joins at 85 ~ 100 DEG C the nitration mixture of concentrated sulphuric acid and concentrated nitric acid, and (concentrated sulphuric acid is 31 with the volume ratio of concentrated nitric acid, dense
The concentration of sulphuric acid is 98wt%, and the concentration of concentrated nitric acid is 69wt%) in, the weight ratio of Graphene and nitration mixture mistake after 0.5 1,2 hours
Filter, washing, it is dried, obtains modified graphene；2. silver nitrate, bismuth nitrate (silver nitrate, the mol ratio of bismuth nitrate are 2 1) are dissolved in nothing
In water-ethanol, obtain the concentration of silver nitrate in the mixed solution of the mixed solution of silver nitrate and bismuth nitrate, silver nitrate and bismuth nitrate
For 1mol/L, the mixing that modified graphene step 1. prepared joins silver nitrate and bismuth nitrate by solid-to-liquid ratio 1g 30ml is molten
In liquid, ultrasonic disperse 2h, obtain A liquid；3. being dissolved in 70% ethanol by NaOH, obtain B liquid, in B liquid, the concentration of NaOH is 1.5mol/
L；4. being entered in A liquid by B drop under stirring condition, obtain C liquid, wherein, in B liquid, in NaOH with A liquid, the mol ratio of silver nitrate is
2.5 1；5. (CTAB is 1.5 1 with the mass ratio of serine, the solid-to-liquid ratio of CTAB Yu C liquid to add CTAB and serine in C liquid
For 10g 1L), it is transferred to after stirring in reactor, hydro-thermal reaction 4h at 200 DEG C, filters, wash, i.e. obtain graphite after drying
The Ag-Bi photocatalyst with 40 shape of octahedron of alkene load.
Degrading experiment
The graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron of embodiment 1 preparation is at ultraviolet source irradiation
Under as follows to the degradation experiment step of rhodamine B: rhodamine B solution 100mL that concentration is 10mg/L is added photocatalysis instrument
In reaction tube, it is subsequently adding Ag-Bi photocatalyst 0.02g, the ultrasonic disperse 4min prepared through hydro-thermal reaction, static in darkroom
Reach to react adsorption equilibrium after absorption 30min, open ultraviolet source and magnetic stirring apparatus, at interval of 20min in During Illumination
Sampling, takes the supernatant rhodamine B maximum absorption wavelength l=554nm at after centrifugation, use 722N visible spectrophotometric
Meter measures sample absorbance, and passes through formula: DC=[(A0-Ai)/A0] 100% complete the calculating of degradation rate, it is wherein A0For
The absorbance of the rhodamine B solution of 10mg/L, AiThe absorbance of the rhodamine B solution for measuring during timing sampling.At 254nm ripple
Irradiating 2 hours under long ultraviolet light, the degradation rate of rhodamine B is 97.8%.
Claims (4)
1. the preparation method of a graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron, it is characterised in that
Comprise the following steps: 1. Graphene is joined at 85 ~ 100 DEG C concentrated sulphuric acid with in the nitration mixture of concentrated nitric acid, Graphene and nitration mixture
Weight ratio 0.5 ~ 21, filtered after 2 ~ 8 hours, and washing is dried, obtains modified graphene；2. silver nitrate, bismuth nitrate are dissolved in anhydrous
In ethanol, obtaining the concentration of silver nitrate in the mixed solution of the mixed solution of silver nitrate and bismuth nitrate, silver nitrate and bismuth nitrate is
0.3 ~ 1mol/L, modified graphene step 1. prepared joins silver nitrate and nitric acid by solid-to-liquid ratio 1g 20ml ~ 1g 30ml
In the mixed solution of bismuth, ultrasonic disperse 1 ~ 2h, obtain A liquid；3. NaOH is dissolved in 70 ~ 75% ethanol, obtains B liquid, NaOH in B liquid
Concentration be 1.5 ~ 2mol/L；4. under stirring condition, B drop is entered in A liquid, obtain C liquid, wherein, nitre in NaOH Yu A liquid in B liquid
The mol ratio of acid silver is 2 ~ 41；5. in C liquid, add CTAB and serine, be transferred to after stirring in reactor, 180 ~
Hydro-thermal reaction 2 ~ 4h at 200 DEG C, filter, wash, i.e. obtain after drying the graphene-supported Ag with 40 shape of octahedron-
Bi photocatalyst.
The preparation method of the most graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron,
It is characterized in that, step 2. middle silver nitrate, the mol ratio of bismuth nitrate are 1 ~ 31.
The preparation method of the most graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron,
It is characterized in that, described step 5. in the mass ratio of CTAB and serine be 1 ~ 1.5 1, the solid-to-liquid ratio of CTAB Yu C liquid is 8 ~
10g 1L.
The preparation method of the most graphene-supported Ag-Bi photocatalyst with 40 shape of octahedron,
It is characterized in that, described step 1. middle concentrated sulphuric acid is 2 ~ 41 with the volume ratio of concentrated nitric acid.
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Citations (4)
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|---|---|---|---|---|
| CN102615290A (en) * | 2011-12-12 | 2012-08-01 | 湖南理工学院 | Preparation method for Ag/graphene nanometer composite materials |
| CN104096578A (en) * | 2014-07-31 | 2014-10-15 | 安徽工业大学 | Preparation method for an Ag/AgBr/GO nano-composite photocatalyst |
| CN104308169A (en) * | 2014-10-17 | 2015-01-28 | 华东师范大学 | Manufacturing method of concave silver nanoparticles with high-index crystal face |
| CN104587918A (en) * | 2015-01-30 | 2015-05-06 | 河海大学 | Silver nano-particle modified carbon ball/graphene composite aero-gel material as well as preparation method and application of material |
-
2016
- 2016-07-20 CN CN201610571532.XA patent/CN106268803A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615290A (en) * | 2011-12-12 | 2012-08-01 | 湖南理工学院 | Preparation method for Ag/graphene nanometer composite materials |
| CN104096578A (en) * | 2014-07-31 | 2014-10-15 | 安徽工业大学 | Preparation method for an Ag/AgBr/GO nano-composite photocatalyst |
| CN104308169A (en) * | 2014-10-17 | 2015-01-28 | 华东师范大学 | Manufacturing method of concave silver nanoparticles with high-index crystal face |
| CN104587918A (en) * | 2015-01-30 | 2015-05-06 | 河海大学 | Silver nano-particle modified carbon ball/graphene composite aero-gel material as well as preparation method and application of material |
Non-Patent Citations (1)
| Title |
|---|
| ZHANG LEI, ET AL.: "Cu2+-assisted synthesis of hexoctahedral Au-Pd alloy nanocrystals with high-index facets", 《JOURNAL OF THE AMERICAN CHEMICAL SOCIETY》 * |
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