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Preparation method of bismuth vanadate/graphene composite photocatalyst with controllable particle size

A graphene composite and photocatalyst technology, applied in the field of preparation of bismuth vanadate nanoparticles/graphene composite photocatalyst, can solve problems such as low photo-generated electron-hole separation efficiency, and achieve the effect of excellent catalytic performance

Active Publication Date: 2017-03-15
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low efficiency of photogenerated electron-hole separation in bismuth vanadate has become the main factor restricting its catalytic activity.

Method used

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  • Preparation method of bismuth vanadate/graphene composite photocatalyst with controllable particle size
  • Preparation method of bismuth vanadate/graphene composite photocatalyst with controllable particle size
  • Preparation method of bismuth vanadate/graphene composite photocatalyst with controllable particle size

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Experimental program
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Effect test

Embodiment 1

[0024] The first step, the specific steps for preparing graphite oxide are as follows: the graphite oxide is prepared in the following manner: under ice-water bath conditions, add 1g NaNO to 40mL of sulfuric acid solution with a concentration of 98wt%. 3 and 2g flake graphite, stir for 30min; add 3g potassium permanganate to the above mixed solution, control the temperature at 10°C, stir for 1h; raise the temperature to 35°C, keep for 1h; add 60ml of deionized water dropwise and slowly heat up to 100°C, Add 5% hydrogen peroxide solution dropwise and stir for 1 h; wash with 5% HCl solution several times; after centrifugal filtration, vacuum dry at 60° C. for 48 h to obtain the desired graphite oxide.

[0025] In the second step, the precursor solution configuration process of the bismuth vanadate nanoparticles / graphene composite is as follows: (1) A certain amount of Bi(NO 3 ) 3 ·5H 2 O powder, add to 140mL mixed solution of alcohol and glycerin, stir and mix well at 60-80°C; (...

Embodiment 2

[0032] The first step, the specific steps for preparing graphite oxide are as follows: the graphite oxide is prepared in the following manner: under ice-water bath conditions, add 1g NaNO to 40mL of sulfuric acid solution with a concentration of 98wt.%. 3 and 2g flake graphite, stir for 30min; add 3g potassium permanganate to the above mixed solution, control the temperature at 10°C, stir for 1h; raise the temperature to 35°C, keep for 1h; add 60ml of deionized water dropwise and slowly heat up to 100°C, Add 5% hydrogen peroxide solution dropwise, stir for 1 h; wash with 5% HCL solution several times; after centrifugal filtration, vacuum dry at 60° C. for 48 h to obtain the desired graphite oxide.

[0033] In the second step, the precursor solution configuration process of the bismuth vanadate nanoparticles / graphene composite is as follows: ⑴. A certain amount of Bi(NO 3 ) 3 ·5H 2 O powder, added to 140mL mixed solution of alcohol and glycerin, stirred and mixed evenly at 70...

Embodiment 3

[0039] The first step, the specific steps of preparing graphite oxide are as follows: the graphite oxide is prepared in the following way: under ice-water bath conditions, add 1g NaNO to 40ml of sulfuric acid solution with a concentration of 98wt.%. 3 and 2g flake graphite, stir for 30min; add 3g potassium permanganate to the above mixed solution, control the temperature at 10°C, stir for 1h; raise the temperature to 35°C, keep for 1h; add 60mL of deionized water dropwise and slowly raise the temperature to 100°C, Add 5% hydrogen peroxide solution dropwise, stir for 1 h; wash with 5% HCL solution several times; after centrifugal filtration, vacuum dry at 60° C. for 48 h to obtain the desired graphite oxide.

[0040] In the second step, the precursor solution configuration process of the bismuth vanadate nanoparticles / graphene composite is as follows: ⑴. A certain amount of Bi(NO 3 ) 3 ·5H 2 O powder, added to 140mL mixed solution of alcohol and glycerin, stirred and mixed ev...

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Abstract

The invention relates to a preparation method of a pucherite / graphene compound photo-catalyst with a controllable particle size. The method comprises the following steps: dissolving bismuth nitrate and ammonium metavanadate precursor powder into a mixed reagent of glycerinum, alcohol and water to obtain a pucherite precursor solution; ultrasonically dispersing graphite oxide or a water solution or an alcoholic solution of the graphite oxide into the precursor solution; carrying out ultrasonic treatment, centrifugally filtering and drying in a drying oven; and finally preparing the pucherite / graphene compound photo-catalyst with the controllable particle size. Compared with the prior art, the obtained catalyst has the advantages of controllable particle size, and wide application prospect in the aspects of photocatalytic decomposition of organic pollutants and oxygen production employing photolysis of water.

Description

technical field [0001] The invention relates to a preparation method of bismuth vanadate / graphene composite photocatalyst with controllable particle size, in particular to a preparation method of bismuth vanadate nanoparticle / graphene composite photocatalyst with controllable size. Background technique [0002] Photocatalytic reaction is a way to use the most abundant energy in nature—sunlight to transform matter, and it is one of the many ways of interaction between light and matter. Under the light, the photocatalyst converts the light energy into the energy required by the chemical reaction to produce a catalytic effect, so that the surrounding oxygen and water molecules are excited into free negative ions with great oxidizing ability. Semiconductor photocatalysts are photosensitivity, and generate electrons and holes under the irradiation of light, which can trigger the redox reaction of adsorbed species, convert light energy into chemical energy, promote the decompositi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22
Inventor 朱申敏孙治华廖永亮娄湘虹路涛张荻
Owner SHANGHAI JIAOTONG UNIV