Bismuth vanadate-graphene composite photocatalyst, and preparation and application thereof

A graphene composite, photocatalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the complex reaction equipment, long preparation period and production cost. It can achieve high photocatalytic activity, short preparation cycle and low production cost.

Inactive Publication Date: 2013-08-28
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrothermal method used in this patent needs to be reacted at 180°C for 6 hours, and the preparation cycle is long, the reaction equipment is complex, the reaction energy consumption is high, and the production cost is high.

Method used

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  • Bismuth vanadate-graphene composite photocatalyst, and preparation and application thereof
  • Bismuth vanadate-graphene composite photocatalyst, and preparation and application thereof
  • Bismuth vanadate-graphene composite photocatalyst, and preparation and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] preparation:

[0054] The first step: preparation of graphene oxide colloidal suspension:

[0055] Firstly, graphene oxide was prepared by the Hume method using flake graphite powder as raw material; secondly, graphene oxide was centrifugally cleaned with double distilled water; finally, the cleaned graphene oxide was ultrasonically dispersed in double distilled water, and ultrasonic time 20-40min, the graphene oxide solution concentration is 2.9g / L;

[0056] The second step: preparation of bismuth vanadate-graphene oxide composite:

[0057] First, the product of the first step is stripped with sodium hydroxide solution;

[0058] Secondly, bismuth nitrate and ammonium metavanadate are dissolved in concentrated nitric acid and sodium hydroxide solution respectively to obtain bismuth nitrate solution and ammonium metavanadate solution of equal substance molar concentration and equal volume;

[0059] Finally, add the above-mentioned ammonium metavanadate solution into t...

Embodiment 2

[0067] preparation:

[0068] The first step: preparation of graphene oxide colloidal suspension:

[0069] Firstly, graphene oxide was prepared by the Hume method using flake graphite powder as raw material; secondly, graphene oxide was centrifugally cleaned with double distilled water; finally, the cleaned graphene oxide was ultrasonically dispersed in double distilled water, and ultrasonic time 20-40min, the graphene oxide solution concentration is 2.5g / L;

[0070] The second step: preparation of bismuth vanadate-graphene oxide composite:

[0071] First, the product of the first step is stripped with sodium hydroxide solution;

[0072] Secondly, bismuth nitrate and ammonium metavanadate are dissolved in concentrated nitric acid and sodium hydroxide solution respectively to obtain bismuth nitrate solution and ammonium metavanadate solution of equal substance molar concentration and equal volume;

[0073] Finally, add the above-mentioned ammonium metavanadate solution into t...

Embodiment 3

[0079] preparation:

[0080] The first step: preparation of graphene oxide colloidal suspension:

[0081] Firstly, graphene oxide was prepared by the Hume method using flake graphite powder as raw material; secondly, graphene oxide was centrifugally cleaned with double distilled water; finally, the cleaned graphene oxide was ultrasonically dispersed in double distilled water, and ultrasonic time 20-40min, the graphene oxide solution concentration is 3.2g / L;

[0082] The second step: preparation of bismuth vanadate-graphene oxide composite:

[0083] First, the product of the first step is stripped with sodium hydroxide solution;

[0084] Secondly, bismuth nitrate and ammonium metavanadate are dissolved in concentrated nitric acid and sodium hydroxide solution respectively to obtain equal substance molar concentrations and equal volumes of bismuth nitrate solution and ammonium metavanadate solution;

[0085] Finally, add the above-mentioned ammonium metavanadate solution into...

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Abstract

The invention provides a bismuth vanadate-graphene composite photocatalyst, and preparation and application thereof, and aims to provide a visible-light-responsive bismuth vanadate-graphene composite photocatalyst which has low production cost, short preparation period and high photocatalytic activity. The preparation method comprises the following production steps: 1, preparing a graphene oxide colloidal suspension; 2, preparing a bismuth vanadate-graphene oxide compound from bismuth nitrate, ammonium metavanadate and the graphene oxide colloidal suspension; 3, putting the product obtained in the step 2 in a microwave reactor to prepare a bismuth vanadate-graphene compound; and 4, performing centrifugal separation on the product obtained in the step 3, washing with redistilled water, and drying. The bismuth vanadate-graphene composite photocatalyst provided by the invention is high in photocatalytic activity and low in production cost; and the preparation method of the bismuth vanadate-graphene composite photocatalyst, provided by the invention, is simple to operate, short in preparation period, friendly to environment and suitable for commercial popularization.

Description

technical field [0001] The invention relates to the technical field of organic wastewater decolorization treatment, in particular to a bismuth vanadate-graphene composite photocatalyst prepared by microwave synthesis using graphene as a template and its application. Background technique [0002] With the rapid development of the global economy, the problem of environmental pollution has become increasingly prominent. Whether environmental pollution can be controlled and treated in a timely and effective manner will affect the further development of the economy. In traditional technical research, semiconductor photocatalysis technology represented by titanium dioxide has been widely used in the field of environmental pollution control. However, the bandgap width of titanium dioxide is 3.2eV, which only responds to ultraviolet light, and its practicability is poor. For this reason, many scholars at home and abroad have carried out a lot of research work, aiming to find a photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/32
Inventor 谢倩邓爱霞滕谋勇陶绪泉
Owner LIAOCHENG UNIV
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