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Bismuth phosphate compound graphene oxide photocatalyst as well as preparation method and application thereof

A photocatalyst and composite oxidation technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low quantum efficiency, restricting the practical application of photocatalytic technology, and low utilization of solar energy, etc. Achieving the effect that the preparation method is simple and feasible, and is beneficial to large-scale promotion

Inactive Publication Date: 2013-11-13
FUZHOU UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

In recent years, semiconductor photocatalytic technology has attracted extensive attention from scientists in many fields due to its important application prospects in hydrogen energy development and environmental pollution control. However, due to the traditional TiO 2 The shortcomings of low quantum efficiency and low utilization rate of solar energy in photocatalysts restrict the practical application of photocatalytic technology. Therefore, the successful development and design of new high-efficiency photocatalysts is one of the key technologies for using solar energy to control environmental pollution and develop hydrogen energy.

Method used

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  • Bismuth phosphate compound graphene oxide photocatalyst as well as preparation method and application thereof
  • Bismuth phosphate compound graphene oxide photocatalyst as well as preparation method and application thereof
  • Bismuth phosphate compound graphene oxide photocatalyst as well as preparation method and application thereof

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preparation example Construction

[0023] The preparation method of this photocatalyst has hydrothermal reduction method, hydrazine reduction method, photoreduction method, and specific steps are as follows:

[0024] Method one: the solid compound sodium phosphate (Na 3 PO 4 ), disodium hydrogen phosphate (Na 2 HPO 4 ), sodium dihydrogen phosphate (NaH 2 PO 4 ) dissolved in one or two mixed solvents of deionized water, ethylene glycol or ethanol to prepare a phosphorus source solution with a concentration of 0.1~1 mol / L; the solid compounds bismuth oxide and bismuth nitrate Or one of bismuth citrate was dissolved in deionized water, ethylene glycol or ethanol in one or two mixed solvents to prepare a bismuth source solution with a concentration of 0.1-1 mol / L; GO was dissolved in deionized A GO solution with a concentration of 1-10 mg / mL was prepared in one or two mixed solvents of ionized water, ethylene glycol or ethanol; the GO solution was added dropwise to the bismuth source solution, stirred for 30-1...

Embodiment 1

[0028] Example 1: Composite photocatalyst BiPO 4 / Preparation of RGO

[0029] Weigh 0.001 mol Bi(NO 3 ) 3 . 5H 2 Dissolve O solid in 35 mL ethylene glycol to prepare bismuth nitrate solution; weigh 0.001 mol NaH 2 PO 4 Dissolve the solid in 35 mL of deionized water to prepare a sodium dihydrogen phosphate solution; weigh 100 mg of GO solid and add 50 mL of ethylene glycol, and sonicate for 1 hour to obtain a graphene oxide ethylene glycol solution; take 3 mL of GO solution and add it to the bismuth nitrate solution , stirred for 1 hour, then slowly dripped sodium dihydrogen phosphate solution, continued to stir for 30 minutes, moved the mixed solution into a high-pressure reactor, kept the temperature at 130°C for 10 hours, and naturally cooled to room temperature, centrifuged, washed, and 60 Dry under normal pressure at ℃ for 24 hours and grind to get gray BiPO 4 / RGO composite photocatalyst powder.

Embodiment 2

[0030] Example 2: Composite photocatalyst BiPO 4 / Preparation of RGO

[0031] (1) BiPO 4 Preparation of 0.005 mol Bi(NO 3 ) 3 . 5H 2 O solid was dissolved in 35 mL deionized water to prepare bismuth nitrate solution; weigh 0.005 mol Na 3 PO 4 . 12H 2 Dissolve the O solid in 35 mL deionized water to prepare a sodium phosphate solution; add the sodium phosphate solution dropwise to the bismuth nitrate solution while stirring, stir for 2 hours, add concentrated nitric acid to adjust the pH of the mixed solution to 1, and transfer the mixed solution into the autoclave , kept at 180°C for 72 hours, cooled down to room temperature naturally, centrifuged, washed, dried at 60°C under normal pressure for 24 hours, and ground to obtain white BiPO 4 powder.

[0032] (2) BiPO 4 / Preparation of RGO Weigh 10 mg GO and add 70 mL of deionized water, and sonicate for 1 hour to prepare graphene oxide aqueous solution; weigh 500 mg BiPO 4 Add it to the GO solution, stir for 1 hour, ...

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Abstract

The invention discloses bismuth phosphate compound graphene oxide photocatalyst BiPO4 / RGO as well as a preparation method and application thereof. The photocatalyst is a composite material of bismuth phosphate (BiPO4) and graphene oxide (GO), and has a chemical formula namely BiPO4 / RGO. According to the invention, the BiPO4 / RGO composite material is firstly applied to the photocatalysis water decomposition field and the photocatalysis environmental pollution government filed. The preparation method disclosed by the invention is simple and easy to implement, free of complex and dear devices, gentle in synthesis condition and beneficial to large-scale popularization.

Description

technical field [0001] The invention belongs to the technical field of new material preparation, photocatalytic environmental pollution control and photocatalytic water decomposition to produce hydrogen, and specifically relates to a bismuth phosphate composite graphene oxide photocatalyst BiPO 4 / RGO and its preparation method and application. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, the sustainable development of human society is facing great challenges. Since 1972, Fujishima and Honda first reported TiO on Nature. 2 Since hydrogen can be produced by photolysis of water, how to effectively use solar energy to control pollution and develop new energy has attracted widespread attention from all over the world. In recent years, semiconductor photocatalytic technology has attracted extensive attention from scientists in many fields due to its important application prospects in hydrogen energy development and enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/186C01B3/06C02F1/32
CPCY02E60/36
Inventor 苏文悦潘宝王绪绪付贤智陈旬戴文新王煜
Owner FUZHOU UNIV
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