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Preparation of nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material and application of nickel-cobalt layered double hydroxide-supported bismuth vanadate compound material to photoelectric water oxidation

A nanoparticle and composite material technology, applied in the field of BiVO4-based composite materials, can solve problems such as affecting the efficiency of photocatalytic reaction

Inactive Publication Date: 2019-04-05
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BiVO 4 There are severe charge recombination and low water oxidation kinetics under light, which will affect the photocatalytic reaction efficiency, so it is urgent to further propose the reduction of BiVO 4 Efficient way to recombine photogenerated electrons and holes

Method used

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  • Preparation of nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material and application of nickel-cobalt layered double hydroxide-supported bismuth vanadate compound material to photoelectric water oxidation
  • Preparation of nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material and application of nickel-cobalt layered double hydroxide-supported bismuth vanadate compound material to photoelectric water oxidation
  • Preparation of nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material and application of nickel-cobalt layered double hydroxide-supported bismuth vanadate compound material to photoelectric water oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 3.3g potassium iodide and dissolve in 50mL deionized water, add 0.9gBi(NO 3 ) 3 ·5H 2 O, vigorously stirred, to Bi(NO 3 ) 3 ·5H 2 O completely dissolved; add 1M HNO 3 Adjust the pH value to obtain a mixed solution with a pH value of 1.5; weigh 0.4980g of p-benzoquinone, add it to 20mL of absolute ethanol, stir and dissolve to obtain a brown ethanol solution of p-benzoquinone; slowly add the p-benzoquinone ethanol solution dropwise to In the mixed solution, after the dropwise addition, stir for 30 minutes to obtain an electrolyte solution for electrochemical deposition to prepare reddish-brown BiOI nanosheet thin films; use a typical three-electrode electrolytic cell for deposition, among the three electrodes, FTO is used as the working electrode, and Ag / AgCl (3MKCl) as the reference electrode, and the platinum counter electrode as the counter electrode; before use, use a mixture of isopropanol, acetone and distilled water for ultrasonic cleaning, and use cyc...

Embodiment 2

[0039] Weigh 3.4g potassium iodide and dissolve in 50mL deionized water, add 1.0gBi(NO 3 ) 3 ·5H 2 O, vigorously stirred, to Bi(NO 3 ) 3 ·5H 2 O completely dissolved; add 1M HNO 3 Adjust the pH value to obtain a mixed solution with a pH value of 1.7; weigh 0.50 g of p-benzoquinone, add it to 20 mL of absolute ethanol, stir and dissolve to obtain a brown ethanol solution of p-benzoquinone; slowly add the p-benzoquinone ethanol solution dropwise to In the mixed solution, after the dropwise addition, stir for 30 minutes to obtain an electrolyte solution for electrochemical deposition to prepare reddish-brown BiOI nanosheet thin films; use a typical three-electrode electrolytic cell for deposition, among the three electrodes, FTO is used as the working electrode, and Ag / AgCl (3M KCl) as the reference electrode, and the platinum counter electrode as the counter electrode; before use, use isopropanol, acetone and distilled water to mix and ultrasonically clean, and use cyclic ...

Embodiment 3

[0041] Weigh 3.35g potassium iodide and dissolve in 50mL deionized water, add 0.95gBi(NO 3 ) 3 ·5H 2 O, vigorously stirred, to Bi(NO 3 ) 3 ·5H 2 O completely dissolved; add 1M HNO 3 Adjust the pH value to obtain a mixed solution with a pH value of 1.6; weigh 0.4990g of p-benzoquinone, add it to 20mL of absolute ethanol, stir and dissolve to obtain a brown ethanol solution of p-benzoquinone; slowly add the p-benzoquinone ethanol solution dropwise to In the mixed solution, after the dropwise addition, stir for 30 minutes to obtain an electrolyte solution for electrochemical deposition to prepare reddish-brown BiOI nanosheet thin films; use a typical three-electrode electrolytic cell for deposition, among the three electrodes, FTO is used as the working electrode, and Ag / AgCl (3MKCl) as the reference electrode, and the platinum counter electrode as the counter electrode; before use, use a mixture of isopropanol, acetone and distilled water for ultrasonic cleaning, and use c...

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Abstract

The invention provides preparation of a nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material and application of the nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material to photoelectric water oxidation. The preparation method of the nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadatecompound material comprises settling and preparing a precursor BiOI film on FTO (fluorine doped tin oxide) conductive glass, performing annealing to synthesizing a BiVO4 film, then performing electrochemical settlement to successfully loading NiCO-LDH (layered double hydroxide) nanoparticles into the BiVO4 film to form the NiCO-LDH / BiVO4 compound material in a sponge structure, which can effectively inhibit recombination of photo-generated carriers and accelerate separation of electrons and holes and accordingly achieve excellent PEC (photoelectric chemistry) activity. When serving as a photoanode for hydrogen and oxygen evolution reaction, the nickel-cobalt layered double hydroxide nanoparticle-supported bismuth vanadate compound material presents excellent water electrolysis hydrogen andoxygen production performance.

Description

technical field [0001] The present invention relates to a BiVO 4 The invention relates to the preparation of a bismuth vanadate composite material loaded with nickel-cobalt hydrotalcite nanoparticles, which is mainly used as a photoelectric anode material for hydrogen and oxygen evolution reactions. Background technique [0002] With the environmental pollution and resource shortage, hydrogen energy, as a clean energy source, has attracted more and more attention. Photoelectrochemical (PEC) cells have been uncovered as the most efficient way to generate hydrogen. BiVO 4 As a typical n-type semiconductor, the band gap Eg is about 2.4eV, it has visible light activity, and it is used as a photoanode for hydrogen evolution reaction. However, BiVO 4 There are severe charge recombination and low water oxidation kinetics under light, which will affect the photocatalytic reaction efficiency, so it is urgent to further propose the reduction of BiVO 4 An efficient way to recombin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J35/00B01J35/02C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/002B01J23/8472B01J35/40B01J35/39Y02E60/36
Inventor 佘厚德岳彭飞赵子威张靓黄静伟苏碧桃王其召王磊
Owner NORTHWEST NORMAL UNIVERSITY
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