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Ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and preparation method and application thereof

A technology of iron hydroxyl and bismuth vanadate, applied in chemical instruments and methods, oxidized water/sewage treatment, light water/sewage treatment, etc., can solve the problem of limited types of co-catalysts, reduce reaction activation energy, and promote oxygen precipitation. Response, life-extending effect

Active Publication Date: 2017-11-07
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for now, for modifying BiVO 4 The types of cocatalysts are still very limited, mainly including noble metal oxides (RuO x , IrO x ), NiOOH / FeOOH and some cobalt-based compounds (CoO x , Co-Pi, CoAl LDH), etc., which provides a challenge for researchers to find new, efficient and cheap cocatalysts

Method used

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  • Ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and preparation method and application thereof
  • Ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and preparation method and application thereof
  • Ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and preparation method and application thereof

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Embodiment 1

[0027] A preparation method for nickel-iron oxyhydroxide modified bismuth vanadate photoelectrode, comprising the following steps:

[0028] (1) Use FTO conductive glass as the working electrode, platinum sheet as the counter electrode, Ag / AgCl (saturated KCl solution) as the reference electrode to form a three-electrode system, and mix the aqueous solution containing bismuth nitrate and potassium iodide with the ethanol solution of p-benzoquinone As an electrolyte, deposit at a potential of -0.1V (vs.Ag / AgCl) for 300 seconds, take out the working electrode, wash it with deionized water, and dry it with nitrogen to obtain a BiOI electrode;

[0029] (2) Take 100 μL of dimethyl sulfoxide solution of vanadyl acetylacetonate and drop-coat the BiOI electrode obtained in step (1) with BiOI (with an area of ​​1 cm 2 ), so that the dimethyl sulfoxide solution of vanadyl acetylacetonate is evenly spread on the surface of the BiOI material, and then placed on the temperature-controlled tit...

Embodiment 2

[0039] A preparation method for nickel-iron oxyhydroxide modified bismuth vanadate photoelectrode, comprising the following steps:

[0040] (1) Use FTO conductive glass as the working electrode, platinum sheet as the counter electrode, Ag / AgCl (saturated KCl solution) as the reference electrode to form a three-electrode system, and mix the aqueous solution containing bismuth nitrate and potassium iodide with the ethanol solution of p-benzoquinone As an electrolyte, deposit at a potential of -0.1V (vs.Ag / AgCl) for 250 seconds, take out the working electrode, wash it with deionized water, and dry it with nitrogen to obtain a BiOI electrode;

[0041] (2) Take 100 μL of dimethyl sulfoxide solution of vanadyl acetylacetonate and drop-coat the BiOI electrode obtained in step (1) with BiOI (with an area of ​​1 cm 2 ), so that the dimethyl sulfoxide solution of vanadyl acetylacetonate is evenly spread on the surface of the BiOI material, and then placed on the temperature-controlled t...

Embodiment 3

[0045] A preparation method for nickel-iron oxyhydroxide modified bismuth vanadate photoelectrode, comprising the following steps:

[0046] (1) Use FTO conductive glass as the working electrode, platinum sheet as the counter electrode, Ag / AgCl (saturated KCl solution) as the reference electrode to form a three-electrode system, and mix the aqueous solution containing bismuth nitrate and potassium iodide with the ethanol solution of p-benzoquinone As an electrolyte, deposit at a potential of -0.1V (vs.Ag / AgCl) for 350 seconds, take out the working electrode, wash it with deionized water, and dry it with nitrogen to obtain a BiOI electrode;

[0047] (2) Take 100 μL of dimethyl sulfoxide solution of vanadyl acetylacetonate and drop-coat the BiOI electrode obtained in step (1) with BiOI (with an area of ​​1 cm 2) on the surface of the vanadyl acetylacetonate so that the dimethyl sulfoxide solution of vanadyl acetylacetonate is evenly spread on the surface of the BiOI material, and...

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Abstract

The invention discloses a ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode and a preparation method and application thereof. The preparation method comprises the following steps: firstly, depositing bismuth oxyiodide on the surface of conductive glass, then coating the surface with the deposited bismuth oxyiodide with a dimethyl sulfoxide solution of vanadyl acetylacetonate, annealing, performing alkali soaking and rinsing with water to remove excessive vanadium pentoxide, and then drying to obtain a bismuth vanadate photoelectrode, and modifying ferro-nickel oxyhydroxide on the surface of the bismuth vanadate photoelectrode by adopting a cyclic voltammetry method in a three-electrode system, thus obtaining the ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode. The invention further discloses applications of the ferro-nickel oxyhydroxide-modified bismuth vanadate photoelectrode in photoelectrocatalytic decomposition water. The prepared photoelectrode is used for producing hydrogen from photoelectrocatalytic decomposition water, can inhibit the compounding of photon-generated carriers, the service life of carriers generated by a BiVO4 photoelectrode can be effectively prolonged, and the oxygen evolution reaction on the surface of the photoelectrode can be promoted, so that the solar optic hydrogen conversion efficiency of a semiconductor photoelectrode can be improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a nickel-iron oxyhydroxide modified bismuth vanadate photoelectrode, a preparation method thereof, and an application in photoelectric catalytic water decomposition. Background technique [0002] Due to the photoconductive and photovoltaic effects of semiconductor photoelectric functional materials, their photocatalytic activity is essentially determined by the behavior of semiconductor materials that generate photogenerated charges after being excited by light with sufficient energy, thus providing the possibility for the utilization of solar energy. Using semiconductor photoelectric functional materials to convert solar energy into chemical energy has important research significance and practical value for solving the current energy crisis and environmental problems. [0003] Bismuth vanadate (BiVO 4 ) has a narrow energy band width (2.4eV), and the...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/461C02F1/72
Inventor 张晓凡张炳雁孔维倩张守仁杨保成
Owner HUANGHE S & T COLLEGE
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