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Tungsten trioxide composite photoelectrode, preparation method thereof, and application in photoelectrocatalytic water splitting

A technology of tungsten trioxide and composite light, which is applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., to achieve the effects of improving transfer efficiency, promoting oxygen evolution reaction, and improving efficiency

Inactive Publication Date: 2018-05-01
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, co-modification of WO with RGO and Ni:FeOOH 3 Research on photocatalytic water splitting has not been reported yet

Method used

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  • Tungsten trioxide composite photoelectrode, preparation method thereof, and application in photoelectrocatalytic water splitting
  • Tungsten trioxide composite photoelectrode, preparation method thereof, and application in photoelectrocatalytic water splitting
  • Tungsten trioxide composite photoelectrode, preparation method thereof, and application in photoelectrocatalytic water splitting

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A preparation method of a tungsten trioxide composite photoelectrode, comprising the following steps:

[0033] (1) Add 0.625g tungstic acid and 0.25g polyvinyl alcohol into 8.5mL hydrogen peroxide solution, stir overnight to form a uniform solution and obtain a seed layer solution; pass the FTO conductive glass through acetone, absolute ethanol and dehydrated After ultrasonication of the ionized water for 15 minutes, dry it with nitrogen gas; then place the FTO conductive glass on the rotating disk of the spin coater, pipette 150 μL of the seed layer solution and drop-coat it on the conductive glass, and the coating area is fixed as 1.5cm 2 , the rotation speed is 3000 rpm, and it is maintained for 30 seconds. This is a spin-coating cycle. The number of spin-coating cycles is 5 times. The FTO conductive glass is coated with a colorless film; then the coated FTO conductive glass is placed On a temperature-controlled titanium substrate heating platform, raise the tempera...

Embodiment 2

[0038] A preparation method of a tungsten trioxide composite photoelectrode, comprising the following steps:

[0039] (1) Add 0.595g tungstic acid and 0.17g polyvinyl alcohol into 8.5mL hydrogen peroxide solution, stir overnight to form a uniform solution and obtain a seed layer solution; pass the FTO conductive glass through acetone, absolute ethanol and dehydrated After ultrasonication of the ionized water for 15 minutes, dry it with nitrogen gas; then place the FTO conductive glass on the rotating disk of the spin coater, pipette 120 μL of the seed layer solution and drop-coat it on the conductive glass with a fixed coating area of 1.5cm 2 , the rotating speed is 3500 rpm, and it is maintained for 20 seconds. This is a spin-coating cycle. The number of spin-coating cycles is 20 times in total. The FTO conductive glass is coated with a colorless film; then the coated FTO conductive glass is placed On the temperature-controlled titanium substrate heating platform, the temper...

Embodiment 3

[0044] A preparation method of a tungsten trioxide composite photoelectrode, comprising the following steps:

[0045] (1) Add 0.68g tungstic acid and 0.34g polyvinyl alcohol into 8.5mL hydrogen peroxide solution, stir overnight to form a uniform solution and obtain a seed layer solution; pass the FTO conductive glass through acetone, absolute ethanol and dehydrated After the ionized water was ultrasonicated for 15 minutes, it was blown dry with nitrogen; then the FTO conductive glass was placed on the rotating disk of the spin coater, and 180 μL of the seed layer solution was pipetted with a pipette gun and drip-coated on the conductive glass, and the coating area was fixed as 1.5cm 2 , the rotating speed is 2500 rpm, and it is maintained for 40 seconds. This is a spin-coating cycle. The number of spin-coating cycles is 10 times in total. The FTO conductive glass is coated with a colorless film; then the coated FTO conductive glass is placed On the temperature-controlled tita...

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Abstract

The invention discloses a preparation method of a tungsten trioxide composite photoelectrode. The preparation method comprises the following steps: firstly, generating a tungsten trioxide film on a piece of conductive glass so as to obtain a substrate; secondly, performing hydrothermal and annealing treatment on the substrate so as to obtain a tungsten trioxide nanosheet photoelectrode; thirdly, coating the tungsten trioxide nanosheet photoelectrode with graphene oxide by using a spin-coating method, and annealing so as to obtain a reduced graphene modified tungsten trioxide photoelectrode; and in a three-electrode system, by taking the reduced graphene modified tungsten trioxide photoelectrode as a working electrode and taking a solution containing ferric trichloride, nickel chloride, sodium fluoride, potassium chloride and hydrogen peroxide as electrolyte, performing cyclic loop sweeping by using a cyclic voltammetry method, and washing and drying the working electrode, thereby obtaining the tungsten trioxide composite photoelectrode. As reduced graphene and nickel doped hydroxyl iron oxide are adopted to modify the tungsten trioxide photoelectrode, the conductivity of the photoelectrode and the transfer efficiency of a photon-generated carrier are improved, an oxygen separation reaction of an electrode interface is promoted, and the efficiency of the photoelectrode in decomposition of water through photoelectrocatalysis is improved.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a tungsten trioxide composite photoelectrode, a preparation method thereof, and an application in photoelectric catalytic water decomposition. Background technique [0002] It is one of the most promising ways to solve the current energy crisis by using semiconductor photocatalytic technology to convert solar energy into hydrogen energy through water splitting, and store it in the form of chemical energy such as hydrogen and then use it. In 1972, Fujishima first reported TiO 2 Photoelectrodes can use solar energy to split water [A.Fujishima, K.Honda, Nature, 1972, 238(5358): 37-38, which has opened the prelude to photoelectrochemical water splitting. In 1976, Honda first introduced WO 3 As a photoanode for photocatalytic water splitting [G. Hodes, D. Cahen, J. Manassen, Nature, 1976, 260: 312-313], it has attracted extensive attention of researchers....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B1/55C25B11/051C25B11/091Y02E60/36
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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