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A kind of vanadium-doped zno nanorod array photoanode and its preparation method and application

A technology of nanorod array and photoanode, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of limiting the performance of photoanodes, improve the crystal structure of ZnO, promote separation, improve The effect of photoelectrochemical water splitting performance

Active Publication Date: 2019-10-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the severe recombination of photogenerated electrons and holes on the surface of ZnO, the improvement of photoanode performance is greatly limited.

Method used

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  • A kind of vanadium-doped zno nanorod array photoanode and its preparation method and application
  • A kind of vanadium-doped zno nanorod array photoanode and its preparation method and application
  • A kind of vanadium-doped zno nanorod array photoanode and its preparation method and application

Examples

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Embodiment 1

[0032] A method for preparing a vanadium-doped zinc oxide nanorod array photoanode, the method comprising the following steps:

[0033] (1) Prepare and obtain ZnO seed liquid, vanadium doping solution and growth solution respectively;

[0034] The preparation of the ZnO seed liquid is specifically: dissolving zinc acetate and ethanolamine in ethylene glycol monomethyl ether to prepare a ZnO seed liquid with a concentration of 0.5 M; wherein the molar mass ratio of zinc acetate and ethanolamine is :1:1;

[0035] The preparation method of the vanadium-doped solution is as follows: dissolving vanadium pentoxide in deionized water and ultrasonicating for 48 hours to obtain the vanadium-doped solution with a concentration of 1 mM;

[0036] The preparation method of the growth solution specifically includes: dissolving zinc nitrate hexahydrate and hexamethylenetetramine in deionized water to obtain the growth solution with a concentration of 50 mM, wherein the zinc nitrate hexahydr...

Embodiment 2

[0042] It is basically the same as Example 1, except that in step (3), when preparing the mixed solution, the volume ratio of the vanadium-doped solution to the growth solution is 2:40.

Embodiment 3

[0044]It is basically the same as Example 1, except that in step (3), when preparing the mixed solution, the volume ratio of the vanadium-doped solution and the growth solution is 3:40.

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Abstract

The invention mainly belongs to the field of photoelectrochemistry water-splitting for hydrogen production and particularly relates to a vanadium-doped ZnO nanorod array photo-anode, a preparation method of the vanadium-doped ZnO nanorod array photo-anode and an application of the vanadium-doped ZnO nanorod array photo-anode in photoelectrochemistry water-splitting for hydrogen production. The method comprises the steps of preparing a ZnO seed crystal solution, a vanadium-doped solution and a growth solution correspondingly; conducting spin-coating on conducting glass with the ZnO seed crystal solution and obtaining the conducting glass with the surface covered with a ZnO seed crystal layer after spin-coating and annealing; pulling the conducting glass with the surface covered with the ZnO seed crystal layer into a mixed solution of the vanadium-doped solution and the growth solution for a hydrothermal reaction, washing the conducting glass with deionized water after completion of the reaction, conducting annealing in a muffle furnace and then obtaining an vanadium-doped ZnO nanorod array. By adopting the vanadium-doped ZnO nanorod array photo-anode provided by the invention, the carrier life is prolonged, combination of electron holes is reduced, and the photoelectrochemistry water-splitting performance is improved.

Description

technical field [0001] The invention mainly belongs to the field of photoelectrochemical water splitting and hydrogen production, and specifically relates to a vanadium-doped ZnO nanorod array photoanode, a preparation method and application thereof. Background technique [0002] Hydrogen produced by solar photolysis is considered to be the cleanest energy to meet future energy needs. Among the different preparation methods at present, photoelectrochemical water splitting is considered to be one of the most promising approaches because of its high efficiency and environmental protection. In the photoelectrochemical system, the selection and design of the photoanode is the most critical link, because the light absorption capacity and carrier mobility of the photoelectrode greatly determine the photoelectrochemical performance. ZnO is a potential photoanode material for photoelectrolysis of water due to its relatively suitable energy band position, excellent carrier transport...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/04C25B1/55Y02E60/36Y02P20/133
Inventor 张跃刘怿冲康卓
Owner UNIV OF SCI & TECH BEIJING
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