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Preparation method of ferric oxide-doped nanowire ordered array photo-anode

A technology of iron oxide nanometer and ordered array, which is applied in the field of photocatalysis to achieve the effect of improving efficiency, improving photoelectric characteristics and promoting development

Inactive Publication Date: 2017-08-29
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But poor electrical conductivity limits the transfer of charges, is hematite α-Fe 2 o 3 A major limitation for use as a photoanode

Method used

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  • Preparation method of ferric oxide-doped nanowire ordered array photo-anode
  • Preparation method of ferric oxide-doped nanowire ordered array photo-anode

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[0021] The invention provides a preparation method of an ordered array photoanode doped with iron oxide nanowires, comprising the following steps:

[0022] (1) Evaporate a layer of metal on one side of a porous alumina template with through holes as a conductive base layer, wash it with deionized water and set aside;

[0023] (2) Use deionized water to prepare FeCl-containing 3 ·6H 2 O and (NH 4 ) 2 C 2 o 4 ·H 2 The mixed solution of O, the concentration of the mixed solution is 0.1~0.7mol / L, FeCl 3 ·6H 2 O and (NH4) 2 C 2 o 4 ·H 2 The molar ratio of O is 1:2~5; then add 0.05-0.5mol / L chloride salt ethanol solution of doping elements to the mixed solution to obtain deposition liquid, the volume ratio of the mixed solution and the chloride salt ethanol solution of doping elements is 20:1~10:1;

[0024] (3) The deposition solution obtained in step (2) is put into the deposition tank, and the two-electrode AC electrochemical method is used for deposition, and the eva...

Embodiment 1

[0029] The invention provides a preparation method of an ordered array photoanode doped with iron oxide nanowires, comprising the following steps:

[0030](1) Self-preparing porous alumina templates with through holes by anodic oxidation method, the aperture is 70nm, vapor-depositing a layer of metal on the porous alumina templates with through holes as the conductive base layer, washing with deionized water for later use;

[0031] (2) Use deionized water to prepare FeCl-containing 3 ·6H 2 O and (NH 4 ) 2 C 2 o 4 ·H 2 The mixed solution of O, the concentration of the mixed solution is 0.5mol / L, FeCl 3 ·6H 2 O and (NH4) 2 C 2 o 4 ·H 2 The molar ratio of O is 1:3; then add 0.5mol / L TiCl 4 The ethanol solution is obtained in the mixed solution to obtain the deposition solution, and the volume ratio of the mixed solution and the chloride salt ethanol solution of the doping element is 20:1;

[0032] (3) The deposition solution obtained in step (2) is put into the depos...

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Abstract

The invention discloses a preparation method of a ferric oxide-doped nanowire ordered array photo-anode and belongs to the technical field of catalysis. The preparation method comprises the following steps of: preparing a hydroxyl ferric oxide nanowire ordered array containing doping elements by means of an aluminum oxide ordered template and an electrochemical synthesis method; and then calcining a sample to obtain an ion-doped ferric oxide nanowire ordered array. The prepared ferric oxide-doped nanowire ordered array is of a polycrystal structure, is regular in arrangement and uniform in size, has a relatively good photocatalytic performance, and has a wide application prospect as the photo-anode in photolysis of water of producing hydrogen in the future.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a method for preparing a doped iron oxide nanowire ordered array photoanode. Background technique [0002] Hydrogen production from water splitting by sunlight will become an effective way to provide clean energy. There are two main approaches to photolysis of water: photocatalysis and photoelectrocatalysis. Photocatalysis is to disperse some photoactive catalytic materials in an aqueous solution, and when illuminated, hydrogen and oxygen are simultaneously generated in the entire solution. Photoelectrocatalysis uses photoactive materials as electrodes to form a photoelectrochemical cell, and the oxidation reaction occurs at the anode to precipitate O 2 , the cathode undergoes a reduction reaction to precipitate H 2 , the two electrodes and the external circuit are connected through the aqueous electrolyte solution to form a current loop. Compared with photocatalysis, ...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04C25D1/00B82Y40/00
CPCB82Y40/00C25B1/04C25D1/006C25B1/55C25B11/077Y02E60/36
Inventor 解挺张勇吴国胜
Owner HEFEI UNIV OF TECH
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