Modified titanium dioxide photoelectrode and preparation method and application thereof

A titanium dioxide and photoelectrode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problem of limited types of co-catalysts

Active Publication Date: 2017-06-20
河南鸿沃农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for now, for modifying TiO 2 The types of cocatalysts are still very limited, mainly including noble metal oxides (RuO x , IrO x ), cobalt-based compounds (CoNi LDH), nickel / iron-based compounds (NiFe LDH), etc., which provide a challenge for researchers to find new, efficient and cheap cocatalysts

Method used

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  • Modified titanium dioxide photoelectrode and preparation method and application thereof
  • Modified titanium dioxide photoelectrode and preparation method and application thereof
  • Modified titanium dioxide photoelectrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of Ni 1-x Fe x The preparation method of OOH modified titanium dioxide photoelectrode comprises the following steps:

[0025] (1) Add 0.42mL isopropyl titanate to 18mL 6mol / L hydrochloric acid, stir at room temperature for 10 minutes to obtain a mixed solution;

[0026] (2) Pour the mixed solution obtained in step (1) into a 25mL reaction kettle, and insert the FTO conductive glass. The upper end of the FTO conductive glass is higher than the liquid level of the mixed solution, so that a certain blank area is left above the FTO conductive glass as an electrode. Clamp the fixed area; put the reaction kettle in an oven, react with water heat at 150°C for 6 hours, and cool to room temperature naturally; then take out the conductive glass, wash it with high-purity water, and dry it with nitrogen to obtain a FTO conductive glass covered with a milky white film. Glass; then put the FTO conductive glass covered with a milky white film in a muffle furnace, heat up to 4...

Embodiment 2

[0029] A kind of Ni 1-x Fe x The preparation method of OOH modified titanium dioxide photoelectrode comprises the following steps:

[0030] (1) Add 0.42mL isopropyl titanate to 18mL 6mol / L hydrochloric acid, stir at room temperature for 10 minutes to obtain a mixed solution;

[0031] (2) Pour the mixed solution obtained in step (1) into a 25mL reaction kettle, and insert the FTO conductive glass. The upper end of the FTO conductive glass is higher than the liquid level of the mixed solution, so that a certain blank area is left above the FTO conductive glass as an electrode. Clamp the fixed area; put the reaction kettle in an oven, react with water heat at 150°C for 6 hours, and cool to room temperature naturally; then take out the conductive glass, wash it with high-purity water, and dry it with nitrogen to obtain a FTO conductive glass covered with a milky white film. Glass; then put the FTO conductive glass covered with a milky white film in a muffle furnace, heat up to 4...

Embodiment 3

[0034] A kind of Ni 1-x Fe x The preparation method of OOH modified titanium dioxide photoelectrode comprises the following steps:

[0035] (1) Add 0.42mL isopropyl titanate to 18mL 6mol / L hydrochloric acid, stir at room temperature for 10 minutes to obtain a mixed solution;

[0036] (2) Pour the mixed solution obtained in step (1) into a 25mL reaction kettle, and insert the FTO conductive glass. The upper end of the FTO conductive glass is higher than the liquid level of the mixed solution, so that a certain blank area is left above the FTO conductive glass as an electrode. Clamp the fixed area; put the reaction kettle in an oven, react with water heat at 150°C for 6 hours, and cool to room temperature naturally; then take out the conductive glass, wash it with high-purity water, and dry it with nitrogen to obtain a FTO conductive glass covered with a milky white film. Glass; then put the FTO conductive glass covered with a milky white film in a muffle furnace, heat up to 4...

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Abstract

The invention discloses a preparation method of an Ni1-xFexOOH-modified titanium dioxide photoelectrode. The preparation method comprises the following steps that a titanium source compound is added to hydrochloric acid and stirred, then conductive glass is inserted into the mixture, a hydrothermal reaction is generated, TiO2 grows to the surface of the conductive glass, the conductive glass is taken out, washing, drying and calcining are conducted, and the TiO2 photocathode is obtained; and then the TiO2 photocathode is used as a working electrode, an aqueous solution containing ferric chloride, nickel chloride, sodium fluoride, potassium chloride and hydrogen peroxide is used as electrolyte, Ni1-xFexOOH is modified on the working electrolyte through cyclic voltammetry, washing and drying are conducted, and the Ni1-xFexOOH-modified titanium dioxide photoelectrode is obtained. The prepared photoelectrode is used for hydrogen production through photoelectrocatalysis and water of decomposition, carrier recombination of the TiO2 photoelectrode can be inhibited effectively, besides the reaction activation energy is facilitated, and a surface oxygen evolution reaction of the photoelectrode is promoted.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, in particular to a Ni 1-x Fe x OOH modified titanium dioxide photoelectrode, its preparation method, and its application in photoelectrocatalytic water splitting. Background technique [0002] Energy crisis and environmental pollution are severe challenges facing the development of today's society. At present, the fuels used by people are mainly fossil energy such as coal, oil, and natural gas, which not only have limited reserves but are also non-renewable energy. Facing these two major problems, the world today is experiencing unprecedented challenges, and it is of far-reaching strategic significance to actively search for abundant, green and environmentally friendly renewable energy. Solar energy is not only rich in resources, but also free from geographical restrictions, so it has attracted the attention of researchers. The only product of hydrogen combustion is water, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06C25D9/04G01N27/26G01N27/48
CPCC25B1/04C25D9/04C25B1/55C25B11/091G01N27/26G01N27/48Y02E60/36
Inventor 张晓凡张炳雁刘静孔维倩杨保成
Owner 河南鸿沃农业科技有限公司
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