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Preparation method and application of heterojunction photoelectrode

A heterojunction and photoelectrode technology, applied in the direction of material electrochemical variables, can solve problems such as limiting photoelectric conversion efficiency, and achieve the effect of cheap and easy-to-obtain materials, good photoelectrochemical performance, and good repeatability

Active Publication Date: 2015-11-11
常熟市知识产权运营中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Titanium dioxide (TiO 2 ) is the earliest known semiconductor for solar hydrogen production, however, due to TiO 2 The wide band gap (about 3.2eV) can only respond to ultraviolet light (about 5% of sunlight), which greatly limits the ability of TiO 2 The photoelectric conversion efficiency; graphene has the ability to promote the transfer of photogenerated charges between different semiconductors and enhance the performance of PEC water splitting. Graphene, as an excellent charge transport medium, has been applied to α-Fe 2 o 3 / BiV 1–x Mo x o 4 and Fe 3 o 4 Construction of / ZnO heterojunction photoelectrode

Method used

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  • Preparation method and application of heterojunction photoelectrode

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Experimental program
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Effect test

Embodiment 1

[0035] A. TiO was prepared on FTO substrate 2 nanorod array

[0036] The described preparation of TiO on the FTO substrate 2 The steps of nanorod array are:

[0037] (1) Dissolve 15mL of hydrochloric acid solution in 15mL of deionized water, then slowly add 0.35mL of butyl titanate to the solution and stir until the solution becomes clear to obtain mixed solution A.

[0038] (2) Transfer the mixed solution A to a tetrafluoroethylene-lined reaction kettle, put the cleaned FTO substrate in it, with the conductive side facing down, raise the temperature to 180°C for 6 hours, and cool naturally to obtain surface deposition monolayer TiO 2 FTO substrate of nanorod arrays.

[0039] (3) Add 2 mL of acetic acid to 100 mL of ethanol, and then add 1.5 mL of butyl titanate and stir to form a uniform mixed solution B.

[0040] (4) Take out the above-mentioned FTO substrate, wash it with deionized water, and then soak it in solution B for 1 hour.

[0041] (5) Put the soaked FTO subst...

Embodiment 2

[0047] A. TiO was prepared on FTO substrate 2 Nanorod Arrays:

[0048] The described preparation of TiO on the FTO substrate 2 The steps of nanorod array are:

[0049] (1) Dissolve 15mL of hydrochloric acid solution in 15mL of deionized water, then slowly add 0.35mL of butyl titanate to the solution and stir until the solution becomes clear to obtain mixed solution A.

[0050] (2) Transfer the mixed solution A to a tetrafluoroethylene-lined reaction kettle, put the cleaned FTO substrate in it, with the conductive side facing down, raise the temperature to 180°C for 6 hours, and cool naturally to obtain surface deposition monolayer TiO 2 FTO substrate of nanorod arrays.

[0051] (3) Add 2 mL of acetic acid to 100 mL of ethanol, and then add 1.5 mL of butyl titanate and stir to form a uniform mixed solution B.

[0052] (4) Take out the above-mentioned FTO substrate, wash it with deionized water, and then soak it in solution B for 1 hour.

[0053] (5) Put the soaked FTO sub...

Embodiment 3

[0059] A. TiO was prepared on FTO substrate 2 nanorod arrays.

[0060] The described preparation of TiO on the FTO substrate 2 The steps of nanorod array are:

[0061] (1) Dissolve 15mL of hydrochloric acid solution in 15mL of deionized water, then slowly add 0.35mL of butyl titanate to the solution and stir until the solution becomes clear to obtain mixed solution A.

[0062] (2) Transfer the mixed solution A to a tetrafluoroethylene-lined reaction kettle, put the cleaned FTO substrate in it, with the conductive side facing down, raise the temperature to 180°C for 6 hours, and cool naturally to obtain surface deposition monolayer TiO 2 FTO substrate of nanorod arrays.

[0063] (3) Add 2 mL of acetic acid to 100 mL of ethanol, and then add 1.5 mL of butyl titanate and stir to form a uniform mixed solution B.

[0064] (4) Take out the above-mentioned FTO substrate, wash it with deionized water, and then soak it in solution B for 1 hour.

[0065] (5) Put the soaked FTO sub...

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Abstract

The invention belongs to the technical field of photoelectrochemistry, and particularly relates to a preparation method and the application of a heterojunction photoelectrode. The preparation method comprises the steps of firstly forming a double-layer TiO2 nano-rod array on an FTO substrate; then, uniformly coating the double-layer TiO2 nano-rod array with a layer of oxidized-reduced grapheme by utilizing a spin coating method; finally, loading CdS@Au core-shell-structured nano particles on the surface of oxidized-reduced grapheme / TiO2 by using a chemical deposition method and a photo-deposition method. An Au@CdS / RGO / TiO2 heterojunction photoelectrode which is prepared by utilizing a simple hydrothermal synthesis method, the spin coating method, the chemical deposition method and the photo-deposition method has the advantages of good chemical stability and good photoelectrochemical performance. The preparation method disclosed by the invention has the advantages that the technology is simple, the repeatability is good, materials which are used are cheap and are easy to get, and the requirement on environmental friendliness is met.

Description

technical field [0001] The invention belongs to the field of photoelectrochemical technology, and particularly refers to a preparation method and application of a heterojunction photoelectrode. First, double-layer TiO is synthesized on an FTO substrate. 2 Nanorod arrays, and then uniformly spin-coat a layer of redox graphene on it by spin coating (, and finally use chemical deposition and photodeposition on redox graphite / TiO 2 Surface loaded CdSAu core-shell structured nanoparticles. Background technique [0002] Since the 21st century, the excessive use of fossil energy has caused serious damage to the global environment, so the development and utilization of green energy has become one of the most important challenges facing mankind; photoelectrochemical (PEC) water splitting hydrogen production is a It is a promising technology, which can realize the conversion of solar energy to chemical energy, and the non-polluting combustion process makes hydrogen have incomparable ...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 范伟强李春发陈超吴国玲陈继斌
Owner 常熟市知识产权运营中心有限公司
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