Preparation method of nitrogen-doped titanium dioxide nano line electrode

A titanium dioxide and nanowire technology, which is applied in the field of photoelectrodes, can solve the problems of reducing electron transfer and poor stability, and achieve the effects of enhancing efficiency, simplifying the implementation process, and reducing the probability of

Inactive Publication Date: 2012-03-14
TSINGHUA UNIV
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Problems solved by technology

Organic dye modification will greatly improve the light absorption and photoelectric conversion efficiency of the dye cell, but the stability is not good; for ion doping, although cation doping can change the TiO 2 The bandwidth of the nanostructure, but the cation is easy to form an electron-hole recombination center, which reduces the transfer of electrons

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  • Preparation method of nitrogen-doped titanium dioxide nano line electrode

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Embodiment Construction

[0013] The present invention provides a method for preparing a nitrogen-doped titanium dioxide nanowire electrode. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0014] 700mgTiO 2 Nanoparticles (P25, produced by Degussa, Germany) were dispersed in 5ml ethanol solution, and stirred for two hours to make the TiO 2 The nanoparticles are uniformly dispersed. Fluorine-doped tin oxide conductive glass (FTO) was cut into 2cm×1.5cm, and the FTO conductive glass sheet was ultrasonically cleaned with deionized water, acetone, deionized water, ethanol and deionized water for five minutes. Spin-coating the above TiO 2 The nanoparticle solution is spin-coated on the surface of the FTO conductive glass sheet, and the spin-coating rate is 1500-5000 rpm. Then put the electrode in a muffle furnace and sinter at 450°C for three hours to obtain the TiO prepared under the prior art 2 Nanoparticles.

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Abstract

The invention belongs to the technical field of photoelectrodes, which particularly relates to a preparation method of a nitrogen-doped titanium dioxide nano line electrode with visible light absorptivity. Concretely, a TiO2 nano line is prepared by utilizing an anodic oxidation method, is soaked in a hexamethylenetetramine solution, and is heated in a tubular furnace, nitrogen gas is used as carrier gas, and the nitrogen doping process is carried out. The TiO2 nano line is prepared by utilizing the anodic oxidation method, which enhances the specific surface area of TiO2 greatly, enhances the electronic transmission rate, promotes the effective separation of electron holes and reduces the probability of exciton recombination so as to increase the photocatalysis efficiency and the water photolysis efficiency of a photoelectrode; after the TiO2 nano line is doped by utilizing nitrogen, the absorption range of the TiO2 nano line to visible light is enhanced, and the water photolysis efficiency is reinforced; moreover, the process method has simple preparation and low cost, simplifies the execution process of the electrode and is beneficial to large-scale preparation and production; and the material has large application potential in the aspects of a solar battery, water-photolysis hydrogen production, photocatalysis degradation and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectrodes, in particular to a method for preparing a nitrogen-doped titanium dioxide nanowire electrode with visible light absorption. Background technique [0002] Improving the efficiency of semiconductor materials used as photoanodes in photoelectrochemical cells to photolyze water to produce hydrogen using solar light has always been a hot research topic at home and abroad. One of the bottlenecks restricting the development of current hydrogen production technology is to find new nanocrystalline systems, which have broadband photoelectric response and high photoelectric conversion efficiency, so as to solve the problem of traditional TiO 2 The system has the disadvantage of narrow visible spectrum band absorption; the special photoelectric properties of the one-dimensional ordered nanoarray electrodes have a strong dependence on the material structure. role. Recently, a lot of research has foc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/20H01M4/04H01M14/00H01L51/46H01L51/48
CPCY02E60/12Y02E10/549Y02E60/10
Inventor 李景虹吕小军张昊
Owner TSINGHUA UNIV
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