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Titanium dioxide film electrode and preparation method thereof and application

A thin-film electrode, titanium dioxide technology, applied in chemical instruments and methods, electrodes, circuits, etc., can solve the problems of low photon efficiency, increase energy consumption, etc., and achieve the effect of inhibiting recombination, realizing effective utilization, and promoting separation

Inactive Publication Date: 2020-02-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, photogenerated electrons and holes are easily recombined in the photocatalytic process, resulting in low photon quantum efficiencies for photocatalytic water splitting to produce hydrogen and photocatalytic degradation of organic pollutants.
In order to further improve the photocatalytic efficiency, most researchers increase the degradation efficiency by applying voltage, but applying voltage will increase energy consumption

Method used

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  • Titanium dioxide film electrode and preparation method thereof and application
  • Titanium dioxide film electrode and preparation method thereof and application
  • Titanium dioxide film electrode and preparation method thereof and application

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0039] As a method for preparing a titanium dioxide thin film electrode according to an embodiment of the present invention, the method comprises the following steps:

[0040] (1) 0.058g of antimony trichloride, 0.72mL of tetrabutyl titanate, 30mL of deionized water and 30mL of hydrochloric acid solution with a mass fraction of 37% were mixed and dissolved to obtain a mixed solution A;

[0041](2) Clean the FTO conductive glass with acetone, ethanol and deionized water respectively, place the mixed solution A obtained in step (1) in a high-pressure reactor with a polytetrafluoroethylene liner, and conduct the FTO after cleaning The glass is immersed in the mixed solution A, with the FTO conductive glass facing down, and then reacted at 170°C for 6h;

[0042] (3) Rinse the FTO conductive glass treated in step (2) with deionized water after cooling, dry at 80° C. for 5 hours, and then heat-treat at 500° C. for 4 hours in a muffle furnace to obtain the titanium dioxide film elect...

Embodiment 2

[0045] As a kind of photoanode of the embodiment of the present invention, such as figure 2 As shown, the photoanode includes a monocrystalline silicon cell and a titanium dioxide thin film electrode as described in Example 1. The monocrystalline silicon cell has a front side and a reverse side, and the front side of the monocrystalline silicon cell is relatively smooth. The opposite side of battery sheet has positive pole and negative pole, and the positive pole on the backside of described monocrystalline silicon battery sheet is connected with the front side of titanium dioxide thin film electrode as described in embodiment 1 by wire A, and the front side of titanium dioxide thin film electrode is the front side of FTO conductive glass On the corresponding surface, one end of the wire A is bonded to the front top of the titanium dioxide thin film electrode through conductive silver glue and the other end of the wire is welded to the positive electrode on the reverse side of...

Embodiment 3

[0048] As a kind of photovoltaic cell of the embodiment of the present invention, the anode of the photovoltaic cell is the photoanode as described in embodiment 2, the cathode of the photovoltaic cell is a platinum electrode, and the electrolyte of the photovoltaic cell is an aqueous sodium sulfate solution of 0.1-0.5M, The platinum electrode and the photoanode described in Example 2 were immersed in a 0.1-0.5 M sodium sulfate aqueous solution in parallel while maintaining a certain distance.

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Abstract

The invention provides a titanium dioxide film electrode and a preparation method and application. The method comprises the steps: FTO conductive glass is immersed in a mixed solution obtained by mixing antimony trichloride, tetrabutyl titanate and a hydrochloric acid solution, and a reaction is conducted for 4-8 h at the temperature of 150-180 DEG C; and after cooling, washing and drying, heat treatment at 400-500 DEG C for 2-6 hours is conducted to obtain a titanium dioxide film electrode. The titanium dioxide film electrode and a monocrystalline silicon battery piece are combined to obtaina photo-anode. An anode of the photocell is a photo-anode, a cathode of the photocell is a platinum electrode, an electrolyte of the photocell is a sodium sulfate aqueous solution, and the photocell can be used for degrading organic matters in water. The titanium dioxide film electrode provided by the invention has good visible light response and photocatalytic performance, can effectively inhibitthe recombination of photon-generated carriers, and promotes the separation of photo-generated electrons and holes. The photo-anode provided by the invention can be used for degrading organic mattersin water under the irradiation of sunlight, and can simultaneously generate hydrogen without additionally providing voltage.

Description

technical field [0001] The invention relates to the field of materials used for wastewater treatment, in particular to a titanium dioxide thin film electrode and its preparation method and application. Background technique [0002] Using solar energy to treat wastewater is considered a very potential and promising technology. Photocatalytic water splitting hydrogen production technology is a semiconductor photocatalyst that generates photo-generated carriers (electrons-holes) and H in water under the irradiation of a certain wavelength of sunlight. + and OH - A process in which redox reactions occur to produce hydrogen and oxygen. Photocatalysis is applied in the sewage treatment industry, and the strong oxidizing hydroxyl radicals generated during the photocatalysis process can oxidize refractory organic matter. However, photogenerated electrons and holes are easily recombined in the photocatalytic process, resulting in low photon quantum efficiencies for photocatalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042C01B3/04C25B1/04C25B11/06C23C18/12
CPCC01B3/042C23C18/1216C25B1/04C25B1/55C25B11/077H01G9/20H01G9/2031Y02E10/542Y02E60/36
Inventor 曾庆意常晟胡春王铭麒
Owner GUANGZHOU UNIVERSITY
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