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Gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and preparation method and application thereof

A composite material and photoelectrode technology, which is applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of low solar conversion efficiency and limit the application of TiO, so as to broaden the spectrum absorption range, improve separation and transfer efficiency, and enhance absorption intensity Effect

Inactive Publication Date: 2017-12-15
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to TiO 2 The potential of the hole is about 3.0 ~ 3.2 V (vs. RHE), and it can only absorb ultraviolet light, which only accounts for 4% of the solar energy on the earth's surface, so TiO 2 The solar conversion efficiency of TiO is relatively low, which limits the 2 Applications in Photocatalysis

Method used

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  • Gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and preparation method and application thereof
  • Gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and preparation method and application thereof
  • Gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and preparation method and application thereof

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Effect test

Embodiment 1

[0033] A P-C 3 N 4 @Au modified TiO 2 A method for preparing a photoelectrode, comprising the steps of:

[0034] (1) Growth of TiO on FTO conductive glass substrate 2 Nano stave

[0035] A titanium source compound was added to hydrochloric acid with a mass fraction of 18.5%, and stirred at room temperature until the solution was clear to obtain a mixed solution; the titanium source compound was isopropyl titanate, and the volume ratio of hydrochloric acid to titanium source compound was 3:0.06. Firstly, the obtained mixed solution was transferred to a tetrafluoroethylene-lined reactor, and then the cleaned FTO conductive glass was placed in the reactor leaning downwards. The hydrothermal reaction was carried out at 150°C for 12 hours, and then the temperature was naturally lowered to room temperature. The FTO conductive glass obtained after the hydrothermal reaction was taken out, washed with ultrapure water, and high-purity N 2 blow dry. Then put it into a muffle furnac...

Embodiment 2

[0045] A P-C 3 N 4 @Au modified TiO 2 A method for preparing a photoelectrode, comprising the steps of:

[0046] (1) Growth of TiO on FTO conductive glass substrate 2 Nano stave

[0047] Add a titanium source compound to hydrochloric acid with a mass fraction of 15%, and stir at room temperature until the solution is clear to obtain a mixed solution; the titanium source compound is isopropyl titanate, and the volume ratio of hydrochloric acid to titanium source compound is 3:0.06. Firstly, the obtained mixed solution was transferred to a tetrafluoroethylene-lined reactor, and then the cleaned FTO conductive glass was placed in the reactor leaning downwards. After hydrothermal reaction at 140°C for 12 h, the temperature was naturally lowered to room temperature, and the FTO conductive glass obtained after the hydrothermal reaction was taken out, washed with ultrapure water, and high-purity N 2 blow dry. Then put it into a muffle furnace and raise the temperature to 400 °C...

Embodiment 3

[0055] A P-C 3 N 4 @Au modified TiO 2 A method for preparing a photoelectrode, comprising the steps of:

[0056] (1) Growth of TiO on FTO conductive glass substrate 2 Nano stave

[0057] Add a titanium source compound to hydrochloric acid with a mass fraction of 20%, and stir at room temperature until the solution is clear to obtain a mixed solution; the titanium source compound is n-butyl titanate, and the volume ratio of hydrochloric acid to titanium source compound is 3:0.07. Firstly, the obtained mixed solution was transferred to a tetrafluoroethylene-lined reaction kettle, and then the cleaned FTO glass was placed in the reaction kettle with the conductive surface facing down. The hydrothermal reaction was carried out at 160°C for 6 hours, and then the temperature was naturally lowered to room temperature. The FTO conductive glass obtained after the hydrothermal reaction was taken out, washed with ultrapure water, and the high-purity N 2 blow dry. Then put it into a...

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Abstract

The invention discloses a gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode and a preparation method and application thereof. The preparation method comprises the following steps: FTO conductive glass with Tio2 nanorods growing is prepared by taking the FTO conductive glass as a substrate through a hydrothermal synthesis method; a P-doped C3N4 composite material and an Au-modified P-doped C3N4 composite material are prepared; the Au-modified P-doped C3N4 composite material is dissolved in water; and the FTO conductive glass with the Tio2 nanorods growing is spin-coated with the solution to obtain the P-C3N4@Au modified Tio2 photoelectrode (i.e. the gold-modified phosphorus-doped carbon nitride composite material modified titanium dioxide photoelectrode). According to the P-C3N4@Au modified Tio2 photoelectrode, a spectral absorption range is expanded, the absorption intensity of ultraviolet visible light is enhanced, and the photoelectric catalysis property is effectively improved.

Description

technical field [0001] The invention belongs to the field of optoelectronic materials, and in particular relates to a gold-modified phosphorus-doped carbon nitride composite material-modified titanium dioxide photoelectrode, a preparation method and application thereof. Background technique [0002] In today's society, the excessive development and use of traditional energy sources such as natural gas, coal, and oil by human beings has made the energy crisis more and more aggravated. While consuming a large amount of traditional non-renewable resources, it also produces serious environmental pollution and greenhouse effect. For the sustainable development of society, the development and utilization of renewable and clean energy has attracted more and more attention. The amount of solar energy reserves in nature far exceeds other renewable resources. It is a clean renewable resource without pollution and without geographical restrictions. How to utilize solar energy efficie...

Claims

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Application Information

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IPC IPC(8): C25B11/08C25B1/04
CPCC25B1/04C25B1/55C25B11/051C25B11/093Y02E60/36
Inventor 孔维倩张晓凡何广利常彬彬张守仁杨保成
Owner HUANGHE S & T COLLEGE
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