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Multilayer film material

A multi-layer film, antimony doping technology, applied in the field of electrochemistry, can solve the problems of unsatisfactory stability and service life of semiconductor composite materials, high cost of metal doping, poor stability, etc., and achieve obvious visible light absorption performance. , the effect of increasing the electrode activity and reducing the recombination probability

Inactive Publication Date: 2020-07-17
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal ion doping and heavy metal deposition can improve TiO 2 It is active under visible light, but because metal ions are easy to form electron-hole recombination centers, it is necessary to precisely control the doping concentration. If the concentration is too high, it is easy to generate metal clusters and block TiO 2 surface, making TiO 2 The activity under ultraviolet light decreases or the activity under visible light is much lower than that under ultraviolet light; at the same time, the cost of metal doping is high and makes TiO 2 The stability becomes worse
The stability and service life of semiconductor composite materials are often unsatisfactory, and most organic dyes are toxic and easy to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add isopropyl titanate and antimony trichloride to 3mol / L hydrochloric acid solution, make the substance concentration of antimony trichloride be 5mmol / L, the substance concentration of isopropyl titanate be 40mmol / L L, stirring and mixing, insert the pretreated FTO conductive glass into the above mixed solution for hydrothermal reaction at 180°C for 4h, cool to room temperature, take out the conductive glass, wash and dry, heat up to 450°C at a heating rate of 10°C / min and calcinate for 3h , cooled to room temperature to obtain an antimony-doped titanium dioxide nanoelectrode;

[0024] (2) placing the antimony-doped titanium dioxide nano-electrode prepared in step (1) in 10 wt% phosphoric acid aqueous solution, taking it out after hydrothermal treatment at 80° C. for 5 hours, cleaning and drying to obtain the antimony-doped titanium dioxide nano-electrode;

[0025] (3) with 0.1M LiClO 4 The mixed solution of +0.2M pyrrole monomer + acetone is used as the electrode...

Embodiment 2

[0027] (1) Add isopropyl titanate and antimony trichloride to 4mol / L hydrochloric acid solution, make the substance concentration of antimony trichloride be 4mmol / L, the substance concentration of isopropyl titanate be 24mmol / L L, stirring and mixing, insert the pretreated FTO conductive glass into the above mixed solution for hydrothermal reaction at 170°C for 5h, cool to room temperature, take out the conductive glass, wash and dry, heat up to 500°C at a heating rate of 5°C / min and calcinate for 3h , cooled to room temperature to obtain an antimony-doped titanium dioxide nanoelectrode;

[0028] (2) placing the antimony-doped titanium dioxide nanoelectrode prepared in step (1) in 8 wt% phosphoric acid aqueous solution, taking it out after hydrothermal treatment at 85° C. for 5 hours, cleaning and drying to obtain the antimony-doped titanium dioxide nanoelectrode;

[0029] (3) with 0.1M LiClO 4 The mixed solution of +0.2M pyrrole monomer + acetone is used as the electrodeposi...

Embodiment 3

[0031] (1) Add isopropyl titanate and antimony trichloride to 5mol / L hydrochloric acid solution, make the substance concentration of antimony trichloride be 5mmol / L, the substance concentration of isopropyl titanate be 40mmol / L L, stirring and mixing, insert the pretreated FTO conductive glass into the above mixed solution for 180°C hydrothermal reaction for 6h, cool to room temperature, take out the conductive glass, wash and dry, heat up to 400°C at a heating rate of 5°C / min and calcinate for 5h , cooled to room temperature to obtain an antimony-doped titanium dioxide nanoelectrode;

[0032] (2) Place the antimony-doped titanium dioxide nano-electrode prepared in step (1) in 5 wt % phosphoric acid aqueous solution, take it out after hydrothermal treatment at 90° C. for 5 hours, wash and dry, and obtain the antimony-doped titanium dioxide nano-electrode;

[0033] (3) with 0.1M LiClO 4 The mixed solution of +0.2M pyrrole monomer + acetone is used as the electrodeposition poly...

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PUM

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Abstract

The invention discloses a multilayer film material. The preparation method comprises the steps: adding a titanium source compound and an antimony source compound into a hydrochloric acid solution; stirring and mixing, inserting conductive glass into the mixed solution, carrying out hydrothermal reaction, and calcining at high temperature to obtain an antimony-doped titanium dioxide nano-electrode;then putting the antimony-doped titanium dioxide nano-electrode into a phosphoric acid aqueous solution, and carrying out hydrothermal treatment to obtain an antimony-doped titanium dioxide nano-electrode; and carrying out electro-polymerization deposition by taking the antimony-doped titanium dioxide nano-electrode as a working electrode to obtain the polypyrrole / antimony-doped titanium dioxidemultilayer film electrode. According to the prepared polypyrrole / antimony-doped titanium dioxide multilayer film electrode, antimony ion doping is carried out, the activity of TiO2 under visible lightis improved, polypyrrole nanowires are deposited on the surface of a titanium dioxide film to form p-n heterojunctions, and directional movement of electrons and holes is induced, so that the recombination probability of electron-hole pairs is reduced, and the electrode activity of the material is further improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a multilayer film material. Background technique [0002] Photocatalytic materials have been a hotspot in materials science and catalytic science research in recent years. As a semiconductor material, titanium dioxide is widely used in solar cells, supercapacitors, electrocatalysis and water splitting due to its unique physical and chemical properties. However TiO 2 The band gap energy is large, the recombination rate of photogenerated carriers is high, the utilization rate of solar energy is low, and the quantum efficiency is low. Therefore, it is necessary to improve the TiO-based 2 The utilization rate of visible light of photocatalysts and the reduction of the recombination probability of electron-hole pairs. At present, the specific modification methods include ion doping, noble metal deposition, semiconductor compounding, organic dye modification and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/46C02F101/30
CPCC02F1/30C02F1/46C02F2101/30C02F2103/343C02F2305/10
Inventor 熊帮云李静静彭银锭吕子钊
Owner FOSHAN UNIVERSITY
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