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Preparation method and application of a core-shell structure composite optoelectronic material

A technology of core-shell structure and photoelectric materials, which is applied in chemical instruments and methods, electrodes, electrolytic components, etc., can solve the problems of short hole diffusion distance, low electron mobility, and limitation of photogenerated electron-hole separation and transfer. Achieve the effects of simple preparation method, excellent photoelectric performance and easy operation

Active Publication Date: 2021-12-03
QUANZHOU NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But rutile TiO 2 The nanorod array has a large forbidden band width, can only use about 4% of the ultraviolet light region in the solar spectrum, and its electron mobility is low (1 cm 2 / V / s), the hole diffusion path is short (10-100 nm), which limits the separation and transfer of photogenerated electrons and holes, resulting in low solar energy utilization and photoelectric conversion efficiency.

Method used

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  • Preparation method and application of a core-shell structure composite optoelectronic material
  • Preparation method and application of a core-shell structure composite optoelectronic material
  • Preparation method and application of a core-shell structure composite optoelectronic material

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Embodiment 1

[0023] Example 1 One-dimensional TiO 2 Fabrication of Nanorod Arrays

[0024] The FTO conductive glass was placed in acetone, absolute ethanol and deionized water in sequence, ultrasonically cleaned for 20 min respectively, and dried for later use after cleaning; then 15 mL of PTFE with a volume concentration of 37% HCl solution and 15 mL of deionized water, stirred at room temperature for 5 min to make it evenly mixed, then added 1.5 mmol of tetrabutyl titanate, and continued to stir for 5 min; place the cleaned FTO conductive glass obliquely in the reaction kettle In the process, make the conductive surface of FTO face up, and then move the reactor into a 170°C oven for hydrothermal reaction for 5 hours. After the reaction, take out the FTO conductive glass, rinse it with deionized water, dry it at room temperature, and place it in the muffle Calcined in a furnace at 400 °C for 2 h to obtain one-dimensional rutile TiO 2 Nanorod array, number 1.

Embodiment 2

[0026] 1) One-dimensional TiO 2 Fabrication of Nanorod Arrays

[0027] The FTO conductive glass was placed in acetone, absolute ethanol and deionized water in sequence, ultrasonically cleaned for 20 min respectively, and dried for later use after cleaning; then 15 mL of PTFE with a volume concentration of 37% was added to a 50 mL polytetrafluoroethylene reactor. HCl solution and 15 mL of deionized water, stirred at room temperature for 5 min to make it evenly mixed, then added 1.5 mmol of tetrabutyl titanate, and continued to stir for 5 min; the cleaned FTO conductive glass was placed obliquely in the reaction kettle In the process, make the conductive surface of FTO face up, and then move the reactor into a 170°C oven for hydrothermal reaction for 5 hours. After the reaction, take out the FTO conductive glass, rinse it with deionized water, dry it at room temperature, and place it in the muffle Calcined in a furnace at 400 °C for 2 h to obtain one-dimensional rutile TiO 2 n...

Embodiment 3

[0031] 1) One-dimensional TiO 2 Fabrication of Nanorod Arrays

[0032] The FTO conductive glass was placed in acetone, absolute ethanol and deionized water in sequence, ultrasonically cleaned for 20 min respectively, and dried for later use after cleaning; then 15 mL of PTFE with a volume concentration of 37% was added to a 50 mL polytetrafluoroethylene reactor. HCl solution and 15 mL of deionized water, stirred at room temperature for 5 min to make it evenly mixed, then added 1.5 mmol of tetrabutyl titanate, and continued to stir for 5 min; the cleaned FTO conductive glass was placed obliquely in the reaction kettle In the process, make the conductive surface of FTO face up, and then move the reactor into a 180°C oven for hydrothermal reaction for 3 hours. After the reaction, take out the FTO conductive glass, rinse it with deionized water, dry it at room temperature, and place it in the muffle Calcined in a furnace at 500 °C for 1 h to obtain one-dimensional rutile TiO 2 n...

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Abstract

The invention discloses a core-shell structure TiO 2 The preparation method of @CdSe composite photoelectric material and its application in visible light photocatalysis, the composite photoelectric material is one-dimensional TiO prepared by hydrothermal method 2 The nanorod array is used as the core layer, and CdSe is introduced as the shell layer by the electrochemical deposition method. The preparation method of the composite photoelectric material of the present invention is simple and easy to operate, and it can be used as a photoanode, and under the condition of using 0.2 mol / L sodium sulfide solution as an electrolyte, it exhibits excellent photoelectric performance under the action of visible light, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of preparation of photoelectric catalytic materials, in particular to a core-shell structure TiO 2 Preparation method and application of @CdSe composite optoelectronic material. Background technique [0002] Energy and environmental issues are two major issues facing mankind. Photocatalytic technology using semiconductor materials as catalysts is considered to be the most ideal and effective technology because it can convert solar energy into chemical energy at room temperature, photocatalytically decompose water to produce hydrogen and oxygen, reduce greenhouse gas carbon dioxide and decompose organic pollutants. Promising technology. Since the first discovery of semiconductor TiO in 1972 2 Since the single crystal photoelectrode can decompose water into hydrogen and oxygen under the action of ultraviolet rays, photocatalysis has become a new subject and has been favored by researchers in various fields at home an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057C25B1/04C25B1/55C25B11/091
CPCY02E60/36
Inventor 庄华强刘晓彬卓东贤徐文涛吴平辉
Owner QUANZHOU NORMAL UNIV
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