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Preparation method and applications of bismuth oxybromide compounded titanium dioxide nano-tube heterojunction material

A technology of titanium dioxide and nanotubes, applied in the field of photocatalysis, can solve the problems of limited application and inability to absorb visible light, and achieve the effects of reducing recombination, promoting rapid transfer, and easy recycling

Inactive Publication Date: 2019-04-02
TIANJIN UNIV
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Problems solved by technology

However, due to its large forbidden band width, it can only absorb ultraviolet light accounting for 5% of sunlight and cannot absorb visible light, which greatly limits its application.

Method used

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  • Preparation method and applications of bismuth oxybromide compounded titanium dioxide nano-tube heterojunction material
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  • Preparation method and applications of bismuth oxybromide compounded titanium dioxide nano-tube heterojunction material

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that: the following examples are illustrative, not restrictive, and the protection scope of the present invention cannot be limited by the following examples. The raw materials required in the following examples and comparative examples are all commercially available, and used Virahol, ethanol, ethylene glycol, ammonium fluoride, Bi(NO 3 ) 3· Both 5H2O and KBr are aqueous solutions. The X-ray diffractometer is a D8-Focus X-ray diffractometer from Bruker AXS Co., Ltd., Germany; the scanning electron microscope is a S-4800 field emission scanning electron microscope from Hitachi, Japan; the electrochemical workstation is a CHI660E electrochemical workstation from Shanghai Chenhua Instrument Co., Ltd. Workstation; the UV-visible spectrophotometer is the T6 UV-visible spectrophotometer of Beijing Puxi General Instrument...

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Abstract

The invention discloses a preparation method and applications of a bismuth oxybromide compounded titanium dioxide nano-tube heterojunction material. According to the preset invention, a heterojunctionis constructed by modifying TiO2 so as to increase the visible light utilization efficiency and the photogenerated electron hole recombination efficiency, and organic dyes are photoelectrocatalytically removed from water so as to purify the water; the composite material grows on the titanium (Ti) sheet, and the photocatalytic effect can be used as the catalyst for degrading toxic substances in the dye wastewater, such that the catalyst is easily recovered after the removal of the organic dyes from the water body compared with the powder catalyst; the material has suitable forbidden band width, and can absorb visible light, promote the rapid transfer of photogenerated electron holes, and reduce the recombination of electron holes so as to further improve the photocatalytic efficiency; andby using the material as the catalyst, the rhodamine B dye degrading performance is obviously improved, the stability is good, and the material can be used for a long time.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and relates to a nanometer photocatalytic heterojunction composite material, in particular to a preparation method and application of a titanium dioxide nanotube heterojunction material compounded with bismuth oxybromide. Background technique [0002] The problem of water environment has always been a problem that has been widely concerned at present. With the discharge of a large number of wastewater from dyeing and weaving factories, the problem of water pollution is becoming more and more serious. Rhodamine B (Rh.B) is one of the representative pollutants in fabric dyes. Due to the large amount of printing and dyeing wastewater, complex composition and high chroma, its treatment has always been a difficult problem. Photocatalytic technology is a good way to solve this problem at present. The electron-hole pairs are excited by light, and the holes and the generated superoxide radicals can...

Claims

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Application Information

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IPC IPC(8): B01J27/135C02F1/30C25D11/26C23C18/12C02F101/30C02F101/34C02F101/38
CPCC23C18/1204C23C18/1216C25D11/26C02F1/30B01J27/135C02F2101/308C02F2101/34C02F2101/38C02F2305/10B01J35/39
Inventor 贾丽霞于涛谭欣
Owner TIANJIN UNIV
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