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Carbon-modified TiO2/WO3 composite nanofiber photocatalyst, preparation method and application

A technology of composite nanofibers and photocatalysts, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation process and achieve simple preparation process. , Enhanced photocatalytic performance, easy operation effect

Active Publication Date: 2016-06-15
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation process is complicated, and its photocatalytic ability needs to be further improved.

Method used

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  • Carbon-modified TiO2/WO3 composite nanofiber photocatalyst, preparation method and application
  • Carbon-modified TiO2/WO3 composite nanofiber photocatalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] carbon modified TiO 2 / WO 3 Composite nanofiber photocatalyst, its preparation steps are as follows:

[0038] 1) Add 1.1g polyvinylpyrrolidone to the mixture of 10mL ethanol and 6mL acetic acid, stir well, add 0.05g ammonium tungstate and 2mL tetrabutyl titanate, stir at 600rpm for 12h to get the precursor solution, add it In the electrospinning equipment (Concent 1006 type), the high-voltage electric field voltage is set to 12kV, and the distance from the injector to the receiving plate is 15cm. Under the action of the electric field force, the nanofibers are collected on the receiving device to form a nanofiber mat;

[0039] 2) Take the nanofiber mat and calcinate it at a temperature of 520°C for 30min to obtain TiO 2 / WO 3 Nanofibers;

[0040] 3) 20mgTiO 2 / WO 3 Nanofibers and 0.45g glucose were added to a hydrothermal reaction kettle containing 30mL deionized water, and the hydrothermal reaction was carried out at a temperature of 180°C for 4 hours. After the re...

Embodiment 2

[0043] carbon modified TiO 2 / WO 3 Composite nanofiber photocatalyst, its preparation steps are as follows:

[0044] 1) Add 1.1g polyvinylpyrrolidone to the mixture of 10mL ethanol and 6mL acetic acid, stir well, add 0.1g ammonium tungstate and 2mL tetrabutyl titanate, stir at 600rpm for 12h to get the precursor solution, add it In the electrospinning equipment (Concent 1006 type), the high-voltage electric field voltage is set to 12kV, and the distance from the injector to the receiving plate is 15cm. Under the action of the electric field force, the nanofibers are collected on the receiving device to form a nanofiber mat;

[0045] 2) Take the nanofiber mat and calcinate it at a temperature of 520°C for 30min to obtain TiO 2 / WO 3 Nanofibers;

[0046] 3) 20mgTiO 2 / WO 3 Nanofibers and 0.15g glucose were added to a hydrothermal reaction kettle containing 30mL deionized water, and the hydrothermal reaction was carried out at a temperature of 180°C for 4 hours. After the r...

Embodiment 3

[0049] carbon modified TiO 2 / WO 3 Composite nanofiber photocatalyst, its preparation steps are as follows:

[0050] 1) Add 1.1g polyvinylpyrrolidone to the mixture of 10mL ethanol and 6mL acetic acid, stir well, add 0.15g ammonium tungstate and 2mL tetrabutyl titanate, stir at 600rpm for 12h to get the precursor solution, add it In the electrospinning equipment (Concent 1006 type), the high-voltage electric field voltage is set to 12kV, and the distance from the injector to the receiving plate is 15cm. Under the action of the electric field force, the nanofibers are collected on the receiving device to form a nanofiber mat;

[0051] 2) Take the nanofiber mat and calcinate it at a temperature of 520°C for 30min to obtain TiO 2 / WO 3 Nanofibers;

[0052] 3) 20mgTiO 2 / WO 3 Nanofibers and 0.15g glucose were added to a hydrothermal reaction kettle containing 30mL deionized water, and the hydrothermal reaction was carried out at a temperature of 180°C for 4 hours. After the ...

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Abstract

The invention discloses a carbon-modified TiO2 / WO3 composite nanofiber photocatalyst, a preparation method and application and belongs to the technical field of nano photocatalytic materials. The preparation method includes following steps: 1), adding polyvinyl pyrrolidone, ammonium tungstate and tetrabutyl titanate into mixed liquid of alcohol and acetic acid, and mixing well before electrostatic spinning to obtain nanofiber felt; 2), calcining the nanofiber felt to obtain TiO2 / WO3 nanofiber; 3), adding the TiO / WO3 nanofiber, glucose and water into a reaction kettle, allowing hydrothermal reaction, filtering, cleaning, and drying to obtain the photocatalyst. The TiO2 / WO3 composite nanofiber is modified through carbon, a carbon layer on the surface of TiO2 is used as an electron collector, and WO3 is used as an electron hole collector, so that photo-generated carriers can be separated effectively and photocatalytic performance of the photocatalyst can be improved. In addition, WO3 can promote ordering and graphitizing of the carbon layer, so that photocatalytic performance of the photocatalyst can be further improved.

Description

technical field [0001] The invention relates to a carbon modified TiO 2 / WO 3 The composite nanofiber photocatalyst also relates to the preparation method and application of the photocatalyst, and belongs to the technical field of nanometer photocatalytic materials. Background technique [0002] In recent years, TiO 2 It is widely used in photocatalytic degradation of pollutants, photolysis of water to produce hydrogen, solar cells and other fields. TiO 2 It is a broadband semiconductor material with a band gap of 3.0eV (rutile phase) and 3.2eV (anatase phase). The bandgap E of the semiconductor g The larger the , the higher the oxidation-reduction electrode potential corresponding to the photogenerated electrons and holes generated, the stronger the redox ability of the semiconductor, and the easier it is to react with other substances. However, due to TiO 2 The bandgap width of the solar cell is large, and higher energy excitation is required (such as ultraviolet li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J35/06
CPCB01J23/002B01J23/30B01J35/58B01J35/39
Inventor 张鹏宋安刚胡俊华邵国胜王理杰
Owner ZHENGZHOU UNIV
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