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Flexible tio with visible light catalytic performance 2 /pvdf@mos 2 Composite nanofiber and preparation method thereof

A technology of composite nanofibers and catalytic performance, applied in the direction of catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of fast recombination rate of photogenerated electrons and holes, difficulties in separation and recovery, low photocatalytic activity, etc. problem, to achieve good catalytic performance, mild experimental conditions, and simple preparation process

Active Publication Date: 2020-10-30
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, TiO 2 The photogenerated electron-hole recombination rate is fast, resulting in low quantum efficiency and low photocatalytic activity
In addition, for powder photocatalysts, it is very difficult to separate and recover after the catalytic reaction is completed, and it is easy to cause secondary pollution

Method used

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  • Flexible tio with visible light catalytic performance <sub>2</sub> /pvdf@mos <sub>2</sub> Composite nanofiber and preparation method thereof
  • Flexible tio with visible light catalytic performance <sub>2</sub> /pvdf@mos <sub>2</sub> Composite nanofiber and preparation method thereof
  • Flexible tio with visible light catalytic performance <sub>2</sub> /pvdf@mos <sub>2</sub> Composite nanofiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A flexible TiO with visible light catalytic performance 2 / PVDF@MoS 2 The preparation method of composite nanofiber comprises the following steps:

[0030](1) The mass percentage content of configuration PVDF is 16.7%, and the solvent is 24g of the solution of DMF and acetone mixed solution, wherein, PVDF 4g, DMF and acetone mixed solution 20g, DMF and acetone mass percentage are 1:1, use magnetic stirrer Stir the solution at 40°C for 2h, then add 10mL TBOT solution to the container, and keep stirring for 1h to obtain the TBOT / PVDF spinning precursor solution;

[0031] (2) The prepared solution was used for electrospinning, wherein the spinning voltage was 9kV, and the spinning distance was 11cm. The solution is spun into fibers, collected on a pole drum, and finally deposited to obtain a fiber film;

[0032] (3) Dry the fiber film obtained in step (2) in an oven at 60°C for 10 hours, and then cut it into small square pieces of 2 cm×2 cm;

[0033] (4) Under normal t...

Embodiment 2

[0040] A flexible TiO with visible light catalytic performance 2 / PVDF@MoS 2 The preparation method of composite nanofiber comprises the following steps:

[0041] (1) The mass percentage content of configuration PVDF is 16.7%, and the solvent is 24g of the solution of DMF and acetone mixed solution, wherein, PVDF 4g, DMF and acetone mixed solution 20g, DMF and acetone mass percentage are 1:1, use magnetic stirrer Stir the solution at 40°C for 2h, then add 10mL TBOT solution to the container, and keep stirring for 1h to obtain the TBOT / PVDF spinning precursor solution;

[0042] (2) Use the prepared solution for electrospinning. The spinning voltage is 9kV, and the spinning distance is 11cm. The solution is spun into fibers, collected on a pole drum, and finally deposited as a fiber film;

[0043] (3) Dry the obtained TBOT / PVDF fiber membrane in an oven at 60°C for 10 hours, and then cut it into square pieces of 2cm×2cm;

[0044] (4) Under normal temperature conditions, wei...

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Abstract

The invention discloses a flexible TiO2 / PVDF@MoS2 composite nanofiber with a visible light catalytic performance and a preparation method thereof. The flexible TiO2 / PVDF@MoS2 composite nanofiber is prepared by the following steps: preparing a TBOT / PVDF fiber by an electrostatic spinning method, and synthesizing the flexible TiO2 / PVDF@MoS2 composite nanofiber by a hydrothermal method, wherein the flexible TiO2 / PVDF@MoS2 composite nanofiber is a core-shell structure fiber, the inner layer of the fiber is a TiO2 / PVDF fiber core, and MoS2 small particles are distributed on the outer layer. The prepared flexible TiO2 / PVDF@MoS2 composite nanofiber is the core-shell structure fiber, and controllable in shape, and has the advantages of flexibility, visible light catalytic performance, simple separation and recovery and reutilization. A preparation process is simple, and experiment conditions are moderate, and an effective method is provided for preparing a novel flexible fiber-like visible light catalyst.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a flexible TiO with visible light catalytic performance 2 / PVDF@MoS 2 Preparation method of composite nanofiber. Background technique [0002] As an efficient, economical and environmentally friendly "green" technology, photocatalysis offers great potential for environmental protection and energy conversion. The production of advanced photocatalytic materials is one of the main strategies to address the current global environmental protection needs. Over the past decades, titanium dioxide has been shown to be a promising candidate as a photocatalyst in various transition metal oxide semiconductors due to its favorable physicochemical properties, non-toxicity, low cost, and chemical and photonic stability. However, as an n-type wide bandgap semiconductor, titanium dioxide can only absorb ultraviolet light, which accounts for only 4% of the total sunlight in the solar sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/06B01J37/10B01J37/34C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J31/38B01J35/0013B01J35/004B01J35/008B01J35/06B01J37/10B01J37/342C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 龙云泽张志广王晓雄刘慧张俊付洁李如张富宝
Owner QINGDAO UNIV
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