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Semiconductor hetero-junction/conductive polymer fiber membrane composite photocatalyst and preparation method thereof

A conductive polymer, fiber membrane technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of small specific surface area, low flexibility and carrier cost Advanced problems, to achieve the effect of improving catalytic performance, low surface tension, and inhibiting deposition

Inactive Publication Date: 2012-07-25
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used carriers are mainly precious metals such as Pt, SiO 2 , Molecular sieves, ceramics and glass and other inorganic supports, the disadvantages of these supports such as high cost, small specific surface area and low flexibility limit the large-scale application of catalysts

Method used

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  • Semiconductor hetero-junction/conductive polymer fiber membrane composite photocatalyst and preparation method thereof
  • Semiconductor hetero-junction/conductive polymer fiber membrane composite photocatalyst and preparation method thereof
  • Semiconductor hetero-junction/conductive polymer fiber membrane composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Add 3.6g of double-part A-type polysulfone, 0.41g of styrene-maleic anhydride copolymer and 0.4g of nano-graphite into a mixed solvent of 14mL of acetone and 20mL of N,N-dimethylacetamide, and stir for 24 hours. Then electrospin on a high-voltage electrospinning device to obtain a conductive polymer fiber film with a fiber diameter of 400 nm-2 μm.

[0052] Immerse the conductive polymer fiber membrane prepared above into 25mL 0.25mol L -1 of cadmium chloride and 25mL of 0.25mol·L -1 Soak in the mixed aqueous solution of tin tetrachloride for 12 hours at room temperature, so that Cd 2+ , Sn 4+ Fully complex with the carboxyl group on the surface of the conductive polymer fiber, then dry at 50°C for 6 hours under the protection of nitrogen; then place it in a 50mL hydrothermal reaction kettle, add 40mL0.25mol L -1 thioacetamide aqueous solution, heated at 120°C for 12h, cooled naturally to room temperature, took out the reaction product, put it in 50mL deionized water ...

Embodiment 2

[0057] 20 g of methacrylic acid, 60 g of hexafluorobutyl acrylate and 0.4 g of azobisisobutyronitrile were added into a three-necked flask protected with nitrogen and stirred, using butanone as a solvent, and reacted at 70° C. for 4 hours. After the reaction, precipitate in 10 times the volume of deionized water, and vacuum-dry at 60° C. to constant weight to obtain a hexafluorobutyl acrylate-methacrylic acid copolymer.

[0058] Add 5.1g of polyvinylidene fluoride, 0.78g of hexafluorobutyl acrylate-methacrylic acid copolymer and 0.1g of carbon nanotubes into 40.0g of N,N-dimethylformamide, and stir for 24h. Then electrospin on a high-voltage electrospinning device to obtain a conductive polymer fiber film with a fiber diameter of 400 nm-2 μm.

[0059] Immerse the conductive polymer fiber membrane prepared above into 25ml 0.25mol L -1 Zinc acetate and 25ml 0.25mol L -1 In the mixed solution of cadmium chloride, soak at room temperature for 20 hours, so that Zn 2+ 、Cd 2+ Ful...

Embodiment 3

[0064] Add 2.5g polyphenylene sulfone, 1.0g styrene-maleic anhydride copolymer, 0.8g polyvinylidene fluoride and 0.3g nano-carbon black to the mixed solvent of 8.0g acetone and 22.0g N, N-dimethylacetamide , stirred for 24 hours. Then, electrospinning is performed on a high-voltage electrospinning device to obtain a conductive polymer fiber film with a fiber diameter of 400 nm-2 μm.

[0065] Immerse the conductive polymer fiber membrane prepared above to 50 mL, 0.25 mol L -1 cadmium chloride aqueous solution, soaked at room temperature for 24 hours, so that Cd 2+ Fully complex with the carboxyl group on the surface of the conductive polymer fiber, and then dry at 60°C for 6 hours under the protection of nitrogen; then place it in a 50mL hydrothermal reaction kettle, add 40.0mL 0.4mol L -1 The aqueous solution of thioacetamide was reacted at 120°C for 12 hours, and cooled naturally to room temperature. The reaction product was taken out and placed in 50 mL of deionized water...

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Abstract

The invention discloses a semiconductor hetero-junction / conductive polymer fiber membrane composite photocatalyst and a preparation method of the composite photocatalyst, wherein the composite photocatalyst is obtained by loading and scattering a semiconductor hetero-junction on the surface of a conductive polymer fiber membrane by means of chemical bonds complexing; the semiconductor hetero-junction is selected from ZnS-CdS / TiO2, SnS-TiO2, PbS-TiO2, Bi2S3 / TiO2, SnS2 / TiO2, CdS / TiO2 or SnS-CdS / TiO2; and the conductive polymer fiber membrane with a fiber diameter range of 400nm to 2mum is obtained by mixing a polymer with a conductive material and performing electrostatical spinning. According to the semiconductor hetero-junction / conductive polymer fiber membrane composite photocatalyst provided by the invention, as the conductivity of conductive polymer fibers and the structure of the hetero-junction are utilized, electrons and holes are easy to separate in a sewage treating and hydrogen producing process, and the catalytic efficiency of the catalyst is improved.

Description

1. Technical field [0001] The invention relates to a composite photocatalyst capable of simultaneously degrading organic pollutants and decomposing water to produce hydrogen and a preparation method thereof, in particular to a semiconductor heterojunction that utilizes solar energy to simultaneously photocatalyze the degradation of organic pollutants and decompose water to produce hydrogen / Conductive polymer fiber film composite photocatalyst and preparation method thereof. 2. Background technology [0002] With the rapid development of the economy, energy shortage and environmental pollution have become important problems that need to be solved urgently. The development of clean new energy and renewable energy is one of the ways to solve this problem. Hydrogen energy has the advantages of cleanness, regeneration, high combustion value, and no pollution to the environment, and has attracted great attention from the industry and society. [0003] Since Fujishima et al. (Nat...

Claims

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Application Information

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IPC IPC(8): B01J31/38C01B3/04C02F1/30C02F101/30
CPCY02E60/364Y02E60/36Y02W10/37
Inventor 周正发胡伟张浩何妙妙任凤梅徐卫兵马爱勤
Owner HEFEI UNIV OF TECH
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