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Method for preparing carbon fiber loaded composite photocatalysis membrane

A composite photocatalysis and carbon fiber technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high-temperature sintered carrier structures that are easily broken and difficult to recycle, etc. problem, to achieve excellent photocatalytic effect and control the effect of easy cracking

Inactive Publication Date: 2009-08-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of difficult recycling and high-temperature sintering carrier structure easy to damage the composite photocatalytic materials based on activated carbon particles and activated carbon fibers

Method used

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  • Method for preparing carbon fiber loaded composite photocatalysis membrane
  • Method for preparing carbon fiber loaded composite photocatalysis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Select PAN-based carbon fiber and put it into a reaction vessel, and add 65%-68% concentrated nitric acid, wherein the mass ratio of carbon fiber to concentrated nitric acid is 0.8:100, and the volume of the reaction solution is 2:6 of the volume of the reaction vessel in an oil bath Heating, condensing and refluxing for 3 hours, taking it out and washing it with deionized water to pH 6-7, wherein the diameter of the single fiber is 4-6 μm;

[0017] 2) Immerse the treated fiber in 10g / L SnCl 2 solution for 10-20min, in which fiber and SnCl 2 The bath ratio of the solution is 1:250, take it out and dry it, then impregnate it in 0.2g / L PdCl 2 10-20min in the solution, in which fiber and PdCl 2 The bath ratio of the solution is 1:20, and it is dried in an oven at 40-60°C for 1 hour;

[0018] 3) Prepare titanium sol with isopropyl titanate as a precursor, propylene glycol as a solvent, and hydrochloric acid as a hydrolysis inhibitor, wherein the molar ratio of isoprop...

Embodiment 2

[0020] 1) Select PAN-based carbon fiber and put it into a reaction vessel, and add 65%-68% concentrated nitric acid, wherein the mass ratio of carbon fiber to concentrated nitric acid is 1.3:100, and the volume of the reaction solution is 2:7 of the volume of the reaction vessel in an oil bath Heating, condensing and refluxing for 6 hours, taking it out and washing it with deionized water until the pH is 6-7, and the diameter of the single fiber is 4-6 μm;

[0021] 2) Immerse the treated fiber in 10g / L SnCl 2 solution for 10-20min, in which fiber and SnCl 2 The bath ratio of the solution is 1:500, take it out and dry it and then impregnate it in 0.5g / L PdCl 2 10-20min in the solution, in which fiber and PdCl 2 The bath ratio of the solution is 1:100, and it is dried in an oven at 40-60°C for 2 hours;

[0022] 3) Prepare titanium sol with isopropyl titanate as a precursor, propylene glycol as a solvent, and hydrochloric acid as a hydrolysis inhibitor, wherein the molar ratio...

Embodiment 3

[0024] Select PAN-based carbon fiber and put it into the reaction vessel, and add 65%-68% concentrated nitric acid, wherein the mass ratio of carbon fiber to concentrated nitric acid is 1.3:100, and the volume of the reaction solution is 2:7 of the volume of the reaction vessel. Heating in an oil bath Condensate and reflux for 6 hours, take it out and wash it with deionized water until the pH is 6-7, and the diameter of the single fiber is 4-6 μm;

[0025] 2) Immerse the treated fiber in 10g / L SnCl 2 solution for 10-20min, in which fiber and SnCl 2 The bath ratio of the solution is 1:500, take it out and dry it and then impregnate it in 0.5g / L PdCl 2 10-20min in the solution, in which fiber and PdCl 2 The bath ratio of the solution is 1:100, and it is dried in an oven at 40-60°C for 2 hours;

[0026] 3) Prepare titanium sol with isopropyl titanate as a precursor, propylene glycol as a solvent, and hydrochloric acid as a hydrolysis inhibitor, wherein the molar ratio of isopr...

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Abstract

The invention discloses a method for preparing a carbon fiber loaded composite photocatalysis membrane. After the surface of matrix carbon fiber is subjected to oxidization treatment, palladium is deposited on the surface of the carbon fiber through oxidization-reduction technology, and a composite photocatalysis membrane is loaded on PAN-based carbon fiber through a sol-gel method, overheated vapor drying technology and high temperature treatment, wherein the overheated vapor is used as a water source of titanic acid hydrolysis and used as a dry heat medium. By adopting a two-step heat treatment method of overheated vapor drying and hot air high-temperature annealing, or adopting the overheated vapor throughout the process, the phenomenon that a titanium dioxide membrane prepared by the sol-gel method is easy to crack is controlled, and a carbon fiber loaded complex-phase photocatalysis material with smooth and crack-free surface and good photocatalysis effect is prepared.

Description

technical field [0001] The invention relates to a preparation method of a carbon fiber supported composite photocatalytic film. Background technique [0002] Currently, powdered TiO 2 Photocatalysts are easy to condense and deactivate in water, and there are engineering problems such as difficult separation and recovery after use, which limits their practical application. Preparation of supported TiO 2 The proposal of photocatalytic materials overcomes the shortcomings of photocatalysts in practical applications. Suitable carrier selection is the preparation of supported TiO 2 The key to photocatalytic materials. Carbonaceous materials have the advantages of strong adsorption, large specific surface area, and good stability, so they have become a hot research topic in this field. There are two main types of commonly used carbonaceous materials, one is activated carbon particles, the carrier itself exists in the form of fine particles, so the complex still has problems s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01J21/06B01J21/18B01J35/02B01J35/00
Inventor 傅雅琴朱曜峰丁艳杰石琢
Owner ZHEJIANG SCI-TECH UNIV
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