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Composite photocatalyst membrane material with hierarchical pore structure and preparation method thereof

A technology of composite photocatalysis and catalyst film, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of destroying the structure of carbon nanotubes and affecting electrical conductivity, etc. Performance and other issues

Inactive Publication Date: 2013-04-24
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the reports usually use the wet method to prepare CNTs / TiO 2 Composite membrane, it is necessary to pre-treat the surface of CNTs to make the tube wall with grafted groups, and then combine with TiO 2 compound, but the strong acid oxidation pretreatment of CNTs will destroy the structure of carbon nanotubes, thus affecting their electrical conductivity and other properties

Method used

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  • Composite photocatalyst membrane material with hierarchical pore structure and preparation method thereof
  • Composite photocatalyst membrane material with hierarchical pore structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Preparation of ZnO / TiO Containing Porogens by Sol-Gel Method 2 Sol (Zn:Ti=0.2, molar ratio), weighed 2.0g F127 and 1.0g CTAB, dissolved in 37.70ml absolute ethanol, added dropwise 2.68g nitric acid, and then slowly added dropwise 6.80g tetrabutyl titanate and 0.88g zinc acetate, stir to obtain solution A; 0.15g Cu(NO 3 ) 2 ·3H 2 O and 0.17g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 21.50 ml of deionized water to obtain solution B. Add solution B dropwise to solution A, stir for 1 hour to obtain solution C, and let it stand for 10 hours to obtain ZnO / TiO containing porogen P123 and CTAB and doped with copper and nickel 2 Precursor spray liquid.

[0028] Preparation of ZnO / TiO by Spray Pyrolysis 2 Composite membrane: place the cleaned ITO on a hot stage at 350 ° C, and the above ZnO / TiO 2 The precursor spray liquid was injected into the nozzle at a rate of 0.5ml / min, and 2 (0.4L / h) under the action of spraying, spraying 5 times, the preparation of ITO loaded ZnO / TiO ...

Embodiment 2

[0034] Preparation of ZnO / TiO by Sol-Gel Method 2 Sol (Zn:Ti=1:1, molar ratio), weigh 2.5g P123 and 0.2g PMMA, dissolve in 37.70ml absolute ethanol, add 2.68g nitric acid dropwise, then slowly add 6.80g tetrabutyl titanate and 4.4g zinc acetate, stir to obtain solution A; 0.04gFe(NO 3 ) 3 9H 2 O and 0.25g Co(NO 3 ) 2 ·6H 2 O was dissolved in 21.50 ml of deionized water to obtain solution B. Add solution B dropwise to solution A, stir for 2 hours to obtain solution C, and after standing for 48 hours, obtain TiO containing P123 and doped with iron and cobalt 2 Precursor gel. Using the scraper method, the gel was assembled on the Ni sheet, and then the Ni sheet was placed in a muffle furnace, heated to 350°C at a rate of 3°C / min, baked for 3 hours, and then heated to 500°C at a rate of 5°C / min. ℃, baked for 3 hours.

[0035] ZnO / TiO modified by co-doping the above transition metal iron and cobalt 2 The composite membrane is placed in a fixed bed reactor. The reactor wa...

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Abstract

The invention relates to a composite photocatalyst membrane material with a hierarchical pore structure and a preparation method thereof. A basal body of the composite photocatalyst membrane material is a transition a metal-doped hierarchical porous TiO2 and ZnO compound semiconductor membrane material membrane. The preparation method comprises the following steps: firstly preparing a TiO2 and ZnO compound photocatalyst precursor containing pore-forming agents P123, F127, PMMA (Polymethyl Methacrylate), PEG (Polyethylene Glycol), CTAB (Cetylt Trimethyl Ammonium Bromide) and transition metal Fe, Ni. Co, Mo, Cu, Pt, Au, Pd and Ag; then assembling the transition metal-modified ZnO / TiO2 hierarchical porous composite photocatalyst membrane material on FTO (Fluorinedoped Tin Oxide), ITO (Indium Tin Oxide) and Ni sheets and other carriers through a spray pyrolysis method, a dip-coating method, a spin-coating method, a silk-screen printing method, a doctor blade method and other coating methods; and finally, directly carrying out in-situ growth on a carbon nano tube on the composite photocatalyst membrane material through a chemical vapor deposition method. The hierarchical porous composite photocatalyst membrane material has the advantages of high photocatalytic activity, stable membrane binding, simple preparation process and easiness in industrialization realization.

Description

【Technical field】 [0001] The invention relates to the technical field of nano photocatalysis and environmental protection, in particular to a composite photocatalyst membrane material with a multi-level hole structure and a preparation method thereof. 【Background technique】 [0002] Environmental pollution is a huge challenge facing mankind. Nano titanium dioxide (TiO 2 ) photocatalysis has broad application prospects in the treatment of environmental pollutants. However, on the one hand, TiO 2 The photocatalytic activity of TiO is mainly affected by the recombination of photogenerated electrons and holes. 2 The time required for the chemical interaction with the organic pollutants adsorbed on its surface is much longer than the recombination time of photogenerated electrons and holes, resulting in the TiO 2 low photocatalytic activity. On the other hand, TiO 2 Belonging to wide-bandgap semiconductors, they can only absorb ultraviolet light and cannot effectively use s...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J23/835B01J35/10C02F1/30
Inventor 张哲吕慧何洪波陈爱平曾炽涛马磊夏淼
Owner EAST CHINA UNIV OF SCI & TECH
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