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Preparation method of ceramic membrane loaded zinc oxide photocatalyst

A technology of photocatalyst and ceramic membrane, which is applied in the field of catalysis to achieve the effects of improving activity, avoiding separation of catalyst and product, and simple preparation process

Active Publication Date: 2016-03-16
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on membrane-supported zinc oxide photocatalysts, and most of them use glass or zinc plates as carriers to prepare zinc oxide photocatalysts. Therefore, this patent loads zinc oxide on ceramic membranes, and the size and shape of catalytically active components Effectively control and improve its catalytic performance

Method used

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  • Preparation method of ceramic membrane loaded zinc oxide photocatalyst
  • Preparation method of ceramic membrane loaded zinc oxide photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Measure 7.3384g of anhydrous zinc acetate and 2.4mL of ethanolamine into 80mL of ethylene glycol methyl ether, stir at 60°C for 40min to prepare a seed crystal growth solution with a concentration of 0.5mol / L. Soak Al in deionized water 2 o 3 Membrane tube, the length of the membrane tube is 6cm, the outer diameter is 12mm, the inner diameter is 8mm, the membrane pore diameter is 5000nm, and it is dried for later use. Fix the membrane tube on the immersion pulling machine, control the pulling speed to 3200 μm / s, and the immersion time to 10s. Then the ceramic membrane tube was placed in a muffle furnace and calcined at 600° C. for 40 min, and calcined twice. Weigh 1.7849g of zinc nitrate hexahydrate and 0.4206g of hexamethyleneimine into 160mL of deionized water, stir at room temperature for 40min to prepare a hydrothermal solution with a zinc nitrate hexahydrate concentration of 0.075mol / L (amine-zinc molar ratio 0.5:1), while adding 0.45 mL of 1,3-propylenediamine ...

Embodiment 2

[0028] Measure 9.6327g of anhydrous zinc acetate and 3.1mL of ethanolamine into 70mL of ethylene glycol methyl ether, stir at 60°C for 40min to prepare a seed crystal growth solution with a concentration of 0.75mol / L. Soak TiO with deionized water 2 Membrane tube, the length of the membrane tube is 6cm, the outer diameter is 12mm, the inner diameter is 8mm, the membrane pore diameter is 500nm, and it is dried for later use. Fix the film tube on the immersion pulling machine, control the pulling speed to 2500 μm / s, and the immersion time to 20s. Then the ceramic membrane tube was placed in a muffle furnace, and calcined at 300° C. for 20 min, and calcined three times. Weigh 1.1899g of zinc nitrate hexahydrate and 1.0134g of hexamethyleneimine into 80mL of deionized water, stir at room temperature for 40min to prepare a hydrothermal solution with a zinc nitrate hexahydrate concentration of 0.1mol / L (amine-zinc molar ratio 2:1), while adding 0.35 mL of 1,3-propylenediamine (the...

Embodiment 3

[0031] Measure 3.2109g of anhydrous zinc acetate and 1mL of ethanolamine into 70mL of ethylene glycol methyl ether, stir at 60°C for 40min to prepare a seed crystal growth solution with a concentration of 0.25mol / L. Soak ZrO in deionized water 2 , the length of the membrane tube is 6cm, the outer diameter is 12mm, the inner diameter is 8mm, the membrane pore diameter is 5nm, and it is dried for later use. Fix the membrane tube on the immersion pulling machine, control the pulling speed to 3000 μm / s, and the immersion time to 15s. Then the membrane tube was placed in a muffle furnace and calcined at 400° C. for 60 min, and calcined four times. Weigh 0.8929g of zinc nitrate hexahydrate and 0.6304g of hexamethyleneimine into 80mL of deionized water, stir at room temperature for 40min to prepare a hydrothermal solution with a zinc nitrate hexahydrate concentration of 0.075mol / L (amine-zinc molar ratio 1.5:1), while adding 0.5 mL of 1,3-propylenediamine (the molar ratio of 1,3-pr...

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Abstract

The invention relates to a preparation method of a ceramic membrane loaded zinc oxide photocatalyst, and belongs to the technical field of catalysis. A ceramic membrane acts as a carrier of the catalyst. The preparation method comprises the following steps: loading a layer of zinc oxide nano seed crystals on the surface of the ceramic membrane by adopting a dip-coating calcination method, and then preparing the ceramic membrane loaded zinc oxide photocatalyst by a hydrothermal method. The preparation method of the ceramic membrane loaded zinc oxide photocatalyst has the advantages that the photocatalyst is loaded to the surface of the ceramic membrane so as to prevent the problem of subsequent separation difficulty of the catalyst and a product. The catalyst is simple in preparation technology, is high in photocatalysis performance, and can be well applied to the catalytic degradation process.

Description

technical field [0001] The invention relates to a method for preparing a supported catalyst, in particular to a method for preparing a photocatalyst, and belongs to the technical field of catalysis. Background technique [0002] As a photocatalyst with excellent performance, nano-ZnO has the same band gap as nano-TiO 2 It is similar, and the preparation operation is simple and the price is low, so it has attracted more and more attention in the field of photocatalysis. There are two ways of photocatalyst application: suspension state and supported type. Although the photocatalytic method in the suspension state has the advantages of high reaction rate, relatively easy reactor design, and convenient process operation, due to the small particle size of nano-semiconductors, it is difficult to separate and recover solids and liquids, resulting in increased processing costs, which are limited in practical applications. . The supported photocatalytic method can solve the proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/00B01J37/02B01J37/10B01J37/08
CPCB01J23/06B01J37/0228B01J37/08B01J37/10B01J35/39
Inventor 杜艳顾冬冬王春宇陈日志
Owner NANJING UNIV OF TECH
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