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Supported zinc oxide photocatalyst and preparation method thereof

A technology of photocatalyst and zinc oxide, which is applied in the field of photocatalytic materials, can solve the problems of poor reproducibility, difficult water separation, poor sedimentation performance, etc., and achieve the effects of easy recycling, good sedimentation, and easy separation

Inactive Publication Date: 2014-11-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional catalytic materials used in sewage treatment have disadvantages such as poor settling performance, difficult separation from water, and poor reproducibility.

Method used

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  • Supported zinc oxide photocatalyst and preparation method thereof
  • Supported zinc oxide photocatalyst and preparation method thereof
  • Supported zinc oxide photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Dissolve phenyltrimethoxysilane, distilled water and sodium hydroxide in isopropanol to form a homogeneous solution A, in which the concentration of phenyltrimethoxysilane in isopropanol is about 0.5mol / L, synthesize Incompletely condensed phenyl cage silsesquioxane sodium salt (DDT8ONa); synthesis conditions of this step: phenyltrimethoxysilane: water: sodium hydroxide = 4:2:2 (mass ratio); synthesis temperature is solution The reflux temperature of A; the above process is legal for hydrolysis.

[0032](2) Dissolve DDT8ONa obtained in step (1) in tetrahydrofuran to form a stable homogeneous solution B; add anhydrous acetic acid to solution B to acidify DDT8ONa, and wash with distilled water; dry with anhydrous magnesium sulfate, and filter A light yellow solution C is obtained; the solution C is dried under vacuum to obtain a white product, that is, an incompletely condensed cage polysilsesquioxane, namely 5,11,14,17-tetra(hydrogen)octaphenyltetracyclo -[7.3.3.-3]...

Embodiment 2

[0036] The difference between this example and Example 1 is that in step (3) DDT8OH: diethylzinc = 1:1.5 (molar ratio). Others are the same as in Example 1 to obtain a supported zinc oxide photocatalyst, and its nano-zinc oxide loading is 20.53%.

Embodiment 3

[0038] The difference between this example and Example 1 is that DDT8OH: diethylzinc = 1:2.5 (molar ratio) in step (3). Others were the same as in Example 1 to obtain a supported zinc oxide photocatalyst, and its nano-zinc oxide loading was 25.33%.

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Abstract

The invention relates to a supported zinc oxide photocatalyst and a preparation method of the supported zinc oxide photocatalyst, belonging to the technical field of a photocatalysed material for decomposing the organic pollutants. The photocatalyst consists of the porous silicon oxide supported zinc oxide nanoparticles, wherein the nano zinc oxide takes up 15% to 30% of the total mass. The preparation method of the supported zinc oxide photocatalyst is as follows: taking 5, 11, 14, 17-tetra (hydrogen) octaphenyltetracyclic-[7.3.3-3] octapolysilsesquioxane as an initial material, and preparing and calcining a cage polysilsesquioxane zinc compound. The zinc oxide particles of the photocatalysed material provided by the invention are very narrow in particle size distribution, and uniformly dispersed in a carrier and closely combined; a carrier material contains abundant micropores; and the photocatalyst has the advantages of being fast in reaction speed, high in catalytic activity, good in settleability, liable to disperse in the water, separate from water and recover and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials used for decomposing organic pollutants, in particular to a porous silicon oxide-supported nano zinc oxide photocatalyst and a preparation method thereof. Background technique [0002] Due to its unique size effect and surface characteristics, nano-zinc oxide has some special properties in terms of light and electricity. Under the irradiation of ultraviolet light, zinc oxide has the function of photocatalyst, and its catalytic performance is stronger after nanometerization, which can effectively decompose organic substances, thus playing the role of purifying water quality. [0003] Porous silica materials have abundant voids and high specific surface area, and the most common ones include silica gel and zeolite. Due to its large number of voids and high specific surface area, it has strong interaction with adsorbate and short adsorption equilibrium time. Therefore, it is often ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06C02F1/30
Inventor 张春玲李昂江春梅
Owner JILIN UNIV