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A kind of preparation method of efficient mesoporous zinc oxide photocatalyst

A photocatalyst, zinc oxide technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve high pore volume, high photocatalytic activity, and good photocatalytic performance Effect

Active Publication Date: 2019-12-31
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there have been no reports on the preparation of ZnO photocatalysts using metal-organic frameworks (MOFs) as templates.

Method used

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Examples

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Effect test

preparation example Construction

[0017] A kind of preparation method of high-efficiency mesoporous zinc oxide photocatalyst of the present invention, this preparation method comprises following specific operation steps:

[0018] (1) Preparation of modified MOF-Ti powder: Weigh terephthalic acid, dissolve it in N,N-dimethylformamide (as a solvent), and then add cellulose nanocrystals and n-butyl titanate in sequence , and make the cellulose nanocrystal account for 1-5% of the total mass of terephthalic acid and n-butyl titanate, the molar ratio of terephthalic acid and n-butyl titanate is 4:1, stir at 25°C for 30 -60min; then transfer to a polytetrafluoroethylene reactor, react at 120-180°C for 24-48 hours, then cool to 25°C, use a refrigerated centrifuge at 5000-8000r / min, and sequentially wash with DMF Two times, centrifugal washing with absolute ethanol twice to obtain the crude product of modified MOF-Ti, and finally vacuum-dried at 40°C for 24 hours to obtain white solid powder, namely modified MOF-Ti pow...

Embodiment 1

[0023] Weigh 1g of terephthalic acid, dissolve it in 30mL of N,N-dimethylformamide, then add cellulose nanocrystals (cotton cellulose nanocrystals) and n-butyl titanate in sequence, and make the cellulose nanocrystals Accounting for 3% of the total mass of terephthalic acid and n-butyl titanate, the molar ratio of terephthalic acid and n-butyl titanate is 4:1, stirred at 25°C for 30min; then transferred to 100mL polytetrafluoroethylene In an ethylene reactor, react at 150°C for 35 hours, then cool to 25°C, and use a refrigerated centrifuge at 5000r / min to wash twice with DMF and twice with absolute ethanol to obtain the modified MOF. The crude product of -Ti was finally vacuum-dried at 40°C for 24 hours to obtain a white solid powder, i.e. modified MOF-Ti powder, which was stored in a desiccator until use;

[0024] Measure 11 mL of 0.05 mol / L zinc acetate aqueous solution, add 0.1 g of the prepared modified MOF-Ti powder, and stir magnetically at 600 r / min at 25 °C for 10 min;...

Embodiment 2

[0026] Weigh 2g of terephthalic acid, dissolve it in 40mL of N,N-dimethylformamide, then add cellulose nanocrystals (wood pulp cellulose nanocrystals) and n-butyl titanate in sequence, and make the cellulose nanocrystals Crystals accounted for 1% of the total mass of terephthalic acid and n-butyl titanate, the molar ratio of terephthalic acid and n-butyl titanate was 4:1, stirred at 25°C for 60min; then transferred to 100mL polytetrafluoroethylene In the vinyl fluoride reaction kettle, react at 180°C for 24 hours, then cool to 25°C, use a refrigerated centrifuge at 6000r / min, and then use DMF to wash twice and absolute ethanol twice to obtain the modified The crude product of MOF-Ti was finally vacuum-dried at 40°C for 24 hours to obtain a white solid powder, i.e. modified MOF-Ti powder, which was stored in a desiccator until use;

[0027] Measure 110mL of 0.05mol / L zinc acetate aqueous solution, add 0.1g of the prepared modified MOF-Ti powder, and stir magnetically at 500r / min ...

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Abstract

The invention provides a method for preparing a high-efficiency mesoporous zinc oxide photocatalyst, which uses terephthalic acid, N,N-dimethylformamide, cellulose nanocrystals and n-butyl titanate as raw materials to prepare modified modified MOF-Ti powder; and the zinc oxide photocatalyst prepared using modified MOF-Ti powder as a template is environmentally friendly and broadens the preparation methods for zinc oxide photocatalysts. It not only has high specific surface area, high pore volume, high efficiency It has mesoporous characteristics and high photocatalytic activity, that is, it shows good photocatalytic performance; in addition, it also has the characteristics of simple preparation process.

Description

【Technical field】 [0001] The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of an efficient mesoporous zinc oxide photocatalyst. 【Background technique】 [0002] With the rapid development of the global economy and the overexploitation of resources, there are less and less fossil energy available for human use, the energy problem is becoming more and more serious, the ecological balance is seriously damaged, and the living environment of human beings is deteriorating day by day. Therefore, the control of environmental pollution, the development of new clean energy and the realization of sustainable economic development have become common problems to be solved urgently by human society. Semiconductor photocatalysis technology can directly convert light energy into chemical energy and promote the synthesis and degradation of compounds. It has the advantages of low energy consumption, high efficiency, no secondary pollution an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J35/10C02F1/32C02F101/30
CPCC02F1/32B01J23/06C02F2101/308B01J35/61B01J35/63B01J35/647B01J35/39
Inventor 肖禾张伟波韦懿萃吴慧陈礼辉黄六莲
Owner FUJIAN AGRI & FORESTRY UNIV
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