Preparation method of efficient mesoporous zinc oxide photocatalyst

A photocatalyst, zinc oxide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve the effects of high pore volume, widening of preparation routes, and simple preparation process

Active Publication Date: 2018-05-11
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology provides an improved catalyst for use with light (photons). Its advantages include environmental friendliness compared to existing materials while still having excellent properties such as increased pores size or ability to absorb more visible wavelength radiation than previous alternatives like TiO2.

Problems solved by technology

This patents discusses various technical means aimed towards creation of controlled and reproducible processes for producing highly pure metallic photocatalysts through efficient utilizing greenhouse gas emissions during production process. Current techniques involve either traditional hydrocracking/solvothermal decomposition of heavy oils or pyrolysis of coal, which result in poor selective product formation and reduced performance compared to alternative technologies such as sunlight activation and water electrodeposition. To address this issue, some recent efforts include developing novel ways to prepare ZnON photochemistry catalysts based on these framework structures.

Method used

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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, finally vacuum-dried at 40°C for 24 hours to obtain a white solid powder that is the modified MOF-Ti powder, which is 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 mi...

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 preparation method of an efficient mesoporous zinc oxide photocatalyst. The method comprises the steps that terephthalic acid, N,N-dimethylformamide, cellulose nanocrystallineand titanium tetrabutoxide are adopted as raw materials, and modified MOF-Ti powder is prepared; zinc oxide photocatalyst obtained by adopting the modified MOF-Ti powder as a template is environmentally friendly, the preparation way of the zinc oxide catalyst is enlarged, the method has the advantages of being high in specific surface area and pore volume and including efficient mesoporous, the photocatalytic activity is high, and the displayed photocatalytic performance is shown; in addition, the method has the advantage that the preparation technology is simple.

Description

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Claims

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Application Information

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Owner FUJIAN AGRI & FORESTRY UNIV
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