Short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst as well as preparation method and application thereof

A mesoporous silica, short pore technology, applied in physical/chemical process catalysts, chemical instruments and methods, silicon compounds, etc., to achieve the effects of enhanced absorption and utilization, improved adsorption, and easy mass transfer and diffusion

Active Publication Date: 2016-11-16
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the diffusion and transmission of VOCs in the pores in the prior art, and to provide a short-channel ordered mesoporous silicon oxide-sulfur indium with strong adsorption performance and photocatalytic activity The preparation method of the zinc composite photocatalyst can solve the problem that the reactant can quickly diffuse on the surface of the catalyst, quickly reach the active site of the catalyst, and greatly improve its catalytic activity

Method used

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  • Short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation:

[0031] S1. Add 0.1g of polyethylene glycol to 6mL of water and concentrated hydrochloric acid solution with a volume ratio of 10:1, and stir at 90°C for 24h to obtain a clear solution;

[0032] S2. Mix 10mL tetraethyl orthosilicate, 50mgZrOCl 2 , 20 mg of zinc chloride, 60 mg of indium chloride and 30 mg of thiourea were slowly added to the clear solution obtained in step S1 in sequence, and stirred at 30° C. for 2 hours to obtain a white turbid solution;

[0033] S3. Put the white turbid solution obtained in step S2 into a 25mL polytetrafluoroethylene tank, and conduct a hydrothermal reaction at 60°C for 72h. After cooling in the polytetrafluoroethylene tank, collect the precipitate, rinse the precipitate with 50mL of water, wash The final precipitate was dried at 50°C for 36 hours to obtain short-channel ordered mesoporous silica;

[0034] S4. Mix the short-channel ordered mesoporous silica obtained in S3 with methanol at a ratio of 0.1mg / mL, ultra...

Embodiment 2

[0037]S1. Add 10g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer to 100mL of water and concentrated hydrochloric acid solution with a volume ratio of 1:1, and stir at 30°C for 24h to obtain clear solution;

[0038] S2. Mix 0.1mL tetraethyl orthosilicate, 500mgZrOCl 2 , 200 mg of zinc nitrate, 400 mg of indium nitrate and 30 mg of urea were slowly added to the clear solution obtained in step S1 in sequence, and stirred at 90° C. for 72 hours to obtain a white turbid solution;

[0039] S3. Put the white turbid solution obtained in step S2 into a 200mL polytetrafluoroethylene tank, and conduct a hydrothermal reaction at 250°C for 2 hours. After cooling in the polytetrafluoroethylene tank, collect the precipitate, wash the precipitate with 2000mL water, wash The final precipitate was dried at 180°C for 1 hour to obtain short-channel ordered mesoporous silica;

[0040] S4. Mix the short-channel ordered mesoporous silica obtained in step S3 with et...

Embodiment 3

[0042] S1. Add 5g of cetyltrimethylammonium bromide to 80mL of water and concentrated hydrochloric acid solution with a volume ratio of 5:1, and stir at 50°C for 6h to obtain a clear solution;

[0043] S2. Mix 2mL tetraethyl orthosilicate, 100mgZrOCl 2 , 150 mg of zinc sulfate, 200 mg of indium sulfate and 190 mg of thioacetamide were slowly added to the clear solution obtained in step S1 in sequence, and stirred at 50° C. for 12 hours to obtain a white turbid solution;

[0044] S3. Put the white turbid solution obtained in step S2 into a 100mL polytetrafluoroethylene tank, and conduct a hydrothermal reaction at 120°C for 18 hours. After cooling in the polytetrafluoroethylene tank, collect the precipitate, wash the precipitate with 1000mL water, The final precipitate was dried at 100°C for 8 hours to obtain short-channel ordered mesoporous silica;

[0045] S4. Mix the short-channel ordered mesoporous silica obtained in step S3 with ethanol at a ratio of 0.5 mg / mL, ultrasonica...

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Abstract

The invention discloses a short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst as well as a preparation method and application thereof. The short-hole-channel ordered mesoporous silica-sulfur-indium-zinc composite photocatalyst is prepared through the following steps of mixing ethyl orthosilicate with ZrOCl2, zinc salt, indium salt and a reducing agent so as to obtain a mixture, in the presence of a surfactant, sequentially performing sol-gel treatment, hydrothermal treatment and alcohol ultrasonic treatment, performing sucking filtration, performing cleaning and performing drying. According to the photocatalyst, the integration of adsorption and photocatalytic oxidation is realized, the photocatalyst has high adsorption properties and high photocatalytic activity on volatile organic compounds (VOCs), and hydroxyl radicals produced on the surface of a catalyst can effectively degrade the VOCs adsorbed and enriched by materials in an in-situ manner, so that the reaction rate and the reaction efficiency of photocatalytic degradation on the VOCs can be substantially improved, the photocatalyst can be used as an adsorbent or the photocatalyst for organic contaminants in the field of environmental protection, and the photocatalyst has wide environmental protection application potential.

Description

technical field [0001] The invention belongs to the technical field of adsorption-type catalytic materials, and more specifically relates to a short-channel ordered mesoporous silicon oxide-sulfur indium zinc composite photocatalyst and its preparation method and application. Background technique [0002] Volatile organic compounds (Volatile organic compounds, VOCs) have brought us a large number of environmental problems, but also seriously threaten the safety of human life. Because photocatalytic oxidation technology can oxidize VOCs to CO in the presence of light irradiation and catalyst. 2 and H 2 O, and received widespread attention. At present, some reported semiconductor photocatalysts can only show activity under the excitation of ultraviolet light in sunlight (ultraviolet light only accounts for about 5% of the total energy of sunlight), which greatly limits their practical applications. Thus, A large number of researchers have begun to devote themselves to the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30B01J27/04B01J35/00B01D53/86B01D53/72
CPCB01D53/02B01D53/8668B01D2257/708B01J20/024B01J20/0248B01J20/0262B01J20/103B01J27/04B01J35/004B01J2220/42
Inventor 陈江耀安太成刘宏利李桂英
Owner GUANGDONG UNIV OF TECH
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