Preparation method for zeolite-immobilized photocatalyst

A photocatalyst and zeolite technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as destruction of natural substances and environmental damage, and achieve low price, high utilization rate, and high product yield. Effect

Active Publication Date: 2017-02-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, conventional photocatalysts are nano-particles, and direct use will cause damage to the environment, and the free radicals generated will degrade indiscriminately, which will destroy the original natural substances in the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 0.1g C 3 N 4 Disperse in 80ml of deionized water, then add fine silica gel 10 times the mass of the photocatalyst, stir for 6 hours, take out the reaction product, wash it first, then dry it, then add tetrapropylammonium chloride, aluminum oxide, templating agent, The molar ratio of aluminum source and silicon source is 5:0.6:10. After grinding, put it into the reaction kettle, 100 ℃ solid-phase crystallization for 24 hours, wash and dry, and bake in a muffle furnace at 400 ℃ for 4 hours to burn off the template agent, and finally obtain the zeolite-supported photocatalyst, in which C 3 N 4 The mass fraction is 0.01%, the silicon-aluminum ratio is 15, and the specific surface area is 50m 2 / g.

Embodiment 2

[0024] 0.08g C 3 N 4 Disperse in 80ml of deionized water, then add tetraethyl orthosilicate 15 times the mass of the photocatalyst, stir for 10 hours, take out the reaction product, wash it first, then dry it, then add tetrapropylammonium hydroxide, aluminate The molar ratio of sodium, template agent, aluminum source and silicon source is 0.01:0.6:10. After grinding, put it into the reaction kettle, 120 ℃ solid-phase crystallization for 96 hours, wash and dry, and bake in a muffle furnace at 400 ℃ for 6 hours to burn off the template agent, and finally obtain the zeolite-supported photocatalyst, in which C 3 N 4 The mass fraction is 0.8%, the silicon-aluminum ratio is 22, and the specific surface area is 200m 2 / g.

Embodiment 3

[0026] 0.15g C 3 N 4 Disperse in 80ml of deionized water, then add white carbon black 20 times the mass of the photocatalyst, stir for 24 hours, take out the reaction product, wash it first, then dry it, then add tetrapropylammonium bromide, template agent, silicon source The molar ratio is 10:10. After grinding, put it into the reaction kettle, solid-phase crystallize at 200°C for 168 hours, wash and dry it, and bake it in a muffle furnace at 600°C for 10 hours to burn off the template agent, and finally obtain the zeolite-supported photocatalyst. 3 N 4 The mass fraction is 3%, the silicon-aluminum ratio is ∞, and the specific surface area is 1000m 2 / g.

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Abstract

The invention relates to preparation technology of a photocatalyst and aims to provide a preparation method for a zeolite-immobilized photocatalyst. The preparation method comprises the following steps: dispersing a photocatalyst in deionized water, then adding a silicon source and carrying out a reaction under stirring; taking a reaction product out for washing and drying, subjecting the dried reaction product to mixing with a template and an aluminum source and then carrying out grinding; filling a reaction vessel with a mixture obtained in the previous step and carrying out solid-phase crystallization so as to produce a carrier with a zeolite structure; and washing and drying the carrier and then carrying out sintering in a muffle furnace to remove the template so as to obtain the zeolite-immobilized photocatalyst. According to the method, the usage amount of the template is low; due to improvement of the preparation method, the photocatalyst can be perfectly enveloped in a zeolite monocrystal, and the content of the photocatalyst is controllable; raw materials used in the method is low, and preparation process is simple; and in subsequent application, the utilization rate of the photocatalyst is high, the yield of the zeolite-immobilized photocatalyst is high, and the zeolite-immobilized photocatalyst has high organic pollutant degradation rate and exerts good protection effect on natural substances.

Description

technical field [0001] The invention relates to photocatalyst preparation technology, in particular to a preparation method of zeolite immobilized photocatalyst. Background technique [0002] With the progress of human society, fossil fuels are burned in large quantities, and the energy problem is becoming more and more serious. Therefore, mankind urgently needs to use new energy to solve the energy crisis and achieve sustainable development. Sunlight is a new type of renewable energy, making full use of sunlight can solve the energy crisis that may exist in the future. At present, a variety of effective photocatalysts have been developed. They have good stability, high photocatalytic activity, and can completely decompose and mineralize organic matter under normal temperature and pressure. Therefore, they have attracted the attention of researchers. [0003] However, conventional photocatalysts are nano-particles, and direct use will cause damage to the environment, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/06B01J29/068B01J29/076C02F1/30
CPCB01J29/03B01J29/06B01J29/068B01J29/076B01J35/004B01J2229/18C02F1/30C02F2305/10
Inventor 王亮马润苑肖丰收
Owner ZHEJIANG UNIV
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