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Method for rapidly synthesizing molecular sieve supported nanometer photocatalyst

A nano-photocatalyst and photocatalyst technology, applied in the field of environmental governance, can solve problems such as time-consuming, high energy consumption, and reduced catalyst activity, and achieve an effect that is conducive to conduction

Inactive Publication Date: 2017-12-08
AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the synthesis process of molecular sieve-supported photocatalysts, due to the particularity of the pores, it is easy to be blocked by the catalyst, resulting in a large number of nanoparticles agglomerated on the surface of the molecular sieve, which reduces the activity of the catalyst.
In addition, the synthesis process of the traditional impregnation and calcination method takes a long time and consumes a lot of energy.

Method used

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  • Method for rapidly synthesizing molecular sieve supported nanometer photocatalyst
  • Method for rapidly synthesizing molecular sieve supported nanometer photocatalyst
  • Method for rapidly synthesizing molecular sieve supported nanometer photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the SBA-15 powder and put it in an oven to bake to remove the impurities adsorbed in the pores of the molecular sieve. Add 1 g of SBA-15 to 20 mL of absolute ethanol and glacial acetic acid for ultrasonic dispersion for 10 minutes, then add the titanium dioxide precursor drop by drop, place the mixture in a negative pressure system, and use the capillary force of the molecular sieve mesoporous to dissolve the titanium dioxide precursor absorbed into the pores. After stirring for 1 hour under magnetic stirring conditions, the mixed liquid was transferred to a 70 mL polytetrafluoroethylene-lined hydrothermal reactor, and then placed in a microwave digestion apparatus (MDS-6, Shanghai, China) at 180 o C temperature for 30 minutes to synthesize TiO 2 / SBA-15. A certain amount of 1-hexanol and chloroauric acid solution (10 mg / mL) was added dropwise to TiO 2 In / SBA-15, the mixed liquid is placed in a negative pressure system, and the precursor of metal nanoparticles ...

Embodiment 2

[0021] Take the SBA-15 powder and put it in an oven to bake to remove the impurities adsorbed in the pores of the molecular sieve. Add 1 g of SBA-15 to 20 mL of absolute ethanol and glacial acetic acid for ultrasonic dispersion for 10 minutes, then add the titanium dioxide precursor drop by drop, place the mixture in a negative pressure system, and use the capillary force of the molecular sieve mesoporous to dissolve the titanium dioxide precursor absorbed into the pores. After stirring for 1 hour under magnetic stirring conditions, the mixed liquid was transferred to a 70 mL polytetrafluoroethylene-lined hydrothermal reactor, and then placed in a microwave digestion apparatus (MDS-6, Shanghai, China) at 180 o C temperature for 30 minutes to synthesize TiO 2 / SBA-15. A certain amount of 1-hexanol and chloroplatinic acid solution was added dropwise to TiO 2 In / SBA-15, the mixed liquid is placed in a negative pressure system, and the precursor of metal nanoparticles is sucke...

Embodiment 3

[0023] Take the SBA-15 powder and put it in an oven to bake to remove the impurities adsorbed in the pores of the molecular sieve. Add 1 g of SBA-15 to 20 mL of absolute ethanol and glacial acetic acid for ultrasonic dispersion for 10 minutes, then add the titanium dioxide precursor drop by drop, place the mixture in a negative pressure system, and use the capillary force of the molecular sieve mesoporous to dissolve the titanium dioxide precursor absorbed into the pores. After stirring for 1 hour under magnetic stirring conditions, the mixed liquid was transferred to a 70 mL polytetrafluoroethylene-lined hydrothermal reactor, and then placed in a microwave digestion apparatus (MDS-6, Shanghai, China) at 180 o C temperature for 30 minutes to synthesize TiO 2 / SBA-15. A certain amount of 1-hexanol and silver nitrate solution was added dropwise to TiO 2 In / SBA-15, the mixed liquid is placed in a negative pressure system, and the precursor of metal nanoparticles is sucked int...

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Abstract

The invention discloses a method for rapidly synthesizing a molecular sieve supported nanometer photocatalyst, belonging to the technical field of photocatalysis. The method comprises the steps of adsorbing titanium dioxide and a precursor of metal nanoparticles by virtue of a capillary force of mesopores of a molecular sieve in a negative pressure environment, and supplementing a microwave-assisted alcohol thermal reduction method, so as to rapidly obtain the molecular sieve supported nanometer photocatalyst with high catalytic activity and stability. The preparation method is simple, feasible and beneficial to large-scale popularization.

Description

technical field [0001] The invention relates to photocatalytic technology in the field of environmental treatment, in particular to a method for rapidly synthesizing a molecular sieve-loaded nanocomposite photocatalyst. Background technique [0002] Among many photocatalytic materials, titanium dioxide is non-toxic, has good chemical stability, high photocatalytic activity, and is cheap and easy to obtain, so it has become the most widely used semiconductor photocatalytic material. At present, in the photocatalytic reaction, there are disadvantages that the catalyst is easy to deactivate, easy to condense, and difficult to recycle. One of the effective methods to overcome these shortcomings is to support nanomaterials and combine them with a single TiO 2 system compared to supported TiO 2 The liquid-solid separation of the system is relatively easy, can be recycled and reused, and has higher application value. And a large number of studies have shown that in the photocatal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J37/34B01J37/16C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J29/0308B01J29/0325B01J37/16B01J37/346C02F2305/10C02F2101/36C02F2101/38C02F2101/40B01J2229/186B01J35/39
Inventor 陈昱贺克斌张伦梁王红黄磊汤瑶黄笑帝
Owner AOWEI TIANJIN ENVIRONMENTAL PROTECTION TECH
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