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A kind of nano sheet MFI molecular sieve loaded CDS-PT composite photocatalyst and preparation method thereof

A composite catalyst and nanosheet technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low photocatalytic efficiency, easy recombination of photogenerated carriers, and low utilization rate of solar energy, etc. Achieve large specific surface area, improve separation rate, improve photocatalytic activity and stability

Active Publication Date: 2020-08-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current photocatalysts have the problems of low solar energy utilization rate, easy recombination of photogenerated carriers, and low photocatalytic efficiency.

Method used

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  • A kind of nano sheet MFI molecular sieve loaded CDS-PT composite photocatalyst and preparation method thereof
  • A kind of nano sheet MFI molecular sieve loaded CDS-PT composite photocatalyst and preparation method thereof
  • A kind of nano sheet MFI molecular sieve loaded CDS-PT composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of nanosheet MFI molecular sieve: sodium hydroxide and template C 22 h 45 -N + Br - (CH 3 ) 2 -C 6 h 12 -N + Br - (CH 3 ) 2 -C 6 h 13 Solution I was prepared by dissolving in water, dissolving aluminum sulfate octadecahydrate in sulfuric acid solution to obtain solution II, mixing solution I and solution II while stirring, then adding tetraethyl orthosilicate, and obtaining a mixed gel after stirring. The molar ratio of raw materials in the gel solution is 30Na 2 O: 1Al 2 o 3 : 100SiO2 2 : 10C 22-6-6 Br 2 : 18H 2 SO 4 : 4000H 2 O. The prepared mixed gel was subjected to a hydrothermal reaction at 150° C. for 6 days to obtain a hydrothermal reaction liquid. The hydrothermal reaction solution was filtered, washed with deionized water, dried in an oven at 110°C for 24 hours, ground and heat-treated at 550°C for 6 hours to obtain a nanosheet MFI molecular sieve with a Si / Al atomic ratio of 50.

[0035] (2) Preparation of CdS quantum do...

Embodiment 2～4

[0039] The preparation method of Examples 2-4 is the same as that of Example 1, except that the time for hydrothermal reaction in step (1) is changed to 1 day, 3 days, and 8 days respectively.

Embodiment 5

[0041] The preparation method of embodiment 5 is identical with embodiment 1, just changes the gel solution raw material mol ratio into 30Na in step (1) 2 O: 1Al 2 o 3 : 100SiO2 2 : 10C 22-6-6 Br 2 : 15H 2 SO 4 : 4000H 2 O.

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Abstract

The invention discloses a nano sheet MFI molecular sieve supported CdS-Pt composite photocatalyst and a preparation method thereof. A nano sheet MFI molecular sieve is prepared by a static hydrothermal crystallization method; then the nano sheet MFI molecular sieve is taken as a body, Pt is loaded on the nano sheet MFI molecular sieve by a photo reduction method, and then CdS quantum dots, which are prepared by a hot injection method, are compounded with the molecular sieve to obtain the nano sheet MFI molecular sieve supported CdS-Pt composite photocatalyst. A micro-mesoporous molecular sievewith a large specific surface area is taken as the carrier of the provided composite photocatalyst, thus active components can be effectively dispersed; due to the nano layered structure, transmission of photo-generated electronic hole pairs is promoted; after the molecular sieve is compounded with CdS-Pt, the absorption of solar energy is enhanced, and moreover, the stability and photocatalyticactivity of the catalyst are excellent.

Description

technical field [0001] The invention relates to a nanosheet MFI molecular sieve loaded CdS-Pt composite photocatalyst and a preparation method thereof. Background technique [0002] The biggest problem facing mankind in the 21st century is to solve energy and environmental problems, and the effective use of solar energy is the most perfect way to solve energy exhaustion, and it can also alleviate the global environmental pollution caused by a large amount of carbon dioxide and nitrogen oxide emissions. How to convert solar energy into hydrogen energy has attracted extensive attention from all over the world in recent years. Photocatalyst has the function of directly converting light energy into chemical energy, so it is of great significance to develop sustainable, environmentally friendly and inexpensive new energy through the innovation of photocatalytic technology. [0003] Layered molecular sieve is a layered crystal material with a pore opening system on the plane perp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/068C01B39/04C01B3/02
CPCY02P20/133
Inventor 程党国刘慧陈丰秋詹晓力
Owner ZHEJIANG UNIV
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