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A kind of monolayer molybdenum disulfide/ultrafine titania nanobelt heterostructure photocatalyst and its preparation method

A technology of ultra-fine titanium dioxide and single-layer molybdenum disulfide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult recovery and separation, less exposure of high catalytic active surfaces, and utilization of sunlight Low efficiency and other problems, to achieve the effect of good hydrogen production performance, good catalytic performance, good degradation effect

Active Publication Date: 2017-10-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even mature photocatalytic materials still have the following disadvantages: less exposure of high catalytic active surfaces, difficult recovery and separation, excitation only under ultraviolet light conditions, low utilization rate of sunlight, etc.
However, so far, for the heterostructure formed by the composite of single-layer molybdenum disulfide / ultrafine titania nanobelts, and using the single-layer molybdenum disulfide and ultrafine titania nanobelt heterostructure as a photocatalyst in catalytic degradation of pollutants and hydrogen production The application in has not been reported yet

Method used

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  • A kind of monolayer molybdenum disulfide/ultrafine titania nanobelt heterostructure photocatalyst and its preparation method
  • A kind of monolayer molybdenum disulfide/ultrafine titania nanobelt heterostructure photocatalyst and its preparation method
  • A kind of monolayer molybdenum disulfide/ultrafine titania nanobelt heterostructure photocatalyst and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0025] ① In terms of volume ratio, prepare a mixed organic solvent according to the ratio of N,N-dimethylformamide: glacial acetic acid (DMF: HAc) = 6:4, the mixed organic solvent, LiAc·2H 2 O, tetrabutyl titanate mixed organic solvent by 10L, 200g LiAc 2H 2 O, the proportion of 2L tetrabutyl titanate is added to the hydrothermal reaction kettle in turn, the filling degree is controlled at 50% to 80% of the reaction kettle volume, and the stirring is even; then the hydrothermal reaction kettle is sealed and put into a dry In the box, control the hydrothermal temperature at 200±10°C, react for 20 hours, and naturally cool to room temperature after the reaction. The product obtained is washed repeatedly with absolute ethanol until it is neutral, then suction filtered and dried. The obtained white powder is ultrafine Titanium dioxide nanoribbons;

[0026]②Take the ultrafine titanium dioxide nanoribbon powder prepared in step ① and disperse it in water, stir it ultrasonically for...

Embodiment 2

[0033] ① In terms of volume ratio, prepare a mixed organic solvent according to the ratio of N,N-dimethylformamide: glacial acetic acid (DMF: HAc) = 6:4, the mixed organic solvent, LiAc·2H 2 O, tetrabutyl titanate mixed organic solvent by 10L, 200g LiAc 2H 2 O, the proportion of 2L tetrabutyl titanate is added to the hydrothermal reaction kettle in turn, the filling degree is controlled at 60% to 80% of the reaction kettle volume, and the stirring is even; then the hydrothermal reaction kettle is sealed and put into a dry In the box, control the hydrothermal temperature at 200±10°C, react for 16 hours, and naturally cool to room temperature after the reaction. The product obtained is washed repeatedly with absolute ethanol until it is neutral, then suction filtered and dried. The obtained white powder is ultrafine Titanium dioxide nanoribbons;

[0034] ② Disperse the ultrafine titanium dioxide nanoribbon powder prepared in step ① in water, and stir it ultrasonically for 30±5m...

Embodiment 3

[0038] ① In terms of volume ratio, prepare a mixed organic solvent according to the ratio of N,N-dimethylformamide: glacial acetic acid (DMF: HAc) = 6:4, the mixed organic solvent, LiAc·2H 2 O, tetrabutyl titanate mixed organic solvent by 10L, 200g LiAc 2H 2 O, the proportion of 2L tetrabutyl titanate is added to the hydrothermal reaction kettle in sequence, the filling degree is controlled at 60% to 70% of the reaction kettle volume, and the stirring is even; then the hydrothermal reaction kettle is sealed and put into a dry In the box, control the hydrothermal temperature at 200±10°C, react for 24 hours, and naturally cool to room temperature after the reaction. The product obtained is washed repeatedly with absolute ethanol until it is neutral, then suction filtered and dried. The obtained white powder is ultrafine Titanium dioxide nanoribbons;

[0039] ②Take the ultrafine titanium dioxide nanoribbon powder prepared in step ① and disperse it in water, stir it ultrasonicall...

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Abstract

The invention discloses a single-layer molybdenum disulfide / ultrafine titanium dioxide nanoribbon heterostructure photocatalyst, which is composed of ultrafine titanium dioxide nanoribbons with a length of 100nm to 300nm, a width of 5nm to 15nm, and a thickness of 1nm to 5nm. The surface is wrapped with a layer of two-dimensional nanomaterial MoS2 with a thickness of 0.8nm to 3nm, wherein the photocatalyst has a mass ratio of MoS2:TiO2=0.1 to 10:100. The photocatalyst of the present invention combines the properties of MoS2 and TiO2. On the one hand, under the action of light, MoS2 is beneficial to carrier molecules, and the generated carriers promote the photocatalytic reaction activity of ultra-fine TiO2 nanoribbons, which reduces organic pollution. It has good catalytic performance in the degradation of model substances and photocatalytic hydrogen production; on the other hand, the heterojunction can effectively suppress the generated carrier recombination. The photocatalyst synthesis process and equipment of the invention are simple, low cost, high efficiency, short reaction cycle, good repeatability and broad industrial application prospects.

Description

technical field [0001] The present invention relates to a kind of photocatalyst of heterogeneous structure and preparation method thereof, relate in particular to a kind of monolayer molybdenum disulfide / ultrafine titania nanoribbon (MoS 2 / TiO 2 ) heterostructure photocatalyst and its preparation method and application, belonging to the technical field of nanomaterial photocatalysis. Background technique [0002] A photocatalyst is a substance that does not participate in the reaction itself and accelerates the photochemical reaction. Photocatalysis is the organic combination of photochemistry and catalyst. Under the background of environmental pollution and energy crisis, photocatalytic preparation of clean energy-hydrogen and degradation of organic pollutants is an efficient and green new technology developed in recent years. However, as a new functional material, its research and development also faces many limitations, such as single catalytic performance, catalyst e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/02A62D3/17A62D3/176C01B3/04A62D101/28A62D101/26B01J35/00
CPCA62D3/17A62D3/176C01B3/042B01J27/051C01B2203/1041C01B2203/0277A62D2101/26A62D2101/28B01J35/40B01J35/39Y02E60/36
Inventor 刘宏李海东王亚娜刘志贺谭华陈国辉桑元华
Owner SHANDONG UNIV
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