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

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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 monolayer molybdenum disulfide / ultrafine titanium dioxide nanoribbon heterostructure photocatalyst. The photocatalyst is composed of an ultrafine titanium dioxide nanoribbon with the length of 100 nm-300 nm, the width of 5 nm-15 nm and the thickness of 1 nm-5 nm and a two-dimension nano material MoS2 with the thickness of 0.8 nm-3 nm, wherein the surface of the ultrafine titanium dioxide nanoribbon is wrapped by the two-dimension nano material MoS2, and in the photocatalyst, the mass ratio of MoS2 to TiO2 is (0.1-10) to 100. The photocatalyst combines the properties of MoS2 and TiO2, on one hand, under the action of illumination, MoS2 benefits carrier molecules, produced carriers facilitate the photo-catalytic reaction activity of the ultrafine TiO2 nanoribbon, and good catalytic performance is achieved for degradation of an organic pollution model compound and photocatalysis hydrogen production; on the other hand, the heterostructure can effectively inhibit recombination of the produced carriers. According to the monolayer molybdenum disulfide / ultrafine titanium dioxide nanoribbon heterostructure photocatalyst, the synthetic process and equipment are simple, the cost is low, the efficiency is high, the reaction period is short, the repeatability is good, and the industrial application prospect is wide.

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): B01J27/051B01J35/02A62D3/17A62D3/176C01B3/04A62D101/28A62D101/26
CPCA62D3/17A62D3/176A62D2101/26A62D2101/28B01J27/051B01J35/004B01J35/023C01B3/042C01B2203/0277C01B2203/1041Y02E60/36
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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