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A molybdenum disulfide quantum dot/ultrafine titanium dioxide heterojunction nanoribbon photocatalyst and a preparing method and applications thereof

A technology of ultra-fine titanium dioxide and molybdenum disulfide, applied in the field of photocatalytic materials, can solve the problems of low photocatalyst efficiency, difficulty in wide application, high preparation cost, etc., achieve great application value, convenient and flexible application, and improve utilization efficiency

Inactive Publication Date: 2017-08-29
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of environmental protection, clean and renewable hydrogen energy in the prior art, such as high preparation cost, difficulty in wide application, low photocatalyst efficiency and potential secondary pollution, the problem to be solved by the present invention is to provide a molybdenum disulfide quantum dot / Ultrafine titania heterojunction nanoribbon and its preparation method and application

Method used

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  • A molybdenum disulfide quantum dot/ultrafine titanium dioxide heterojunction nanoribbon photocatalyst and a preparing method and applications thereof
  • A molybdenum disulfide quantum dot/ultrafine titanium dioxide heterojunction nanoribbon photocatalyst and a preparing method and applications thereof
  • A molybdenum disulfide quantum dot/ultrafine titanium dioxide heterojunction nanoribbon photocatalyst and a preparing method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0024] ①Prepare the mixed organic solvent according to the volume ratio N,N-dimethylformamide: glacial acetic acid (DMF:HAc)=6:4, then mix the organic solvent, LiAc·2H 2 O, tetrabutyl titanate mixed organic solvent according to 100L, 2000g LiAc·2H 2 The proportion of 0.20L tetrabutyl titanate is added in the hydrothermal reaction kettle successively, and the filling degree is controlled at 60% of the reaction kettle volume, and stirred evenly; then the hydrothermal reaction kettle is sealed, and it is put into a drying box to make The hydrothermal temperature is controlled at 200°C, and the reaction time is controlled at 20h. After the reaction is completed, it is naturally cooled to room temperature. The product obtained is repeatedly washed with absolute ethanol until it is neutral, then suction filtered, and dried. The obtained white powder is ultrafine TiO 2 nanobelt;

[0025] ②Take the TiO obtained in step ① 2 Powder and dispersed in water, ultrasonically stirred for 30...

Embodiment 2

[0033] ① Make a mixed organic solvent with a volume ratio of DMF:HAc (N,N-dimethylformamide: glacial acetic acid) = 6:4, LiAc·2H 2 O, tetrabutyl titanate according to 120L mixed organic solvent, 2100g LiAc 2H 2 The ratio of 0.25L tetrabutyl titanate is added in the hydrothermal reaction kettle successively, and the filling degree is controlled at 50% of the reaction kettle volume, and stirred evenly; then the hydrothermal reaction kettle is sealed, and it is put into a drying box, so that The hydrothermal temperature is controlled at 200±10°C, and the reaction time is controlled at 16 hours. After the reaction is completed, it is naturally cooled to room temperature, and the obtained product is repeatedly washed with absolute ethanol to neutrality, then filtered with suction, and dried to obtain ultrafine TiO 2 Nanobelt white powder;

[0034] ②Take the TiO obtained in step ① 2 Powder and dispersed in water, ultrasonically stirred for 30±5min to obtain TiO with a concentratio...

Embodiment 3

[0038] ① Make a mixed organic solvent with a volume ratio of DMF:HAc (N,N-dimethylformamide: glacial acetic acid) = 6:4, LiAc·2H 2 O, tetrabutyl titanate mixed organic solvent according to 100L, 2000g LiAc·2H 2 The ratio of 0.20L tetrabutyl titanate is added in the hydrothermal reaction kettle successively, and the filling degree is controlled at 70% of the reaction kettle volume, and stirred evenly; then the hydrothermal reaction kettle is sealed, and it is put into a drying box to make The hydrothermal temperature is controlled at 200±10°C, and the reaction time is controlled at 18 hours. After the reaction is completed, it is naturally cooled to room temperature, and the obtained product is repeatedly washed with absolute ethanol until it is neutral, then suction filtered, and dried to obtain ultrafine TiO 2 Nanobelt white powder;

[0039] ②Take the TiO obtained in step ① 2 Powder and dispersed in water, ultrasonically stirred for 30±5min to obtain TiO with a concentratio...

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Abstract

A molybdenum disulfide quantum dot / ultrafine titanium dioxide heterojunction nanoribbon photocatalyst is disclosed. The photocatalyst comprises TiO2 nanoribbon and MoS2 quantum dots with which the TiO2 nanoribbon is evenly loaded. The mass ratio of the MoS2 to the TiO2 is 0.1-10%. The invention also discloses a preparing method and applications of the photocatalyst. Experiments prove that the photocatalyst has excellent performance of photocatalytic water cracking for hydrogen generation. The hydrogen generating rate per unit area (1 m<2>) is about 2.2 mmol / h under visible light exposure intensity of 30-120 mW / cm<2> in exposure time of 0.1-8 h. In sunlight, ultraviolet light in the sunlight can enhance the hydrogen generation performance through photocatalytic water cracking and the quantum dots can enhance light absorption characteristics, and therefore the application range is wider, and the photocatalyst and the method are easy to popularize and have high application value.

Description

technical field [0001] The invention relates to a molybdenum disulfide quantum dot / ultrafine titanium dioxide heterojunction nanobelt photocatalyst, a preparation method and an application thereof, and belongs to the technical field of photocatalytic materials. Background technique [0002] Titanium dioxide is a highly efficient photocatalyst for hydrogen production from water, and has been widely studied as one of the most important photocatalysts since 1981. Heterostructure photocatalyst is one of the effective ways to enhance photocatalysis. Heterojunction photocatalysts often have better catalytic performance than either single phase constituting the heterostructure. In order to improve the performance of photocatalytic hydrogen production, a lot of research work has been carried out. Among them, improving the separation ability of photogenerated carriers is one of the most important means to improve the photocatalytic performance. In order to improve the TiO 2 For t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C01B3/04
CPCC01B3/042B01J27/051B01J35/39Y02E60/36
Inventor 李海东唐建国刘继宪黄林军王彦欣
Owner QINGDAO UNIV
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