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Molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst for generating hydrogen from visible light and preparation method of molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst

A technology of molybdenum disulfide and quantum dots, which is applied in the field of photocatalytic materials, can solve the problems of Pt scarce precious metals, restrict large-scale application, limit effective utilization, etc., achieve good stability, excellent light absorption efficiency, and reduce production costs.

Inactive Publication Date: 2018-05-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, sulfide has serious photocorrosion phenomenon, which limits its effective use.
In order to overcome this defect, the common measure is to load the noble metal Pt on its surface, but Pt is a scarce noble metal, which seriously restricts its large-scale application.

Method used

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  • Molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst for generating hydrogen from visible light and preparation method of molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst
  • Molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst for generating hydrogen from visible light and preparation method of molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst
  • Molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst for generating hydrogen from visible light and preparation method of molybdenum disulfide quantum dot/copper-indium-sulfur composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A visible light hydrogen production molybdenum disulfide quantum dot / copper indium sulfur composite photocatalyst, the preparation method comprising the following steps:

[0035] 1) Preparation of MoS 2 Quantum dots: 1mmol of Na 2 MoO 4 2H 2 O and 4 mmol of dibenzyl disulfide were dissolved in 60 ml of deionized water, and the solution was stirred until clarified, then transferred to a 100 ml reaction kettle, and subjected to hydrothermal reaction at 220°C for 24 hours; after the reaction was completed, the supernatant was poured off, and the obtained lower Transfer the precipitate to 100ml ethanol water solution (the volume ratio of ethanol and water is 3:2), ultrasonicate for 10h; Take the upper brown liquid, dry it at 80°C to obtain molybdenum disulfide quantum dots;

[0036] 2) Preparation of MoS 2 Quantum dots / CuInS 2 Composite material: 1mmol CuCl 2 , 1mmol InCl 3 4H 2 O and 2mmol thiourea are added in the ethylene glycol of 60ml, stir until clarification...

Embodiment 2～5

[0041] The preparation method of visible light hydrogen-producing molybdenum disulfide quantum dots / copper indium sulfur composite photocatalyst described in Examples 2 to 5 is roughly the same as that of Example 1, except that the addition amount of molybdenum disulfide quantum dots in step 2) accounts for The obtained flower globular CuInS2 1%, 2%, 4%, 5%, 10% of the mass of the matrix.

[0042] Carry out X-ray diffraction analysis to embodiment 2~5 gained product respectively, the result sees respectively figure 1 , the test result is consistent with the test result of Example 1.

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Abstract

The invention discloses a molybdenum disulfide quantum dot / copper-indium-sulfur composite photocatalyst for generating hydrogen from visible light. The composite photocatalyst is prepared by loading MoS2 quantum dots serving as a co-catalyst on a curd like CuInS2. According to the photocatalyst disclosed by the invention, by loading the MoS2 quantum dots on a curd like CuInS2 base material, the problems in photoelectron-hole combination and photocorrosion in a CuInS2 composite material can be inhibited to a certain degree, the photoabsorption efficiency and the photocatalytic hydrogen generation efficiency of the obtained composite material are effectively improved, the application range of the composite material is widened, and the problem that existing sulfide-based photocatalytic raw material often employs an expensive precious metal as a co-catalyst so as to improve the catalyst performance; the preparation method has the advantages of simplicity, wide source of raw materials and low cost and adaptability to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a visible light hydrogen-producing molybdenum disulfide quantum dot / copper indium sulfur composite photocatalyst and a preparation method thereof. Background technique [0002] In recent years, the consumption of non-renewable resources such as coal, oil and natural gas has caused serious environmental and energy shortage problems. Therefore, the development of efficient and environmentally friendly renewable energy has become an urgent problem to be solved. Hydrogen is a clean energy with high combustion value and high efficiency, and only produces water after combustion, which will not cause secondary pollution. Therefore, hydrogen is an ideal energy source. [0003] Sunlight, as the energy with the most extensive coverage on the earth, has limited its use due to its low energy density. The photocatalytic hydrogen production technology developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C01B3/04
CPCC01B3/042B01J27/051C01B2203/1094C01B2203/1088C01B2203/1076B01J35/39Y02E60/36
Inventor 李昱刘洋韦方艳戴欣董文达陈浩宋建平邹伟王洪恩陈丽华阳晓宇苏宝连
Owner WUHAN UNIV OF TECH