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A kind of molybdenum disulfide quantum dot/copper indium sulfur composite photocatalyst and its preparation method for visible light hydrogen production

A molybdenum disulfide and quantum dot technology, applied in the field of photocatalytic materials, can solve problems such as restricting large-scale application, scarce precious metals of Pt, and restricting effective utilization, and achieve the effects of excellent light absorption efficiency, good stability, and reduced preparation cost.

Inactive Publication Date: 2020-01-14
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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  • A kind of molybdenum disulfide quantum dot/copper indium sulfur composite photocatalyst and its preparation method for visible light hydrogen production
  • A kind of molybdenum disulfide quantum dot/copper indium sulfur composite photocatalyst and its preparation method for visible light hydrogen production
  • A kind of molybdenum disulfide quantum dot/copper indium sulfur composite photocatalyst and its preparation method for visible light hydrogen production

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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 visible light hydrogen-generating molybdenum disulfide quantum dot / copper indium sulfur composite photocatalyst, which uses MoS 2 Quantum dots are cocatalysts, which are MoS 2 Quantum dots loaded on spherical CuInS 2 Composite photocatalyst formed on. The photocatalyst of the present invention is composed of MoS 2 Quantum dots loaded on spherical CuInS 2 On the substrate, CuInS can be inhibited to a certain extent 2 The recombination of photogenerated electrons and holes and photocorrosion problems in composite materials can effectively improve the light absorption efficiency and photocatalytic hydrogen production efficiency of the obtained composite materials, broaden its application scope, and solve the problem that existing sulfide-based photocatalytic raw materials are usually expensive precious metals. It can be used as a cocatalyst to improve the performance of the catalyst; the preparation method involved is simple, the source of raw materials is wide, and the cost is low, so it is suitable for promotion 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 Patents(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