Molybdenum-doped zinc indium sulfide (ZnIn2S4) hollow hierarchical structure photocatalyst applied to photocatalytic water splitting for hydrogen production, and preparation method thereof

A photocatalyst and hierarchical structure technology, which can be used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problems that restrict the practical application of photo-splitting water for hydrogen production, low quantum efficiency and low energy conversion rate. , to achieve high-efficiency photocatalytic hydrogen production performance, conducive to large-scale industrial production, and the effect of mild conditions

Active Publication Date: 2020-01-17
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a variety of semiconductor catalysts (metal oxides, metal sulfides, organic polymers, etc.) have been developed and further applied in the field of hydrogen production by photolysis of water, the low quantum efficiency and energy conversion rate still restrict the practical application of hydrogen production by photolysis of water. pace

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  • Molybdenum-doped zinc indium sulfide (ZnIn2S4) hollow hierarchical structure photocatalyst applied to photocatalytic water splitting for hydrogen production, and preparation method thereof
  • Molybdenum-doped zinc indium sulfide (ZnIn2S4) hollow hierarchical structure photocatalyst applied to photocatalytic water splitting for hydrogen production, and preparation method thereof
  • Molybdenum-doped zinc indium sulfide (ZnIn2S4) hollow hierarchical structure photocatalyst applied to photocatalytic water splitting for hydrogen production, and preparation method thereof

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preparation example Construction

[0028] The preparation steps of the present invention are as follows:

[0029] Dissolve appropriate amount of molybdenum powder in H under ice bath 2 o 2Molybdenum-containing precursor solution was obtained in the solution, and the solution was added dropwise to 20 mL of ethanol solvent, then zinc chloride, indium chloride, and thioacetamide were dissolved in the above ethanol solution in a molar ratio of 1:2:4, and stirred After uniformity, it was transferred to a high-pressure reactor, kept at 120°C for 2 hours, and cooled to room temperature naturally. The obtained product was sequentially washed with deionized water and absolute ethanol, and vacuum-dried to obtain molybdenum-doped ZnIn 2 S 4 Hierarchical structure photocatalyst named M-ZIS.

Embodiment 1

[0031] Dissolve 0.212 mg molybdenum powder in 200 μL H under ice bath 2 o 2 Molybdenum-containing precursor solution was obtained in the solution, and the solution was added dropwise to 20 mL of ethanol solvent, then zinc chloride, indium chloride, and thioacetamide were dissolved in the above ethanol solution in a molar ratio of 1:2:4, and stirred After uniformity, it was transferred to a high-pressure reactor, kept at 120°C for 2 hours, and cooled to room temperature naturally. The obtained product was successively washed with deionized water and absolute ethanol, and vacuum-dried to obtain ZnIn with a molybdenum doping mass of 0.05%. 2 S 4 Hierarchical structured photocatalyst named M 0.05 -ZIS. Then 20 mg of the synthesized powder catalyst was accurately weighed and placed in a photo-splitting water reactor to test the hydrogen production performance of photo-splitting water.

Embodiment 2

[0033] Dissolve 0.423mg molybdenum powder in 200 μL H under ice bath 2 o 2 Molybdenum-containing precursor solution was obtained in the solution, and the solution was added dropwise to 20 mL of ethanol solvent, then zinc chloride, indium chloride, and thioacetamide were dissolved in the above ethanol solution in a molar ratio of 1:2:4, and stirred After uniformity, it was transferred to a high-pressure reactor, kept at 120°C for 2 hours, and naturally cooled to room temperature. The obtained product was washed with deionized water and absolute ethanol in turn, and vacuum-dried to obtain ZnIn with a molybdenum doping mass of 0.1%. 2 S 4 Hierarchical structured photocatalyst named M 0。1 -ZIS. Then 20 mg of the synthesized powder catalyst was accurately weighed and placed in a photo-splitting water reactor to test the hydrogen production performance of photo-splitting water.

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Abstract

The invention discloses a molybdenum-doped ZnIn2S4 hollow hierarchical-structure photocatalyst applied to photocatalytic water splitting for hydrogen production, belonging to the field of photocatalyst preparation and application. According to the invention, molybdenum powder serves as a molybdenum source, and the molybdenum-doped ZnIn2S4 hollow hierarchical-structure photocatalyst is prepared through a one-step solvothermal method. The method does not use a template agent or a surfactant, is simplified in preparation steps, and avoids excessive consumption of raw material and energy; preparation process is simple, and the raw materials are widely available; and the efficient photocatalyst is designed, regulated and controlled from the two aspects of structure and composition, so the economic benefit of photocatalysis is expected to be remarkably improved, and the industrialization process of photocatalysis is promoted.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, in particular to a molybdenum-doped ZnIn with high-efficiency photocatalytic water splitting 2 S 4 A hollow hierarchical structure photocatalyst and a preparation method thereof. Background technique [0002] Energy is an important basis for the sustainable development of the world economy and a material guarantee for human life, production and consumption. With the rapid development of social productivity, the total energy demand is constantly increasing. In the next few billion years, solar energy will be an inexhaustible ideal energy source. Simulating the process of photosynthesis in nature and converting low-density solar energy into high-density chemical energy has become an ideal way to utilize solar energy. Moreover, hydrogen energy, as a clean energy source, has many advantages: (1) High energy density (~140 mJ / kg), about 4.5 times that of coke and 3 times that of gasoline; (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/08B01J35/10C01B3/04B82Y30/00B82Y40/00
CPCB01J27/051B01J35/004B01J35/10B01J37/082B82Y30/00B82Y40/00C01B3/042C01B2203/0277C01B2203/1076Y02E60/36
Inventor 黄彩进邢芳舒刘秋文
Owner FUZHOU UNIV
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