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Ni2P/Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst and preparation method and application thereof

A composite catalyst, photocatalysis technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc. problem, to achieve the effect of improving hydrogen production rate, low cost and good stability

Active Publication Date: 2020-02-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For existing Mn x Cd 1-x S catalyst has serious photocorrosion phenomenon, the defect of easy recombination of photogenerated carriers and Ni 2 The problem of high toxicity and high energy consumption in the P preparation process, the purpose of the present invention is to provide a Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst and its preparation method and application

Method used

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  • Ni2P/Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst and preparation method and application thereof
  • Ni2P/Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst and preparation method and application thereof
  • Ni2P/Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0044] A kind of Ni 2 P / Mn 0.3 Cd 0.7 The preparation method of S photocatalytic water splitting composite catalyst, comprises the steps:

[0045] (1) Mix 5 g of commercial red phosphorus with 15 mL of organic solvent (ethylene glycol), put it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere). The grinding time is 24 h, washing, drying in an argon atmosphere at 100°C for 10 h to obtain pretreated red phosphorus, the particle size of the pretreated red phosphorus is 1-3 μm;

[0046] (2) Add 500 mg of Mn 0.3 Cd 0.7 The S catalyst was added into an aqueous solution of ethanol (volume percent concentration: 33.3 vol%), stirred, the speed of the stirring treatment was 200 rpm, the time of the stirring treatment was 30 min, and then the ultrasonic treatment was performed, the frequency of the ultrasonic treatment was 25 KHz, and the ultrasonic treatment was performed. The treatment time is 1 h, so that Mn 0.3 Cd 0.7 The S ...

Embodiment 2

[0050] A kind of Ni 2 P / Mn 0.3 Cd 0.7 The preparation method of S photocatalytic water splitting composite catalyst, comprises the steps:

[0051] (1) Mix 5 g of commercial red phosphorus with 15 mL of organic solvent (ethylene glycol), put it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere). The grinding time is 24 h, washing, drying in an argon atmosphere at 100°C for 10 h to obtain pretreated red phosphorus, the particle size of the pretreated red phosphorus is 1-3 μm;

[0052] (2) Add 500 mg of Mn 0.3 Cd 0.7 The S catalyst was added into an aqueous solution of ethanol (volume percent concentration: 33.3 vol%), stirred, the speed of the stirring treatment was 200 rpm, the time of the stirring treatment was 30 min, and then the ultrasonic treatment was performed, the frequency of the ultrasonic treatment was 25 KHz, and the ultrasonic treatment was performed. The treatment time is 1 h, so that Mn 0.3 Cd 0.7 The S ...

Embodiment 3

[0056] A kind of Ni 2 P / Mn 0.3 Cd 0.7 The preparation method of S photocatalytic water splitting composite catalyst, comprises the steps:

[0057] (1) Mix 5 g of commercial red phosphorus with 15 mL of organic solvent (ethylene glycol), put it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere). The grinding time is 24 h, washing, drying in an argon atmosphere at 100°C for 10 h to obtain pretreated red phosphorus, the particle size of the pretreated red phosphorus is 1-3 μm;

[0058] (2) Add 500 mg of Mn 0.3 Cd 0.7 The S catalyst was added into an aqueous solution of ethanol (33.3vol% by volume), stirred, the rate of stirring was 200 rpm, the time of stirring was 30 min, and then ultrasonic treatment was performed, the frequency of ultrasonic treatment was 25 KHz, and the ultrasonic The treatment time is 1 h, so that Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a suspension;

[0059] (3) Mix 93 mg of NiC...

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Abstract

The invention discloses a Ni2P / Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst and a preparation method and application thereof. The preparation method comprises the steps: mixing red phosphorus with a solvent evenly, performing grinding so as to obtain pre-treated red phosphorus, adding a Mn0.3Cd0.7S catalyst to an ethanol solution so as to disperse the Mn0.3Cd0.7S catalyst uniformly and obtain a suspension, adding a NiCl2.6H2O and the pre-treated red phosphorus to the suspension, performing a solvothermal reaction, and performing filtration and drying so as to obtain the Ni2P / Mn0.3Cd0.7S photocatalytic water-decomposition composite catalyst. The composite photocatalyst has a rod-like structure and a large aspect ratio, transfer and separation of photo-generated carriersare facilitated, the problem of serious photocorrosion of sulfide catalysts can be solved significantly, and a high photocatalytic hydrogen-production rate is achieved; and in addition, the preparation method of the catalyst has simple operation and an environment-friendly and non-toxic preparation process.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst and its preparation method and application. Background technique [0002] Energy crisis and environmental pollution are two major problems that need to be solved urgently in today's society, and the development of new energy is one of the important ways to solve energy crisis and environmental pollution. Solar photocatalytic water splitting to produce hydrogen is favored by governments and technicians of various countries because of its mild reaction conditions, simple operation, clean and pollution-free. The key to semiconductor photocatalytic water splitting to produce hydrogen is to find a stable and efficient photocatalyst with a suitable band gap. At present, the photocatalysts that have been studied more are oxides, sulfides, carbon nitride, etc. However, oxides such as TiO 2 Due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01J35/02C01B3/04B01J35/00
CPCB01J27/187C01B3/042C01B2203/0277B01J35/00B01J35/30B01J35/39Y02E60/36
Inventor 董新法韩燕玲耿建铭梁志彬
Owner SOUTH CHINA UNIV OF TECH
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