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a kind of ni 2 p/mn 0.3 cd 0.7 s photocatalytic water splitting composite catalyst and its preparation method and application

A composite catalyst and water splitting technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/syngas production, etc. problem, to achieve the effect of low cost, good stability and simple process

Active Publication Date: 2021-09-21
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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  • a kind of ni <sub>2</sub> p/mn <sub>0.3</sub> cd <sub>0.7</sub> s photocatalytic water splitting composite catalyst and its preparation method and application
  • a kind of ni <sub>2</sub> p/mn <sub>0.3</sub> cd <sub>0.7</sub> s photocatalytic water splitting composite catalyst and its preparation method and application
  • a kind of ni <sub>2</sub> p/mn <sub>0.3</sub> cd <sub>0.7</sub> s photocatalytic water splitting composite catalyst and its preparation method and application

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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 is selected), add it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere) for 24 hours, wash , drying in an argon atmosphere at 100° C. for 10 hours to obtain pretreated red phosphorus, wherein the pretreated red phosphorus has a particle size of 1-3 μm;

[0046] (2) 500mg of Mn 0.3 Cd 0.7 The S catalyst is added in the aqueous solution of ethanol (volume percent concentration is 33.3vol%), stirring treatment, the speed of stirring treatment is 200rpm, the time of stirring treatment is 30min, then carries out ultrasonic treatment, the frequency of ultrasonic treatment is 25KHz, the time of ultrasonic treatment is 1h, so that Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a susp...

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 is selected), add it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere) for 24 hours, wash , drying in an argon atmosphere at 100° C. for 10 hours to obtain pretreated red phosphorus, wherein the pretreated red phosphorus has a particle size of 1-3 μm;

[0052] (2) 500mg of Mn 0.3 Cd 0.7 The S catalyst is added in the aqueous solution of ethanol (volume percent concentration is 33.3vol%), stirring treatment, the speed of stirring treatment is 200rpm, the time of stirring treatment is 30min, then carries out ultrasonic treatment, the frequency of ultrasonic treatment is 25KHz, the time of ultrasonic treatment is 1h, so that Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a susp...

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 is selected), add it into an agate jar, seal it, vacuumize it, and grind it under a protective atmosphere (argon atmosphere) for 24 hours, wash , drying in an argon atmosphere at 100° C. for 10 hours to obtain pretreated red phosphorus, wherein the pretreated red phosphorus has a particle size of 1-3 μm;

[0058] (2) 500mg of Mn 0.3 Cd 0.7 The S catalyst is added in the aqueous solution of ethanol (volume percent concentration is 33.3vol%), stirring treatment, the speed of stirring treatment is 200rpm, the time of stirring treatment is 30min, then carries out ultrasonic treatment, the frequency of ultrasonic treatment is 25KHz, the time of ultrasonic treatment is 1h, so that Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a suspe...

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Abstract

The invention discloses a Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst and its preparation method and application. The method comprises: uniformly mixing red phosphorus with a solvent, and grinding to obtain pretreated red phosphorus; 0.3 Cd 0.7 S catalyst is added to the ethanol solution to make Mn 0.3 Cd 0.7 The S catalyst is evenly dispersed to obtain a suspension; the NiCl 2 ·6H 2 O and pretreated red phosphorus are added to the suspension, subjected to solvothermal reaction, filtered, and dried to obtain the Ni 2 P / Mn 0.3 Cd 0.7 S photocatalytic water splitting composite catalyst. The composite photocatalyst provided by the invention has a rod-like structure, has a large aspect ratio, is beneficial to the transfer and separation of photogenerated carriers, can significantly improve the problem of serious photocorrosion of sulfide catalysts, and has a higher photocatalytic hydrogen production rate. In addition, the catalyst preparation method provided by the invention is simple to operate, and the preparation process is environmentally friendly and non-toxic.

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 etc. D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/187B01J35/02C01B3/04
CPCB01J27/187B01J35/004B01J35/02C01B3/042C01B2203/0277Y02E60/36
Inventor 董新法韩燕玲耿建铭梁志彬
Owner SOUTH CHINA UNIV OF TECH
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