Efficient nanocrystal colloidal hydrogen production catalyst and preparation method thereof

A technology of nanocrystals and catalysts, which is applied in the field of high-efficiency nanocrystal colloidal hydrogen production catalysts and its preparation, can solve problems such as easy agglomeration of transition metal materials and low catalytic activity, affecting the cycle life of noble metal catalysts, and low catalytic hydrogen production activity. To achieve the effect of multiple utilization, high-efficiency catalytic hydrogen production, and improved service life

Inactive Publication Date: 2019-05-03
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

However, it is limited to the fact that transition metal materials are easy to agglomerate and the catalytic activity is much lower than that of noble metal catalysts, which seriously affects the cycle life of noble metal catalysts, and often only achieves 1 or 2 times of low catalytic hydrogen production activity.

Method used

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  • Efficient nanocrystal colloidal hydrogen production catalyst and preparation method thereof
  • Efficient nanocrystal colloidal hydrogen production catalyst and preparation method thereof
  • Efficient nanocrystal colloidal hydrogen production catalyst and preparation method thereof

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preparation example Construction

[0025] A preparation method for high-efficiency nanocrystalline colloidal hydrogen production catalysis, the technical scheme is: under certain temperature conditions, according to a certain proportion of cobalt dichloride solution, g-C 3 N 4 Powder ultrasonic dispersion solution and PVP colloidal solution are mixed, and then prepared by hydrothermal synthesis to obtain g-C 3 N 4 / Co 3 o 4 A nanocrystalline colloidal material with photoresponse enhanced catalytic hydrogen production performance; specifically comprising the following steps:

[0026] Step (1): Using melamine as raw material, prepare g-C by calcining method 3 N 4 Lumps, and then by grinding to get g-C 3 N 4 powder.

[0027] Step (2): Dissolve 0.00157 g-0.00314 g of cobalt dichloride in 20 mL of deionized water and stir well.

[0028] Step (3): Take 60 mg g-C 3 N 4 The powder was dissolved in 20 mL of deionized water, stirred evenly, mixed evenly with the solution obtained in step (2) and sonicated for ...

Embodiment

[0035] Comparative experiments of colloidal catalysts with different metal ion doping amounts:

[0036] First, prepare colloidal catalysts with different metal ion doping amounts:

[0037] This embodiment prepares g-C 3 N 4 / Co 3 o 4 The photoresponsive colloidal catalyst specifically comprises the following steps:

[0038] Step (1): Using melamine as raw material, prepare g-C by calcining method 3 N 4 Lumps, and then by grinding to get g-C 3 N 4 powder.

[0039] Step (2): Dissolve 0.00157, 0.00314 and 0.00628 g of cobalt dichloride in three 20 mL deionized water respectively and stir evenly.

[0040] Step (3): Take 3 portions of 60 mg g-C respectively 3 N 4 The powders were dissolved in 20 mL of deionized water, stirred evenly, mixed with the solution obtained in step (2) and ultrasonicated for 1 h.

[0041] Step (4): 3.96 g of protective agent polyvinylpyrrolidone (PVP) was dissolved in 20 mL of deionized water, and mixed with the mixed solution obtained in step ...

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Abstract

The invention discloses an efficient nanocrystal colloidal hydrogen production catalyst and a preparation method thereof. The technical scheme is that a cobalt dichloride solution, a g-C3N4 powder ultrasonic dispersion solution and a PVP colloidal solution are mixed according to a certain ratio under the condition of a certain temperature, and then, a nanocrystal colloidal material with g-C3N4 / Co3O4 photoresponse reinforced catalytic hydrogen production performance is prepared by using a hydrothermal synthesis method. The preparation method provided by the invention is simple in operation, lowin cost, safe and environment-friendly; and the prepared g-C3N4 / Co3O4 nanocrystal colloidal material has relatively small nanocrystal size, good dispersibility and efficient photoresponse reinforcedcatalytic hydrogen production performance.

Description

technical field [0001] The invention belongs to the field of hydrogen production energy, and in particular relates to a high-efficiency nanocrystalline colloidal hydrogen production catalyst and a preparation method thereof. Background technique [0002] As a clean energy, hydrogen energy has greatly promoted the development of the field of renewable energy. However, in the application of hydrogen energy, most hydrogen production processes are limited to factors such as poor controllable release performance of hydrogen. Practice has shown that the most effective and safest method is to catalyze hydrogen production through catalysts. Solid hydrides can generally be produced by Thermal decomposition and solvolysis and other methods, but thermal decomposition requires a long induction time (about 3h) and high temperature, thus limiting its application, the solvolysis method can be used at any temperature through a suitable catalyst to achieve high efficiency of hydrogen freed....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C01B3/06
Inventor 王宇晶张新东陈建士丽敏范丽君刘改燕
Owner XIAN TECHNOLOGICAL UNIV
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