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A kind of preparation method of cds/coo nano-heterostructure

A nano-heterostructure and nano-rod technology, applied in the direction of catalyst activation/preparation, nanotechnology, nanotechnology, etc., can solve the problems of high cost and low conversion rate of catalyst to solar energy, so as to reduce reaction cost and increase conversion utilization rate , good reusability effect

Active Publication Date: 2020-06-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the technical problems of low solar energy conversion rate and high cost of existing catalysts, and provides a preparation method of CdS / CoO nano-heterostructure

Method used

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  • A kind of preparation method of cds/coo nano-heterostructure
  • A kind of preparation method of cds/coo nano-heterostructure
  • A kind of preparation method of cds/coo nano-heterostructure

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specific Embodiment approach 1

[0048] Specific embodiment 1: In this embodiment, a method for preparing a CdS / CoO nano-heterostructure is carried out according to the following steps:

[0049] 1. The Cd(NO 3 ) 2 4H 2 O and NH 2 CSNH 2 Put it into the ethylenediamine solution and perform ultrasonic treatment. After the solution becomes clear, put it into a polytetrafluoroethylene reactor for hydrothermal reaction; then cool it to room temperature, then wash it with deionized water and absolute ethanol, and dry it. Obtain CdS nanorods;

[0050] 2. Put the CdS nanorods obtained in step 1 into the methanol solution containing dimethylimidazole, and after the ultrasonic dispersion is uniform, add the 3 ) 2 methanol solution, stirred, and then centrifuged with methanol to obtain CdS / Co(OH) 2 nanocomposites;

[0051] 3. The CdS / Co(OH) obtained in step 2 2 The nano-composite material is calcined under an argon atmosphere to obtain the CdS / CoO nano-heterostructure.

specific Embodiment approach 2

[0052] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, Cd(NO 3 ) 2 4H 2 O, NH 2 CSNH 2 The mass volume ratio of the solution to ethylenediamine is (1-2) g: (1-2) g: (30-50) mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0053] Specific embodiment 3: This embodiment differs from specific embodiment 1 or 2 in that: the hydrothermal temperature in step 1 is 160-180° C., and the hydrothermal time is 24-48 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of a CdS / CoO nano-heterostructure and relates to the field of preparation methods of semiconductor composite materials, aiming at solving the technical problems of an existing catalyst of low solar energy conversion rate and high cost. The method comprises the following steps: firstly, immersing a CdS nano-rod into a methanol solution containing dimethylimidazole; hydrolyzing the dimethylimidazole by utilizing a trace amount of water in methanol, so as to form a partial alkaline environment on the surface of the CdS nano-rod; then adding a methanol solution of Co(NO3)2 into the solution to obtain a CdS / Co(OH)2 nano-composite material; finally, calcining in an inert atmosphere to obtain a CdS / CoO nano-heterostructure catalyst. The material provided by the invention sufficiently utilizes visible light under the condition that no noble metal material is used as a co-catalyst, and the conversion utilization rate of solar energy is increased; thematerial has very good photoresponse to a visible light region. The material can be used in water photolysis hydrogen production reaction.

Description

technical field [0001] The invention relates to the field of preparation methods of semiconductor compound materials. Background technique [0002] With the rapid development of today's society, non-renewable energy sources such as coal, natural gas and oil, which were formed a long time ago and bred for hundreds of years, play an important role in human life, are constantly decreasing and even on the verge of exhaustion . At the same time, during the combustion and use of these fossil fuels, many air pollutants will be released, such as common nitrogen oxides, sulfur oxides, and carbon oxides, which will change the global climate and seriously endanger human survival. Therefore, finding renewable and clean energy has become an urgent task and mission for scientific researchers today. A large amount of hydrogen is produced by photocatalytic water splitting. In this catalytic process, only the conversion between protons, energy and water is involved, and no by-products and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J37/10B01J37/34B01J37/08C01B3/04B82Y30/00B82Y40/00
CPCB01J27/043B01J35/004B01J37/082B01J37/10B01J37/343B82Y30/00B82Y40/00C01B3/042C01B2203/0277C01B2203/1058Y02E60/36Y02P20/133
Inventor 徐平楚家玉韩喜江杜耘辰张彬
Owner HARBIN INST OF TECH
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