Controllable preparation method and application of Cu7S4-Cu9S8 heterostructure hollow cube catalyst

A heterogeneous structure, cube technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, imino compound preparation, etc., can solve the problem of low photocatalytic activity of single copper sulfide, and achieve simple and easy test method, shape Uniform appearance and low experimental cost

Active Publication Date: 2019-03-15
HEILONGJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention will solve the technical problem of low photocatalytic activity of existing single copper sulfide,

Method used

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  • Controllable preparation method and application of Cu7S4-Cu9S8 heterostructure hollow cube catalyst
  • Controllable preparation method and application of Cu7S4-Cu9S8 heterostructure hollow cube catalyst
  • Controllable preparation method and application of Cu7S4-Cu9S8 heterostructure hollow cube catalyst

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Experimental program
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Example Embodiment

[0036] Specific embodiment one: this embodiment is a kind of Cu 7 S 4 -Cu 9 S 8 The controllable preparation method of the heterostructure hollow cube catalyst is specifically carried out as follows:

[0037] 1. Preparation of cuprous oxide cubes: first dissolve copper sulfate in disodium ethylenediaminetetraacetate solution, then add glucose, stir well, add sodium hydroxide, and stir in a water bath to obtain a precipitate. Wash the material with ethanol, then centrifuge and dry;

[0038] 2. Vulcanization: Disperse the precipitate treated in step one in water, then add sulfur source and ammonia water, mix and stir to obtain a uniform solution;

[0039] 3. The solution obtained in step 2 is subjected to mechanical stirring reaction at room temperature to obtain Cu 2 O@Cu 7 S 4 -Cu 9 S 8 cube;

[0040] 4. Separation, washing and drying: the Cu obtained in step 3 2 O@Cu 7 S 4 -Cu 9 S 8 The cube was washed with ethanol, then centrifuged and dried;

[0041] Five, except for Cu 2 O: Dispers...

Example Embodiment

[0043] Specific embodiment two: this embodiment is different from specific embodiment one in that in step two, 25-35 mg of the precipitate is dispersed into 80 mL of water. Others are the same as the first embodiment.

Example Embodiment

[0044] Specific embodiment three: this embodiment is different from specific embodiment one or two in that in step two the sulfur source is thioacetamide, the volume concentration of ammonia water is 25%, and the amount of ammonia water added is 3.5-4.5 mL. Others are the same as the first or second embodiment.

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Abstract

The invention relates to a controllable preparation method and the application of a Cu7S4-Cu9S8 heterostructure hollow cube catalyst. The invention relates to the field of a catalyst, and particularlyrelates to a controllable preparation method and the application of the Cu7S4-Cu9S8 heterostructure hollow cube catalyst. The invention aims to solve the technical problem of low photocatalytic activity of conventional single copper sulphide. The method comprises the following steps: preparing a cuprous oxide cube by using copper sulfate as a copper source; carrying out stirring at the room temperature in aqueous solution containing ammonium hydroxide by using the cuprous oxide cube as a sacrifice template and using thioacetamide as a sulfur source to prepare Cu2O@Cu7S4-Cu9S8 cube, then removing Cu2O, and carrying out centrifugation, washing and drying to prepare the Cu7S4-Cu9S8 heterostructure hollow cube catalyst. The controllable preparation method has the advantages of simple process,low cost, low environment pollution and simple required equipment. The Cu7S4-Cu9S8 heterostructure hollow cube catalyst prepared by the controllable preparation method, as a catalyst, is applied to oxidize benzylamine into imine under the action of visible light.

Description

Technical field [0001] The invention relates to the field of catalysts, in particular to a Cu 7 S 4 -Cu 9 S 8 Controllable preparation method and application of heterostructure hollow cube near catalyst. Background technique [0002] Chalcogenide semiconductor compounds, such as CuS, have been widely studied in recent years. However, the low charge separation efficiency of electron-hole pairs severely restricts its commercial development. In order to improve the catalytic effect of this photocatalyst, it is necessary to combine it with other semiconductor photocatalysts. However, it can be found in previous research reports that CuS is generally combined with other semiconductors to prepare composite catalysts, which still presents some challenges. [0003] Copper sulfide (Cu x S y , X / y=1-2) is a kind of photothermal conversion nanomaterials with plasmon resonance effect. Due to the action of 3d electrons, a series of non-stoichiometric compounds with a band gap of 1.2-2.4eV can...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C07C249/02C07C251/24
CPCB01J27/04B01J35/004B01J35/02C07C249/02C07C251/24
Inventor 陈亚杰高海璟田国辉
Owner HEILONGJIANG UNIV
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