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Preparation and application of hollow hierarchical heterostructure three-component sulfide photoelectric material

A technology of heterostructures and optoelectronic materials, applied in the fields of luminescent materials, cadmium sulfide, chemical instruments and methods, etc., can solve the problems of under-researched, complex synthesis steps, lengthy nanomaterials, etc. Absorption efficiency, effect of matching band structure

Pending Publication Date: 2022-06-24
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, creating nanomaterials with hollow hierarchical structures usually undergoes lengthy and complicated synthetic steps
In particular, the integration of hybrid materials with tandem band structures and tight interfaces into a hollow framework has not been fully studied due to the lack of efficient fabrication strategies

Method used

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  • Preparation and application of hollow hierarchical heterostructure three-component sulfide photoelectric material
  • Preparation and application of hollow hierarchical heterostructure three-component sulfide photoelectric material
  • Preparation and application of hollow hierarchical heterostructure three-component sulfide photoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A three-component ZnIn with hollow hierarchical heterostructure 2 S 4 / CnIn 2 S 4 / CdS material preparation, such as figure 1 It mainly includes the following steps:

[0053] (1) Preparation of Cd 3 (C 3 N 3 S 3 ) 2 ;

[0054] Preparation of Cd by stirring at room temperature 3 (C 3 N 3 S 3 ) 2 Octahedron, mainly including: Weigh 2.7498g of CdCl 2 Dissolve in 100mL ultrapure aqueous solution and stir to form transparent solution A, then weigh 1.7727g of thiocyanate and dissolve it in 100mL 0.015M NaOH solution to form solution B; under strong stirring, add solution B dropwise to A Then keep vigorous stirring for 5 minutes, and react under slow stirring at room temperature for 12 hours; after the reaction is over, centrifugal washing, the obtained white product is washed with ethanol and collected by centrifugation (three cycles), and finally it is placed at 60 ° C. 12 hours in a vacuum oven. Scanning Electron Microscope (SEM) to observe the synthesized ...

Embodiment 2

[0058] Based on three-component ZnIn with hollow hierarchical heterostructure 2 S 4 / CnIn 2 S 4 / CdS photoelectrochemical sensor

[0059] (1) Cleaning of ITO electrode and preparation of modified electrode

[0060] Preparation of ZIS / CIS / CdS-HHOC / ITO electrodes: ITO conductive substrate (3.0 × 1.0 cm 2 ) was placed in a 1M NaOH (Vwater:Vacetone=1:1) solution for sonication for 30 min, then washed three times with absolute ethanol and ultrapure water, and then placed in a 65°C oven to dry for 45 min. Store the cleaned ITO conductive substrate in a cool and dark place. Weigh 3 mg of the prepared ZIS / CIS / CdS-HHOC powder into 1 mL of ultrapure water, and stir to mix for 6 hours. Take 10 μL to the concentration of 3 mg·mL -1 The above suspension is added dropwise on the pretreated ITO conductive glass, and the active area is 0.0961cm 2 , placed in an oven at 60 °C for 12 h, and cooled to room temperature to obtain a stable ZIS / CIS / CdS-HHOC / ITO electrode.

[0061] (2) Prepa...

Embodiment 3

[0067] Three-component ZnIn with hollow hierarchical heterostructure prepared in Example 1 2 S 4 / CnIn 2 S 4 Application of / CdS materials in photocatalytic hydrogen production.

[0068] The catalyst performance was tested by using the photocatalytic reaction system and gas chromatography of Zhongjiao Jinyuan. 50 mg of the ZIS / CIS / CdS-HHOC material prepared in Example 1 was dispersed in a solution containing 90vt% deionized water and 10vt% lactic acid. The photocatalytic reaction was carried out in a 250 mL airtight reaction. Before the reaction, nitrogen gas was introduced for 30 min to remove excess air in the system. A 300W Xe lamp was used as the light source, and a 420nm cut-off filter was installed to filter out the ultraviolet light in the light source. During the reaction, the suspension was continuously stirred and thoroughly exposed to light. In addition, the reaction temperature was controlled around 25°C by external condensing water. During the reaction, stir...

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Abstract

The invention discloses preparation and application of a three-component sulfide photoelectric material with a hollow hierarchical heterostructure, a coordination polymer Cd3 (C3N3S3) 2 material is used as a self-template material, and a three-component ZnIn2S4 / CnIn2S4 / CdS material with the hollow hierarchical heterostructure is prepared by a one-step solvothermal synthesis method. The method specifically comprises the following steps: (1) firstly, preparing an octahedron with an adjustable size; (2) Zn (NO3) 2.6 H2O, InCl3. 4H2O and thioacetamide are used as precursors of a ZnIn2S4 component, and the precursors and a self-template Cd3 (C3N3S3) 2 material are subjected to a solvothermal reaction to obtain the three-component ZnIn2S4 / CnIn2S4 / CdS (ZIS / CIS / CdS-HHOC) with the hollow hierarchical heterostructure. According to the preparation method, the tedious process of removing a template is omitted, operation is very easy, and the method for preparing the photoelectric active material with the excellent photoelectric conversion performance is provided. The prepared material has a large specific surface area, a matched energy band structure, a close contact interface, a high light utilization rate and a thin shell layer and nanosheets, and has an extremely wide application prospect in the fields of photocatalytic degradation, CO2 reduction, hydrogen production, photosynthesis, antibiosis and photoelectric sensing.

Description

technical field [0001] The invention belongs to the fields of novel nanometer functional materials and photoelectrochemistry, in particular to the preparation and application of a hollow graded heterostructure three-component sulfide photoelectric material. Background technique [0002] Photoelectrochemistry is a dynamic discipline developed from electrochemistry, dedicated to exploring the conversion of light energy into electrical energy and the mutual conversion of electrical energy and chemical energy. The working principle of photoelectrochemistry is to study the oxidation or reduction reaction of material molecules or ions in the ground state or excited state on the basis of the combination of photochemistry and electrochemistry. technical means for detection and other purposes. The photoelectrochemical reaction process mainly refers to: the photoelectric active material can excite electrons (participate in the reduction reaction) and holes (participate in the oxidati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00C01G11/02C09K11/02C09K11/62
CPCC01G15/006C01G11/02C09K11/623C09K11/02C01P2004/82C01P2004/04C01P2002/85C01P2002/72
Inventor 高文华彭靖俊陈佳阳郑德论林镇彬陈耀文
Owner SHANTOU UNIV
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