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Composite photo-catalyst with molybdenum disulfide (MoS2) nanosheet/cadmium sulfide (CdS) nanowire core-shell structure

A core-shell structure and nanowire technology, which is applied in the field of MoS2 nanosheet/CdS nanowire core-shell structure composite photocatalyst and its preparation, can solve the problem of not having special properties of core-shell structure, difficult CdS photostability, and complex preparation methods etc. to achieve good photostability, improve photocatalytic activity, and improve photostability

Inactive Publication Date: 2016-06-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of this patent is relatively complicated. At the same time, the composite photocatalyst prepared by this patent has no specific structural mode between the two constituent units, and does not have the special properties of the core-shell structure, so it is difficult to effectively improve the photostability of CdS.

Method used

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  • Composite photo-catalyst with molybdenum disulfide (MoS2) nanosheet/cadmium sulfide (CdS) nanowire core-shell structure
  • Composite photo-catalyst with molybdenum disulfide (MoS2) nanosheet/cadmium sulfide (CdS) nanowire core-shell structure
  • Composite photo-catalyst with molybdenum disulfide (MoS2) nanosheet/cadmium sulfide (CdS) nanowire core-shell structure

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1 Preparation of CdS Nanowire Precursor

[0030] Dissolve the copper reagent (sodium diethyldithiocarbamate) in an appropriate amount of deionized water at room temperature, then add chromium chloride at a molar ratio of copper reagent to chromium chloride of 2:1, and stir magnetically for 2 hours to obtain CdS precursor Cd(S 2 CNEt 2 ) 2 , the obtained product was washed three times with deionized water and ethanol respectively, the precipitate was collected by centrifugation, and dried in vacuum.

Embodiment 2

[0031] Example 2 Preparation of CdS nanowires

[0032] With the Cd(S) that makes in embodiment 1 2 CNEt 2 ) 2Add 0.9g~1.3g into the polytetrafluoroethylene reactor, add ethylenediamine to 80% of the volume of the reactor, magnetically stir until it is completely dissolved, react it at 180°C for 24 hours, and cool the obtained product to room temperature naturally, respectively Wash with deionized water and ethanol several times, collect the precipitate by centrifugation, and dry in vacuum to obtain CdS nanowires.

Embodiment 3

[0033] Example 3 Preparation of MoS 2 / CdS composite material

[0034] Ultrasonic disperse 50 mg of the CdS nanowires prepared in Example 2 in hydrochloric acid at pH=1, and magnetically stir for 24 hours to obtain acid-treated CdS nanowires, and ultrasonically disperse the acid-treated CdS nanowires in 40 mL of water , then add 25mg sodium molybdate dihydrate and 50mg thioacetamide successively, stir evenly, transfer to a polytetrafluoroethylene reactor, heat up to 200°C, and keep the temperature for 24 hours; the obtained product is naturally cooled to room temperature, and used respectively Wash with ionized water and ethanol several times, collect the precipitate by centrifugation, and dry in vacuum to obtain MoS 2 Nanosheet / CdS nanowire core-shell structure composite photocatalyst.

[0035] figure 1 For the pure CdS nanowires obtained in Example 2 and the two-dimensional MoS obtained in Example 3 2 X-ray diffraction pattern of nanosheet / CdS nanowire core-shell struc...

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Abstract

The invention discloses a composite photo-catalyst with a molybdenum disulfide (MoS2) nanosheet / cadmium sulfide (CdS) nanowire core-shell structure, and a preparation method of the composite photo-catalyst, belonging to the technical fields of material preparation and photo-catalysis. The composite photo-catalyst takes a one-dimensional CdS nanowire as a core and takes a two-dimensional MoS2 nanosheet as a shell, and is compounded by an electrostatic self-assembly method through a hydrothermal process. The raw materials of the composite photo-catalyst can be easily obtained, and the preparation method is simple in process and convenient to operate; the prepared composite material with the core-shell structure is better in stability, has excellent photocatalytic activity and can be used for catalyzing photolysis of water for preparing hydrogen; furthermore, the core-shell structure is capable of effectively preventing the sulfur loss of the CdS nanowire and slowing down photocorrosion, and has wide application prospect in the field of photo-catalysis.

Description

technical field [0001] The invention belongs to the technical field of material preparation and visible light photocatalysis, and specifically relates to a MoS 2 Nanosheet / CdS nanowire core-shell structure composite photocatalyst and preparation method thereof. Background technique [0002] Today's energy and environmental problems are becoming more and more serious, which has attracted extensive attention worldwide. Photocatalytic technology is a potential ideal way to solve the two problems of energy and environment. At present, the main reasons restricting the application of photocatalysts in actual production are the low utilization rate of solar energy and the insufficient stability of photocatalysts, so that they cannot be recycled. Therefore, in order to better utilize solar energy, the preparation of efficient and stable visible light photocatalysts has far-reaching significance for solving current energy and environmental problems. [0003] Chalcogenides are thos...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/02C01B3/04
CPCC01B3/042B01J27/051C01B2203/1005C01B2203/1041B01J35/00B01J35/30B01J35/39Y02E60/36
Inventor 刘平杨宇付贤智陈旬戴文新方志斌郑祖阳
Owner FUZHOU UNIV
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