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Method for preparing Mo-doped CdS photocatalyst by cation replacement method

A photocatalyst and displacement technology, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., to achieve the effect of improving the photocatalytic reaction rate, requiring low preparation conditions, and promoting separation

Active Publication Date: 2020-04-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molybdenum ion-doped CdS photocatalysts have not been reported

Method used

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  • Method for preparing Mo-doped CdS photocatalyst by cation replacement method
  • Method for preparing Mo-doped CdS photocatalyst by cation replacement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 4.7g (0.020mol) of cadmium acetate and 3.6g (0.032mol) of potassium thioacetate and dissolve them in 60mL of ethylene glycol. After stirring for 1 hour, transfer the resulting mixed solution into a 100mL polytetrafluoroethylene reactor , sealed with a steel sleeve and placed in a blast drying oven, heated to 180°C and kept for 24 hours, washed and dried the obtained yellow precipitate to obtain CdS nanorods; take 100mg (0.692mmol) CdS nanorods and disperse them in 100mL ethanol In, add 30mg (0.109mmol) MoCl 5 After dissolving, vigorously stirred in vacuum for 2 h, the obtained orange sample was washed and dried to obtain Mo-doped CdS nanorods.

[0022] figure 1 It is the XRD comparison chart of the synthesized undoped CdS and Mo-doped CdS nanorods. It can be seen from the figure that the doping of Mo to CdS does not change the crystal phase structure of CdS.

Embodiment 2

[0024] Weigh 4.4g (0.019mol) of cadmium acetate and 6.4g (0.056mol) of potassium thioacetate and dissolve them in 60mL of ethylene glycol. After stirring for 1 hour, transfer the resulting mixed solution into a 100mL polytetrafluoroethylene reactor , packaged with a steel sleeve and placed in a blast drying oven, heated to 180°C and kept for 12 hours, washed and dried the obtained yellow precipitate to obtain CdS nanorods; take 100mg (0.692mmol) CdS nanorods and disperse them in 100mL ethanol In, add 100mg (0.367mmol) MoCl 5 After dissolving, vigorously stirred in vacuum for 2 h, the obtained orange sample was washed and dried to obtain Mo-doped CdS nanorods.

Embodiment 3

[0026] Weigh 16.0g (0.068mol) of cadmium acetate and 1.8g (0.016mol) of potassium thioacetate and dissolve them in 50mL of ethylene glycol. After stirring for 1 hour, transfer the resulting mixed solution into a 100mL polytetrafluoroethylene reactor , sealed with a steel sleeve and placed in a blast drying oven, heated to 160°C and kept for 12 hours, and the obtained yellow precipitate was washed and dried to obtain CdS nanorods; 100 mg (0.692 mmol) of CdS nanorods were dispersed in 100 mL of ethanol In, add 180mg (0.660mmol) MoCl 5 After dissolving, vigorously stir in vacuum for 1 h, wash and dry the obtained orange sample to obtain Mo-doped CdS nanorods.

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Abstract

The invention discloses a preparation method for preparing a Mo-doped CdS photocatalyst by cation replacement method. Cadmium acetate and potassium thioacetate are used as precursors, ethylene glycolis used as a solvent, CdS nanorods are synthesized through a solvothermal method, then MoCl5 is used as a precursor and ethanol is used as a medium, and cation replacement method is adopted for dopingMo ions into CdS, and the Mo-doped CdS photocatalyst is prepared. According to the photocatalyst, an impurity energy level is introduced through doping of Mo ions; vacancies are generated in crystallattices to form electron traps; therefore, the response range of CdS to visible light is expanded; the carrier migration rate is increased, photon-generated carrier separation is promoted, photon-generated carrier recombination is inhibited, more active sites are provided, and the photocatalytic activity of CdS is greatly improved; compared with the prior art, the preparation method has the advantages of simple equipment, convenience in operation and high synthesis efficiency.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing a Mo-doped CdS photocatalyst by a cation replacement method. Background technique [0002] With the rapid development of the economy, the problems of environmental pollution and energy shortage have become increasingly prominent, becoming two major challenges facing the development of human society in the 21st century. Semiconductor photocatalysis technology is an emerging technology that uses solar energy conversion and storage as the core, drives photocatalytic reactions with light energy, and converts solar energy into chemical energy. It is considered to be an ideal way to solve the two problems of energy and the environment. However, the application of photocatalytic technology in actual production still faces many problems. For example, low quantum efficiency, narrow photoresponse range of photocatalysts, poor stability, ...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/00B01J37/30C01B3/04
CPCB01J37/30B01J27/051C01B3/042C01B2203/1088B01J35/39Y02E60/36
Inventor 刘平江灿琨高帆张璐璐黄学烟
Owner FUZHOU UNIV
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