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CdS/MoSx composite material and one-step electrochemical deposition preparation method and application thereof

A composite material and electrochemical technology, applied in the field of CdS/MoSx composite material and its one-step electrochemical deposition preparation, can solve the problems of long preparation time and unfavorable recycling, achieve optimal photocatalytic activity, increase conversion utilization rate, and be easy to recycle Effect

Active Publication Date: 2021-01-15
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects or deficiencies that the existing photocatalyst preparation process is generally that the photocatalyst and the cocatalyst are synthesized separately, the preparation time is long, and it is in a powder state, which is not conducive to recovery, and to provide a one-step electrochemical deposition to prepare CdS / MoS x Composite Methods

Method used

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  • CdS/MoSx composite material and one-step electrochemical deposition preparation method and application thereof
  • CdS/MoSx composite material and one-step electrochemical deposition preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] A CdS / MoS x The preparation method of composite material, comprises the following steps:

[0051] (1) Prepare 30mL of 0.06mol / L CdCl 2 , 0.2mol / LNa 2 S 2 o 3 and 0.012mol / LMoCl 5 mixture.

[0052] (2) Adjust the pH of the mixed solution in step (1) to 2.3 with a citric acid buffer solution, and use it as an electrolyte solution.

[0053] (3) Hydrophilic treatment of carbon cloth: Ultrasonic cleaning with concentrated nitric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0054] (4) Under normal temperature and pressure, a three-electrode system is used to carry out electrochemical deposition in the electrolyte solution of step (2), the working electrode is a carbon cloth after hydrophilic treatment, the reference electrode is a saturated calomel electrode, and the counter electrode is carbon rod.

[0055] (5) The electrodeposition method in step (4) is cyclic voltammetry, and the potential range is -1.249~0.951V vs.SCE , the electrode ...

Embodiment 2

[0058] A CdS / MoS x The preparation method of composite material, comprises the following steps:

[0059] (1) Prepare 30mL of 0.06mol / L CdCl 2 , 0.2mol / L Na 2 S 2 o 3 and 0.02mol / L MoCl 5 mixture.

[0060] (2) Adjust the pH of the mixed solution in step (1) to 4 with a citric acid buffer solution, and use it as an electrolyte solution.

[0061] (3) Cleaning of the titanium mesh: Ultrasonic cleaning with 1 mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0062] (4) Under normal temperature and pressure, a three-electrode system is used to carry out electrochemical deposition in the electrolyte solution of step (2), the working electrode is a cleaned titanium mesh, the reference electrode is a saturated calomel electrode, and the counter electrode is a carbon rod.

[0063] (5) The electrodeposition method in step (4) is cyclic voltammetry, and the potential range is -1.496~1.004V vs.SCE , the electrode potential of the saturated...

Embodiment 3

[0066] A CdS / MoS x The preparation method of composite material, comprises the following steps:

[0067] (1) Prepare 30mL of 0.06mol / L CdCl 2 , 0.012mol / L MoCl 5 and 0.2mol / L Na 2 S 2 o 3 mixture.

[0068] (2) Adjust the pH of the mixed solution in step (1) to 2.21 with a citric acid buffer solution, and use it as an electrolyte solution.

[0069] (3) Cleaning of the titanium mesh: Ultrasonic cleaning with 1 mol / L hydrochloric acid, deionized water and absolute ethanol for 10 minutes respectively.

[0070] (4) Under normal temperature and pressure, a three-electrode system is used to carry out electrochemical deposition in the electrolyte solution of step (2), and the working electrode is a cleaned titanium mesh (with an area of ​​1.92 cm 2 ), the reference electrode is a saturated calomel electrode, and the counter electrode is a carbon rod;

[0071] (5) The electrodeposition method in step (4) is a constant current density, and the deposition current density is -15mA...

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Abstract

The invention relates to a CdS / MoSx composite material and a one-step electrochemical deposition preparation method and application thereof. The preparation method comprises the following steps of: bytaking a self-supporting material as a substrate, carrying out electrochemical deposition by utilizing an electrolyte containing a cadmium source, a molybdenum source and a sulfur source to obtain the CdS / MoSx composite material. According to the method, transition metal sulfide MoSx instead of precious metal is adopted as a cocatalyst, the problems of scarcity and high cost of the precious metalare solved, CdS / MoSx is fixed to the substrate by one-step electro-deposition through an electrochemical method, and controllable synthesis of CdS / MoSx can be achieved; according to the prepared CdS / MoSx composite material, visible light can be fully utilized, the conversion utilization rate of solar energy is increased, and the CdS / MoSx composite material has good light response to a visible light region and has good photocatalytic activity; and the composite material is easy to recycle, and a brand-new way is provided for the photocatalytic hydrogen production technology of CdS.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic materials, in particular to a CdS / MoS x Composite materials and their one-step electrochemical deposition preparation methods and applications. [0002] technical background [0003] With the development of modern industry, energy resources are gradually reduced or even exhausted, and environmental pollution is becoming more and more serious. Energy shortage and environmental degradation are major problems facing human beings and need to be solved urgently. Therefore, the development and utilization of renewable energy is of great significance to the realization of sustainable development strategy. Among them, solar energy is considered as a promising clean and renewable energy source. Solar energy is inexhaustible and inexhaustible. As a primary energy source, it has broad application prospects. The research and application of solar energy has been widely valued all over th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/34C01B3/04
CPCB01J27/051B01J37/348C01B3/042C01B2203/0277C01B2203/1094B01J35/39Y02E60/36Y02P20/133
Inventor 张京涛曾冬妮张珍陈颖
Owner GUANGDONG UNIV OF TECH