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A cds/mos2/mo double-layer core-shell photoelectrode

A technology of core-shell structure and photoelectrode, which is applied in the field of photoelectrochemistry, can solve the problems of unfavorable catalyst structure regulation and constitutive relationship, increase the synthesis cost of photocatalytic system, and high price, and achieve high photoelectric conversion efficiency, excellent performance and excellent preparation method simple effect

Active Publication Date: 2019-02-19
SHANDONG UNIV
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Problems solved by technology

However, due to the limited natural reserves of precious metals and high prices, it will increase the synthesis cost of the photocatalytic system; some researchers also use MoS 2 As an additive, CdS / MoS was prepared by high temperature sintering technique 2 Composite hydrogen production photocatalyst, but the preparation method is high temperature, which is not conducive to the in-depth study of the structure regulation of the catalyst and its structure-property relationship

Method used

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  • A cds/mos2/mo double-layer core-shell photoelectrode
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  • A cds/mos2/mo double-layer core-shell photoelectrode

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preparation example Construction

[0031] In one embodiment of the present application, a CdS / MoS 2 The preparation method of Mo / Mo double-layer core-shell structure photoelectrode, the steps are as follows:

[0032] (1) The molybdenum mesh was ultrasonically cleaned with concentrated hydrochloric acid and concentrated alkali solution for 10 hours, and then cleaned with deionized water, ethanol and acetone so that the surface was bright;

[0033] (2) Soluble cadmium salt is dissolved in deionized water;

[0034] (3) Metal cadmium is deposited on the molybdenum grid by controlling the deposition voltage and the deposition time;

[0035] (4) The deposited molybdenum mesh is placed in a hydrogen sulfide atmosphere and vulcanized at 300° C. to 600° C. to obtain the desired photoelectrode.

[0036] As a preferred solution, the soluble cadmium salt is cadmium nitrate, cadmium chloride or cadmium acetate.

[0037] As a preferred scheme, the deposition voltage is -1.5 to -2.0V, and the deposition time is 600-1200s. ...

Embodiment 1

[0040] Example 1: CdS / MoS 2 Preparation of / Mo double-layer core-shell structure photoelectrode

[0041] (1) The molybdenum mesh was ultrasonically cleaned with concentrated hydrochloric acid and concentrated alkali solution for 10 hours, and then cleaned with deionized water, ethanol and acetone so that the surface was bright;

[0042] (2) Soluble cadmium salt is dissolved in deionized water;

[0043](3) Metal cadmium is deposited on the molybdenum grid by controlling the deposition voltage and deposition time, the deposition voltage is -1.8V, and the deposition time is 1200s;

[0044] (4) The deposited molybdenum mesh is placed in a hydrogen sulfide atmosphere and vulcanized at 300° C. to 600° C. to obtain the desired photoelectrode.

[0045] Structural analysis was carried out on the photoelectrode prepared in this embodiment, and the results were as follows: figure 1 -3, where, figure 1 It is the X-ray diffraction pattern of the photoelectrode obtained in this embodime...

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Abstract

The invention discloses a preparation method of a CdS / MoS2 / Mo double-layer core-shell structure photoelectrode. The steps are as follows: using a molybdenum mesh as a base and a soluble cadmium salt as a cadmium source, metal cadmium is deposited on the molybdenum mesh, and the deposited The molybdenum mesh was placed in a hydrogen sulfide atmosphere for sulfidation, and a CdS / MoS2 / Mo double-layer core-shell structure photoelectrode was obtained. The photoelectric conversion efficiency of the CdS / MoS2 / Mo double-layer core-shell structure photoelectrode prepared by the invention is high, and has great application prospect. Experimental studies have found that the photoelectrode hydrogen production performance of the CdS / MoS2 / Mo double-layer core-shell structure photoelectrode has a photoelectric current of more than 3 mA in the photoelectrochemical test, and the photoelectric conversion efficiency in the main light-absorbing region is close to 20%, which is better than the traditional FTO. Cadmium sulfide electrode prepared on glass.

Description

technical field [0001] The invention relates to the field of photoelectrochemical technology, in particular to a CdS / MoS 2 / Mo double-layer core-shell structure photoelectrode and its preparation method and application. Background technique [0002] The use of semiconductor photocatalysts to convert the difficult-to-collect low-density solar energy into high-density and easy-to-use electrical and chemical energy has become one of the most active research fields in the world in recent years. In particular, its unique advantages in photoelectrochemical hydrogen production have attracted widespread attention from scientists all over the world, so extensive theoretical and experimental research on it will have very important strategic and practical significance. [0003] The basic principle of hydrogen production by photolysis of water is based on the semiconductor energy band theory, and the whole process can be divided into three parts: (1) Generation of carriers. When the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B11/02C25B1/04
CPCC25B1/04C25B11/02C25B1/55C25B11/051C25B11/091Y02E60/36Y02P20/133
Inventor 黄柏标朱相林王朋王泽岩张晓阳秦晓燕刘媛媛张倩倩
Owner SHANDONG UNIV
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