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Ag2ZnSnS4/Mo structure photo-anode with visible-light response, preparation method of photo-anode and application of photo-anode

A structured light and visible light technology, applied in chemical instruments and methods, electrodes, chemical/physical processes, etc., to achieve the effect of excellent photoelectric conversion efficiency

Active Publication Date: 2019-03-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, currently Ag 2 ZnSnS 4 Research on photocatalysts is mainly used in powder hydrogen generation and solar cell light absorbing layers, etc., and there is little research on Ag 2 ZnSnS 4 Research Report on Hydrogen Production from Water Splitting as Photoanode in Photoelectrolyte Cell

Method used

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  • Ag2ZnSnS4/Mo structure photo-anode with visible-light response, preparation method of photo-anode and application of photo-anode
  • Ag2ZnSnS4/Mo structure photo-anode with visible-light response, preparation method of photo-anode and application of photo-anode
  • Ag2ZnSnS4/Mo structure photo-anode with visible-light response, preparation method of photo-anode and application of photo-anode

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Example 1 Ag 2 ZnSnS 4 Preparation of / Mo structured photoanode

[0055] (1) Ultrasonic cleaning of molybdenum mesh:

[0056] First use 5mol / L concentrated hydrochloric acid and 5mol / L concentrated sodium hydroxide solution to ultrasonically clean for 1.0 hours (frequency 40KHz), then use acetone, deionized water and ethanol to ultrasonically clean for 1.0 hour (frequency 40KHz), after ultrasonic cleaning The surface of molybdenum mesh presents a metallic luster.

[0057] (2) Deposit metal Ag:

[0058] First configure 100ml of 0.01mol / L silver nitrate solution, and then deposit metallic silver on the molybdenum grid by controlling the deposition voltage and deposition charge. The deposition voltage is 0.0V Vs SCE (calomel electrode), and the deposition charge is 0.8C / cm 2 , to obtain the Ag / Mo precursor.

[0059] (3) Deposit metal Sn:

[0060] First configure the 0.02mol / L stannous chloride solution of 100ml, then deposit metal tin on the Ag / Mo net by control...

Embodiment 2

[0065] Example 2 Ag with different Zn / Sn / Ag deposition charges 2 ZnSnS 4 Preparation of / Mo structured photoanode This example prepares Ag with different Zn / Sn / Ag deposition charges 2 ZnSnS 4 / Mo structure photoanode, prepared 2 kinds of photoanodes altogether, its preparation method is the same as embodiment 1, difference is: the first kind is to deposit these three kinds of metal elements in step (2)(3)(4) in embodiment 1 The simultaneous reduction of charge is: 0.4C / cm 2 (Ag), 0.8C / cm 2 (Sn), 0.8C / cm 2 (Zn); the second is to increase the amount of these three kinds of metal element deposition charge in step (2) (3) (4) in embodiment 1 while being: 1.2C / cm 2 (Ag), 2.4C / cm 2 (Sn), 2.4C / cm 2 (Zn). However, these two Ag 2 ZnSnS 4 The ratio of deposited charges in the Zn / Sn / Ag precursor in the / Mo structured photoanode remains 2.0:2.0:1.0.

[0066] Schematic diagram of a synthetic photoanode:

[0067] Embodiment 1 and 2 prepare Ag 2 ZnSnS 4 The specific steps of ...

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Abstract

The invention provides an Ag2ZnSnS4 / Mo structure photo-anode with visible-light response, a preparation method of the photo-anode and an application of the photo-anode. The method includes the steps:electro-depositing the metal elements of silver, tin and zinc on a molybdenum mesh by taking the molybdenum mesh as a substrate, taking silver nitrate as a silver source, taking stannous chloride as atin source and taking zinc chloride as a zinc source; vulcanizing and calcining the metal elements. The method has the advantages of simplicity, mild reaction conditions, low cost, no pollution and the like, and has a high commercial application prospect. The Ag2ZnSnS4 / Mo structure photo-anode is quite high in photoelectric conversion efficiency and can be used for the fields of solar batteries,photoelectric catalysis, photocatalysis and the like. Experiment research finds that the photo-current density of the Ag2ZnSnS4 / Mo structure photo-anode in a photoelectrochemical test exceeds 4mA / cm<2>, the photoelectric conversion efficiency of the photo-anode in a main light absorption area reaches 25%, and importantly, the photo-anode shows an excellent hydrogen evolution property when the photoelectrochemical test is performed in a formed electrolytic tank.

Description

technical field [0001] The invention relates to the fields of new energy and photoelectrochemical technology, in particular to an Ag with visible light response 2 ZnSnS 4 / Mo structured photoanode and its preparation method and application. Background technique [0002] With the gradual depletion of non-renewable energy such as oil, coal and natural gas, clean and renewable energy has become a common goal pursued by mankind. Because hydrogen has the advantages of high energy density, green environmental protection and renewable, it is considered as a new generation of energy in the 21st century. As we all know, photocatalysts and photoelectrodes absorb sunlight to generate photoelectrons, and reduce water molecules to generate hydrogen. This is the most ideal way to obtain hydrogen energy in the future. The photoelectric catalytic reaction mechanism refers to the photogenerated electron-hole pairs generated by light irradiation on the surface of the semiconductor electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C25B11/04C25B11/08
CPCC25B1/04C25B11/04B01J27/0515B01J35/39Y02E60/36Y02P20/133
Inventor 张倩倩梁希壮王朋黄柏标张晓阳秦晓燕王泽岩郑昭科刘媛媛
Owner SHANDONG UNIV
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