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Optimization of photoelectrochemical performance of Ag2S/TiO2 interface by successive ionic layer adsorption and reaction

Published online by Cambridge University Press:  11 February 2020

Xinhua Zheng Open the ORCID record for Xinhua Zheng [Opens in a new window] ,
Shikai Liu ,
Yanhong Gu ,
Subhabrata Das ,
Jie Zhao Open the ORCID record for Jie Zhao [Opens in a new window]  and
Yueyang Gao
Xinhua Zheng
Affiliation:
Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing Institute of Petrochemical Technology, Beijing102617, China
Shikai Liu*
Affiliation:
School of Material Science and Engineering, Henan University of Technology, Zhengzhou450000, China
Yanhong Gu*
Affiliation:
Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing Institute of Petrochemical Technology, Beijing102617, China
Subhabrata Das
Affiliation:
Langmuir Center of Colloids and Interfaces, Columbia University in the City of New York, 500 W. 120th St, Mudd, New York, NY10027, USA
Jie Zhao
Affiliation:
Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development, Beijing Institute of Petrochemical Technology, Beijing102617, China
Yueyang Gao
Affiliation:
School of Automation and Electrical Engineering, Shenyang Ligong University, Shenyang110168, China
*
Address all correspondence to Shikai Liu at shikai_liu@haut.edu.cn and Yanhong Gu at guyanhong@bipt.edu.cn
Address all correspondence to Shikai Liu at shikai_liu@haut.edu.cn and Yanhong Gu at guyanhong@bipt.edu.cn
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Abstract

The narrow bandgap of Ag2S quantum dots was used to decorate TiO2 nanotube arrays (TiO2 NTAs) by the successive ionic layer adsorption and reaction (SILAR) method to enhance its photoelectrochemical performance. The micromorphology of the photoanode films prepared by the SILAR under different parameters (including different cycle times, capillary spot sample, and ultrasound-assisted) was systematically analyzed. The photoanode film Ag2S/TiO2 prepared by the SILAR under the ultrasound-assisted method shows Ag2S evenly distributed in TiO2 NTAs. At the same time, the corresponding photoabsorption range has been extended to the visible area, while the photocurrent density and photoconversion efficiency have been increased to ~1.8 mA/cm2 and 0.6%, respectively.

Type
Research Letters
Information
MRS Communications , Volume 10 , Issue 1 , March 2020 , pp. 194 - 199
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Copyright
Copyright © Materials Research Society 2020

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