Synthesis of ZnO/Cu2S core/shell nanorods and their enhanced photoelectric performance

Keying Guo; Xuhuang Chen; Jianhua Han; Zhifeng Liu

doi:10.1007/s10971-014-3426-1

Synthesis of ZnO/Cu₂S core/shell nanorods and their enhanced photoelectric performance

Keying Guo, Xuhuang Chen^*, Jianhua Han, Zhifeng Liu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

In this work, two kinds of ZnO/Cu₂S core/shell nanorods (NRs) have been successfully synthesized from ZnO NRs for photoelectrochemical (PEC) water splitting by a versatile hydrothermal chemical conversion method (H-ZnO/Cu₂S core/shell NRs) and successive ionic layer adsorption and reaction method (S-ZnO/Cu₂S core/shell NRs), respectively. The photoelectrode is composed of a core/shell structure where the core portion is ZnO NRs and the shell portion is Cu₂S nanoparticles sequentially located on the surface. The ZnO NRs array provides a fast electron transport pathway due to its high electron mobility properties. The optical property of both two kinds of core/shell NRs was characterized, and enhanced absorption spectrum was discovered. Our PEC system produced very high photocurrent density and photoconversion efficiency under 1.5 AM irradiation for hydrogen generation. On the basis of a versatile chemical conversion process based on the ion-by-ion growth mechanism, H-ZnO/Cu₂S core/shell NRs exhibit a much higher photocatalytic activity than S-ZnO/Cu₂S core/shell NRs. The photocurrent density and photoconversion efficiency of H-ZnO/Cu₂S core/shell NRs are up to 20.12 mA cm^-2 at 0.85 V versus SCE and 12.81 % at 0.40 V versus SCE, respectively.

Original language	English
Pages (from-to)	92-99
Number of pages	8
Journal	Journal of Sol-Gel Science and Technology
Volume	72
Issue number	1
DOIs	https://doi.org/10.1007/s10971-014-3426-1
State	Published - Oct 2014
Externally published	Yes

Keywords

Chemical conversion
Photoelectric performance
SILAR
ZnO

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s10971-014-3426-1

Cite this

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title = "Synthesis of ZnO/Cu2S core/shell nanorods and their enhanced photoelectric performance",

abstract = "In this work, two kinds of ZnO/Cu2S core/shell nanorods (NRs) have been successfully synthesized from ZnO NRs for photoelectrochemical (PEC) water splitting by a versatile hydrothermal chemical conversion method (H-ZnO/Cu2S core/shell NRs) and successive ionic layer adsorption and reaction method (S-ZnO/Cu2S core/shell NRs), respectively. The photoelectrode is composed of a core/shell structure where the core portion is ZnO NRs and the shell portion is Cu2S nanoparticles sequentially located on the surface. The ZnO NRs array provides a fast electron transport pathway due to its high electron mobility properties. The optical property of both two kinds of core/shell NRs was characterized, and enhanced absorption spectrum was discovered. Our PEC system produced very high photocurrent density and photoconversion efficiency under 1.5 AM irradiation for hydrogen generation. On the basis of a versatile chemical conversion process based on the ion-by-ion growth mechanism, H-ZnO/Cu2S core/shell NRs exhibit a much higher photocatalytic activity than S-ZnO/Cu2S core/shell NRs. The photocurrent density and photoconversion efficiency of H-ZnO/Cu2S core/shell NRs are up to 20.12 mA cm-2 at 0.85 V versus SCE and 12.81 % at 0.40 V versus SCE, respectively.",

keywords = "Chemical conversion, Photoelectric performance, SILAR, ZnO",

author = "Keying Guo and Xuhuang Chen and Jianhua Han and Zhifeng Liu",

note = "Funding Information: Acknowledgments The authors gratefully acknowledge the financial support from the Research Foundation for Hubei Provincial Key Laboratory of Green Materials for Light Industry (No. 20130108).",

year = "2014",

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AU - Guo, Keying

AU - Chen, Xuhuang

AU - Han, Jianhua

AU - Liu, Zhifeng

N1 - Funding Information: Acknowledgments The authors gratefully acknowledge the financial support from the Research Foundation for Hubei Provincial Key Laboratory of Green Materials for Light Industry (No. 20130108).

PY - 2014/10

Y1 - 2014/10

N2 - In this work, two kinds of ZnO/Cu2S core/shell nanorods (NRs) have been successfully synthesized from ZnO NRs for photoelectrochemical (PEC) water splitting by a versatile hydrothermal chemical conversion method (H-ZnO/Cu2S core/shell NRs) and successive ionic layer adsorption and reaction method (S-ZnO/Cu2S core/shell NRs), respectively. The photoelectrode is composed of a core/shell structure where the core portion is ZnO NRs and the shell portion is Cu2S nanoparticles sequentially located on the surface. The ZnO NRs array provides a fast electron transport pathway due to its high electron mobility properties. The optical property of both two kinds of core/shell NRs was characterized, and enhanced absorption spectrum was discovered. Our PEC system produced very high photocurrent density and photoconversion efficiency under 1.5 AM irradiation for hydrogen generation. On the basis of a versatile chemical conversion process based on the ion-by-ion growth mechanism, H-ZnO/Cu2S core/shell NRs exhibit a much higher photocatalytic activity than S-ZnO/Cu2S core/shell NRs. The photocurrent density and photoconversion efficiency of H-ZnO/Cu2S core/shell NRs are up to 20.12 mA cm-2 at 0.85 V versus SCE and 12.81 % at 0.40 V versus SCE, respectively.

AB - In this work, two kinds of ZnO/Cu2S core/shell nanorods (NRs) have been successfully synthesized from ZnO NRs for photoelectrochemical (PEC) water splitting by a versatile hydrothermal chemical conversion method (H-ZnO/Cu2S core/shell NRs) and successive ionic layer adsorption and reaction method (S-ZnO/Cu2S core/shell NRs), respectively. The photoelectrode is composed of a core/shell structure where the core portion is ZnO NRs and the shell portion is Cu2S nanoparticles sequentially located on the surface. The ZnO NRs array provides a fast electron transport pathway due to its high electron mobility properties. The optical property of both two kinds of core/shell NRs was characterized, and enhanced absorption spectrum was discovered. Our PEC system produced very high photocurrent density and photoconversion efficiency under 1.5 AM irradiation for hydrogen generation. On the basis of a versatile chemical conversion process based on the ion-by-ion growth mechanism, H-ZnO/Cu2S core/shell NRs exhibit a much higher photocatalytic activity than S-ZnO/Cu2S core/shell NRs. The photocurrent density and photoconversion efficiency of H-ZnO/Cu2S core/shell NRs are up to 20.12 mA cm-2 at 0.85 V versus SCE and 12.81 % at 0.40 V versus SCE, respectively.

KW - Chemical conversion

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