Metal oxide top layer as an interfacial promoter on a ZnIn2S4/TiO2 heterostructure photoanode for enhanced photoelectrochemical performance

Mahadeo A. Mahadik; Pravin S. Shinde; Min Cho; Jum Suk Jang

doi:10.1016/j.apcatb.2015.12.001

Metal oxide top layer as an interfacial promoter on a ZnIn₂S₄/TiO₂ heterostructure photoanode for enhanced photoelectrochemical performance

Mahadeo A. Mahadik
, Pravin S. Shinde
, Min Cho^*
, Jum Suk Jang

^*Corresponding author for this work

Environmental Biotechnology

Jeonbuk National University

Research output: Contribution to journal › Journal article › peer-review

61 Scopus citations

Abstract

We designed metal oxide coated ZnIn₂S₄/TiO₂ (ZT) heterostructure photoanodes for enhanced photoelectrochemical performance via hydrothermal and dip-coating methods. The effects of thin metal oxide coating layers, such as TiO₂, Al₂O₃, and SiO₂, on the structural, morphological, optical, and photoelectrocatalytic activity of ZT photoanodes were investigated in detail. The metal oxide coating layers significantly enhanced the photoelectrochemical performance of ZT in the following order: SiO₂/ZT>Al₂O₃/ZT>TiO₂/ZT>ZT, all at pH 11.5 under simulated one sun illumination. A two-fold boost in the photocurrent density of ZT was recorded after a surface coating of a thin SiO₂ layer among the studied metal oxide layers. The charge transfer resistance measured from the electrochemical impedance spectroscopy (EIS) analysis was less for the SiO₂/ZT photoanode, indicating enhanced charge separation between the oxide surface layer and electrolyte. The enhanced photoelectrochemical performance due to the thin SiO₂ coating was attributed to the improved interface properties that led to the effective charge transfer processes in the vicinity of the electrolyte.

Original language	English
Pages (from-to)	337-346
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	184
DOIs	https://doi.org/10.1016/j.apcatb.2015.12.001
State	Published - 2016.05.5

Keywords

Heterostructure photoanode
Hydrogen production
Metal oxide
TiO nanorod
ZnInS nanosheet

Quacquarelli Symonds(QS) Subject Topics

Environmental Sciences
Engineering - Petroleum
Engineering - Chemical

Access to Document

10.1016/j.apcatb.2015.12.001

Cite this

@article{9742674a5e5f4a7e990342bfbf7e5138,

title = "Metal oxide top layer as an interfacial promoter on a ZnIn2S4/TiO2 heterostructure photoanode for enhanced photoelectrochemical performance",

abstract = "We designed metal oxide coated ZnIn2S4/TiO2 (ZT) heterostructure photoanodes for enhanced photoelectrochemical performance via hydrothermal and dip-coating methods. The effects of thin metal oxide coating layers, such as TiO2, Al2O3, and SiO2, on the structural, morphological, optical, and photoelectrocatalytic activity of ZT photoanodes were investigated in detail. The metal oxide coating layers significantly enhanced the photoelectrochemical performance of ZT in the following order: SiO2/ZT>Al2O3/ZT>TiO2/ZT>ZT, all at pH 11.5 under simulated one sun illumination. A two-fold boost in the photocurrent density of ZT was recorded after a surface coating of a thin SiO2 layer among the studied metal oxide layers. The charge transfer resistance measured from the electrochemical impedance spectroscopy (EIS) analysis was less for the SiO2/ZT photoanode, indicating enhanced charge separation between the oxide surface layer and electrolyte. The enhanced photoelectrochemical performance due to the thin SiO2 coating was attributed to the improved interface properties that led to the effective charge transfer processes in the vicinity of the electrolyte.",

keywords = "Heterostructure photoanode, Hydrogen production, Metal oxide, TiO nanorod, ZnInS nanosheet",

author = "Mahadik, \{Mahadeo A.\} and Shinde, \{Pravin S.\} and Min Cho and Jang, \{Jum Suk\}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2016",

month = may,

day = "5",

doi = "10.1016/j.apcatb.2015.12.001",

language = "English",

volume = "184",

pages = "337--346",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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TY - JOUR

T1 - Metal oxide top layer as an interfacial promoter on a ZnIn2S4/TiO2 heterostructure photoanode for enhanced photoelectrochemical performance

AU - Mahadik, Mahadeo A.

AU - Shinde, Pravin S.

AU - Cho, Min

AU - Jang, Jum Suk

PY - 2016/5/5

Y1 - 2016/5/5

N2 - We designed metal oxide coated ZnIn2S4/TiO2 (ZT) heterostructure photoanodes for enhanced photoelectrochemical performance via hydrothermal and dip-coating methods. The effects of thin metal oxide coating layers, such as TiO2, Al2O3, and SiO2, on the structural, morphological, optical, and photoelectrocatalytic activity of ZT photoanodes were investigated in detail. The metal oxide coating layers significantly enhanced the photoelectrochemical performance of ZT in the following order: SiO2/ZT>Al2O3/ZT>TiO2/ZT>ZT, all at pH 11.5 under simulated one sun illumination. A two-fold boost in the photocurrent density of ZT was recorded after a surface coating of a thin SiO2 layer among the studied metal oxide layers. The charge transfer resistance measured from the electrochemical impedance spectroscopy (EIS) analysis was less for the SiO2/ZT photoanode, indicating enhanced charge separation between the oxide surface layer and electrolyte. The enhanced photoelectrochemical performance due to the thin SiO2 coating was attributed to the improved interface properties that led to the effective charge transfer processes in the vicinity of the electrolyte.

AB - We designed metal oxide coated ZnIn2S4/TiO2 (ZT) heterostructure photoanodes for enhanced photoelectrochemical performance via hydrothermal and dip-coating methods. The effects of thin metal oxide coating layers, such as TiO2, Al2O3, and SiO2, on the structural, morphological, optical, and photoelectrocatalytic activity of ZT photoanodes were investigated in detail. The metal oxide coating layers significantly enhanced the photoelectrochemical performance of ZT in the following order: SiO2/ZT>Al2O3/ZT>TiO2/ZT>ZT, all at pH 11.5 under simulated one sun illumination. A two-fold boost in the photocurrent density of ZT was recorded after a surface coating of a thin SiO2 layer among the studied metal oxide layers. The charge transfer resistance measured from the electrochemical impedance spectroscopy (EIS) analysis was less for the SiO2/ZT photoanode, indicating enhanced charge separation between the oxide surface layer and electrolyte. The enhanced photoelectrochemical performance due to the thin SiO2 coating was attributed to the improved interface properties that led to the effective charge transfer processes in the vicinity of the electrolyte.

KW - Heterostructure photoanode

KW - Hydrogen production

KW - Metal oxide

KW - TiO nanorod

KW - ZnInS nanosheet

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U2 - 10.1016/j.apcatb.2015.12.001

DO - 10.1016/j.apcatb.2015.12.001

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AN - SCOPUS:84949267008

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VL - 184

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JO - Applied Catalysis B: Environmental

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