Substantially enhanced photoelectrochemical performance of TiO2 nanorods/CdS nanocrystals heterojunction photoanode decorated with MoS2 nanosheets

Swetha S.M. Bhat; Sachin A. Pawar; Darshna Potphode; Chang Ki Moon; Jun Min Suh; Changyeon Kim; Seokhoon Choi; Dipali S. Patil; Jang Joo Kim; Jae Cheol Shin; Ho Won Jang

doi:10.1016/j.apcatb.2019.118102

Substantially enhanced photoelectrochemical performance of TiO₂ nanorods/CdS nanocrystals heterojunction photoanode decorated with MoS₂ nanosheets

Swetha S.M. Bhat, Sachin A. Pawar, Darshna Potphode, Chang Ki Moon, Jun Min Suh, Changyeon Kim, Seokhoon Choi, Dipali S. Patil, Jang Joo Kim, Jae Cheol Shin, Ho Won Jang

Department of Electronics & Electrical Engineering

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

118 Scopus citations

Abstract

Two-dimensional (2D) MoS₂ nanosheets (NSs) modified 1D TiO₂ nanorods/0D CdS nanocrystals (NCs) heterojunction has been fabricated by all solution process as a potential anode for photoelectrochemical (PEC) water splitting applications. This heterojunction photoanode shows high photocurrent density of 3.25 mA/cm² at 0.9 V vs. RHE (0 V vs. Ag/AgCl) compared to the pristine TiO₂/CdS photoanode. The influence of MoS₂ NSs on PEC performance of TiO₂/CdS/MoS₂ heterojunction has been systematically investigated. We demonstrate that MoS₂ NSs transfer holes from CdS and facilitate further charge separation in TiO₂/CdS. Time resolved photoluminescence measurement reveals increase in photoluminescence lifetime due to the presence of MoS₂ NSs in TiO₂/CdS/MoS₂ resulting in enhanced PEC activity. This work suggests that 1D TiO₂/0D CdS/2D MoS₂ heterojunction prototype is an interesting system where MoS₂ NSs can be utilized to improve charge separation in photoanodes. This study would pave the way towards designing new heterojunction functional materials for efficient PEC applications.

Original language	English
Article number	118102
Journal	Applied Catalysis B: Environmental
Volume	259
DOIs	https://doi.org/10.1016/j.apcatb.2019.118102
State	Published - 15 Dec 2019

Keywords

CdS
Heterojunction
MoS
Photoanode
TiO

UN SDGs

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

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10.1016/j.apcatb.2019.118102

Cite this

Bhat, S. S. M., Pawar, S. A., Potphode, D., Moon, C. K., Suh, J. M., Kim, C., Choi, S., Patil, D. S., Kim, J. J., Shin, J. C., & Jang, H. W. (2019). Substantially enhanced photoelectrochemical performance of TiO₂ nanorods/CdS nanocrystals heterojunction photoanode decorated with MoS₂ nanosheets. Applied Catalysis B: Environmental, 259, Article 118102. https://doi.org/10.1016/j.apcatb.2019.118102

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title = "Substantially enhanced photoelectrochemical performance of TiO2 nanorods/CdS nanocrystals heterojunction photoanode decorated with MoS2 nanosheets",

abstract = "Two-dimensional (2D) MoS2 nanosheets (NSs) modified 1D TiO2 nanorods/0D CdS nanocrystals (NCs) heterojunction has been fabricated by all solution process as a potential anode for photoelectrochemical (PEC) water splitting applications. This heterojunction photoanode shows high photocurrent density of 3.25 mA/cm2 at 0.9 V vs. RHE (0 V vs. Ag/AgCl) compared to the pristine TiO2/CdS photoanode. The influence of MoS2 NSs on PEC performance of TiO2/CdS/MoS2 heterojunction has been systematically investigated. We demonstrate that MoS2 NSs transfer holes from CdS and facilitate further charge separation in TiO2/CdS. Time resolved photoluminescence measurement reveals increase in photoluminescence lifetime due to the presence of MoS2 NSs in TiO2/CdS/MoS2 resulting in enhanced PEC activity. This work suggests that 1D TiO2/0D CdS/2D MoS2 heterojunction prototype is an interesting system where MoS2 NSs can be utilized to improve charge separation in photoanodes. This study would pave the way towards designing new heterojunction functional materials for efficient PEC applications.",

keywords = "CdS, Heterojunction, MoS, Photoanode, TiO",

author = "Bhat, {Swetha S.M.} and Pawar, {Sachin A.} and Darshna Potphode and Moon, {Chang Ki} and Suh, {Jun Min} and Changyeon Kim and Seokhoon Choi and Patil, {Dipali S.} and Kim, {Jang Joo} and Shin, {Jae Cheol} and Jang, {Ho Won}",

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AU - Pawar, Sachin A.

AU - Potphode, Darshna

AU - Moon, Chang Ki

AU - Suh, Jun Min

AU - Kim, Changyeon

AU - Choi, Seokhoon

AU - Patil, Dipali S.

AU - Kim, Jang Joo

AU - Shin, Jae Cheol

AU - Jang, Ho Won

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AB - Two-dimensional (2D) MoS2 nanosheets (NSs) modified 1D TiO2 nanorods/0D CdS nanocrystals (NCs) heterojunction has been fabricated by all solution process as a potential anode for photoelectrochemical (PEC) water splitting applications. This heterojunction photoanode shows high photocurrent density of 3.25 mA/cm2 at 0.9 V vs. RHE (0 V vs. Ag/AgCl) compared to the pristine TiO2/CdS photoanode. The influence of MoS2 NSs on PEC performance of TiO2/CdS/MoS2 heterojunction has been systematically investigated. We demonstrate that MoS2 NSs transfer holes from CdS and facilitate further charge separation in TiO2/CdS. Time resolved photoluminescence measurement reveals increase in photoluminescence lifetime due to the presence of MoS2 NSs in TiO2/CdS/MoS2 resulting in enhanced PEC activity. This work suggests that 1D TiO2/0D CdS/2D MoS2 heterojunction prototype is an interesting system where MoS2 NSs can be utilized to improve charge separation in photoanodes. This study would pave the way towards designing new heterojunction functional materials for efficient PEC applications.

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