TY - JOUR
T1 - Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS2 in CdS/TiO2 Photocatalyst
AU - Chen, Wenqian
AU - Zhang, Shaomei
AU - Wang, Ganyu
AU - Huang, Gang
AU - Yu, Zhichong
AU - Li, Yirui
AU - Tang, Liang
N1 - KAUST Repository Item: Exported on 2021-01-04
Acknowledgements: This research was funded by National Natural Science Foundation of China (Nos. 41573096, 21707064), Program for Changjiang Scholars and Innovative Research Team in University (No.IRT_17R71), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (QD2019005).
PY - 2020/12/25
Y1 - 2020/12/25
N2 - As promising heterojunction photocatalysts, the binary CdS-based heterojunctions were investigated extensively. In most of the reported CdS-based heterojunctions, however, electrons come from the semiconductor with wide band gap (e.g., TiO2) would limit the visible-light absorption of CdS and hence lower the performance. In this work, we introduced 1T-MoS2 to form a novel ternary heterojunction, namely CdS/1T-MoS2/TiO2, in which 1T-MoS2 has more positive conduction band than CdS and TiO2. The hydrogen evolution rate of CdS/1T-MoS2/TiO2 reaches 3.15 mmol g−1 h−1, which is approximately 12 and 35 times higher than that of pure CdS and CdS/TiO2 binary heterojunction under the same conditions, respectively. This performance enhancement could be attributed to the presence of 1T-MoS2 and a plausible mechanism is proposed based on photoelectrochemical characterizations. Our results illustrate that the performance of CdS-based heterojunctions for solar hydrogen evolution can be greatly improved by appropriate materials selection.
AB - As promising heterojunction photocatalysts, the binary CdS-based heterojunctions were investigated extensively. In most of the reported CdS-based heterojunctions, however, electrons come from the semiconductor with wide band gap (e.g., TiO2) would limit the visible-light absorption of CdS and hence lower the performance. In this work, we introduced 1T-MoS2 to form a novel ternary heterojunction, namely CdS/1T-MoS2/TiO2, in which 1T-MoS2 has more positive conduction band than CdS and TiO2. The hydrogen evolution rate of CdS/1T-MoS2/TiO2 reaches 3.15 mmol g−1 h−1, which is approximately 12 and 35 times higher than that of pure CdS and CdS/TiO2 binary heterojunction under the same conditions, respectively. This performance enhancement could be attributed to the presence of 1T-MoS2 and a plausible mechanism is proposed based on photoelectrochemical characterizations. Our results illustrate that the performance of CdS-based heterojunctions for solar hydrogen evolution can be greatly improved by appropriate materials selection.
UR - http://hdl.handle.net/10754/666796
UR - https://www.mdpi.com/2079-4991/11/1/38
U2 - 10.3390/nano11010038
DO - 10.3390/nano11010038
M3 - Article
C2 - 33375731
SN - 2079-4991
VL - 11
SP - 38
JO - Nanomaterials
JF - Nanomaterials
IS - 1
ER -