Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS2 in CdS/TiO2 Photocatalyst
Type
ArticleKAUST Department
Physical Science and Engineering (PSE) DivisionDate
2020-12-25Submitted Date
2020-11-26Permanent link to this record
http://hdl.handle.net/10754/666796
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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.Citation
Chen, W., Zhang, S., Wang, G., Huang, G., Yu, Z., Li, Y., & Tang, L. (2020). Rationally Designed CdS-Based Ternary Heterojunctions: A Case of 1T-MoS2 in CdS/TiO2 Photocatalyst. Nanomaterials, 11(1), 38. doi:10.3390/nano11010038Sponsors
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).Publisher
MDPI AGJournal
NanomaterialsPubMed ID
33375731Additional Links
https://www.mdpi.com/2079-4991/11/1/38ae974a485f413a2113503eed53cd6c53
10.3390/nano11010038
Scopus Count
Except where otherwise noted, this item's license is described as This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cite.
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