TY - JOUR
T1 - Interface engineering of Co9S8/CdIn2S4 ohmic junction for efficient photocatalytic H2 evolution under visible light
AU - Li, Chunxue
AU - Zhao, Yidong
AU - Liu, Xiaoteng
AU - Huo, Pengwei
AU - Yan, Yongsheng
AU - Wang, Lili
AU - Liao, Guangfu
AU - Liu, Chunbo
N1 - We gratefully acknowledge the financial support of the National Natural Science Foundation of China (21805115, 21576112, and 21606114) and the Open Project Program of Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, China (2019009).
PY - 2021/10/15
Y1 - 2021/10/15
N2 - The design and development of high-performance photocatalysts from three aspects of simultaneous enhancement of light harvest, carrier migration rate, and redox reaction rate is still a great challenge. Herein, a novel Co9S8/CdIn2S4 ohmic junction with a robust internal electric field (IEF) is successfully prepared via hydrothermal and in situ synthesis methods and is used for effective photocatalytic H2 evolution (PHE). Under simulated visible light irradiation, the PHE rate of 5% Co9S8/CdIn2S4 can reach 1083.6 μmol h−1 g−1, which is 6.4 times higher than that of CdIn2S4 (170.5 μmol h−1 g−1). The enhanced PHE performance is mainly ascribed to the improved light harvest and carrier separation efficiency and fast surface H2 evolution kinetics. Moreover, Co9S8 nanotubes serve as promising Co-based cocatalysts that can evidently enhance PHE activity. Additionally, Co9S8/CdIn2S4 shows superior stability because the photogenerated carrier transfer path restrains the photocorrosion behavior. The photocatalytic mechanism is proposed based on experimental results and DFT calculations. This work offers new insights for the design and development of highly active photocatalysts from interface engineering.
AB - The design and development of high-performance photocatalysts from three aspects of simultaneous enhancement of light harvest, carrier migration rate, and redox reaction rate is still a great challenge. Herein, a novel Co9S8/CdIn2S4 ohmic junction with a robust internal electric field (IEF) is successfully prepared via hydrothermal and in situ synthesis methods and is used for effective photocatalytic H2 evolution (PHE). Under simulated visible light irradiation, the PHE rate of 5% Co9S8/CdIn2S4 can reach 1083.6 μmol h−1 g−1, which is 6.4 times higher than that of CdIn2S4 (170.5 μmol h−1 g−1). The enhanced PHE performance is mainly ascribed to the improved light harvest and carrier separation efficiency and fast surface H2 evolution kinetics. Moreover, Co9S8 nanotubes serve as promising Co-based cocatalysts that can evidently enhance PHE activity. Additionally, Co9S8/CdIn2S4 shows superior stability because the photogenerated carrier transfer path restrains the photocorrosion behavior. The photocatalytic mechanism is proposed based on experimental results and DFT calculations. This work offers new insights for the design and development of highly active photocatalysts from interface engineering.
KW - Co9S8/CdIn2S4
KW - Internal electric field
KW - Ohmic junction
KW - Photocatalytic H2 evolution
UR - http://www.scopus.com/inward/record.url?scp=85106956953&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2021.05.084
DO - 10.1016/j.jcis.2021.05.084
M3 - Article
AN - SCOPUS:85106956953
SN - 0021-9797
VL - 600
SP - 794
EP - 803
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -
