Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 968, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.171947
Keywords
Photocatalytic hydrogen evolution; Photodegradation; Charge separation
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The MnxCd1_xIn2S4 solid solutions with tunable band edge positions were fabricated to enhance the separation efficiency of charge carriers in photocatalytic reactions. The Mn0.5Cd0.5In2S4/g-C3N4 nanocomposites exhibit superior performance and a type-II heterojunction photocatalytic mechanism is proposed to explain the transfer path of charge carriers.
The separation efficiency of photoinduced electron-hole pairs has an important function in photocatalytic reactions. In this work, the MnxCd1_xIn2S4 solid solutions with tunable band edge positions were fabricated by a facile hydrothermal route. Benefit from the regulation of band edge positions, the charge migration is regulated from type-I mechanism (MnIn2S4/g-C3N4 and CdIn2S4/g-C3N4) to type-II mechanism (Mn0.5Cd0.5In2S4/g-C3N4), which boosts the separation efficiency of charge carriers for photocatalytic reactions. The fabricated Mn0.5Cd0.5In2S4/g-C3N4 nanocomposites exhibit superior photocatalytic hydrogen production and tetracycline hydrochloride (TCH) photodegradation as compared to the g-C3N4 nanosheets, MnIn2S4, CdIn2S4, as well as the Mn0.5Cd0.5In2S4 solid solution. Based on the XPS test and the determination of band edge position, the type-II heterojunction photocatalytic mechanism is proposed to illustrate the transfer path of the charge carriers. This work offers a newfangled perspective for exploring an effective photocatalytic system.
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