期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 48, 页码 24484-24500出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.05.019
关键词
p-n heterojunction; Cr (VI) reduction; H2 evolution; Antibacterial activity; Sensitizer
Developing a highly desirable multicomponent photocatalytic system through the synthesis of visible active B-rGO/ZnFe2O4 photocatalyst modified with polypyrrole has shown great promise in enhancing photocatalytic efficiency for environmental remediation and water splitting.
Developing a highly desirable multicomponent photocatalytic system for environmental remediation and water splitting is needed for current societal development. A visible active B-rGO/ZnFe2O4 photocatalyst was synthesized through the hydrothermal process, further magnify its electronic properties, the binary hybrid is modified with polypyrrole. The designed ternary hybrid utilizes the combining benefits of photo-sensitizer and interfacial charge transfer mechanism that ultimately boost its photocatalytic efficiency. The estab-lishment of interfacial p-n heterojunction via band-bending mechanism between B-rGO (BG) nanosheets and ZnFe2O4 (ZnF) nanoparticles was validated from photo-density in the opposite direction and upturned V-shaped Mott-Schottky plots. It was observed that 2BG/ ZnF@20PPY exhibits the best activity i.e., 100% reduction of 50 ppm Cr (VI) in 45 min and H2-production of 598 mmolh-1. Effective charge separation in 2BG/ZnF@20PPY is well sup -ported by PL, TRPL, EIS, transient-photocurrent, and donor density calculations. The strong contact among the constituents in 2BG/ZnF@20PPY is well-correlated with XPS and Raman characterization. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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