Graphene and g-C3N4 Nanosheets Cowrapped Elemental alpha-Sulfur As a Novel Metal-Free Heterojunction Photocatalyst for Bacterial Inactivation under Visible-Light
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AbstractA new class of metal-free heterojunction photocatalysts was prepared by wrapping reduced graphene oxide (RGO) and g-C3N4 (CN) sheets on crystals of cyclooctasulfur (alpha-S-8). Two distinctive structures were fabricated by wrapping RGO and CN sheets in different orders. The first was RGO sheets sandwiched in heterojunction of CN sheets and alpha-S-8 (i.e., CNRGOS(8)), while the second structure was the other way around (i.e., RGOCNS(8)). Both structures exhibited antibacterial activity under visible-light irradiation. CNRGOS(8) showed stronger bacterial inactivation than RGOCNS(8) in aerobic conditions. However, RGOCNS(8) was more active than CNRGOS(8) under anaerobic condition. A possible mechanism was proposed to explain the differences between photocatalytic oxidative inactivation and reductive inactivation. As a proof-of-concept, this work could offer new inroads into exploration and utilization of graphene sheets and g-C3N4 sheets cowrapped nanocomposites for environmental applications.
All Author(s) ListWANG Wanjun, YU Jimmy C, XIA Dehua, WONG Po Keung, LI Yecheng
Journal nameEnvironmental Science and Technology
Volume Number47
Issue Number15
PublisherAmerican Chemical Society
Pages8724 - 8732
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesEngineering; Engineering, Environmental; ENGINEERING, ENVIRONMENTAL; Environmental Sciences; ENVIRONMENTAL SCIENCES; Environmental Sciences & Ecology

Last updated on 2020-08-08 at 00:16