Keywords Iodine ZnO Disinfection Oxygen vacancies Introduction Water puriﬁcation, which consists of eliminating contaminants and inactivating waterborne pathogens, is crucial for safe drinking water [1–4]. Conventional disinfection methods such as chlorination , ozone , UV radiation , and advanced ﬁltration technology can achieve effective sterilization or the separation of biomass from water [8–11]. However, the disinfection byproducts produced in chlorination or ozone processes are carcinogenic [12, 13]. In addition, advanced ﬁltration technology is expensive and not eco-friendly . Photocatalytic technology is regarded as a promising approach for removing pathogen microor- ganisms, since the report on photochemical sterilization by Matsunaga et al. . Zinc oxide (ZnO) as an antibacterial agent has received considerable attention due to its broad antibacterial activities under UV light, biocompatibility and cheapness low cost [13, 15, 16]. Unfortunately, ZnO, as a wide band gap (3.36 eV) photocatalyst, can only be excited by UV irradiation and has low quantum efﬁciency due to the fast recombination of photo-induced electron–hole pairs , which greatly limits its biomedical application under visible light or normal room light illumination. In order to extend the visible light absorption of ZnO and enhance the photocatalytic performance of ZnO under visible light,
Research on Chemical Intermediates – Springer Journals
Published: Jul 21, 2017
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