期刊
MATERIALS & DESIGN
卷 203, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2021.109630
关键词
Conjugated polymers; TiO2; Heterojunction; Photocatalysis; Surface wettability
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20201520300140]
- National Research Foundation (NRF) - Korea government (MSIT) (Regional Leading Research Center) [2020R1A5A8017671]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20201520300140] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Visible-light-driven composite photocatalysts were fabricated by chemically bound conjugated polymers (CPs) on a TiO2 surface to enhance photocatalytic efficiency and stability, as well as modify the hydrophilicity of the photocatalyst's surface for efficient reduction and oxidation reactions in water and organic solvents.
To overcome one of the disadvantages of ultraviolet absorbance of the wide-bandgap semiconductor TiO2, visible-light-driven composite photocatalysts were fabricated through chemically bound conjugated polymers (CPs) on a TiO2 surface. The interfacial chemical bonding between TiO2 and the CP could act as a linker for close proximity of two species for easy transfer of the excited electrons from the CP to the conduction band of TiO2, which significantly enhanced the photocatalytic efficiency in the visible range. The robust covalent bond between the CP and TiO2 led to increased stability during photocatalysis, enabling repeated use after simple washing. Moreover, the hydrophilic surface of the photocatalyst could be fabricated by modifying the CP on the photocatalyst's surface. Such a wettability change of the photocatalyst's surface allowed the photocatalyst to be used in reduction and oxidation reactions with high efficiency in both water and organic solvents. The combination of the visible light-harvesting capacity of the CP and the photocatalytic activity of TiO2 enabled versatile uses of the composite photocatalysts. (C) 2021 The Author(s). Published by Elsevier Ltd.
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