High reusability and durability of carbon-doped TiO2/carbon nanofibrous film as visible-light-driven photocatalyst
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The light response range, reusability, and durability of photocatalyst are the key issues for its practical application. To address these problems, the C-doped TiO2/carbon nanofibrous (CTCNF) film with incorporation of C-doped TiO2 nanoparticles into carbon nanofibers was prepared by electrospinning and calcination (pre-oxidation and carbonization). All the obtained CTCNF films exhibited a promising light absorption in ultraviolet–visible region. With optimization of carbonization temperature, the CTCNF film carbonized at 800 °C (CTCNF-800) showed a strongest light absorption. Consequently, the CTCNF-800 possessed a highest photocatalytic degradation efficiency of 94.2% for degradation of rhodamine B. In addition, the CTCNF-800 possessed excellent flexibility and deserved mechanical strength, and hence, the CTCNF-800 could be easily segregated from solution and recycled. Satisfyingly, its degradation efficiency still exceeded 92% after using for six cycles, implying that the CTCNF had excellent reusability and well stability. Besides, the degradation efficiency was over 90% after the CTCNF-800 kept in air without illumination for 1 year, indicating its outstanding durability. The CTCNF film photocatalyst demonstrates tremendous potential in practical application for purification of wastewater.
This study was supported by the Program for Zhejiang Provincial Natural Science Foundation of China (LZ16E020002); Science Foundation (17012144-Y); and Program of Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education (2017QN04) of Zhejiang Sci-Tech University.
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