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Preparation and photocatalytic activity characterization of activated carbon fiber–BiVO₄ composites

Zhang, Chencheng, Han, Pingfang, Lu, Xiaoping, Mao, Qinghui, Qu, Jiangang, Li, Ya
RSC advances 2018 v.8 no.43 pp. 24665-24672
Fourier transform infrared spectroscopy, activated carbon, carbon fibers, durability, kinetics, models, photocatalysis, photocatalysts, pollutants, reflectance, remediation, ultraviolet-visible spectroscopy
Herein, we describe the hydrothermal immobilization of BiVO₄ on activated carbon fibers (ACFs) and characterize the obtained composite by several instrumental techniques, using Reactive Black KN-B (RB5) as a model pollutant for photocatalytic performance evaluation and establishing the experimental conditions yielding maximal photocatalytic activity. The photocatalytic degradation of RB5 is well fitted by a first-order kinetic model, and the good cycling stability and durability of BiVO₄@ACFs highlight the potential applicability of the proposed composite. The enhanced photocatalytic activity of BiVO₄@ACFs compared to those of BiVO₄ and ACFs individually was mechanistically rationalized, and the suggested mechanism was verified by ultraviolet-visible spectroscopy, attenuated total reflectance Fourier-transform infrared spectroscopy, and RB5 degradation experiments. Thus, this work contributes to the development of BiVO₄@ACF composites as effective photocatalysts for environmental remediation applications.