Abstract
Herein, in order to improve the photocatalytic performance of zinc oxide (ZnO), a visible light-responsive ZnO/activated carbon fiber (ACF) composite photocatalyst was prepared by immersion-hydrothermal method. The structural, micromorphology, formation procedure, optical properties and photocatalytic activity were researched in detail. The surfactant cetyltrimethylammonium bromide (CTAB) was introduced into the synthesis system. ZnO/ACF composites exhibited excellent photocatalytic activity under simulated visible light irradiation. Especially, when the amount of CTAB was 2.0 mM, the ZnO/ACF composite had the best adsorption performance and photocatalytic activity for the MO solution. The adsorption rate and degradation efficiency of the sample reached 95.6% and 99.4% after 5 h, respectively. We have proposed a possible photocatalytic machanism according to the trapping experiment. Moreover, ZnO/ACF still displayed excellent stability after 5 times repeated use.
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