Abstract
In order to solve the problems of easy recombination of electron–hole pairs, low solar energy utilization efficiency and difficult reuse of catalyst, a core–shell α–Fe2O3/Bi2MoO6@304SS heterojunction photocatalytic was synthesized and successfully immobilized on the 304 stainless steel (304SS) wire mesh. The result featured a flower–like particles assembled by a nanosheet catalyst uniformly distributed on the surface of the α–Fe2O3 shell, and showed high adsorption and visible–light photocatalytic activity towards ciprofloxacin (CIP). The CIP degradation efficiencies of 96 % and 92 % in the presence of visible light from a 40 W LED lamp and direct sunlight, respectively. Moreover, the photocatalytic mesh exhibited good structure stability and recycling performance. As determined, a built–in the electric field generated by the heterojunction reduced the recombination probability of electron–hole pairs, and significantly improved photocatalytic activity. Additionally, the possible electron migration mode in the heterojunction interface is proposed, the photocatalytic mechanism is elucidated, and possible degradation pathways of CIP are analyzed. With these unique features, the synthesis of photocatalytic mesh could be easily applied in water environment restoration and wastewater treatment systems.
Published Version
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