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A novel synthesis of oleophylic Fe2O3/polystyrene fibers by γ-Ray irradiation for the enhanced photocatalysis of 4-chlorophenol and 4-nitrophenol degradation

Wang, Ji-Chao, Li, Ying, Li, Heng, Cui, Zeng-Hui, Hou, Yuxia, Shi, Weina, Jiang, Kai, Qu, Lingbo, Zhang, Yu-Ping
Journal of hazardous materials 2019 v.379 pp. 120806
4-chlorophenol, adsorption, catalysts, ferric oxide, gamma radiation, hydrophobicity, hydroxyl radicals, irradiation, moieties, nanoparticles, p-nitrophenol, phenol, photocatalysis, pollutants, synergism, wastewater treatment
Photocatalytic degradation by efficient and easy recyclable semiconductor-catalysts is an ideal way to solve the environmental problem. A series of Fe2O3/Polystyrene (Fe2O3/PS) composite fibers with hydrophobic property were obtained by the electrospinning and γ-Ray irradiation methods. The γ-Ray irradiation treatment not only formed steady micro-nano construction of nanoparticles and fiber, but also reduced the hydroxyl group on Fe2O3 surface. The high photocatalytic efficiencies of Fe2O3/PS fiber were discovered with the high content of 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP), due to the synergetic effect of adsorption and degradation. The suitable adsorption capacity of Fe2O3/PS could promote the utilization of the generated hydroxyl radical(OH) to directly oxidize the adsorbed pollutant molecules. Additionally, the photocatalytic activities for 4-CP and 4-NP still reached 80% and 75% in the 6th cycling and the composite fiber exhibited the good recyclability, which has the application development prospect for wastewater treatment. The mechanism of 4-CP and 4-NP decomposition was verified. Hence, the gained results could provide some insights into phenol degradation over the multifunctional and efficient catalyst.