Fe-doped WO3 nanoplates with excellent bifunctional performances: Gas sensing and visible light photocatalytic degradation

文献类型： 外文期刊

第一作者： Gao, Hongjia

作者： Gao, Hongjia;Zhu, Lianjie;Peng, Xue;Zhou, Xiaokun;Qiu, Mo

作者机构：

关键词： Fe doping WO3 nanoplates; Gas sensing; Photocatalytic degradation; Reaction mechanism; Dual functional nanomaterial

期刊名称：APPLIED SURFACE SCIENCE （ 影响因子：7.392； 五年影响因子：6.596 ）

ISSN： 0169-4332

年卷期： 2022 年 592 卷

页码：

收录情况： SCI

摘要： A series of Fe-doped WO3 nanoplates with various Fe contents (0.5%-5%) were prepared successfully by a facile hydrothermal method. The samples were characterized and their gas sensing and visible light photodegradation properties were investigated systematically. The corresponding reaction mechanisms were proposed based on the experimental results. The results show that the Fe-doped WO3 nanoplates exhibit enhanced gas sensing to acetone and visible light photodegradation to methyl blue (MB). Particularly, the gas sensing response value of the 2 %Fe-WO3 sensor is 2.8 times higher than that of the undoped WO3 sensor. Over a low dosage (10 mg) of the 0.5 %Fe-WO3 catalyst, the photocatalytic degradation rate of the 30 mg L-1 of MB solution reaches as high as 96.8% within a short time (60 min), which is 16.8% higher than that of the undoped WO3. The Fe doping significantly accelerates charge transfer rate of the sample, resulting in the remarkable enhancement in gas sensing response. The excellent photocatalytic activity of the 0.5 %Fe-WO3 may be attributed to the improved charge transfer/separation, the stronger visible light absorption and the lower band-edge potentials. Besides the main active species O-2(.), .OH (the secondary active species) also contributes to photodegradation of MB.

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