文章基本信息

标题：Complete Photocatalytic Mineralization of Microplastic on TiO 2 Nanoparticle Film
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作者：Iqra Nabi ; Aziz-Ur-Rahim Bacha ; Kejian Li 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：7
页码：1-40
DOI：10.1016/j.isci.2020.101326
语种：English
出版社：Elsevier
摘要：SummaryRecently, the environmental impacts of microplastics have received extensive attention owing to their accumulation in the environment. However, developing efficient technology for the control and purification of microplastics is still a big challenge. Herein, we investigated the photocatalytic degradation of typical microplastics such as polystyrene (PS) microspheres and polyethylene (PE) over TiO2nanoparticle films under UV light irradiation. TiO2nanoparticle film made with Triton X-100 showed complete mineralization (98.40%) of 400-nm PS in 12 h, while degradation for varying sizes of PS was also studied. PE degradation experiment presented a high photodegradation rate after 36 h. CO2was found as the main end product. The degradation mechanism and intermediates were studied byin situDRIFTS and HPPI-TOFMS, showing the generation of hydroxyl, carbonyl, and carbon-hydrogen groups during the photodegradation of PS. This study provides a green and cost-efficient strategy for the control of microplastics contamination in the environment.Graphical AbstractDisplay OmittedHighlights•Efficient degradation of microplastics under UV light by TiO2film•Triton-based TiO2film showed higher photocatalytic performance•The role of radical species during microplastics degradation was elucidated•Degradation mechanism and reaction intermediates were exploredCatalysis; Environmental Chemistry; Nanomaterials