Titania-based electrospun nanofibrous materials: a new model for organic pollutants degradation
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Prospective Article
Titania-based electrospun nanofibrous materials: a new model for organic pollutants degradation Xiaohui Wu, Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China Yang Si, and Jianyong Yu, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China Bin Ding, Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China Address all correspondence to Prof. Bin Ding at [email protected] (Received 27 June 2018; accepted 12 July 2018)
Abstract Effective degradation of organic pollutants in wastewater is of great importance to the environment and human society. TiO2-based electrospun nanofibrous materials combining the properties of the large specific surface area, high aspect ratio, tunable compositions and structures, as well as easy to recycle, show great promise for the efficient removal of organic pollutants. In this Prospective paper, the recent progress in the degradation of organic water contaminants over visible-light-responsive TiO2-based nanofibrous materials is summarized, with emphasis on the strategies for improving the visible-light photocatalytic activity of TiO2-based nanofibrous materials. Finally, the current challenges and future outlook in this field are discussed.
Introduction Water pollution has become one of the biggest concerns confronting human society attributing to the ever-increasing development of the industry.[1] Organic pollutants such as textile dyes, phenols, antibiotics, and pesticides contributed a large part to the water pollution, causing water ecosystem unbalanced, even humans cancer, and mutation.[2–4] Conventional technologies such as adsorption, coagulation, chemical oxidation, and membrane separation, are applied for wastewater treatment. However, for adsorption and coagulation, they only remove pollutants from wastewater physically and cannot degrade pollutants into environmentally friendly compounds. And methodologies based on chemical and membrane techniques often suffer from high operating cost and secondary pollution.[5] Advanced oxidation processes, including photocatalysis, Fenton reaction, electrocatalysis, and ozonation, have emerged as a class of promising technologies for water purification due to their high degradation efficiency, easy handling, and good reusability. In particular, benefiting from the powerful ability to degrade a wide range of organic pollutants, photocatalysis has gotten a rapid development in water treatment.[6,7] TiO2, one of the most promising semiconductor photocatalysts, has obtained a wide application in the field of environmental management due to the intrinsic characteristics of good chemical inertness, low cost, and nontoxicity. Nevertheless, the limited visible light utilization and rapid recombination of photogenerated electrons and holes
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