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首页> 外文期刊>Advanced Materials >Highly Reactive Multilayer-assembled Tio_2 Coating On Electros Pun Polymer Nanofibers
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Highly Reactive Multilayer-assembled Tio_2 Coating On Electros Pun Polymer Nanofibers

机译：电纺聚合物纳米纤维上的高反应性多层组装Tio_2涂层

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摘要

Growing concerns over the threat of chemical warfare agents and exposure to toxic industrial chemicals (TIC) have drawn much attention to the challenge of developing new methods for protection against and decomposition of toxic organic materials. Photocatalytic degradation using titanium dioxide (TiO_2) is one of the most widely studied methods, because it efficiently converts abundant solar energy into effective chemical energy, which can be applied to decompose harmful organic materials in air and water. UV illumination of TiO_2 excites electrons from the valence band to the conduction band, leaving holes in the valence band. The electrons then react with oxygen to produce superoxide anions, and the holes react with water to produce hydroxyl radicals. These two species are very reactive, and able to decompose a variety of organic toxic chemicals. However, the photocatalytic degradation of toxic chemicals, including chemical warfare agents, using TiO_2 is still challenging, in terms of high reaction efficiency with natural sunlight (or mild UV light), immobilization on the supporting materials, and sufficient activity without degradation of the supporting materials. For best photocatalytic activity, a high surface area, anatase crystalline structure of TiO_2 is required.
机译：人们对化学战剂的威胁以及对有毒工业化学物质（TIC）的暴露的关注日益增加，这引起了人们对开发新的保护和防止有毒有机材料分解的新方法所面临的挑战的关注。使用二氧化钛（TiO_2）进行光催化降解是研究最广泛的方法之一，因为它可以将大量的太阳能有效地转换为有效的化学能，可用于分解空气和水中的有害有机物质。 TiO_2的紫外线照射将电子从价带激发到导带，并在价带中留下空穴。然后，电子与氧反应生成超氧阴离子，而空穴与水反应生成羟基自由基。这两个物种具有很高的反应性，能够分解多种有机有毒化学物质。然而，就与天然阳光（或温和的紫外线）的高反应效率，固定在支撑材料上以及在不降解支撑物的情况下具有足够的活性而言，使用TiO_2光催化降解包括化学战剂在内的有毒化学物质仍然具有挑战性。材料。为了获得最佳的光催化活性，需要高表面积的TiO_2锐钛矿晶体结构。

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