Titanium dioxide (TiO₂) is commonly used as a photocatalyst in the removal of organic pollutants. However, weaknesses of TiO₂ such as fast charge recombination and low visible light usage limit its industrial application. Furthermore, photocatalysts that are lost during the treatment of pollutants create the problem of secondary pollutants. Electrospun-based TiO₂ fiber is a promising alternative to immobilize TiO₂ and to improve its performance in photodegradation. Some strategies have been employed in fabricating the photocatalytic fibers by producing hollow fibers, porous fibers, composite TiO₂ with magnetic materials, graphene oxide, as well as doping TiO₂ with metal. The modification of TiO₂ can improve the absorption of TiO₂ to the visible light area, act as an electron acceptor, provide large surface area, and promote the phase transformation of TiO₂. The improvement of TiO₂ properties can enhance carrier transfer rate which reduces the recombination and promotes the generation of radicals that potentially degrade organic pollutants. The recyclability of fibers, calcination effect, photocatalytic reactors used, operation parameters involved in photodegradation as well as the commercialization potential of TiO₂ fibers are also discussed in this review.

中文翻译：

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电纺基TiO2纳米纤维用于有机污染物的光降解：综述

二氧化钛（TiO ₂）通常用作去除有机污染物的光催化剂。然而，TiO _2的缺点如快速的电荷复合和低的可见光使用限制了其工业应用。此外，在污染物处理期间损失的光催化剂产生了次级污染物的问题。电纺基TiO ₂纤维是固定化TiO ₂并提高其光降解性能的有前途的替代方法。通过生产中空纤维，多孔纤维，具有磁性材料的复合TiO ₂，氧化石墨烯以及掺杂TiO ₂，已在制造光催化纤维方面采用了一些策略。与金属。TiO ₂的改性可以改善TiO ₂对可见光区域的吸收，充当电子受体，提供大的表面积并促进TiO ₂的相变。TiO ₂性能的提高可以提高载流子的传输速率，从而降低了重组并促进了可能降解有机污染物的自由基的产生。本文还讨论了纤维的可回收性，煅烧效果，使用的光催化反应器，涉及光降解的操作参数以及TiO ₂纤维的商业化潜力。