Solar-driven semiconductor photocatalysis shows great potential to solve growing energy and environmental crises. Electrospun TiO₂ nanofibers (NFs) attract attention due to their chemical stability, nontoxicity, cheapness, large specific surface area, and porous structures. The unique unwoven nanofibrous network facilitates mass transportation compared with bulk materials. Electrospun TiO₂ NFs are an ideal substrate for growing secondary nanostructures and constructing heterojunction photocatalysts. The hybrid heterojunctions show enhanced electron–hole separation, improved light absorption, effective activation of reactants, and therefore increased photocatalytic performance. Herein, the electrospinning principle and preparing tactics of electrospun TiO₂ fibrous nanostructures including solid, hollow, and core/shell NFs are first described. The construction strategies of electrospun TiO₂-based heterojunctions by loading electron or hole cocatalysts and hybridizing secondary semiconductors to engineer catalytic active sites and steer charge carrier separation are outlined. Dopant-induced increased light absorption and enhanced charge transfer of TiO₂ NFs are discussed. Further, the applications of electrospun TiO₂-based photocatalysts for solar-to-chemical conversion and environmental remediation are elucidated. Finally, the challenges and perspectives for the development of electrospun TiO₂-based photocatalysts are underlined, which deepen a systematic understanding of the design and fabrication of more efficient electrospun NFs in the future.

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电纺 TiO2 基光催化剂

太阳能驱动的半导体光催化在解决日益严重的能源和环境危机方面显示出巨大的潜力。电纺TiO ₂纳米纤维 (NFs) 因其化学稳定性、无毒、廉价、大比表面积和多孔结构而备受关注。与散装材料相比，独特的无纺纳米纤维网络有利于大规模运输。电纺TiO ₂ NFs 是生长二级纳米结构和构建异质结光催化剂的理想基材。杂化异质结显示出增强的电子 - 空穴分离，改善的光吸收，有效的反应物活化，因此提高了光催化性能。在此，静电纺TiO ₂的静电纺丝原理及制备策略首先描述了包括实心、空心和核/壳 NFs 的纤维纳米结构。概述了通过加载电子或空穴助催化剂和杂化二级半导体来设计催化活性位点和控制电荷载流子分离的电纺 TiO ₂基异质结的构建策略。讨论了掺杂剂引起的光吸收增加和 TiO ₂ NFs增强的电荷转移。此外，阐明了基于电纺 TiO ₂的光催化剂在太阳能到化学转化和环境修复中的应用。最后，电纺TiO ₂发展的挑战与展望基于光催化剂的下划线，加深了对未来更高效电纺纳米纤维的设计和制造的系统理解。