Electrospinning has become a universal and direct method for the preparation of nanofibers with rich porosity and large specific surface area. In this work, the Z-scheme heterojunction TiO₂@Ag@Cu₂O nanofibers photocatalyst was prepared via electrospinning and showed excellent visible light catalytic degradation performance with the obtained degradation efficiency of methylene blue as high as 99% within two hours. The main active compounds for the photocatalytic degradation of the dye methylene blue were superoxide radical (•O₂⁻) and hydroxyl radicals (•OH) as well as H⁺. Compared to pure TiO₂, following its combination with Cu₂O for visible light absorption, the recombination rate of the photogenerated electron-hole pairs was reduced. After Ag doping, due to the strong surface plasmon resonance absorption effect of Ag, a red shift occurs during the pyrolysis process, showing an outstanding contribution to the effective use of sunlight. Electrochemical test results showed that a Z-scheme hybrid structure was formed in the TiO₂@Ag@Cu₂O nanofibers. The photocurrent density of TiO₂@Ag@Cu₂O nanofibers was 3.78 times higher than that of TiO₂@Cu₂O nanofibers and 47.6 times higher than that of TiO₂ nanofibers. The Z-scheme heterojunction not only improved the visible light absorption efficiency, but also separated and transferred carriers, effectively preventing the recombination of photogenerated carriers. Therefore, we believe that TiO₂@Ag@Cu₂O nanofibers photocatalyst advances the development of photocatalysis technology and is promising for use in a broad range of applications in environmental remediation.

静电纺丝已成为制备具有丰富孔隙率和大比表面积的纳米纤维的通用且直接的方法。在这项工作中，通过静电纺丝制备了 Z 型异质结 TiO ₂ @Ag@Cu ₂ O 纳米纤维光催化剂，该光催化剂显示出优异的可见光催化降解性能，在两小时内获得的亚甲蓝降解效率高达 99%。光催化降解染料亚甲蓝的主要活性化合物是超氧自由基（•O ₂ ^-）和羟基自由基（•OH）以及H ⁺。与纯TiO ₂相比，与Cu ₂结合后O 对于可见光吸收，光生电子-空穴对的复合率降低。Ag掺杂后，由于Ag具有较强的表面等离子体共振吸收效应，热解过程中发生红移，对有效利用太阳光做出了突出贡献。电化学测试结果表明，在TiO ₂ @Ag@Cu ₂ O纳米纤维中形成了Z型杂化结构。TiO 2的光电流密度₂ @银@的Cu _2个ö纳米纤维高出3.78倍比的TiO ₂ @Cu _2个ö纳米纤维和47.6倍比的TiO更高₂纳米纤维。Z-scheme异质结不仅提高了可见光吸收效率，而且还分离和转移了载流子，有效地防止了光生载流子的复合。因此，我们认为TiO ₂ @Ag@Cu ₂ O 纳米纤维光催化剂推动了光催化技术的发展，并有望在环境修复中广泛应用。