Electrospinning is an effective way to fabricate ultralong nanotubes with a large surface area. However, the nanotubes synthesized through this way suffer from difficult controlling of structural parameters. A facile strategy for constructing highly controllable Pt@ZnO nanoparticles (NPs) drive TiO₂ nanotubes (NTs) (Pt@ZnO-TiO₂ NTs) was developed in this work. First, the polystyrene electrospun nanofibers (~490 nm) containing Pt@zeolitic imidazolate framework-8 (ZIF-8) was fabricated as a self-sacrificial template and then was decorated by a thinner tetrabutyl orthotitanate layer through soaking. After annealing, the Pt@ZnO NPs were obtained due to the decomposition of Pt@ZIF-8 during calcination. The involving of ZIF-8 can effectively prevent the aggregation of Pt during heat treatment (~3 nm, monodispersed), and thus highly improves its catalyst property. When Pt@ZnO-TiO₂ NTs were evaluated as a sensing material for toluene detection, the obtained sensors exhibited an enhanced sensing response (11.1 to 1 ppm toluene), faster response/recovery times (7.5 and 20.1 s) and a lower detection limit (23 parts per billion) during dynamic measurement, when compared to the pristine TiO₂ and directly mixed Pt-TiO₂ NTs. This was mainly attributed to the improved oxygen vacancy concentration in the NT composite and resistance modulation effect induced by the unique NT structure, as well as the well-dispersed and small-sized Pt catalyst.

电纺丝是制造具有大表面积的超长纳米管的有效方法。然而，通过这种方式合成的纳米管难以控制结构参数。构造高度可控的Pt @ ZnO纳米颗粒（NPs）驱动TiO ₂纳米管（NTs）（Pt @ ZnO-TiO ₂NTs）是在这项工作中开发的。首先，将包含Pt @沸石咪唑酸酯骨架8（ZIF-8）的聚苯乙烯电纺纳米纤维（〜490 nm）制成自牺牲模板，然后通过浸泡用更薄的原钛酸四丁酯层装饰。退火后，由于煅烧过程中Pt @ ZIF-8的分解，获得了Pt @ ZnO NP。ZIF-8的参与可以有效地防止热处理过程中Pt的聚集（〜3 nm，单分散），因此可以大大提高其催化性能。当Pt @ ZnO-TiO _2时NTs被评估为用于甲苯检测的传感材料，所获得的传感器在检测过程中表现出增强的传感响应（11.1至1 ppm甲苯），更快的响应/恢复时间（7.5和20.1 s）和更低的检测限（十亿分之23）。动态测量，与原始TiO ₂和直接混合的Pt-TiO ₂ NTs相比。这主要归因于NT复合材料中氧空位浓度的改善和独特的NT结构以及分散良好的小型Pt催化剂引起的电阻调节作用。