Two-dimensional (2D) MoS2 nanosheets vertically supported on TiO2/PVDF flexible fibers have been successfully synthesized by combining electrospinning with a low-temperature hydrothermal method without acid. The morphology of the 2D MoS2 nanosheets could be controlled by adjusting experimental parameters. The loaded 2D MoS2 nanosheets can not only broaden the light capture range of TiO2, but also greatly inhibit the recombination rate of photogenerated electron-holes pairs. Due to the synergistic effect between MoS2 and TiO2, the photocatalytic rate for levofloxacin hydrochloride is about 40 times higher than that of MoS2 only. Recycle experiments have proved the stability and reusability of TiO2/PVDF@2D MoS2 nanosheets. And the mechanism is investigated by quenching experiments. The results show that superoxide anion radical (•O2-), hydroxyl radical (•OH) and hole (h+) all have contributions to photocatalysis. This work widens the range of materials to synthesize the composites of 2D MoS2 nanosheets and provides a new and gentle method for preparing flexible large-scale heterostructures for environmental protection.

中文翻译：

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TiO2/PVDF柔性纤维上垂直支撑的二维MoS2纳米片的原位制备及其光催化性能

通过将静电纺丝与无酸低温水热法相结合，已成功合成了垂直支撑在 TiO2/PVDF 柔性纤维上的二维 (2D) MoS2 纳米片。2D MoS2 纳米片的形貌可以通过调整实验参数来控制。负载的二维 MoS2 纳米片不仅可以拓宽 TiO2 的光捕获范围，还可以极大地抑制光生电子 - 空穴对的复合率。由于 MoS2 和 TiO2 之间的协同作用，盐酸左氧氟沙星的光催化速率比只使用 MoS2 的光催化速率高约 40 倍。循环实验证明了TiO2/PVDF@2D MoS2纳米片的稳定性和可重复使用性。并通过淬火实验研究了机理。结果表明，超氧阴离子自由基（•O2-），羟基自由基（•OH）和空穴（h+）都对光催化有贡献。这项工作拓宽了合成二维二硫化钼纳米片复合材料的材料范围，并为制备用于环境保护的柔性大规模异质结构提供了一种新的、温和的方法。