Chang Zhenjun, Liao Zhengzheng, Han Jie, Liu Qiang, Sun Xiaoling
College of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Polytex Engineering Group, Yangzhou 225000, China.
Nanomaterials (Basel). 2024 Dec 30;15(1):44. doi: 10.3390/nano15010044.
The design and preparation of advanced hybrid nanofibers with controllable microstructures will be interesting because of their potential high-efficiency applications in the environmental and energy domains. In this paper, a simple and efficient strategy was developed for preparing hybrid nanofibers of zinc oxide-molybdenum disulfide (ZnO-MoS) grown on polyimide (PI) nanofibers by combining electrospinning, a high-pressure hydrothermal process, and in situ growth. Unlike simple composite nanoparticles, the structure is shown in PI-ZnO to be like the skeleton of a tree for the growth of MoS "leaves" as macro-materials with controlled microstructures. The surface morphology, structure, composition, and photocatalytic properties of these structures were characterized using scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. The ultra high-volume fraction of MoS can be grown on the brush-shaped PI-ZnO. Decorating ZnO with nanosheets of MoS (a transition metal dichalcogenide with a relatively narrow band gap) is a promising way to increase the photocatalytic activity of ZnO. The hybrid nanofibers exhibited high photocatalytic properties, which decomposed about 92% of the methylene blue in 90 min under visible light irradiation. The combination of MoS and ZnO with more abundant surface-active sites significantly increases the spectral absorption range, promotes the separation and migration of carriers, and improves the photocatalytic characteristics.
具有可控微观结构的先进杂化纳米纤维的设计与制备因其在环境和能源领域潜在的高效应用而备受关注。本文通过结合静电纺丝、高压水热法和原位生长，开发了一种简单高效的策略来制备生长在聚酰亚胺（PI）纳米纤维上的氧化锌-二硫化钼（ZnO-MoS₂）杂化纳米纤维。与简单的复合纳米颗粒不同，PI-ZnO中的结构对于作为具有可控微观结构的宏观材料的MoS₂“叶片”的生长而言，类似于树的骨架。使用扫描电子显微镜、X射线衍射、X射线光电子能谱和紫外-可见光谱对这些结构的表面形貌、结构、组成和光催化性能进行了表征。超高体积分数的MoS₂可以生长在刷状的PI-ZnO上。用MoS₂纳米片（一种带隙相对较窄的过渡金属二硫属化物）修饰ZnO是提高ZnO光催化活性的一种有前途的方法。杂化纳米纤维表现出高光催化性能，在可见光照射下90分钟内可分解约92%的亚甲基蓝。MoS₂和ZnO结合更多丰富的表面活性位点，显著增加了光谱吸收范围，促进了载流子的分离和迁移，并改善了光催化特性。
