掺杂 PdS-ZnS 的电纺聚合物纳米纤维作为有效的氢气转化光催化剂

Hydrogen Pub Date : 2024-07-07 DOI:10.3390/hydrogen5030023
Gopal Panthi, Arun Gyawali
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摘要

通过电纺丝技术制备了掺杂 PdS-ZnS 纳米粒子的聚(醋酸乙烯)纳米纤维(PdS-ZnS/PVAc 纳米纤维)。PdS-ZnS 纳米粒子是在聚醋酸乙烯酯/醋酸锌/醋酸钯溶液中加入 (NH4)2S 溶液原位合成的。通过对形成的胶体溶液进行电纺丝,形成了含有均匀分布的 PdS-ZnS 纳米粒子的聚醋酸乙烯酯纳米纤维。制备的样品通过场发射扫描电子显微镜、X 射线衍射、透射电子显微镜和傅立叶变换红外光谱进行了表征。在光催化活性研究中,与 ZnS/PVAc 纳米纤维相比,PdS-ZnS/PVAc 纳米纤维在太阳光照射下的水光分离性能明显提高。这种性能的提高归因于异质结构 PdS-ZnS 纳米粒子的协同效应,它可以改善光生电荷迁移和太阳光吸收。
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PdS-ZnS-Doped Electrospun Polymer Nanofibers as Effective Photocatalyst for Hydrogen Evolution
Poly(vinyl acetate) nanofibers doped with PdS-ZnS nanoparticles (PdS-ZnS/PVAc nanofibers) were fabricated via an electrospinning technique. PdS-ZnS nanoparticles were in situ synthesized by adding (NH4)2S solution to poly(vinyl acetate)/zinc acetate/palladium acetate solution. Electrospinning of the formed colloidal solution led to the formation of poly(vinyl acetate) nanofibers containing uniformly distributed PdS-ZnS nanoparticles. The prepared samples were characterized by field emission scanning electron microscopy, X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. In photocatalytic activity investigation, the PdS-ZnS/PVAc nanofibers showed remarkably enhanced performance towards water photosplitting under solar irradiation compared to the ZnS/PVAc nanofibers. This enhanced performance is attributed to the synergistic effects of heterostructured PdS-ZnS nanoparticles, which can improve photogenerated charge migration and solar light absorption.
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