Nis/Pt Loaded on Electrospun Tio2 Nanofiber with Enhanced Visible-Light-Driven Photocatalytic Hydrogen Production
The porous TiO2 nanofiber has been successfully synthesized via facile electrospinning and thermal annealing processes. Furthermore, the intermediate layer of NiS and Pt nanoparticles can be sequentially deposited on the porous TiO2 nanofiber to form hierarchical core-shell TiO2/NiS/Pt nanofiber through wet-chemical and self-assembly processes. The as-prepared photocatalyst was investigated by FESEM, XRD, FETEM, XPS, PL, and UV-Vis DRS spectroscopy. Furthermore, the effect of the different annealing temperatures (TiO2 nanofiber), concentrations (NiS reaction precursors), and deposition times (Pt nanoparticles) for as-prepared samples on the photocatalytic properties was studied. Compared with the TiO2 nanofiber and TiO2/NiS nanofiber, TiO2/NiS/Pt nanofiber revealed remarkably photocatalytic activity for hydrogen evolution from water under visible light excitation. The significant enhancement in photocatalytic activity over the TiO2/NiS/Pt nanofiber could be attributed to enhanced visible light absorption and the separation of photogenerated electrons and holes. Furthermore, reusability experiments prove that TiO2/NiS/Pt nanofiber exhibits excellent stability for the long-term photocatalytic process. In addition, TiO2/NiS/Pt nanofiber can also use photocatalytic hydrogen production under different water bases (such as deionized water, reverse osmosis water, tap water, and seawater). Therefore, this study provides a promising strategy to develop a novel heterostructure photocatalyst for highly efficient energy conversion from light energy to hydrogen energy
Year of publication: |
[2022]
|
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Authors: | Chang, Yu-Cheng ; Zeng, Cheng-Jyun |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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