Wednesday, March 26, 2014

Plasmonic Ag deposited TiO 2 nano-sheet film for enhanced photocatalytic hydrogen production by water splitting

TiO 2 nano-sheet film (TiO 2 NSF) was prepared by a hydrothermal method. Ag nanoparticles (NPs) were then deposited on the surface of TiO 2 NSF (Ag/TiO 2 NSF) under microwave-assisted chemical reduction. The prepared samples were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible (UV–vis) absorption spectroscopy, x-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and Raman scattering spectroscopy. The results revealed that the Ag NPs were well dispersed on the anatase/rutile mixed-phase TiO 2 nano-sheet surface with a metallic state. The visible light absorption and Raman scattering of TiO 2 were enhanced by Ag NPs based on its surface plasmon resonance effect. Besides, Ag NPs could also effectively restrain the recombination of photogenerated electrons and holes. Photocatalytic water splitting was conducted on the films to obtain hydrogen, and the experimen...

Enzhou Liu, Limin Kang, Yuhao Yang, Tao Sun, Xiaoyun Hu, Changjun Zhu, Hanchen Liu, Qiuping Wang, Xinghua Li and Jun Fan

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