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Synthesis and characterization of nanostructured Ag on porous titania |
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| Authors: | Ming Wen Yanqiong LiJunmin Zhang Weiming GuanYuncang Li Cui’e WenPeter Hodgson |
| Institution: | a Institute for Technology Research and Innovation, Deakin University, Geelong, Victoria 3217, Australia b State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming, Yunnan 650106, China c IRIS, Institute IRIS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia |
| Abstract: | In this work, porous titania was prepared on bulk Ti by chemical oxidation, and then nanostructured silver (Ag) was deposited on titania surface by ion beam sputtering. After annealing treatment, Ag/TiO2 composites were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results indicated that a nano-porous titania layer with mean pore size of 150 nm and thickness of 1 μm was formed by chemical oxidation at 80 °C for 45 min. There were three Ag species (Ag (0), Ag (1+), and Ag (2+)) on composites surface after annealing treatment, and metallic Ag content achieved maximum value with annealing temperature of 500 °C in air. Ag showed high thermal stability being partly attributed to the inhibiting the diffusion of Ag by the underlying porous titania. |
| Keywords: | 61 46Df 68 47Jn |
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