Journal
APPLIED SURFACE SCIENCE
Volume 293, Issue -, Pages 345-351Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2013.12.165
Keywords
Layered double hydroxides; Pt; Intercalation; Photocatalysis; Charge separation
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Funding
- National Natural Science Foundation of China [51238002, 51272099, 51268047]
- Cultivating Program for Young Scientists of Jiangxi Province of China [20122BCB23014]
- Jiangxi Provincial Science & Technology Pillar Program [2010BSA20700]
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NanoPt intercalated Zn-Ti layered double hydroxides (LDHs) have been synthesized by ionic exchange and photochemical reduction method from Zn-Ti LDHs in H2PtCl6 solution. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), N-2 adsorption at 77K, UV-vis analysis and the electrochemical impedance were adopted to investigate the structure, surface, micromorphology, photoresponsive and electrochemical properties of the as-synthesized samples. The combination of Zn-Ti-LDHs and Pt introduces some properties of Pt into photocatalysis such as excellent conductivity and controllability. Remarkable 17-fold enhancement in the degradation of rhodamine B (RhB) reaction was observed on as-prepared Pt/Zn-Ti LDHs compared with pure Zn-Ti LDHs under simulated sunlight irradiation. The enhanced photocatalytic activity could be attributed to high specific surface (111.46 m(2)/g), extended photoresponding range, the negative shift in the flat-band potentials and the high migration efficiency of photoinduced electrons, which may suppress the charge recombination effectively. (C) 2014 Elsevier B.V. All rights reserved.
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