Authors: Yasuro Ikuma Seiya Ogoe Masahiro Mitsugi Koichi Niwa Srinivasan Anandan Eiji Yamauchi Hiroo Tajiri Osami Sakata
Publish Date: 2015/05/08
Volume: 21, Issue: 9, Pages: 2495-2501
Abstract
The photocatalytic activity of a hydrogen fluoride HFtreated rutile TiO2001 surface for the decomposition reaction of linoleic acid was lower than that of an asreceived polished rutile TiO2001 surface The surfaces of asreceived TiO2001 and HFtreated TiO2001 were investigated using lowenergy electron diffraction LEED and surface Xray diffraction SXRD to elucidate differences in their photocatalytic activities The asreceived polished surface did not yield good LEED patterns which implied that the surface was not wellordered and was thus not examined using SXRD In contrast the HFtreated surface produced good LEED patterns with a 1 × 1 structure and was thus studied using SXRD The analysis of crystal truncation rods indicated that all atoms in the four layers of the surface moved toward the bulk and that the HFtreated surface was 101faceted with terraces On average the facet was found to be four layers deep The difference in the condition of the surface influences the photocatalytic activity of the surfaceThe authors gratefully acknowledge support from the Japan Synchrotron Radiation Research Institute Proposal Nos 2008B1393 2008B2208 2009B1445 and 2010A1258 for providing the BL13XU beamline facilities at SPring8 to conduct synchrotron experiments This work was financially supported in part by a GrantinAid for Scientific Research C No 23560807 from the Japan Society for the Promotion of Science JSPS
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