Yang, Daniel Park, Sang-Eun Lee, Joong-Kee Lee, Sang-Wha 2024-01-20T22:02:57Z 2024-01-20T22:02:57Z 2021-09-03 2009-01-15 0022-0248 https://pubs.kist.re.kr/handle/201004/132804 Different surface coverage of nanosized Au on the TiO2 matrix was simply fabricated in an ultrasound-driven cell by adjusting the loading volume of gold precursor. Non-annealed Au-TiO2 composites with low surface coverage of nanosized Au exhibited a significantly enhanced photocatalytic activity in comparison to pristine TiO2. However, a further increase of nanosized Au loading consequently led to a decrease of photocatalytic efficiency of Au-deposited TiO2, probably due to the reduction of available surface area for organic pollutant adsorption and light absorption. The X-ray photoelectron spectroscopy (XPS) analysis of Au-deposited TiO2 indicated the coexistence of metallic Au-0 and non-metallic Au species that might play a role as an electron scavenger. The reduction of photoluminescence (PL) intensity also indicated the efficient separation of electrons and holes even in Au-TiO2 composites without heat treatment. (C) 2008 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV GOLD CLUSTERS NANOPARTICLES IRRADIATION DEGRADATION ULTRASOUND SPHERES Sonochemical deposition of nanosized Au on titanium oxides with different surface coverage and their photocatalytic activity Article 10.1016/j.jcrysgro.2008.09.058 1 JOURNAL OF CRYSTAL GROWTH, v.311, no.3, pp.508 - 511 JOURNAL OF CRYSTAL GROWTH 311 3 508 511 scie scopus 000264161700020 2-s2.0-59749092748 Crystallography Materials Science, Multidisciplinary Physics, Applied Crystallography Materials Science Physics Article; Proceedings Paper GOLD CLUSTERS NANOPARTICLES IRRADIATION DEGRADATION ULTRASOUND SPHERES Nanostructures Growth from solutions Metals Titanium compounds Photocatalyst