121st General Meeting of the KCS

Type Poster Presentation
Area Physical Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code PHYS.P-241
Subject Fabrication of ZnO/Au/Pd Hybrid Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution under Visible Irradiation
Authors Ravindranadh Koutavarapu, Hyeon Jin Jung1, Seung Jun Lee1, Seung Heon Lee1, Myong Yong Choi1,*
Department of Chemistry, Gyeongsang National University, India
1Department of Chemistry, Gyeongsang National University, Korea
Abstract Simultaneous photocatalytic hydrogen (H2 production with degradation of organic pollutants has been a subject of passionate global research interest. Despite tremendous efforts, the development of cost effective, highly efficient, and more stable visible photocatalysts for H2 production remains a great challenge. In this study, ZnO/Au(5,10, and 15 wt%)/Pd hybrid nanocomposites were synthesized for the first time by a pulsed laser ablation in liquid and subsequent chemical reduction technique. The as-prepared catalysts were characterized by X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, UV-vis spectroscopy, and photoluminescence (PL). We examine the PL spectra of the as-prepared samples as a function of applied potential, pH, and in non-aqueous electrolyte. In addition, elemental analysis was performed by energy dispersive X-ray spectroscopy. We found that, ZnO/Au(5 wt%)/Pd nanocomposites exhibit a higher photocatalytic H2 evolution under visible light irradiation, and exhibit a better enhancement in the photocatalytic degradation of methylene blue (MB). The radical scavenger experiments proved that the superoxide (•O2-) radicals were the main reactive species for the degradation of MB.
E-mail ravindra.physicist@gmail.com