123rd General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code MAT.P-393
Subject Fabrication and Applications of Noble Metal Coated Fe3O4@TiO2 Photocatalyst Nanoparticles with Enhanced Activity
Authors Kyeong-Mi Song, Seong-Hyun Jang, Jin-Seung Jung*
Department of Chemistry, Gangneung-Wonju National University, Korea
Abstract With a growing demand for clean and comfortable environment, purification technologies with high efficiency and low cost to reduce the pollutant contents of wastewater are urgently needed. TiO2 is considered to be one of the suitable material for photocatalysts due to its nontoxicity, biological inertness, chemical stability and low-cost. In addition magnetic Fe3O4 particles have been introduced to functionalize core–shell particles due to their unique separable feature that makes it possible to realize convenient recycling of novel metals. In this study, a facile and efficient approach for fabricating Ag or Ag,Au-coated Fe3O4@TiO2 particles with a good core-shell structure is demonstrated. As characterized by FE-SEM and XRD the as- synthesized Ag or Ag,Au-coated Fe3O4@TiO2 nanoparticles exhibit a narrow size distribution. The Ag or Ag,Au-coated Fe3O4@TiO2 photocatalyst exhibited high photocatalytic activity in the degradation of Rhodamine B (Rh.B) and Methyl orange (MO) under solar light and vis light. Finally, the photodynamic process of Ag or Ag,Au-coated Fe3O4@TiO2 rapidly generates reactive oxygen species (ROS). Therefore, the detection methods and generation mechanisms of the intrinsic reactive oxygen species (ROS), as for instance superoxide anion radical (•O2−), hydrogen peroxide (H2O2), singlet oxygen (1O2), and hydroxyl radical (•OH) in photocatalysis, were comprehensively surveyed. Reactive oxygen species (ROS) confirmed once more under presence of the scavengers.
E-mail zan0545@naver.com