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-419
Subject Photocatalytic degradation of rhodamine B dyes by TiO2 and Au nanoparticles supported on the PDMS sponge under UV and visible light irradiation
Authors Seong Youl Lee, Joon Heon Kim*
Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Korea
Abstract A porous PDMS (polydimethylsiloxane) sponge was simply fabricated by sugar cube templating method based on capillary suction of pre-PDMS polymer into sugar cubes. Then, TiO2 nanoparticles (NPs) and AuNPs were successfully deposited inside and outside of PDMS pores by physical adsorption and chemical reduction processes, respectively. Importantly, our simple method is an environment-friendly synthesis without the requirement of additional reducing, stabilizing and functionalizing agents. Characteristics of the PDMS-TiO2-Au sponge were evaluated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and UV-vis spectroscopy. The size of macropores varies from 91 to 900 μm and the TiO2 NPs predominantly exist in aggregate states, and the AuNPs with a size of 18-45 nm are formed. Photocatalytic activity was monitored by decoloration of rhodamine B solution under UV and visible light irradiation. The PDMS-TiO2-Au sponge shows higher photocatalytic activity than that of pristine TiO2 particles or AuNPs due to synergistic effects of adsorption, photocatalytic reaction and surface plasmon resonance.
E-mail seongyoul-lee@gist.ac.kr