119th General Meeting of the KCS

Type Poster Presentation
Area 물리화학
Room No. 포스터발표장
Time 4월 20일 (목요일) 11:00~12:30
Code PHYS.P-14
Subject Cu2O/CuO Composites Designed for Wastewater Treatment
Authors 최다연, 장두전*
서울대학교 화학부, Korea
Abstract Contamination of water is predicted to become a major threat to the ecosystem. To purify the wastewater, many researchers have paid attention to develop catalysts having efficient performances with unique structures. One effective way is to fabricate well-designed structure. Especially 3-D structures with well-designed structures have been extensively explored to enhance their catalytic performances. Here, diverse morphologies of CuO/Cu2O composites having good catalytic properties for the reduction of 4-nitrophenol in the presence of NaBH4 have been controlled facilely by adjusting the concentrations of NaOH during the wet etching of Cu2O cubes. The catalytic activity of CuO/Cu2O composites is found to depend highly on their morphologies; in particular, CuO/Cu2O composites prepared at 0.3 M of NaOH(aq) have shown the strongest catalytic performances. Regarding to the highest catalytic activity of the composites with cavities surrounded by CuO flakes, confinement effect is considered to expedite electron transfer from BH4- to the dye molecule enormously by reducing the activation energy largely; the energetically favorable formation of the activated complex at the inner walls of a CuO box lowers the energy barrier substantially. In brief, CuO/Cu2O composites having high catalytic activity have been prepared facilely via a controlled oxidation process of Cu2O cubes, and they may be applied to treat wastewater in an inexpensive way without employing commonly used noble-metal catalysts.
E-mail dayeon@snu.ac.kr