123rd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation for Young Physical Chemists II
Room No. Room 305+306
Time THU 10:00-10:09
Code PHYS2.O-1
Subject Fe-oxide nanoparticles/SiO2 as a regenerative organic dye adsorbent
Authors Hyun Ook Seo*, Young Dok Kim1,*
Department of Chemical and Energy Engineering, Sangmyung University, Korea
1Department of Chemistry, Sungkyunkwan University, Korea
Abstract Mesoporous SiO2 particles containing Fe-oxide nanoparticles (~10 nm) were prepared by a temperature-regulated chemical vapor deposition and a post-annealing process. The performances of mesoporous SiO2 with and without Fe-oxide nanoparticles towards methylene blue (MB) removal from solution (MB concentration of 5 mg/l) were examined at room temperature under dark conditions. When the Fe-oxide nanoparticles were loaded on SiO2 adsorbents, the initial adsorption capability of the fresh SiO2 particles can be maintained after the regeneration process (400 oC-thermal annealing for 3 hrs). The results of FT-IR analyses of used bare SiO2 and Fe-oxide/SiO2 adsorbents before and after the regeneration process revealed that Fe-oxide nanoparticles were able to catalyze the thermal degradation of adsorbed MB molecules regenerating adsorption sites. The initial adsorption efficiency of SiO2 particles with Fe-oxide nanoparticles can be also fully recovered by a 100 oC-thermal annealing.
E-mail hyun.ook.seo@smu.ac.kr