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( Duangdao Channei ),( Sukon Phanichphant ),( Auppatham Nakaruk ),( Pramod Koshy ),( Charles C. Sorrell ) 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Photocatalysis as a green and sustainable technology has received increasing attention during the past decades. Based on the fundamentals of photocatalysis and surface chemistry of CeO<sub>2</sub> materials, we herein discuss a very facile and reproducible method for the synthesis of Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/CeO<sub>2</sub> with a control of core-shell structure. The first attempt in producing Fe<sub>3</sub>O<sub>4</sub>/CeO<sub>2</sub> magnetic photocatalyst involved the direct deposition of CeO<sub>2</sub> onto the surface of magnetic Fe<sub>3</sub>O<sub>4</sub> particles. However a direct contact of CeO<sub>2</sub> onto the surface of magnetic Fe<sub>3</sub>O<sub>4</sub> particles presented unfavorable heterojunction, thus the SiO<sub>2</sub> barrier layer between magnetic Fe<sub>3</sub>O<sub>4</sub> and CeO<sub>2</sub> was prepared as a core-shell structure to reduce the negative effect. Fe<sub>3</sub>O<sub>4</sub>/SiO<sub>2</sub>/CeO<sub>2</sub> core-shell magnetic nanoparticles was recovered in the consecutive cycles of use by external magnetic field. The material showed good stability with regards to photocatalytic performance for three cycles of use.