title: Synthesis of framework-substituted Fe-HMS and its catalytic performance for phenol hydroxylation.
abstract: The iron-incorporated mesoporous silica material Fe-HMS was successfully synthesized at ambient temperature by using dodecylamine as the template agent, and it was characterized by XRD, SEM, FT-IR, UV-vis, ESR and N(2) adsorption measurements. Its catalytic performance was studied for phenol hydroxylation with H(2)O(2) in a fixed-bed reactor. The results show that Fe(3+) ions have been successfully incorporated into the framework of HMS, and Fe-HMS has a uniform mesoporous structure with about 2.7 nm pore diameter. After Fe-HMS is calcined, most of the Fe(3+) ions remain in the tetrahedral coordinated framework, and only a small part of Fe species migrate to the extraframework. Fe-HMS has high catalytic activity and very high selectivity to dihydroxybenzene for the hydroxylation of phenol. Over the Fe-HMS catalyst, the product distribution of phenol hydroxylation is different from that over the microporous TS-1 zeolite. The solvents have great influence on the catalytic activity of Fe-HMS, and water is the best solvent.
authors: Lab for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People's Republic of China. College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, People's Republic of China.
authors: Hong
authors: H
authors: Liu
authors: Guanzhong
authors: G
authors: Lu
authors: Yanglong
authors: Y
authors: Guo
authors: Yun
authors: Y
authors: Guo
authors: Junsong
authors: J
authors: Wang