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Preparation and Characterization of Ce-Si-SBA-15 Modified With Iron

K.J. Rose Philo, M. A. Rahana, S. Sugunan


Recently environmental concerns have driven the development of specialized catalysts to prevent polluting substances from being released into the environment. New technologies have improvised our understanding of catalytic functions as well as selectivity in order to save the energy and chemicals. Today, catalysis is the workhorse in the chemical industry with approximately >90% of the products produced in catalytic processes. In addition, life cannot exist without catalysis, as virtually all biochemical processes that sustain life are reliant on enzymes, nature’s own catalysts. Mixed metal oxides are multimetal multiphase oxides which typically contain one or more transition metal oxide and exhibit significant chemical and structural complexity. In recent years porous materials attract the attention of researchers and material scientists due to commercial interest in their applications in various fields especially in heterogeneous catalysis. Among the variety of catalysts, cerium oxide (CeO2) plays an important role in emerging technologies for environmental and energy-related applications. Also many efforts have been made to investigate the pore structure of SBA-15 and utilize SBA-15 as templates for preparing nano-structured materials. Incorporation of transition metals into the SBA-15 silica framework is still a challenge in the field of mesoporous material synthesis. Only few reports are available that has successfully demonstrated the modification. Mesoporous ceria catalyst was prepared by the soft template method using the neutral surfactant hexadecyl amine (HDA). It is mixed with 15 and 20% SBA-15 prepared by surfactant assisted method using Pluronic-123. The prepared samples were modified with 10% Fe. A detailed investigation of physico-chemical characterization of the catalytic systems was performed by techniques such as wide and low angle XRD, BET surface area by sorption studies of nitrogen gas, SEM, TEM, TG/DTA and FT-IR.

Keywords: hexadecyl amine, iron doping, mesoporous ceria, neutral surfactant, SBA-15

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