QIN Yun1,2, YAO Wenhua1,2, LI Junjie1, ZHENG Kai1, ZHANG Xin1, WANG Wei1, WANG Jiaqiang1*
(1.Department of Applied Chemistry, Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan University, Kunming 650091, China;2.Departmeng of Resources and Environmental, Baoshan College, Baoshan 678000, China)
Abstract: Cobalt doped mesoporous silica was synthesized by using wild sugarcane-grass (Erianthus rockii) stems as template and used for the oxidation of cyclohexane. The catalyst was characterized by a combination of various physicochemical techniques, such as X-ray diffraction, N2 physisorption, diffuse reflectance UV-vis, FT-IR, Scanning electron microscopy. The XRD and N2 physisorption results indicated that the catalyst was a mesoporous structure material that cobalt oxides were highly dispersed on the surface of the catalyst. The UV-vis result indicated that the presence of both Co2+ and Co3+. The catalytic oxidation of cyclohexane results exhibited high product (cyclohexanone) selectivity (76.7%) and reasonable substrate conversion (71.0%). The recycling experiment indicated that the catalyst can be reused three times with catalytic activity changed little.
Key words: Cobalt doped mesoporous silica; biotemplate; wild sugarcane-grass stems; characterization; selective oxidation of cyclohexane; cyclohexanone
E-mail: jqwang@ynu.edu.cn
Journal of Molecular Catalysis, Vol. 26, Issue 3, 2012,216-224
