Manganese containing MCM-41: Synthesis, characterization and catalytic activity in the oxidation of ethylbenzene
作者： K.M. Parida , Saswati Soumya Dash
DOI: 10.1016/J.MOLCATA.2009.02.022
关键词: Aqueous solution 、 Catalysis 、 Temperature-programmed reduction 、 Inorganic chemistry 、 Chemistry 、 Powder diffraction 、 Ethylbenzene 、 Transition metal 、 Acetophenone 、 Manganese
摘要: Abstract A series of Mn–MCM-41 containing manganese from 2 to 10 wt.% were synthesized by impregnation method using aqueous manganese(II) acetate solution as the precursor. The samples characterized X-ray powder diffraction, nitrogen adsorption–desorption, FT-IR, TG–DTA, temperature programmed reduction, ESR, UV–vis diffuse reflectance spectra and solid state 29Si NMR. diffraction patterns showed that hexagonal mesopore structure is retained after Mn impregnation. FT-IR results indicated ions are incorporated into Si–O framework. TPR revealed presence highly dispersed species on surface support. ESR exhibited a well-resolved sextet centered at g = 2.0 indicating distorted octahedral symmetry Mn(II) in Mn/MCM-41. co-existence Mn2+ Mn3+ co-ordinated Si(IV) disordered tetrahedral environments, respectively. NMR higher degree condensation materials Mn/MCM-41 possessed significant catalytic activity for oxidation ethylbenzene TBHP oxidant under mild reaction conditions. 6/Mn–MCM-41 57.7% conversion, 82.2% 18% selectivity acetophenone benzaldehyde,
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elsevier.com参考文章(29)
George A. Olah, Friedel-Crafts and related reactions Interscience Publishers. ,(1963)
Suranjana Chaliha, Krishna Gopal Bhattacharyya, None, Wet oxidative method for removal of 2,4,6-trichlorophenol in water using Fe(III), Co(II), Ni(II) supported MCM41 catalysts. Journal of Hazardous Materials. ,vol. 150, pp. 728- 736 ,(2008) , 10.1016/J.JHAZMAT.2007.05.039
Mark E. Davis, Ordered porous materials for emerging applications Nature. ,vol. 417, pp. 813- 821 ,(2002) , 10.1038/NATURE00785
M. Selvaraj, P.K. Sinha, K. Lee, I. Ahn, A. Pandurangan, T.G. Lee, Synthesis and characterization of Mn–MCM-41and Zr–Mn-MCM-41 Microporous and Mesoporous Materials. ,vol. 78, pp. 139- 149 ,(2005) , 10.1016/J.MICROMESO.2004.10.004
Tingshun Jiang, Qian Zhao, Kangmin Chen, Yajing Tang, Longbao Yu, Hengbo Yin, Synthesis and characterization of Co (Ni or Cu)-MCM-41 mesoporous molecular sieves with different amount of metal obtained by using microwave irradiation method Applied Surface Science. ,vol. 254, pp. 2575- 2580 ,(2008) , 10.1016/J.APSUSC.2007.09.100
Xiaoping Dong, Weihua Shen, Yufang Zhu, Liangmin Xiong, Jinlou Gu, Jianlin Shi, Investigation on Mn-loaded mesoporous silica MCM-41 prepared via reducing KMnO4 with in situ surfactant Microporous and Mesoporous Materials. ,vol. 81, pp. 235- 240 ,(2005) , 10.1016/J.MICROMESO.2005.02.006
Virginie Escax, Marianne Impéror-Clerc, Dominique Bazin, Anne Davidson, Nanocasting, templated syntheses and structural studies of manganese oxide nanoparticles nucleated in the pores of ordered mesoporous silicas (SBA-15) Comptes Rendus Chimie. ,vol. 8, pp. 663- 677 ,(2005) , 10.1016/J.CRCI.2004.10.021
K.M. Parida, Dharitri Rath, Structural properties and catalytic oxidation of benzene to phenol over CuO-impregnated mesoporous silica Applied Catalysis A-general. ,vol. 321, pp. 101- 108 ,(2007) , 10.1016/J.APCATA.2007.01.054
Sami Habib, Franck Launay, Sébastien Laforge, Jean-Dominique Comparot, Anne-Catherine Faust, Yannick Millot, Thomas Onfroy, Valérie Montouillout, Patrick Magnoux, Jean-Louis Paillaud, Antoine Gédéon, High catalytic cracking activity of Al-MCM-41 type materials prepared from ZSM-5 zeolite crystals and fumed silica Applied Catalysis A-general. ,vol. 344, pp. 61- 69 ,(2008) , 10.1016/J.APCATA.2008.04.001
S. Vetrivel, A. Pandurangan, Co and Mn impregnated MCM-41: their applications to vapour phase oxidation of isopropylbenzene Journal of Molecular Catalysis A-chemical. ,vol. 227, pp. 269- 278 ,(2005) , 10.1016/J.MOLCATA.2004.10.036