文献类型：期刊文献

英文题名：Highly Dispersed Copper Species within SBA-15 Introduced by the Hydrophobic Core of a Surfactant Micelle as a Carrier and Their Enhanced Catalytic Activity for Cyclohexane Oxidation

作者：Gu, Jinlou[1];Huang, Ying[1];Elangovan, S. P.[2];Li, Yongsheng[1];Zhao, Wenru[1];Toshio, Iijima[2];Yamazaki, Yasuo[2];Shi, Jianlin[1,3]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Nippon Chem Ind Co Ltd, Koto Ku, Tokyo 1368515, Japan;[3]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

年份：2011

卷号：115

期号：43

起止页码：21211

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY C

收录：;EI(收录号：20114414478537);WOS:【SCI-EXPANDED(收录号:WOS:000296172800051)】；

基金：This work was financially supported by Shanghai Pujiang Program (No. 09PJ1403000), Research Fund for the Doctoral Program of Higher Education (No. 20090074120009), Natural Science Foundation of China (No. 51072053, 21001043), the New Century Excellent Talents in University (No. NCET-10-0379), the Fundamental Research Funds for the Central Universities (No. WD0911012 and No. WK1013001), and the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0825).

语种：英文

外文关键词：Cyclohexane - Silica - Inductively coupled plasma - Atomic emission spectroscopy - Micelles - Catalytic oxidation - Surface active agents - X ray photoelectron spectroscopy - Electron spin resonance spectroscopy - Hydrophobicity - High resolution transmission electron microscopy - Catalyst activity - X ray diffraction

摘要：Highly dispersed copper species were successfully coated onto the inner surface of the rodlike mesoporous SBA-15 silica by a newly developed strategy. The hydrophobic core of the surfactant micelle in the as-synthesized SBA-15 was effectively employed as a carrier for the hydrophobic precursors of copper acetyl acetonate (Cu(acac)(2)) during hydrothermal treatment (HT) before surfactant removal, and the copper-derivated catalysis centers within SBA-15 were strategically generated on pyrolysis. Characterizations of the synthesized samples by a series of techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), electron paramagnetic resonance (EPR), temperature-programmed reduction (TPR), UV-vis, X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma atomic emission spectroscopy (ICP-AES) manifested that about 0.19-0.85 wt % copper was directly introduced and dispersed into the inner surface of the SBA-15 pore network. While there were few studies, if any, to utilize synthetic copper catalysts for the selective oxidation of cyclohexane oxidation, it was found that currently synthesized Cu-SBA-15 demonstrated very interesting catalytic properties for this industrially important reaction. Under the optimized reaction condition at an oxygen pressure of 1 MPa and a temperature of 120 degrees C for 7 h, the conversion of cyclohexane to the target products was higher than 11%; meanwhile, the total selectivity to cyclohexanol and cyclohexanone satisfactorily reached ca. 80%.