Journal of Materials Science

, Volume 44, Issue 24, pp 6512–6518 | Cite as

Direct synthesis of Cr-MCM-48-like large pore mesoporous silica

  • Lingzhi Wang
  • Lei Wang
  • Jinlong ZhangEmail author
Mesostructured Materials


Chromium-substituted MCM-48-like large pore mesoporous silica with average pore size up to 10 nm was directly synthesized by using P123 (EO20PO70EO20) as a template, n-butanol as an assistant, and chromic nitrate nonahydrate as a chromium source. The Cr species was doped by simply adjusting the pH of the synthesis system with ammonia from strong acid to nearly neutral after crystallization for 24 h. The Si/Cr ratios in the initial gel ranged from 10 to 80, and the actual weight percentage of Cr was analyzed by ICP. XRD pattern, high-resolution TEM, and N2 adsorption–desorption isotherm were employed to investigate the pore structure properties of these materials. The results showed that all the samples had Ia3d cubic structure and the pore channels were highly ordered. UV–vis, wide-angle XRD, and ESR spectra revealed that at lower Cr content (Si/Cr > 30), only Cr (VI) and Cr(V) species existed in the mesoporous framework, and at higher Cr content, Cr (III) species appeared.


Mesoporous Material Acetate Salt Chromic Nitrate Ia3d Symmetry Average Unit Cell Parameter 



This study has been supported by the Shanghai Natural Science Foundation (08ZR1406100), Morning Light Plan of Shanghai Education Development Foundation (2007CG040), Innovation Plan of Shanghai Municipality for Introduction of Foreign Technology (07XI-046), National High Technology Research and Development Program of China (2007AA05Z326), National Basic Research of China(973 Program 2004CB719500), National Nature Science Foundation of China (20773039), the Research Fund for the Doctoral Program of Higher Education(20070251006), and the Ministry of Science and Technology of China (2006AA06Z379, 2007AA05Z303, 2006DFA52710).


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Lab for Advanced Materials and Institute of Fine ChemicalsEast China University of Science and TechnologyShanghaiPeople’s Republic of China

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