Fenton detemplation of ordered (meso)porous materials
This article describes a new methodology (Fenton detemplation), which consists of removing the template by chemical oxidation and develop the material’s porosity. The oxidizing agents are OH radicals, which are generated from H2O2 in the presence of catalytic amounts of Fe cations. This is known as Fenton’s chemistry, classically applied in wastewater treatment. It is innovative to implement this protocol in heterogeneous catalysis, and it displays many possibilities for the preparation of zeolites & mesoporous supports. The radicals are produced at low temperature <353 K, which is a key aspect for preserving the virgin structure of the material. The paper discusses two cases: beta zeolite and all-silica SBA-15, showing improved properties due to the better preservation of the structure, as a consequence of the mild conditions applied in detemplation and overcoming the problems associated to calcination.
I. Melián-Cabrera A. H. Osman E. R. H. van Eck A. P. M. Kentgens E.Polushkin F. Kapteijn J. A. Moulijn
Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, NL Dept. of Physical Chemistry, Solid-State NMR, IMM, Radboud University Nijmegen,Toernooiveld 1, 6525 Polymer Chemistry, MSC, University of Groningen, Nijenborgh 4, 9747 AG Groningen, NL CE, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, NL
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）