Abstract
Hydrophilic Ti-MCM-41 was modified by alkylsilyl groups using n-octadecyltrichlorosilane as the precursor, yielding an amphiphilic molecular sieve denoted as OTS-Ti-MCM-41. The sample retained mesoporous structure and morphology, as confirmed by XRD, N2 adsorption–desorption, and SEM. The presence of surface alkylsilyl groups was confirmed by infrared spectroscopy. The amphiphilic OTS-Ti-MCM-41 located at the boundary between aqueous and organic phases acted as a phase-boundary catalyst for the photooxidation of dibenzothiophene (DBT) without the need of adding a co-solvent to drive liquid–liquid phase transfer. With H2O2 as the oxidant, the conversion of DBT on OTS-Ti-MCM-41 was up to 98% at 2 h, much higher than that on Ti-MCM-41. When air was used instead of H2O2 as the oxidant, the conversion of DBT on OTS-Ti-MCM-41 was up to 85% at 2 h.
Graphical abstracts
Hydrophilic Ti-MCM-41 was modified by alkylsil groups using n-octadecyltrichlorosilane as the precursor. The resulting OTS-Ti-MCM-41 sample located at the boundary between aqueous and organic phases acted as a phase-boundary catalyst for the photooxidation of dibenzothiophene (DBT).
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This research was supported by Grant 20276015 from National Natural Science Foundation of China and Grant 203364 from National Natural Science Foundation of HeBei province.
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Zhang, J., Zhao, D., Ma, Z. et al. Phase-Boundary Photocatalytic Oxidation of Dibenzothiophene Over Amphiphilic Ti-MCM-41 Molecular Sieve. Catal Lett 138, 111–115 (2010). https://doi.org/10.1007/s10562-010-0377-1
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DOI: https://doi.org/10.1007/s10562-010-0377-1