期刊
JOURNAL OF POROUS MATERIALS
卷 26, 期 1, 页码 239-246出版社
SPRINGER
DOI: 10.1007/s10934-018-0642-z
关键词
Cr-MCM-41; Mesoporous silica; Catalyst; Toluene; Benzaldehyde
资金
- GGS Indraprastha University under FRGS scheme [2017/502]
In this study, toluene, a hazardous organic compound is being converted to benzaldehyde, which has wide applications in food and dye industries. In order to achieve better conversion efficiency, Cr incorporated MCM-41 systems were used. The incorporated systems were synthesized via in situ and wet impregnation methods. The obtained samples have been characterized by Fourier Transform Infra-red, Small angle X-ray Diffraction, Wide angle X-ray diffraction, Scanning Electron Microscopy and UV-Vis Spectroscopy. FTIR spectroscopy showed the bond characteristics in the prepared nanocomposites. X-ray diffraction (XRD) pattern and UV-Visible spectra showed the presence of Cr in MCM-41 framework. Nuclear Magnetic Resonance (NMR) confirmed the conversion of toluene to benzaldehyde. Pore volume and average pore diameter (BET-BJH analysis) was estimated using Surface Area Analyzer. 97.19% conversion of toluene to benzaldehyde was achieved in 18 h using Cr-MCM-41 synthesized via in situ method having Cr/Si ratio as 0.033 as compared to Chromium oxide nanoparticles which took 36 h for 85.2% conversion. The Cr-MCM-41 prepared by wet impregnation method also showed 95% toulene to benzaldehyde conversion, but the time taken by reaction was 36 h.
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