V2O5/SBA-15 nanocatalysts for the selective synthesis of 2,3,5-trimethyl-1,4-benzoquinone at room temperature
| Autor: | Chinna Krishna Prasad Neeli, Venkata Siva Prasad Ganjala, Kamaraju Seetha Rama Rao, David Raju Burri, Venkateswarlu Vakati |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Diffuse reflectance infrared fourier transform 010405 organic chemistry Chemistry Analytical chemistry General Chemistry 010402 general chemistry 01 natural sciences Catalysis Nanomaterial-based catalyst 0104 chemical sciences Solvent Materials Chemistry Temperature-programmed reduction Mesoporous material Spectroscopy Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 40:679-686 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c5nj02399h |
| Popis: | A series of four V2O5/SBA-15 catalysts with the loadings of 5, 7.5, 10 and 12.5% (by weight) V2O5 have been prepared by the molecular designed dispersion (MDD) method and are characterized by N2-physisorption, low-angle and wide-angle XRD, transmission electron microscopy (TEM), Fourier Transform-Raman spectroscopy (FT-Raman), Ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis, DRS), temperature programmed reduction (TPR) and inductively coupled plasma-optical emission spectrometry (ICP-OES) techniques. Among V2O5/SBA-15 catalysts, the 10%V2O5/SBA-15 catalyst exhibited 99% 2,3,5-trimethylphenol (TMP) conversion with 95% 2,3,5-trimethyl-1,4-benzoquinone (TMBQ) yield when H2O2 (30% aqueous solution) and ethanol were used as green oxidant and green solvent respectively at room temperature. The remarkable activity of the 10%V2O5/SBA-15 catalyst is due to the isolated distribution of uniform sized nanovanadium species on the pore surfaces of the hexagonally ordered mesoporous SBA-15 silica support. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|