Herein, we report the enhanced photocatalytic activity of heterostructured CeO nanocatalysts interfaced with Cu, Co, Ni, Mn, and Fe metal oxides. The CeO catalysts exhibited an enhanced red shift in the visible-light response compared to CeO. This improved absorption range effectively suppressed electron (e)/hole (h) recombination by forming localized energy bands associated with defect oxygen vacancies ( ) induced by the M ions incorporated in CeO.
View Article and Find Full Text PDFThis study report on the synthesis of spinel CuFeO nanostructures by surfactant-assisted method. The catalysts were characterized by X-ray diffraction (XRD), laser Raman, transition electron microscope (TEM), scanning electron microscope (SEM), energy dispersive X-ray (EDX), hydrogen temperature programmed reduction (H-TPR), and Brunauer-Teller-Emmett-Teller (BET) surface area techniques. CuFeO was active for pinene oxidation using tertiary butyl hydroperoxide (TBHP) to pinene oxide, verbenol, and verbenone aroma oxygenates.
View Article and Find Full Text PDFJ Nanosci Nanotechnol
February 2014
The development of controlled synthesis protocols of nanostructured materials with tailored particle size and shape has been a significant research area in nanoscience and nanotechnology. Much innovative research efforts had been focused on finding suitable chemical reagents and synthetic methodologies that offer opportunities to produce the desired structure-function controlled nanomaterials. On the other hand, the reactor equipment for the synthesis of these tailored nanomaterials is of prime importance not only at laboratory-scale but also with view of up-scaling the synthetic processes into large-scale productions.
View Article and Find Full Text PDFThe promotional effect of nanosized Ru, Fe, Au, and Mn particles on VOHPO4 x 0.5H2O (VHP) catalytic properties was investigated in benzene hydroxylation reaction using hydrogen hydroperoxide (H2O2) as oxidant. Catalytic results indicated a profound effect of the nanoparticle dopants on VHP catalyst activity and products distribution.
View Article and Find Full Text PDFA porous layer open tubular (PLOT) silica gel column was used together with subcritical CO2 as the mobile phase to effect the group separation of polar oxygenated compounds. Aliphatic and aromatic compounds were shown to elute together. This group was followed by ethers and aldehydes, which were separated from compounds containing an alcohol functional group.
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