6 research outputs found
Vapor-Phase Oxidation of Benzyl Alcohol Using Manganese Oxide Octahedral Molecular Sieves (OMS-2)
Vapor-phase selective oxidation of benzyl alcohol has been accomplished using cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) catalysts. A conversion of 92% and a selectivity to benzaldehyde of 99% were achieved using OMS-2. The role played by the oxidant in this system was probed by studying the reaction in the absence of oxidant. The natures of framework transformations occurring during the oxidation reaction were fully studied using temperature-programmed techniques, as well as in situ X-ray diffraction under different atmospheres
Vapor-Phase Oxidation of Benzyl Alcohol Using Manganese Oxide Octahedral Molecular Sieves (OMS-2)
Vapor-phase
selective oxidation of benzyl alcohol has been accomplished
using cryptomelane-type manganese oxide octahedral molecular sieve
(OMS-2) catalysts. A conversion of 92% and a selectivity to benzaldehyde
of 99% were achieved using OMS-2. The role played by the oxidant in
this system was probed by studying the reaction in the absence of
oxidant. The natures of framework transformations occurring during
the oxidation reaction were fully studied using temperature-programmed
techniques, as well as in situ X-ray diffraction under different atmospheres
Nonthermal Synthesis of Three-Dimensional Metal Oxide Structures under Continuous-Flow Conditions and Their Catalytic Applications
Continuous-flow synthesis of one-dimensional (1D) metal oxide nanostructures and/or their integration into hierarchical structures under nonthermal conditions is still a challenge. In this work, a nonthermal, continuous-flow approach for the preparation of γ-manganese oxide (γ-MnO<sub>2</sub>) and cerium oxide (CeO<sub>2</sub>) microspheres has been developed. By this technique, γ-MnO<sub>2</sub> materials with surface areas of 240, 98, and 87 m<sup>2</sup>/g and CeO<sub>2</sub> microspheres with a surface area of 1 m<sup>2</sup>/g have been fabricated successfully. Characterization of the materials was carried out using powder X-ray diffraction, infrared and inductively coupled plasma optical emission spectrometer (ICP/OES), nitrogen sorption, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The synthesized materials showed good catalytic activity in the oxidation of α-methyl styrene