Catalytic Properties Of Molybdenum Trioxide And Its Application
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- Category: Molybdenum knowledge
- Published on 11 August 2014
- Written by ling
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Molybdenum trioxide in the basic organic synthesis shows the unique catalytic properties of the catalyst as the mechanism under a specific wavelength of light is irradiated, the surface produced by the excitation electron - hole pairs, the oxidation occurs in an appropriate medium - reduction reaction to decompose the organic contaminants. MoO3 alcohol synthesis, and are widely used as partial oxidation catalysts, particularly in the selective oxidation and ammoxidation of hydrocarbons in order to MoO3 as a main component because of its high activity and selectivity of the catalyst which has been widely studied and Application .
Xiaoyi pinene in β- epoxypinane 2,10-epoxy into the process to molybdenum oxide as a catalyst, wherein Mo and t-butyl hydroperoxide to form a complex, thereby increasing the over-oxygen atom electrophilic ability, so β- pinene epoxidation reaction more likely to occur. Experiments showed that: 62% of TBHP, β- pinene / TBHP ratio of 1: 1,363K reaction temperature 2h, β- pinene conversion was 24.9%, the selectivity of the product was 91.4% of ethylene.
Wenyiyun who has better performance and more textured with a strong acid centers new carrier prepared by impregnation, Mo ZrO3 ions into the crystal lattice, forming a deformed tetragonal structure. Reduction performance surface acidity and catalyst carrier directly affect the three-way catalyst catalytic activity. Compared with the traditional three-way catalyst Pt / La2O3 / Al2O3, with MoO3 / ZrO3 for the preparation of carrier Pt / MoO3 / ZrO3 catalyst has better low-temperature activity, excellent performance and a wide three-way three-way windows, improved C3H8 in conversion efficiency enriched state.
MoO3 nanobelt has good catalytic performance than the material, mainly because:
(l) the small size of nanomaterials, the specific surface area is large, in a lot of surface atoms, and enhance the ability of the catalytic material adsorbed organic compounds, is conducive to the catalytic reaction;
(2) with a small nano-size, light-generated electrons from the crystal to the surface of the diffusion time is short, the recombination of electrons and holes is reduced, thereby improving the photocatalytic efficiency;
(3) due to the increased width of the band gap of MoO3 nanobelts, as compared with the optical raw material which has a more negative potential of the electrons, have a correspondingly greater reduction, the potential of photo-generated holes would have to correct its having greater oxidation resistance, leading to an increase nanobelts photocatalytic activity.
Therefore, MoO3 nanomaterials have potential applications in certain organic dyes pollution control.
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