Rapid synthesis of cryptomelane-type manganese oxide under ultrasonic process |
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| Authors: | Ming Sun Lin Yu Fei Ye Guiqiang Diao Qian Yu Yuying Zheng Jean-Yves Piquemal |
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| Affiliation: | 1. Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, PR China;2. ITODYS, UMR CNRS 7086, Université Paris Diderot-Paris 7, Bâtiment Lavoisier, 15 rue Jean de Baïf, 75205 Paris Cedex 13, France;1. College of Environmental Sciences, Sichuan Agricultural University, Wenjiang 611130, China;2. College of Resources, Sichuan Agricultural University, Wenjiang 611130, China;1. CEA,DEN,DTEC,SGCS, F-30207 Bagnols-sur-Cèze, France;2. OCM, ZI Quai Jean Jaurès, 197 Avenue Marie Curie, 07800 La Voulte-sur-Rhône, France;1. Boreskov Institute of Catalysis SB RAS, 630090, Novosibirsk, Russia;2. Novosibirsk State University, 630090, Novosibirsk, Russia;1. Department of Chemical and Materials Engineering, National Central University, Chung-Li 32001 Taiwan;2. Department of Chemistry, Tomsk State University, 36 Lenin Prospekt, Tomsk, 634050, Russia |
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| Abstract: | Cryptomelane-type manganese oxide (OMS-2) was rapidly prepared under ultrasonic irradiation in short time. Characterization results using X-ray powder diffraction (XRD), surface area analyzer, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), oxygen temperature-programmed desorption (O2-TPD) revealed that ultrasonic irradiation has tremendous effect on the surface area, morphology, surface defects, and redox properties of the OMS-2 materials. The OMS-2 prepared via ultrasonic irradiation shows nanoneedle morphology with smaller crystallite size, larger surface area (120.4 m2/g), more surface defects, and higher oxygen mobility, thus it demonstrates excellent activity in the catalytic combustion of dimethyl ether with a start-off temperature of 160 °C and a complete combustion temperature of 172 °C. |
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