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Synthesis and characterization of manganese doped CeO_2 nanopowders from hydrolysis and oxidation of Ce_(37)Mn_(18)C_(45) 被引量:2
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作者 杜亚男 倪建森 +3 位作者 胡鹏飞 王均安 侯雪玲 徐晖 《Journal of Rare Earths》 SCIE EI CAS CSCD 2013年第3期271-275,共5页
The Mn-doped Ce02 nanopowders with high catalysis activity were successfully fabricated through a simple hydrolyzed-oxidized approach. Firstly, the alloy Ce37Mnl 8C45 was prepared in vacuum induction melting furnace. ... The Mn-doped Ce02 nanopowders with high catalysis activity were successfully fabricated through a simple hydrolyzed-oxidized approach. Firstly, the alloy Ce37Mnl 8C45 was prepared in vacuum induction melting furnace. Subsequently, Mn-doped CeO2 nanopowders with 142 m2/g of specific surface area were obtained through a simple hydrolyzed-oxidized procedure of the alloy Those nanopowders were heat treated at different temperatures. The obtained materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and energy dispersive spectroscopy (EDS). And the catalytic activity on vinyl chloride (VC) emission combustion was investigated. The results showed that those nanopowders after hydrolyzed-oxidized from Ce37Mn18C45 mainly consisted of CeO2 and Mn304. Manganese element increased the thermal stability of CeO2 nanopowders. The Mn-doped CeO2 nanopowders had three morphologies. Small particles were Mn-doped CeO2, square particles were Mn304 and the rods were Mn304 and Mn203. The Mn-doped CeO2 nanopowders had good vinyl chloride (VC) emission catalytic performance. 展开更多
关键词 cerium manganese carbide Mn-doped ceo2 nanopowders hydrolyzed-oxidized VC catalytic performance rare earths
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