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以稳定的MoO3溶胶为前驱体,在180℃反应1—4 h,水热法制备了单晶MoO3纳米带,并通过X-射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、光电子能谱(XPS)和紫外-可见吸收光谱(UV-Vis)等测试手段对产物的组成和形貌进行了表征,探索了反应时间对产物结构和形貌的影响,同时研究了MoO3纳米带的光催化降解有机染料的性能。 相似文献
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祁琰媛 《武汉理工大学学报(材料科学英文版)》2018,33(6):1315-1322
MoO2 nanocrystals (NCs) on Ni foam were simply synthesized via a facile hydrothermal method and a dip-coating method. It was worth noting that ultrafine interconnected MoO2 nanocrystals (about 10 nm) were uniformly anchored on Ni foam to fabricate a particular three-dimensional architecture, which may provide more active sites and shorter transmission pathways for lithium ions. As binder-free anode, MoO2 NCs on Ni foam deliver a high initial discharge capacity of 990 mAh·g-1 and retain a reversible capacity of 924 mAh· g-1 after 100 cycles at a current density of 0.1 C. More importantly, when the current density returns from 2 C to 0.1 C, the capacity recovers to 910 mAh·g-1 (about 92% of the original high capacity), suggesting excellent cycling stability and rate capability. The particular 3D electrode as binder-free anode makes it a promising anode candidate for high-performance lithium-ion batteries. 相似文献
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以稳定的过氧钼酸溶胶为前驱体,乙醇为弱还原剂,在水热条件下首先制备出单斜相MoO2纳米棒(直径约50nm,长度约200nm);在此基础上引入氧化石墨烯,采用二次水热法制备出石墨烯修饰MoO2纳米复合材料。通过X射线衍射、拉曼光谱、场发射电子扫描电镜和高分辨透射电镜对产物的物相结构和微观形貌进行表征,结果表明,二次水热法引入的碳的存在形式为多层石墨烯,且石墨烯的引入未对氧化钼的结构和形貌产生影响。将MoO2/石墨烯纳米复合材料装配成锂离子电池进行电化学性能测试发现:石墨烯和纳米棒的协同作用使得复合材料的充放电容量得到大大提高。二氧化钼纳米材料的首次放电比容量由112 mAh/g提高到1289 mAh/g,且循环稳定性良好。 相似文献
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