焙烧室温条件固相反应制备前驱物合成SnO2纳米棒的研究(英文)

Synthesis of SnO_2 nanorods via annealing precursor produced bysolid-state reaction at roomtemperature

室温条件下通过固相反应合成了SnO2纳米颗粒前驱物.在600～780℃对前驱物进行焙烧,在NaCl、KCl和KCl+NaCl的熔盐介质中SnO2前驱物纳米颗粒自组装生长形成SnO2 纳米棒.利用TEM、XRD和XPS对SnO2纳米棒结构、形貌和成分进行了研究.结果表明SnO2纳米棒直径为20～80nm,长度从几百纳米到十几微米.分析了SnO2 纳米颗粒前驱体熔盐介质中的生长,利用固相转变生长可以解释SnO2纳米棒在熔盐介质中的生长机制.

SnO2 nanorods were prepared via annealing precursor powders produced by solid- state reaction at room temperature. The precursor grows into SnO2 nanorods via self assembly annealing at 600～780℃ in NaCl,KCl and KCl＋NaCl flux medium respectively. The structure and morpho1ogy of SnO2 nanorods were studied by means of X-ray diffraction （XRD）,transmission electron microscopy （TEM） and X-ray photoelectron spectrum （XPS）. The results show that diameter and length of the as-made nanorods are in the range of 20nm to 80nm and several micrometers respectively.The solid-state transformation explains the formation mechanism of SnO2 nanorods.