Cd^(2+)掺杂SnO_2纳米棒的制备与特性研究

Synthesis and Property of SnO_2 Nanorods Doped Cd^(2+)

在微乳液中SnCl和CdCl的混合水溶液与KBH4水溶液的还原反应制备了Cd2+掺杂SnO2纳米棒前驱物.在NaCl+KCl熔盐介质中,660℃焙烧前驱成功制备了Cd2+掺杂SnO2纳米棒一维纳米材料.利用TEM、XRD、XPS和H2-TPR对SnO2纳米棒形貌、成分和材料表面氧吸附特性、H2还原特性进行了表征和分析.SnO2纳米棒直径为10nm^20nm,长度从几百个纳米到几个微米,Cd2+掺杂后的SnO2纳米棒材料中CdO的含量可达5%.TPR的结果表明,Cd2+掺杂SnO2纳米棒表面吸附大量的氧具有较好的氧化还原特性.以SnO2纳米棒为原料,制备了厚膜气敏元件,考察了其H2敏感特性.

SnO2 nanorods doped Cd^2＋ with the rutile structure were synthesied by calcinedating precursor powders, which were prepared by redox reaction of SnCl and CdCl mixture aqueous solution to KBH4 aqueous solution in microemulsion in the presence of molten salt NaCl＋KCl. The structure and morphology of SnO2 nanorods doped Cd^2＋ were investigated by X-ray difiraction（XRD, transmission electron microscopy（TEM）, X-ray photoelectron spectrum （XPS） and temperature program redox（TPR）. The redox properties,gas sensitive properties of SnO2 nanorods doped Cd^2＋ materials were researched.