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采用喷雾燃烧法制备SnO2纳米棒,对其形貌和结构进行了表征.所制SnO2纳米棒长200～350nm,直径30～50nm,沿(001)方向生长.考察了Fe掺杂量和Sn4+浓度对SnO2纳米棒形貌的影响,分析了其生长机理.高温快速反应使Fe3+进入SnO2晶格,促使其沿(001)方向取向生长.对乙醇等有机气体的气敏性能测试结果表明,棒状SnO2比颗粒状的具有更优的气敏性能,在100×10-6(ψ)乙醇浓度下,棒状SnO2的灵敏度为12,反应和恢复时间分别为9.5和6s.
SnO2 nanorods were prepared by spray combustion method and their morphology and structure were characterized. The prepared SnO2 nanorods were grown in the direction of (001) from 200 to 350 nm in diameter and 30 to 50 nm in diameter. The effects of Fe doping amount and Sn4 + concentration On the morphology of SnO2 nanorods, the growth mechanism was analyzed.The rapid reaction at high temperature leads Fe3 + into the lattice of SnO2 and makes it grow in the direction of (001) .The gas sensitivity test of organic gas such as ethanol shows that rod-shaped SnO2 It has better gas sensitivity than granular. The sensitivity of rod-shaped SnO2 is 12 at 100 × 10-6 (ψ) ethanol concentration, and the reaction and recovery time are 9.5 and 6s, respectively.