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管状ZnO的电化学法构筑及形成机理

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Abstract:

采用两步电化学法分别在氧化铟锡(indium-tinoxide,ITO)玻璃基板和经缓冲层处理的ITO玻璃基板上制备ZnO微米管和纳米管。从Zn(NO3)2和六亚甲基四胺水溶液中阴极电沉积制备ZnO柱状晶体。用乙二胺水溶液进行电化学腐蚀。用X射线衍射仪和扫描电镜研究产物的物相和形貌演变,初步探索管状结构的形成机理,结果表明管状结构由柱状结构中心腐蚀而形成,由柱状演变为喇叭状,再到管状;腐蚀首先发生在亚稳态的(0001)面,主要沿c轴方向进行;同时,从缺陷浓度高的中心向缺陷浓度低的外围进行。退火实验验证了缺陷腐蚀机理。

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