Abstract

Nanocrystalline cobalt oxide Co₃O₄ and composite ZnO/Co₃O₄ are obtained by chemical deposition from solutions followed by thermal annealing. It is shown that the presence of zinc oxide particles during synthesis radically changes the mechanism of the cobalt carbonates growth, which leads to a change in the phase composition, morphology, and properties of the material. The resistivity of the conducting layers formed from composite ZnO/Co₃O₄ is three orders of magnitude lower than the resistivity of Co₃O₄ layers, and composite ZnO/Co₃O₄ gas sensors demonstrate much higher gas sensitivity than that of control cobalt oxide sensors.

中文翻译：

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溶液化学沉积法合成非均相ZnO / Co 3 O 4纳米结构。

摘要

纳米晶氧化钴Co ₃ O ₄和复合ZnO / Co ₃ O ₄是通过从溶液中化学沉积，然后进行热退火获得的。结果表明，在合成过程中氧化锌颗粒的存在从根本上改变了碳酸钴生长的机理，从而导致了材料的相组成，形态和性能的改变。由复合ZnO / Co ₃ O ₄形成的导电层的电阻率比Co ₃ O ₄层和复合ZnO / Co ₃ O ₄的电阻率低三个数量级。 气体传感器显示出比对照氧化钴传感器更高的气体敏感性。