Gas-sensing property improvement of ZnO by hierarchical flower-like architectures
Gas-sensing property improvement of ZnO by hierarchical flower-like architectures
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DOI：
10.1016/j.matlet.2011.07.059
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发表时间：
2011-12-01
影响因子：
3
通讯作者：
Wang, Zhongchang
中科院分区：
文献类型：
--
作者：
Guo, Weiwei;Liu, Tianmo;Wang, Zhongchang
新的形貌通常在控制纳米材料的性能方面起着关键作用。本文以柠檬酸钠和聚乙二醇为原料，采用水热法合成了氧化锌纳米晶体，发现其具有层次化的花朵状结构。进一步的对比研究表明，柠檬酸钠有助于纳米片的均匀生长，而聚乙二醇为纳米片的组装提供了成核位置，两者在形成这种独特的花状结构中都起着关键作用。因此，由于其最大数量的花瓣、间隔和气孔，该样品被发现对目标乙醇表现出良好的传感性能。这种意想不到的形貌为氧化锌作为一种潜在的气敏材料在未来的广泛传感器应用中提供了巨大的希望。(C)2011爱思唯尔B.V.保留所有权利。
New morphologies often play a critical role in governing properties of nano-materials. Here, using hydrothermal method and reagents of sodium citrate and polyethylene glycol (PEG), we synthesize the ZnO nano-crystals and find that they exhibit hierarchical Flower-like architectures assembled by nanosheets. Further comparative studies demonstrate that the sodium citrate assists a uniform growth of the nanosheets, and the PEG provides nucleation sites for the assembling of the nanosheets, both of which play a critical role in producing such unique Flower-like architectures. Consequently, this sample is found to show excellent sensing performances to the target ethanol owing to its largest amount of petals, intervals, and pores. Such an unexpected morphology holds substantial promise for rendering ZnO as a potential gas-sensing material for a broad range of future sensor applications. (C) 2011 Elsevier B.V. All rights reserved.