State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China.
ACS Appl Mater Interfaces. 2012 Oct 24;4(10):5346-52. doi: 10.1021/am3012966. Epub 2012 Sep 24.
Mesoporous and hollow structure have been attracting increasing attention for their special properties and potential applications. Here we show a facile fabrication of hollow and mesoporous ZnO microsphere via a one-step wet chemical process using polyethylene glycol (PEG, MW 200) as the solvent and soft template. The morphology and structure of the products were characterized by using scanning electron microscopy and X-ray powder diffraction techniques. Thermal analysis and Fourier transform infrared spectroscopy techniques were also performed to show the properties of the precursor and annealed product. A possible growth mechanism of hollow and mesoporous ZnO microsphere was also proposed. The Brunauer-Emmett-Teller surface area of ZnO microsphere is 28.5 m(2)g(-1) and the size of mesopores is about 10 nm. The Photoluminescence spectra of the as-synthesized ZnO hollow microspheres were also presented. The mesoporous and hollow structure enhance the gas sensitivity of ZnO microsphere, and the obtained ZnO microspheres based sensor has an excellent performance for precision detection of ethanol and acetone with low concentration.
介孔和中空结构因其特殊的性质和潜在的应用而受到越来越多的关注。在这里，我们展示了一种通过一步湿化学过程制备中空和介孔 ZnO 微球的简便方法，该过程使用聚乙二醇（PEG，MW 200）作为溶剂和软模板。使用扫描电子显微镜和 X 射线粉末衍射技术对产物的形貌和结构进行了表征。还进行了热分析和傅里叶变换红外光谱技术，以显示前体和退火产物的性质。还提出了中空和介孔 ZnO 微球的可能生长机制。ZnO 微球的 Brunauer-Emmett-Teller 比表面积为 28.5 m(2)g(-1)，介孔的尺寸约为 10 nm。还呈现了所合成的 ZnO 空心微球的光致发光光谱。介孔和中空结构提高了 ZnO 微球的气体灵敏度，并且基于所获得的 ZnO 微球的传感器具有用于精确检测低浓度乙醇和丙酮的优异性能。
