Shape-controlled fabrication of porous ZnO architectures and their photocatalytic properties
Shape-controlled fabrication of porous ZnO architectures and their photocatalytic properties
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DOI：
10.1016/j.jssc.2008.10.009
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发表时间：
2009
影响因子：
3.3
通讯作者：
Jun Zheng;Zhiyuan Jiang;Q. Kuang;Zhaoxiong Xie;Rong-Bin Huang;Lan-Sun Zheng
中科院分区：
文献类型：
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作者：
Jun Zheng;Zhiyuan Jiang;Q. Kuang;Zhaoxiong Xie;Rong-Bin Huang;Lan-Sun Zheng
在本文中，我们报告了一种简单的两步法来制备多孔八面体和棒状ZnO结构。通过控制前驱体ZnC2O4·2H2O的形貌可以方便地调节多孔ZnO颗粒的形貌。SEM和TEM表征结果表明，这些多孔ZnO结构是由大量的ZnO初级纳米粒子随机附着而成。基于热重分析，我们认为，在煅烧过程中，水蒸气，CO和CO2的释放导致形状控制的颗粒中形成高密度的孔。进一步的实验结果表明，由于所制备的多孔ZnO颗粒具有较大的比表面积，因此具有良好的光催化活性。
In this paper, we report a simple two-step approach to prepare porous octahedron- and rod-shaped ZnO architectures. The morphology of porous ZnO particles can be conveniently tuned by controlling morphologies of the ZnC2O4·2H2O precursor. SEM and TEM characterization results indicate that these porous ZnO architectures are built up by numerous ZnO primary nanoparticles with random attachment. Based on thermogravimetry analysis, we believe that the release of water vapor, CO and CO2leads to the formation of high-density pores in shape-controlled particles during the calcination process. Further experimental results indicate that as-prepared porous ZnO particles exhibit good photocatalytic activity due to large surface area.