Preparation of Hollow ZnO Microspheres Using Poly(methyl methacrylate) as a Template with Supercritical CO2-Ethanol Solution
Preparation of Hollow ZnO Microspheres Using Poly(methyl methacrylate) as a Template with Supercritical CO2-Ethanol Solution
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DOI：
10.1021/ie100551t
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发表时间：
2010-08
影响因子：
4.2
通讯作者：
K. Matsuyama;K. Mishima;Takafumi Kato;Kiyomi Ohara
中科院分区：
文献类型：
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作者：
K. Matsuyama;K. Mishima;Takafumi Kato;Kiyomi Ohara
以聚甲基丙烯酸甲酯（PMMA）为模板，在超临界CO2-乙醇溶液中制备了ZnO空心微球。将硝酸锌（Zn（NO3）2·6 H2O）的前驱体溶液溶解在超临界CO2/乙醇混合物中，并浸渍在PMMA模板表面。在空气中煅烧除去PMMA模板后，得到中空ZnO微球。通过热重分析（TGA）、X射线衍射（XRD）、氮气吸附-脱附实验和扫描电子显微镜（SEM）对产物进行了表征。考察了前驱体浓度、焙烧温度、浸渍介质、减压过程操作温度等实验条件对颗粒形貌的影响。
Hollow ZnO microspheres were prepared using poly(methyl methacrylate) (PMMA) as a template with the assistance of supercritical CO2-ethanol solution. A precursor solution of zinc nitrate (Zn(NO3)2·6H2O) was dissolved in supercritical CO2/ethanol mixtures and was impregnated on the surface of the PMMA template. After the removal of the PMMA template by calcination in air, hollow ZnO microspheres were obtained. The products were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), nitrogen adsorption−desorption experiments, and scanning electronic microscopy (SEM). Furthermore, the effects of experimental conditions, such as the concentration of precursor, calcination temperature, impregnation media, and operating temperature during the depressurization process, on the particle morphology were investigated.