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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

玉米植株中的植硅石及其纳米SiO2的制备

崔 鹏, 苑世领, 徐桂英   

  1. 山东大学 胶体与界面化学教育部重点实验室, 济南 250100
  • 收稿日期:2008-09-03 修回日期:2008-12-11 出版日期:2009-05-20 网络出版日期:2009-05-20

Phytoliths in Mealies Corns and Preparation of SiO2 Nano-materials

CUI Peng, YUAN Shi-Ling, XU Gui-Ying   

  1. Key Lab of Colloid and Interface Chemistry, Shandong University, Jinan 250100,China
  • Received:2008-09-03 Revised:2008-12-11 Published:2009-05-20 Online:2009-05-20

PDF (PC)

1831

被引次数

2

摘要： 以玉米植株为原料制备了纳米结构SiO2. 通过常温混酸浸泡等手段在玉米植株中观察到了微米级植硅石，并以植硅石为原料，通过煅烧、硝酸煮沸等方法制备了纳米级SiO2；运用X射线粉末衍射（XRD）、光学显微镜、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、电子能谱（EDS）、红外光谱(IR)等手段对样品进行了表征. 结果表明，玉米茎表皮和叶中植硅石均为哑铃形，前者沿木质素导管方向顺向排列，后者为横向排列；经硝酸煮沸煅烧后，植硅石可以形成103nm左右的SiO2球，并随着煅烧温度的升高，纳米球逐渐交联.

关键词: 植硅石, 玉米植株, 纳米SiO2

Abstract: Nanostructure SiO2 was prepared from mealies corns. The micron phytoliths were obtained after treatment with mixed acids, using the phytolith samples as raw materials, nano-silica was obtained through calcining at certain temperature after boiling in the nitric solution. And its structure was characterized by X-ray diffraction (XRD), optical microscope, transmission electron microscope (TEM), scanning electron microscope (SEM), energy dispersive spectroscope (EDS) and Infrared Spectroscope (IR). The results show that the phytoliths are all dumbbelltype in cornstalks and leaves in the micro level; however they are located along or against vertically the lignose, respectively. The nanosilica with diameter of 103nm is obtained through calcination after boiling in HNO3 solution, and the nano SiO2 crosslink in higher temperature.

Key words: phytoliths, mealies corns, nano SiO2

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