物理化学学报 >> 2003, Vol. 19 >> Issue (10): 896-901.doi: 10.3866/PKU.WHXB20031003

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亚甲基蓝在云母表面吸附状态的研究

赵立艳;王学恺;郭玉国;吴念祖;谢有畅   

  1. 北京大学化学与分子工程学院,物理化学研究所,分子动态与稳态结构国家重点实验室,北京　100871; 中国科学院化学研究所,北京　100080
  • 收稿日期:2003-03-11 修回日期:2003-05-20 发布日期:2003-10-15
  • 通讯作者: 吴念祖 E-mail:wunz@chem.pku.edu.cn

Adsorption of Methylene Blue on the Muscovite

Zhao Li-Yan;Wang Xue-Kai;Guo Yu-Guo;Wu Nian-Zu;Xie You-Chang   

  1. Institute of Physical Chemistry, College of Chemistry ＆ Molecular Engineering, Peking University, Beijing　100871; Institute of Chemistry, Chinese Academy of Sciences, Beijing　100080
  • Received:2003-03-11 Revised:2003-05-20 Published:2003-10-15
  • Contact: Wu Nian-Zu E-mail:wunz@chem.pku.edu.cn

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摘要： 利用XPS测定吸附前后亚甲基蓝（MB）各原子的电子结合能的变化,以判断原子化学环境的改变,从而确定MB在云母表面的吸附位点是二甲胺基上的氮原子.通过AFM测量得到吸附于云母表面的MB分子的平均高度为0.820 nm,这证实了Hähner吸附模型的正确性,即MB分子的最大横截面以65～70°倾斜在云母的（001）表面上.

关键词: 亚甲基蓝, 云母, 光电子能谱（XPS）, 原子力显微镜（AFM）, 吸附

Abstract: The electron structures of MB molecule and MB adsorbed on the mica surface were measured by XPS to determine how the chemical environment is changed when MB was adsorbed on the mica surface. We concluded that the nitrogen atom of the dimethylamino- is the adsorption site for the MB molecule. From AFM image of MB adsorbed on the mica surface, its corresponding height averages to 0.820 nm. This agrees well with the model proposed by Hähner, that the MB molecules are tilted with their largest face inclined at 65～70° with respect to the surface of mica.

Key words: Methylene blue, Muscovite, XPS, AFM, Adsorption