高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (6): 1389.doi: 10.7503/cjcu20120769

• 分析化学 • 上一篇    下一篇

固载型光化学传感器的形貌及结构对检测Hg2+性能的影响

张娜, 李钢, 程铸洪   

  1. 大连理工大学化工学院, 精细化工国家重点实验室, 大连 116024
  • 收稿日期:2012-08-21 出版日期:2013-06-10 发布日期:2013-05-14
  • 通讯作者: 李钢,男,博士,教授,主要从事环境友好催化研究.E-mail:liganghg@dlut.edu.cn E-mail:liganghg@dlut.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20406005)资助.

Effect of Morphology and Channel Structure of Chemosensor on Its Detection Ability for Hg2+

ZHANG Na, LI Gang, CHENG Zhu-Hong   

  1. State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2012-08-21 Online:2013-06-10 Published:2013-05-14

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摘要：

采用氨丙基三乙氧基硅烷(APTES)、 异氰酸酯基三乙氧基硅烷(Tri)及纳米金颗粒作为连接体, 纯硅中孔分子筛HMS作为无机载体, 以分子改造后的染料罗丹明B(RhB)作为有机分子, 制得3种固载型光化学传感器, 用于检测水中的Hg2+. 采用扫描电子显微镜(SEM)、 透射电子显微镜(TEM)、 N2物理吸附和傅里叶变换红外光谱(FTIR)对材料进行表征, 并利用荧光光谱检测水溶液中的Hg2+. 结果表明, 3种连接体均成功地将有机分子RhB固载到HMS上, 所制备的固载型光化学传感器均能够检测水溶液中的Hg2+. 研究发现, 固载后样品的表面形貌及孔道结构对其检测能力产生影响, 具有完好表面形貌及孔道结构的样品RhB-Au-HMS对于Hg2+的检测能力最强, 内部孔道坍塌的样品RhB-APTES-HMS对于Hg2+的检测能力最弱.

关键词: 光化学传感器, 纯硅中孔分子筛(HMS), Hg2+的检测, 罗丹明 B

Abstract:

Three Hg2+ chemosensors were prepared by immobilizing a Rhodamine B(RhB) derivative on hexagonal mesoporous silica(HMS) via 3-aminopropyl-triethoxysilane(APTES), 3-(triethoxysilyl)propylisocyanate(Tri) and gold nanoparticles, respectively. The prepared chemosensors were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), N2 physical adsorption-desorption and Fourier transform infrared spectroscopy(FTIR). Further fluorescence spectra of chemosensors in sensing Hg2+ was detected. The results show that the immobilization process of Rhodamine B(RhB) is very successful and all of the chemosensors have Hg2+ detection ability. Moreover, the morphology and channel structure of the chemosensors have effects on the detection ability, that is, RhB-Au-HMS with intact morphology and wormlike channel structure has the most powerful detection ability and RhB-APTES-HMS with the collapsed channel structure has the weakest detection ability.

Key words: Chemosensor, Hexagonal mesoporous silica(HMS), Detection of Hg2+, Rhodamine B

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