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

doi:10.7503/cjcu20120769

Abstract

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

CLC Number:

O657

TrendMD:

ZHANG Na, LI Gang, CHENG Zhu-Hong. Effect of Morphology and Channel Structure of Chemosensor on Its Detection Ability for Hg²⁺[J]. Chem. J. Chinese Universities, 2013, 34(6): 1389.

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

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