Fabrication of succinic acid-γ-Fe2O3 nano core-shells

被引：23
|
作者：
Jayarathne, L. [3 ]
Ng, W. J. [4 ]
Bandara, A. [2 ]
Vitanage, M. [3 ]
Dissanayake, C. B. [3 ]
Weerasooriya, R. [1 ]
机构：
[1] Univ Peradeniya, Fac Agr, Dept Soil Sci, Peradeniya 19000, Sri Lanka
[2] Univ Peradeniya, Dept Chem, Peradeniya 19000, Sri Lanka
[3] Inst Fundamental Studies, Nano Team, Kandy 20000, Sri Lanka
[4] Nanyang Technol Univ, Dept Civil & Environm Engn, Singapore 639798, Singapore
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2012年 / 403卷
关键词：
Succinic acid; Streptomycin; gamma-Fe2O3; Core-shell nano particles; DENSITY-FUNCTIONAL THEORY; IRON-OXIDE NANOPARTICLES; SITU ATR-FTIR; MAGNETITE NANOPARTICLES; SURFACE COMPLEXATION; ADSORPTION; REACTIVITY; HEMATITE; SPECTROSCOPY; EQUILIBRIUM;
D O I：
10.1016/j.colsurfa.2012.03.061
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Core-shell nano-structures were synthesized by adsorbing succinic acid on gamma-Fe2O3 nanoparticles (hereafter referred to as core-shell nanoparticles or core-shells). Streptomycin was chosen as a model drug to attach on gamma-Fe2O3 core-shells. Vibration spectroscopic data confirmed the specific adsorption of organic ligands (i.e., succinic acid or streptomycin) onto gamma-Fe2O3 via bi-dentate, bi-nuclear complex. Possible molecular configurations between organic ligands and gamma-Fe2O3 were examined by density functional theory (OFT) using Fe-6(OH)(18)(H2O)(6) ring cluster. The measured vibration frequencies and bond distances (i.e., Fe-O-Fe, Fe-O-w, and Fe-OH units) of the optimized gamma-Fe2O3 cluster matched well with the calculations. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：96 / 102
页数：7
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