Green synthesis and stabilization of gold nanoparticles in chemically modified chitosan matrices

被引：51

作者：

Tiwari, Anand D. ^{[1
]}

Mishra, Ajay K. ^{[1
]}

Mishra, Shivani B. ^{[1
]}

Arotiba, Omotayo A. ^{[1
]}

Mamba, Bhekie B. ^{[1
]}

机构：

[1] Univ Johannesburg, UJ Nanomat Sci Res Grp, Dept Chem Technol, ZA-2028 Doornfontein, South Africa

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2011年 / 48卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Chitosan; Green synthesis; Gold nanoparticle stabilization; SURFACE; HYDROGENATION; CHEMISTRY; BIOLOGY; FILMS;

D O I：

10.1016/j.ijbiomac.2011.02.008

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Chitosan-N-2-methylhydroxypyridine-6-methylcorboxylate (Ch-PDC) and chitosan-N-2-methylhydroxypyridine-6-methylhydroxy thiocarbohydrazide (Ch-PDC-Th) were synthesized for the first time using chitosan as precursor. Chitosan, Ch-PDC, Ch-PDC-Th were used in the synthesis of gold nanoparticles (AuNP) in aqueous medium. Chitosan and Ch-PDC-Th possess reducing properties which enabled the 'green' synthesis of AuNPs. The stabilization of the AuNPs was as a result of the thiocarbide (S=C) and amine (NH2) groups in the chitosan matrix. The modified chitosan, its derivatives and the resulting AuNPs were characterized by Fourier transform infrared (FTIR) spectroscopy, Ultraviolet-visible (UV-vis) spectroscopy, Raman scattering measurements, powder X-ray diffraction (PXRD) and thermo gravimetric analysis (TGA). Particle size, morphology, segregation and individuality of the AuNPs were examined by transmission electron microscope (TEM) and energy dispersion spectroscopy (EDS). An average AuNPs size of 20 nm was observed for chitosan and Ch-PDC-Th while Ch-PDC was 50 nm. In comparison, AuNPs resulting from Ch-PDC-Th precursor has the most enhanced Raman and fluorescent intensities and was stable for over 2 months. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：682 / 687

页数：6

共 45 条

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