Imaging Science and Photochemistry ›› 2016, Vol. 34 ›› Issue (4): 336-345.DOI: 10.7517/j.issn.1674-0475.2016.04.336

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Interaction Between ZnS Nanoparticles and Gelatin

DENG Qiu, LI Youqun, TANG Shihua   

  1. School of Chemistry and Chemical Engineering,Guangxi University for Nationalities, Nanning 530008, Guangxi, P.R.China
  • Received:2015-12-16 Revised:2016-01-18 Online:2016-07-15 Published:2016-07-15

Abstract:

The interaction between ZnS nanoparticles and gelatin was investigated at pH=7.40 by TEM, XRD, UV-Vis, FT-IR, synchronous fluorescence and three-dimensional fluorescence spectroscopy. FT-IR spectra provide the evidence that ZnS probably has the direct chemical bonding reaction with the nitrogen and oxygen atoms, and carboxyl oxygen in gelatin macromolecule, to form ZnS/gelatin bionanocomposites. The intrinsic fluorescence of gelatin was obviously quenched by ZnS nanoparticles, which is a static quenching procedure. The apparent thermodynamic formation constants and thermodynamic parameters at different temperatures were calculated by the modified Scatchard equation, and the results indicated that the reaction was spontaneous and entropy-driven. The synchronous fluorescence and three-dimensional fluorescence spectra showed that the gelatin conformation changed after binding with ZnS. The results can provide important information for exploring the preparation and biological application of this kind of bionanocomposites.

Key words: ZnS, gelatin, ZnS/gelatin bionanocomposite, fluorescence spectroscopy