synthesis of silver nanoparticles in chitosan, gelatin and chitosangelatin bionanocomposites by a chemical reducing agent and their characterization合成银纳米粒子的壳聚糖、明胶和chitosangelatin bionanocomposites化学还原剂及其表征.pdf

Molecules 2011, 16, 7237-7248; doi:10.3390/molecule OPEN ACCESS molecules ISSN 1420-3049 /journal/molecules Article Synthesis of Silver Nanoparticles in Chitosan, Gelatin and Chitosan/Gelatin Bionanocomposites by a Chemical Reducing Agent and Their Characterization Mansor Bin Ahmad *, Jenn Jye Lim, Kamyar Shameli, Nor Azowa Ibrahim and Mei Yen Tay Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia; E-Mails: jennjye87@ (J.J.L.); kamyarshameli@ (K.S.); norazowa@.my (N.A.I.); tmyen_87@ (M.Y.T.) * Author to whom correspondence should be addressed; E-Mail: mansorahmad@.my; Tel.: +603 Fax: +603 Received: 23 June 2011; in revised form: 20 July 2011 / Accepted: 3 August 2011 / Published: 25 August 2011 Abstract: In this research, silver nanoparticles (AgNPs) were synthesized in chitosan (Cts), Cts/gelatin and gelatin suspensions using a chemical reducing agent. Cts and gelatin were used as natural stabilizers and solid support, whereas AgNO was used as the silver 3 precursor. Sodium borohydride (NaBH4) was used as the reducing agent. The properties of AgNPs in Cts, Cts/gelatin and gelatin bionanocomposites (BNCs) were studied in terms of their surface plasmon resonance, crystalline structure, average diameter size, particle distributions, surface topography and functional groups. All the samples were characterized by UV-visible spectroscopy, powder X-ray dif