Plant-mediated synthesis of platinum nanoparticles and its bioreductive mechanism

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• 作者：Bingyun Zheng^a ; ^b ; Tao Kong^a ; Xiaolian Jing^a ; Tareque Odoom-Wubah^a ; Xianxue Li^b ; Daohua Sun^a ; Fenfen Lu^a ; Yanmei Zheng^a ; Jiale Huang^a ; ^{cola@xmu.edu.cn} ; Qingbiao Li^a
• 关键词：Biosynthesis ; PtNPs ; Cacumen Platycladi extract ; Reducing sugar ; Flavonoid
• 刊名：Journal of Colloid and Interface Science
• 出版年：2013
• 出版时间：15 April, 2013
• 年：2013
• 卷：396
• 期：Complete
• 页码：138-145
• 全文大小：2240 K

文摘

Pt nanoparticles (PtNPs) were biologically synthesized by reducing Na₂PtCl₄ with Cacumen Platycladi Extract (CPE). The effects of reaction temperature, initial Pt(II) concentration, and CPE percentage on Pt(II) conversion and the size distribution of the PtNPs were studied. The results showed that the Pt(II) conversion rate reached 95.9 % and that PtNPs measuring 2.4 ¡À 0.8 nm were obtained under the following conditions: reaction temperature, 90 ¡ãC; CPE percentage, 70 % ; initial Pt(II) concentration, 0.5 mM; reaction time, 25 h. In addition, the bioreduction of Pt(II) was attributed to reducing sugars and flavonoids rather than proteins. The elucidation of bioreductive mechanism of Pt(II) ions was achieved by investigating the changes that occurred in the reducing sugar, flavonoid and protein concentrations in the plant extract, leading to a good insight into the formation mechanism of such biosynthesized PtNPs.