植物介导合成铂纳米粒子及其生物还原机制。
Plant-mediated synthesis of platinum nanoparticles and its bioreductive mechanism.
机构信息
Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
出版信息
J Colloid Interface Sci. 2013 Apr 15;396:138-45. doi: 10.1016/j.jcis.2013.01.021. Epub 2013 Jan 25.
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±0.8nm were obtained under the following conditions: reaction temperature, 90°C; CPE percentage, 70%; initial Pt(II) concentration, 0.5mM; reaction time, 25h. 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.
Pt 纳米颗粒（PtNPs）是通过用侧柏叶提取物（CPE）还原 Na2PtCl4 生物合成的。研究了反应温度、初始 Pt（II）浓度和 CPE 百分比对 Pt（II）转化率和 PtNPs 尺寸分布的影响。结果表明，在以下条件下，Pt（II）转化率达到 95.9%，得到的 PtNPs 尺寸为 2.4±0.8nm：反应温度 90°C；CPE 百分比 70%；初始 Pt（II）浓度 0.5mM；反应时间 25h。此外，Pt（II）的生物还原归因于还原糖和类黄酮而不是蛋白质。通过研究植物提取物中还原糖、类黄酮和蛋白质浓度的变化，阐明了 Pt（II）离子的生物还原机制，从而深入了解了这种生物合成 PtNPs 的形成机制。
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