title: Plant-mediated synthesis of platinum nanoparticles and its bioreductive mechanism.
abstract: 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.
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
authors: Bingyun
authors: B
authors: Zheng
authors: Tao
authors: T
authors: Kong
authors: Xiaolian
authors: X
authors: Jing
authors: Tareque
authors: T
authors: Odoom-Wubah
authors: Xianxue
authors: X
authors: Li
authors: Daohua
authors: D
authors: Sun
authors: Fenfen
authors: F
authors: Lu
authors: Yanmei
authors: Y
authors: Zheng
authors: Jiale
authors: J
authors: Huang
authors: Qingbiao
authors: Q
authors: Li
mesh_terms: D002712:Chlorides / Q000737:chemistry; D029779:Cupressaceae / Q000378:metabolism*; D004365:Drugs, Chinese Herbal; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D010936:Plant Extracts / Q000378:metabolism*; D010984:Platinum / Q000737:chemistry*; D017671:Platinum Compounds / Q000737:chemistry
chemical_list: D002712:Chlorides; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D017671:Platinum Compounds; C036919:tetrachloroplatinate; D010984:Platinum