Preparation of Elemental Tellurium Nanoparticles-Sucrose Sol and Its Antioxidant Activity in Vitro
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第5期
论文作者：李云志 PAN Jie JIANG Kun ZHOU Yanhui HUANG Jietao YE Jinxuan 白燕
文章页码：1048 - 1052
摘 要：The elemental tellurium nanoparticles（TeNPs）-sucrose sol was prepared by the reaction of sodium tellurite with ascorbic acid in sucrose aqueous solution.The results indicated that TeNPs were dispersion excellent in the TeNPs-sucrose sol and the morphology of TeNPs was needle-like with about 70 nm in width and 500 nm in length.The antioxidant activity of the TeNPs-sucrose sol in vitro was estimated by pyrogallol autoxidation method,Fenton method and oxygen radical absorbance capacity（ORAC） assay.The results showed that a certain amount of TeNPs-sucrose sol could effectively scavenge superoxide anion free radical and hydroxyl free radical with scavenging rates of 73 % and 57 %,respectively.ORAC assay was used to measure the total antioxidant capacity of TeNPs-sucrose sol.The order of ORAC values was 2.25 μmol·L-1 TeNPs-0.025 % sucrose sol > 0.025 % sucrose > 2.25 μmol·L-1Na 2 TeO 3 > 1.63 μmol·L-1ascorbic acid.The results suggested that the TeNPs-sucrose sol had the excellent antioxidant activity and TeNPs were the dominating contributors to antioxidant capacity of the TeNPs-sucrose sol.
李云志，PAN Jie，JIANG Kun，ZHOU Yanhui，HUANG Jietao，YE Jinxuan，白燕
Department of Chemistry,College of Life Science and Technology,Jinan University
摘 要：The elemental tellurium nanoparticles（TeNPs）-sucrose sol was prepared by the reaction of sodium tellurite with ascorbic acid in sucrose aqueous solution.The results indicated that TeNPs were dispersion excellent in the TeNPs-sucrose sol and the morphology of TeNPs was needle-like with about 70 nm in width and 500 nm in length.The antioxidant activity of the TeNPs-sucrose sol in vitro was estimated by pyrogallol autoxidation method,Fenton method and oxygen radical absorbance capacity（ORAC） assay.The results showed that a certain amount of TeNPs-sucrose sol could effectively scavenge superoxide anion free radical and hydroxyl free radical with scavenging rates of 73 % and 57 %,respectively.ORAC assay was used to measure the total antioxidant capacity of TeNPs-sucrose sol.The order of ORAC values was 2.25 μmol·L-1 TeNPs-0.025 % sucrose sol > 0.025 % sucrose > 2.25 μmol·L-1Na 2 TeO 3 > 1.63 μmol·L-1ascorbic acid.The results suggested that the TeNPs-sucrose sol had the excellent antioxidant activity and TeNPs were the dominating contributors to antioxidant capacity of the TeNPs-sucrose sol.
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