期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 11, 期 6, 页码 5012-5017出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2011.4130
关键词
Element Selenium Nanoparticles; Ascorbic Acid; Selenocystine; Sol-Gel Compounds; Microstructure; Antioxidative Capacity
类别
资金
- National Natural Science Foundation of China [20771044, 21075053]
- Natural Science Foundation of Guangdong Province [8251063201000008]
This paper reported the preparation and antioxidant capacities of element selenium nanoparticies (nanoSe(0))-ascorbic acid (Vc) sol and nanSe(0/)Vc/selenocystine (SeCys) sol-gel compounds. NanoSe(0)-Vc sol was prepared by reduction of selenious dioxide (SeO2) with Vc. In the nanoSe(0)-Vc sol, highly concentrated Vc was also used as a modifier to modulate the diameter of Se-0 nanopartidies in the liquid phase. Then excellent nanoSe(0) sol-gel compounds were obtained by adding SeCys into the nanoSe(0)-Vc sol. The structure of the nanoSe(0)/Vc/SeCys sol-gel compounds was defined, which was constructed via C-Se, Se-H and O=C-Se valences and by interaction between SeCys and Vc via peptide bonds, esterification and dehydration. The antioxidant capacities of the nanoSe(0)-Vc sol and the nanoSe(0)/Vc/SeCys sol-gel compounds were estimated by oxygen radical absorption capacity (ORAC) assay. The nanoSe(0)/Vc/SeCys sol-gel compounds possessed a strong antioxidant capacity due to forming the perfect three-dimensional (3D) frameworks structure. The results suggested that the nanoSe(0)-Vc sol and the nanoSe(0)/Vc/SeCys sol-gel compounds might be potential medicine, especially antioxidant.
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