Wang Yi, Zhu Jun, Han Jie, Guo Rong
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, Jiangsu, People's Republic of China.
Nanotechnology. 2008 Oct 8;19(40):405606. doi: 10.1088/0957-4484/19/40/405606. Epub 2008 Aug 21.
Manganese dioxide (MnO(2)) nanoparticles have been prepared through the redox reaction between KMnO(4) and the nonionic surfactant Triton X-100 with the aid of rod-like micelles, hexagonal liquid crystals and reverse micelle templates, in which Triton X-100 acts both as template and reductant. MnO(2) nanorods (20-50 nm in diameter) can be obtained in rod-like micelles and hexagonal liquid crystals, whereas MnO(2) nanospheres (about 85 nm in diameter) are formed in reverse micelles. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to characterize the products. Modification of MnO(2) nanoparticles by rutin has been discussed using fluorescence spectra and UV-vis spectra, and the free radical eliminating investigations of surface-modified MnO(2) nanoparticles with rutin show that MnO(2) nanoparticles can improve the free-radical-scavenging activity of rutin.
二氧化锰（MnO₂）纳米颗粒是通过高锰酸钾（KMnO₄）与非离子表面活性剂吐温80（Triton X - 100）在棒状胶束、六方液晶和反胶束模板的辅助下发生氧化还原反应制备而成，其中吐温80既作为模板又作为还原剂。在棒状胶束和六方液晶中可获得直径为20 - 50纳米的MnO₂纳米棒，而在反胶束中则形成直径约85纳米的MnO₂纳米球。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对产物进行表征。利用荧光光谱和紫外可见光谱讨论了芦丁对MnO₂纳米颗粒的修饰作用，并且对表面用芦丁修饰的MnO₂纳米颗粒进行自由基清除研究表明，MnO₂纳米颗粒可提高芦丁的自由基清除活性。
