کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
147713 | 456398 | 2014 | 8 صفحه PDF | دانلود رایگان |
• The heterogenization of a catalyst MnTMTACN was realized by microencapsulation technology.
• MnTMTACN well crystallized within the amorphous matrix.
• The microencapsulated MnTMTACN exhibited excellent catalytic activity and reusability.
Heterogenization of a biomimetic catalyst [MnIV2 (μ-O)3 (TMTACN)2][PF6]2·H2O (MnTMTACN) was realized by entrapping the manganese complex within biopolymer microspheres via an emulsification solvent extraction method. Elementary analysis and ultra violet-visible spectroscopy confirmed the successful encapsulation of MnTMTACN in the biopolymer microspheres. The surface and interior morphologies of the MnTMTACN-loaded microspheres were characterized with optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. High resolution transmission electron microscopy (HRTEM) revealed not only a confined crystallization of MnTMTACN but also a good dispersion of these nanocrystals within the biopolymer microspheres. The encapsulated MnTMTACN exhibited a high catalytic activity and could be reused at least 7 times in catalyzing the oxidation of 2′,3,4′,5,7-pentahydroxyflavone (morin) with hydrogen peroxide.
Figure optionsDownload as PowerPoint slide
Journal: Chemical Engineering Journal - Volume 240, 15 March 2014, Pages 116–123