Nano TiO2-functionalized magnetic-cored dendrimer as a photocatalyst

Title
Nano TiO2-functionalized magnetic-cored dendrimer as a photocatalyst
Author
장준원
Keywords
Dendrimer; Titanium dioxide; Magnetite; Methyl orange; Electron transfer
Issue Date
2013-09
Publisher
Elsevier Science B.V
Citation
Applied Catalysis B, 2014, 147, P.973-979
Abstract
Nano-sized TiO2 terminals were linked with magnetic-cored dendrimers by a divergent method in this research. Significant improvement in photocatalytic activity was monitored in decolorization of methyl orange (MO) in comparison with bare nano TiO2 and Fe/Ti mixture at the same ratio. Enhanced photocatalytic activity of magnetic-cored dendrimers with nano-sized TiO2 (TD) can be attributed to restrained recombination of electron-hole pairs because of photoexcited electron capture in dendrimers. MO decolorization was facilitated by synergistic effect from surface adsorption and photocatalytic activity. Experimental results were fitted well with the Langmuir-Hinshelwood (L-H) model, which indicated that the photodecolorization after adsorption. The observed decolorization rate constant and the adsorption coefficient values were 0.0478 and 0.0812, respectively. Reuse of TD was also investigated for five successive runs. (C) 2013 Elsevier B.V. All rights reserved
URI
https://www.sciencedirect.com/science/article/pii/S0926337313006498
ISSN
0926-3373
DOI
1016/j.apcatb.2013.10.024
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > ETC
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