Preparation of cholesterol oxidase nanoparticles and their application in amperometric determination of cholesterol |
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| Authors: | Chawla Sheetal Rawal Rachna Sonia Ramrati Pundir C S |
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| Institution: | 1. Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
2. Department of Chemical and Biological Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, People’s Republic of China
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| Abstract: | Highly dispersed platinum nanoparticles were deposited on gram quantities of non-functionalized multiwalled carbon nanotubes (MWCNTs) by atomic layer deposition (ALD) in a fluidized bed reactor at 300 °C. (Methylcyclopentadienyl) trimethylplatinum and oxygen were used as precursors. The results of TEM analysis showed that ~1.3 nm Pt nanoparticles were highly dispersed on non-functionalized MWCNTs. The porous structures of MWCNTs did not change with the deposition of Pt nanoparticles. For comparison, the commercial 3 wt% Pt/C catalyst was also characterized. The ALD-prepared Pt/MWCNT was used for the hydrogenation of xylose to xylitol. The ALD-prepared Pt/MWCNT showed the best catalytic performance with 100 % conversion of xylose and 99.3 % selectivity to xylitol, compared to commercially available Pt/C, Ru/C, and Raney Ni catalysts. The stability of ALD produced Pt/MWCNT catalyst was higher than that of the commercial Pt/C, due to the presence of surface defects on the MWCNTs and the strong metal–support interaction for the ALD-prepared Pt/MWCNT catalyst. |
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