Journal article
Benzene carboxylic acid derivatized graphene oxide nanosheets on natural zeolites as effective adsorbents for cationic dye removal
Y Yu, BN Murthy, JG Shapter, KT Constantopoulos, NH Voelcker, AV Ellis
Journal of Hazardous Materials | ELSEVIER | Published : 2013
Abstract
Graphene oxide (GO) nanosheets were grafted to acid-treated natural clinoptilolite-rich zeolite powders followed by a coupling reaction with a diazonium salt (4-carboxybenzenediazoniumtetrafluoroborate) to the GO surface. Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) revealed successful grafting of GO nanosheets onto the zeolite surface. The application of the adsorbents for the adsorption of rhodamine B from aqueous solutions was then demonstrated. After reaching adsorption equilibrium the maximum adsorption capacities were shown to be 50.25, 55.56 and 67.56mgg-1 for pristine natural zeolite, GO grafted zeolite (GO-zeolite) and benz..
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Awarded by Australian Research Council
Funding Acknowledgements
The authors acknowledge the financial support by the Australian Research Council Linkage Grant (LP100100616). Thanks to Dr Mahaveer Kurkuri from University of Adelaide for his help with the BET surface area tests. This work was supported by the Australian Microscopy and Microanalysis Research Facility (AMMRF).