Adsorption mechanism of different organic chemicals on fluorinated carbon nanotubes

Chemosphere
Hao LiBo Pan

Abstract

Multi-walled carbon nanotubes (MC) were fluorinated by a solid-phase reaction method using polytetrafluoroethylene (PTFE). The surface alteration of carbon nanotubes after fluorination (MC-F) was confirmed based on surface elemental analysis, TEM and SEM. The incorporation of F on MC surface was discussed as F incorporation on carbon defects, replacement of carboxyl groups, as well as surface coating of PTFE. The adsorption performance and mechanisms of MC-F for five kinds of representative organic compounds: sulfamethoxazole (SMX), ofloxacin (OFL), norfloxacin (NOR), bisphenol a (BPA) and phenanthrene (PHE) were investigated. Although BET-N2 surface area of the investigated CNTs decreased after fluorination, the adsorption of all five chemicals increased. Because of the glassification of MC-F surface coating during BET-N2 surface area measurement, the accessible surface area of MC-F was underestimated. Desorption hysteresis was generally observed in all the sorption systems in this study, and the desorption hysteresis of MC-F were stronger than the pristine CNTs. The enhanced adsorption of MC-F may be attributed the pores generated on the coated PTFE and the dispersed CNT aggregates due to the increased electrostatic repulsion...Continue Reading

References

Aug 30, 2008·Environmental Science & Technology·Bo PanBaoshan Xing
Jan 30, 2009·Environmental Science & Technology·Bo Pan, Baoshan Xing
Feb 3, 2009·Journal of Hazardous Materials·Rumi ChandMitsunori Yada
Feb 2, 2010·Physical Chemistry Chemical Physics : PCCP·W ZhangA Hamwi
Aug 19, 2010·Environmental Science & Technology·Fei WangBaoshan Xing
Mar 25, 2014·The Science of the Total Environment·Jin-Gang YuXiao-Qing Chen
Aug 30, 2014·Nanoscale Research Letters·Ali EatemadiSang Woo Joo
Dec 3, 2014·Water Research·Onur Guven Apul, Tanju Karanfil
May 20, 2015·Chemosphere·Yolanda PatiñoInmaculada Rodríguez-Ramos

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Citations

Jan 17, 2020·International Journal of Environmental Research and Public Health·Jian YuBin Liu

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