6533b7d2fe1ef96bd125f721

RESEARCH PRODUCT

Theoretical and practical aspects of chemical functionalization of carbon nanofibers (CNFs): DFT calculations and adsorption study

Jurate VirkutyteKaterina MakarovaManu LahtinenEkaterina V. RokhinaVeeriah Jegatheesan

subject

Environmental EngineeringMaterials scienceNanofiberschemistry.chemical_elementBioengineeringchemistry.chemical_compoundAdsorptionX-Ray DiffractionOrganic chemistryPhenolta116Waste Management and DisposalAqueous solutionRenewable Energy Sustainability and the EnvironmentCarbon nanofiberGeneral MedicineCarbonThermogravimetrychemistryChemical engineeringNanofiberThermogravimetryMicroscopy Electron ScanningSurface modificationAdsorptionCarbon

description

The nitric acid-functionalized commercial carbon nanofibers (CNFs) were comprehensively studied by instrumental (XRD, BET, SEM, TGA) and theoretical (DFT calculations) methods. The detailed surface study revealed the variation in the characteristics of functionalized CNFs, such as a decreased (up to 34%) surface area and impacted structural, electronic and chemical properties. The effects of functional groups were studied by comparison with pristine nanofibers. The results showed that the C-C bond lengths of the modified CNFs varied significantly. Chemical functionalization altered the frontier orbitals of the pristine material, and therefore altered the nature of their interactions with other substances. Moreover, the pristine and modified CNFs were tested for the removal of phenol from aqueous solutions. It was observed that surface modification tuned the adsorption capacity of carbon nanofibers (up to 0.35 mmol g(-1)), whereas original fibers did not demonstrate any adsorption capacity of phenol.

yearjournalcountryeditionlanguage
2011-08-23Bioresource Technology
https://doi.org/10.1016/j.biortech.2011.12.036