Adsorption of lead on the surfaces of pristine and B, Si and N-doped graphene

Navaratnarajah Kuganathan, Sripathmanathan Anurakavan, Poobalasingam Abiman, Poobalasuntharam Iyngaran, Evangelos Gkanas, Alexander Chroneos

Research output: Contribution to journalArticle

Abstract

The efficacy of graphene and graphene doped with B, Si and N surfaces for the removal of Pb atom is examined by utilising density functional theory calculations. The results show that the binding energy of a single Pb atom on pristine graphene surface is −0.71 eV with the charge transfer of 0.42 electros from Pb to the surface. There is a significant enhancement observed in the binding on the surfaces of B-doped graphene (−1.46 eV) and Si-doped graphene (−2.37 eV) with the transfer of 1.48 and 1.92 electrons to their respective surfaces. The binding energy for the N-doped graphene is endothermic (+0.42 eV) due to negligible charge transfer between the Pb and the doped surface. The intense binding nature between Pb and pristine as well as the doped graphene structures is introduced, analysed and discussed in terms of bond distances, binding energies, Bader charges and electronic structures.
Original languageEnglish
Article number412639
Number of pages8
JournalPhysica B: Condensed Matter
Volume600
Early online date14 Oct 2020
DOIs
Publication statusE-pub ahead of print - 14 Oct 2020

Keywords

  • Graphene
  • Binding energy
  • Doping
  • Lead adsorption
  • DFT

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