Synthesis of “L-cysteine–graphene oxide” hybrid by new methods and elucidation of its uptake properties for Hg(II) ion

Daneshmand, M ; Sharif University of Technology | 2018

851 Viewed
  1. Type of Document: Article
  2. DOI: 10.1080/01496395.2017.1418889
  3. Publisher: Taylor and Francis Inc , 2018
  4. Abstract:
  5. This study introduces two new, simple, and scalable methods for synthesis of “cysteine–graphene oxide” hybrid, namely nucleophilic and covalent methods. Produced adsorbents could uptake 500 and 600 mg Hg2+/g, respectively, which are larger than capacities of most of the commercial adsorbents. By means of different instrumental techniques, chemical structures of the obtained graphene products were disclosed, and two pertinent mechanisms for their formations were suggested. Time for attaining uptake equilibrium for nucleophilic/covalent samples was 30 min/150 min, and kinetics was controlled by liquid film resistance/chemical reaction mechanisms, respectively. High selectivity and good regenerability are other key features of the prepared adsorbents. © 2017 Maryam Daneshmand, Mohammad Outokesh, Ahmad Akbari, Mohammadreza Kosari, and Ahmad Tayyebi
  6. Keywords:
  7. Adsorption capacity ; Graphene oxide ; Nucleophilic and covalent adsorbent ; Adsorbents ; Amino acids ; Liquid films ; Mercury compounds ; Reaction kinetics ; Scalability ; Adsorption capacities ; Graphene oxides ; High selectivity ; Instrumental techniques ; L-cysteine ; Mercuries (Hg) ; Reaction mechanism ; Uptake properties ; Graphene
  8. Source: Separation Science and Technology (Philadelphia) ; Volume 53, Issue 6 , 2018 , Pages 843-855 ; 01496395 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/01496395.2017.1418889?journalCode=lsst20