Reaction Kinetics for the Covalent Functionalization of Two-Dimensional MoS 2 by Aryl Diazonium Salts

Duo O. Li, Ximo S. Chu, Qing Wang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The two-dimensional transition-metal dichalcogenide molybdenum disulfide (MoS 2 ) has been intensely studied in the past several years due to its exceptional electronic, optical, and chemical properties in a wide range of applications. The chemical functionalization of MoS 2 allows its properties and interfacial interactions to be tuned and controlled. Recently, we reported the direct covalent functionalization of semiconducting MoS 2 with aryl diazonium salts, without the use of harsh initial treatments or phase engineering. In this paper, we confirm and expand the covalent functionalization reaction model by performing a detailed study of the reaction kinetics for monolayer MoS 2 functionalized by 4-nitrobenzene tetrafluoroborate (4-NBD). We find that both the Freundlich and Temkin isotherm models are good descriptors of the reaction due to the energetically inhomogeneous surface of MoS 2 and the indirect adsorbate-adsorbate interactions from previously attached nitrophenyl groups, respectively. The reaction kinetics was then found to be well described using a pseudo-second-order model, showing that the order of this reaction is two. This study supports our previous work and gives us a deeper understanding of the nature of the covalent functionalization of MoS 2 .

Original languageEnglish (US)
Pages (from-to)5693-5701
Number of pages9
JournalLangmuir
Volume35
Issue number17
DOIs
StatePublished - Apr 30 2019

Fingerprint

Reaction kinetics
reaction kinetics
Salts
Adsorbates
salts
molybdenum disulfides
Nitrobenzene
nitrobenzenes
chemical properties
Electronic properties
Chemical properties
Molybdenum
Transition metals
Isotherms
Monolayers
isotherms
Optical properties
transition metals
interactions
engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Reaction Kinetics for the Covalent Functionalization of Two-Dimensional MoS 2 by Aryl Diazonium Salts . / Li, Duo O.; Chu, Ximo S.; Wang, Qing.

In: Langmuir, Vol. 35, No. 17, 30.04.2019, p. 5693-5701.

Research output: Contribution to journalArticle

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