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 language | English (US) |
|---|---|
| Pages (from-to) | 5693-5701 |
| Number of pages | 9 |
| Journal | Langmuir |
| Volume | 35 |
| Issue number | 17 |
| DOIs | |
| State | Published - Apr 30 2019 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry
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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 journal › Article
}
TY - JOUR
T1 - Reaction Kinetics for the Covalent Functionalization of Two-Dimensional MoS 2 by Aryl Diazonium Salts
AU - Li, Duo O.
AU - Chu, Ximo S.
AU - Wang, Qing
PY - 2019/4/30
Y1 - 2019/4/30
N2 - 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 .
AB - 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 .
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U2 - 10.1021/acs.langmuir.8b04288
DO - 10.1021/acs.langmuir.8b04288
M3 - Article
VL - 35
SP - 5693
EP - 5701
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 17
ER -