E-ISSN 2683-5961 | ISSN 2354-1814
 

Research Article 


Aggregation Kinetics of MoS2 in Organic Dispersion

Aminu Koko Rabiu, Murtala Ambursa Maidamma, Yahaya Y. Yakubu, Ibrahim Wawata Garba.

Abstract
Molybdenum disulphide (MoS2) is commonly exfoliated and dispersed in organic solvents for a number of technological applications. However, little is known about the effects of electrolytes on the colloidal stability of these dispersions. In this study, stable dispersions of MoS2 nanosheets were prepared in 1,2-dichlorobenzene (DCB) by ultrasonication. The dispersion was characterized using UV-Vis absorption spectroscopy, scanning electron microscopy, atomic force microscopy and Raman spectroscopy. The aggregation kinetics of the MoS2 dispersion was investigated at different concentrations of an organic electrolyte, bis(triphenylphosphoranylidene) ammonium tetrakis (4-chlorophenyl) borate, using sedimentation method based on the change in UV-Vis absorption of the MoS2 dispersion with centrifugation time after the addition of the electrolyte. Increasing electrolyte concentration in the dispersion induced MoS2 aggregation by the screening of the electrical double layer repulsion (EDL) barrier around the MoS2 nanosheets. The critical coagulation concentration (CCC) was estimated as 21.8 M. The result of this study demonstrates that electrostatic repulsion contributes substantially to the stability of the MoS2 organic dispersion.

Key words: MoS2, Dispersion stability, Aggregation Kinetics, Critical Coagulation Concentration, Organic electrolyte


 
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How to Cite this Article
Pubmed Style

Rabiu AK, Maidamma MA, Yakubu YY, Garba IW. Aggregation Kinetics of MoS2 in Organic Dispersion. Equijost. 2020; 7(1): 114-121.


Web Style

Rabiu AK, Maidamma MA, Yakubu YY, Garba IW. Aggregation Kinetics of MoS2 in Organic Dispersion. http://www.equijost.com/?mno=82119 [Access: July 28, 2020].


AMA (American Medical Association) Style

Rabiu AK, Maidamma MA, Yakubu YY, Garba IW. Aggregation Kinetics of MoS2 in Organic Dispersion. Equijost. 2020; 7(1): 114-121.



Vancouver/ICMJE Style

Rabiu AK, Maidamma MA, Yakubu YY, Garba IW. Aggregation Kinetics of MoS2 in Organic Dispersion. Equijost. (2020), [cited July 28, 2020]; 7(1): 114-121.



Harvard Style

Rabiu, A. K., Maidamma, . M. A., Yakubu, . Y. Y. & Garba, . I. W. (2020) Aggregation Kinetics of MoS2 in Organic Dispersion. Equijost, 7 (1), 114-121.



Turabian Style

Rabiu, Aminu Koko, Murtala Ambursa Maidamma, Yahaya Y. Yakubu, and Ibrahim Wawata Garba. 2020. Aggregation Kinetics of MoS2 in Organic Dispersion. Equity Journal of Science and Technology, 7 (1), 114-121.



Chicago Style

Rabiu, Aminu Koko, Murtala Ambursa Maidamma, Yahaya Y. Yakubu, and Ibrahim Wawata Garba. "Aggregation Kinetics of MoS2 in Organic Dispersion." Equity Journal of Science and Technology 7 (2020), 114-121.



MLA (The Modern Language Association) Style

Rabiu, Aminu Koko, Murtala Ambursa Maidamma, Yahaya Y. Yakubu, and Ibrahim Wawata Garba. "Aggregation Kinetics of MoS2 in Organic Dispersion." Equity Journal of Science and Technology 7.1 (2020), 114-121. Print.



APA (American Psychological Association) Style

Rabiu, A. K., Maidamma, . M. A., Yakubu, . Y. Y. & Garba, . I. W. (2020) Aggregation Kinetics of MoS2 in Organic Dispersion. Equity Journal of Science and Technology, 7 (1), 114-121.





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