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Permanent link:
https://www.ias.ac.in/article/fulltext/boms/046/0067 -
Keywords
Hydrothermal approach ;MoS$_2$ nanosheets ;adsorption ;tartrazine dye ;mercury removal. -
Abstract
A hydrothermal approach was followed to make highly exfoliated MoS$_2$ nanosheets with hexamethylenetetramine as the exfoliating agent. The synthesized MoS$_2$ nanosheets have a petal-like structure, as evidenced by scanning electron microscopy and transmission electron microscopy. Using this MoS$_2$ nanosheet, various adsorption isotherm and kinetic models were studied to remove contaminants such as tartrazine dye and mercury in the aqueous solutions. The Freundlich isotherm model, which yields the best match, implicates the multilayer adsorption process. In this study, pseudo-first-order kinetics was found to be a good fit indicating the physisorption process for tartrazine dye adsorption and pseudo-second-order kinetics for mercury ion adsorption. Also, it was noticed that MoS$_2$ nanosheets had eliminated 99% of the tartrazine dye and mercury from the aqueous solution within 5 min and 6 h intervals of time, respectively. The maximal adsorption capabilities for tartrazine dye and mercury ions were 41 and 495 mg g$^{–1}$, respectively.
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Graphical Abstract
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Author Affiliations
RAGINI PIRARATH1 BELQASEM ALJAFARI2 JERRY J WU3 SAMBANDAM ANANDAN1
- Nanomaterials and Solar Energy Conversion Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India
- Department of Electrical Engineering, College of Engineering, Najran University, Najran 11001, Saudi Arabia
- Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan
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Dates
- Published
- 31 March 2023
- Manuscript received
- 24 June 2022
- Accepted
- 24 November 2022
- Final version published online
- 31 March 2023
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Supplementary Material
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Bulletin of Materials Science
Volume 46, 2023
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