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Sustainability
Volume 14
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10.3390/su14137585
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Article

Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials

by
Xiangxiang Wang
1,2,
Pengyu Zhang
1,2,
Fangwen Xu
1,2,
Bai Sun
1,2,*,
Guiyun Hong
1,2 and
Lining Bao
1,2
1
Engineering Research Center of Building Energy Efficiency Control and Evaluation, Ministry of Education, Anhui Jianzhu University, Hefei 230601, China
2
Department of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
*
Author to whom correspondence should be addressed.
Sustainability 2022, 14(13), 7585; https://doi.org/10.3390/su14137585
Submission received: 13 April 2022 / Revised: 10 June 2022 / Accepted: 15 June 2022 / Published: 22 June 2022
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Abstract

In this study, flower-like MoS2 nanomaterials were synthesized by hydrothermal method with excess thiourea. The adsorption performance of MoS2 adsorbent for methylene blue (MB) in azo dye wastewater was studied. The morphology, crystal phase, and microstructure of nano MoS2 samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The effects of adsorption isotherm, kinetics, different hydrothermal time, and pH on the adsorption experiment were studied. The results showed that the MoS2 adsorbent with a hydrothermal time of 1 h had good adsorption properties for MB. The adsorption data accord with the Langmuir isotherm model, and the maximum adsorption capacity of MoS2 adsorbent is 200 mg/g, and the adsorption kinetics agrees well with the pseudo two-level model. The removal rate of MB is not significantly affected by the pH values. The large pH range can still maintain the removal rate above 93.47%, and the regeneration and recovery properties of MoS2 were also explored. Finally, the adsorption mechanism of MoS2 on MB is discussed.
Keywords: adsorption; methylene blue; MoS2 nanomaterials adsorption; methylene blue; MoS2 nanomaterials

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MDPI and ACS Style

Wang, X.; Zhang, P.; Xu, F.; Sun, B.; Hong, G.; Bao, L. Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials. Sustainability 2022, 14, 7585. https://doi.org/10.3390/su14137585

AMA Style

Wang X, Zhang P, Xu F, Sun B, Hong G, Bao L. Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials. Sustainability. 2022; 14(13):7585. https://doi.org/10.3390/su14137585

Chicago/Turabian Style

Wang, Xiangxiang, Pengyu Zhang, Fangwen Xu, Bai Sun, Guiyun Hong, and Lining Bao. 2022. "Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials" Sustainability 14, no. 13: 7585. https://doi.org/10.3390/su14137585

APA Style

Wang, X., Zhang, P., Xu, F., Sun, B., Hong, G., & Bao, L. (2022). Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials. Sustainability, 14(13), 7585. https://doi.org/10.3390/su14137585

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