Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS<sub>2</sub>nanosheets

Qiao, Xiu-Qing; Hu, Fuchao; Tian, Fengyu; Hou, Dongfang; Li, Dongsheng

doi:10.1039/c5ra24328a

Cited by 152 publications

(80 citation statements)

References 41 publications

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“…21 The two-dimensional MoS 2 nanosheets showed potential as an efficient adsorbent for removal of methylene blue (MB) dye following the pseudo-second order adsorption kinetics. 22 The MoS 2 nanosheets decorated with magnetite Fe 3 O 4 nanoparticles exhibited good adsorption capacity for the Congo red and can be quickly separated from the suspension owing to their magnetic properties. 23 In this paper, we report one-step approach to synthesize the hierarchical microspheres of MoS 2 nanosheets and then demonstrated as highly efficient adsorbent for organic dyes.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Massey

Gusain

Kumari

et al. 2016

Ind. Eng. Chem. Res.

194

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This study demonstrates fast and efficient removal of dyes from the wastewater using nanostructural MoS 2 as a regenerative adsorbent. The hierarchical microspheres of MoS 2 nanosheets were prepared by one-step facile and scalable hydrothermal route using polyethylene glycol as a templating material. Chemical and morphological features of hierarchical microspheres of MoS 2 nanosheets were examined by XPS, FTIR, XRD, FESEM and HRTEM. The adsorption of a series of organic dyes using MoS 2 nanosheets was systematically investigated. The kinetic study illustrated that adsorption of methylene blue dye on to the MoS 2 nanosheets followed the pseudo second order model. The adsorption isotherm at the equilibrium was supported by Freundlich isotherm model. The hierarchical microspheres of MoS 2 nanosheets showed adsorption capacity as high as 297, 204, 216, 183, 146 mg.g -1 for methylene blue, malachite green, rhodamine 6G, fuchsin acid and congo red dyes, respectively. The high adsorption capacity was attributed to the hierarchical arrangement of MoS 2 nanosheets in the microscopic spheres, where dye molecules have very fast accessibility. Importantly, the hierarchical microspheres of MoS 2 nanosheets can be efficiently regenerated and reused for the dye adsorption of subsequent batch without compromising the adsorption capacity.

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Section: Introductionmentioning

confidence: 99%

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Massey

Gusain

Kumari

et al. 2016

Ind. Eng. Chem. Res.

194

View full text Add to dashboard Cite

show abstract

“…For instance, several reports claimed fast and efficient adsorption of different organic dyes using MoS 2 composites. [1][2][3][4]6,[21][22][23][24][25][26][27][28] He Li et al 29 used porous MoS 2 nanosheets to efficiently remove RhB, MB and MO with adsorption capacities of about 163.0 mg g À1 , 499.0 mg g À1 and 125.1 mg g À1 at 420 min, respectively. Also, Xiu and co-workers 21 found that the MoS 2 exhibits good and fast performance for removal of MB from aqueous solution, with an adsorption capacity of 146.43 mg g À1 in 6 min.…”

Section: Introductionmentioning

confidence: 99%

Revealing the role of the 1T phase on the adsorption of organic dyes on MoS₂ nanosheets

et al. 2019

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“…3) passing through the origin. A case opposite to the above, indicates different mass transfer rates in the initial and final stages of adsorption, indicating the involvement of film diffusion in addition to intra particle diffusion [33,34]. Figure 10d shows the linear fitting plot of intra particle diffusion model.…”

Section: Photocatalytic Experiments and Kinetic Analysismentioning

confidence: 92%

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

et al. 2019

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In this work, the fabrication of MoS 2 -Polyaniline (PANI) nanocomposites, by in situ polymerization, has been described and its application as a photocatalyst for the degradation of organic pollutants such as methylene blue (MB) and 4-chlorophenol (4-CP), has been reported. The disadvantages of MoS 2 such as poor electronic conductivity and agglomeration between the nanosheets, was overcome by intercalating 2D MoS 2 layers with 1D conducting polymer, Polyaniline (PANI). The composite material was characterised by SEM, TEM, BET, XRD, FTIR, UV-Vis spectroscopy and XPS, indicating proper intercalation between MoS 2 nanosheets and PANI. Consequently, the synthesized composites were used for the degradation of MB and 4-CP, followed by kinetic investigations to determine the rate kinetics. The photoactivity of the nanocomposite is explained by the transfer of photogenerated electrons from PANI to the CB of MoS 2 , thus preventing the direct recombination of electrons and holes. Hence, a positive synergistic effect between MoS 2 and PANI resulted in efficient photocatalytic degradation of organic dyes like MB.

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Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS₂nanosheets

Abstract: MoS2 ultrathin nanosheets display excellent adsorption ability towards methylene blue, with a maximum adsorption capacity of 146.43 mg g−1 in 300 seconds. Moreover, the adsorbent can be resued by washing with deionized water.

Cited by 152 publications

References 41 publications

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Revealing the role of the 1T phase on the adsorption of organic dyes on MoS₂ nanosheets

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

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Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS2nanosheets

Abstract: MoS2 ultrathin nanosheets display excellent adsorption ability towards methylene blue, with a maximum adsorption capacity of 146.43 mg g−1 in 300 seconds. Moreover, the adsorbent can be resued by washing with deionized water.

Cited by 152 publications

References 41 publications

Hierarchical Microspheres of MoS2 Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Hierarchical Microspheres of MoS2 Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Revealing the role of the 1T phase on the adsorption of organic dyes on MoS2 nanosheets

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

Contact Info

Product

Resources

About

Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS₂nanosheets

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Hierarchical Microspheres of MoS₂ Nanosheets: Efficient and Regenerative Adsorbent for Removal of Water-Soluble Dyes

Revealing the role of the 1T phase on the adsorption of organic dyes on MoS₂ nanosheets