MoS2/Bentonite prepared by a facile method for efficient removal of Cd2+ from aqueous solution

Li, Wenlong; Kan, Xiaoqing; Zeng, Tianyu; Li, Shiyao; Cheng, Rong; Zhou, Min; Hou, Haobo

doi:10.1016/j.jallcom.2022.164508

Cited by 9 publications

(2 citation statements)

References 47 publications

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“…Substitution. To date, many MoS 2 -based nanocomposites, such as MoS 2 /SH-functionalized MWCNT, 24 MoS 2 /bentonite clay, 25 and graphene oxide (GO)/MoS 2 , 26 have been used to remove toxic heavy metals from water bodies. No study has focused on the incorporation of oxygen between the layers of MoS 2 to optimize disorderness which delivers the ability to improve the active sites for maximum absorption.…”

Section: Substitution Stability and Sustainability (3s) Charactersmentioning

confidence: 99%

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Muthu Prabhu,

Rubini,

Pyo

et al. 2024

ACS Appl. Nano Mater.

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In this study, we synthesized La-incorporated O-rich defective MoS 2 nanosheets by a simple, inexpensive, in situ hydrothermal reaction to self-exfoliate the bulky MoS 2 layers themselves so that they can readily trap hard base anions, arsenic (arsenite and arsenate), from water. Attempting to modify MoS 2 surfaces by incorporating O allows for more active sites, which is confirmed by powder XRD patterns where the exfoliated layers have a d-spacing of 0.63 nm, while the spacing for the bulky layers is 0.60 nm. The substitution of La at different equivalent ratios on the interlayer/surface improves the adsorption properties of arsenite and arsenate in simple solutions, as shown by the Langmuir adsorption density values of 0.7760 and 1.4363 mmol g −1 , respectively. When the O-rich MoS 2 layers were loaded with La, the adsorption densities improved, with La1.0 equiv showing the best values among the materials studied. The presence of O and S was more responsible for the removal of arsenite ions, and La and O, together with a small amount of N, were able to remove arsenate ions from water according to the well-known Pearson's Lewis acid−base principle. The stability of the materials was characterized after the experiments, and it was found that there was no leaching of the materials by ICP-OES and the stability was maintained after 6 regeneration cycles. With the exception of phosphate, which behaves chemically similar to arsenic, the adsorption densities were not significantly affected by the mono-and divalent anions, indicating the selectivity of the prepared materials. The synthesis cost of MoO x S 2−x was 2 times lower than that of bulky MoS 2 , and its adsorption properties were 10 times higher than those of the latter. The results suggest that La-substituted O-rich MoS 2 is a potential candidate for the removal of soft and hard base metals from water.

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Section: Substitution Stability and Sustainability (3s) Charactersmentioning

confidence: 99%

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Muthu Prabhu,

Rubini,

Pyo

et al. 2024

ACS Appl. Nano Mater.

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“…Therefore, composites with other nanomaterials are an effective way to improve their electrochemical properties. For instance, Zhang et al 78 used the characteristics of that MoS 2 has a good removal effect on heavy metal ions through complexation, electrostatic adsorption or redox reaction, and the characteristics of that nitrogen-doped molybdenum disulfide (N-MoS 2 ) has more adsorption sites 79,80 to prepare a nanocomposite material (L-Cys/MWCNTs/N-MoS 2 ) composed of cysteine, multi-walled carbon nanotubes and nitrogen-doped MoS 2 for simultaneous detect Pb 2+ and Cd 2+ (Fig. 7).…”

Section: Electrode Surface Modifiersmentioning

confidence: 99%

Review—Recent Advances in Electrochemical Sensing of Lead Ion

Zhou,

Zhang

et al. 2024

J. Electrochem. Soc.

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With the rapid development of modern industry, lead is widely used in all walks of life, and its harm to the environment is increasing. Due to the enrichment of heavy metals, the damage lead causes to human health is also growing. As such, rapid and sensitively detection of lead ion (Pb2+) has become an urgent problem to be solved in analytical and environmental disciplines. In recent years, electrochemical methods have received extensive attention in the detection of Pb2+ due to their unique advantages of high sensitivity, selectivity, and low cost. This review first explains the severe harm of Pb2+ to the human body, then goes into detail on the different electrochemical methods for Pb2+ detection. Afterwards, it comprehensively reviews the recent developments in electrochemical sensing of Pb2+ by using different electrode surface modifications. Finally, the challenges and development prospects of Pb2+ detection are outlined.

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Clays and Clay Minerals: Long-Lasting Applications in Environmental Remediation

Wijesooriya

Wijesekara

Bolan

et al. 2023

Advances in Material Research and Technology

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MoS2/Bentonite prepared by a facile method for efficient removal of Cd2+ from aqueous solution

Cited by 9 publications

References 47 publications

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Review—Recent Advances in Electrochemical Sensing of Lead Ion

Clays and Clay Minerals: Long-Lasting Applications in Environmental Remediation

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MoS2/Bentonite prepared by a facile method for efficient removal of Cd2+ from aqueous solution

Cited by 9 publications

References 47 publications

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS2 Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS2 Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Review—Recent Advances in Electrochemical Sensing of Lead Ion

Clays and Clay Minerals: Long-Lasting Applications in Environmental Remediation

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Product

Resources

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Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption

Self-Tunable, Exfoliated Oxygen-Rich Flower-like MoS₂ Nanosheets for Arsenic Removal: Investigations on Substitution, Stability, and Sustainability (3S) for Maxi-Sorption