Synthesis of mesoporous C/MoS2 for adsorption of methyl orange and photo-catalytic sterilization

Yang, Huan; Yuan, Huaibo; Hu, Qingzhuo; Liu, Wenhong; Zhang, Dawei

doi:10.1016/j.apsusc.2019.144445

Cited by 27 publications

(11 citation statements)

References 20 publications

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“…Usually, the large specific surface area of the adsorbent possesses numerous active sites, which is beneficial for the diffusion of dye molecules and therefore improves their dye adsorption performances . Herein, the nitrogen adsorption–desorption isotherms and the related Barrett–Joyner–Halenda (BJH) adsorption analysis have been done for the prepared neutralized SiO 2 –H 3 BO 3 –HDTMS hydrogel, and the curves are shown in Supporting Information Figure S3.…”

Section: Resultsmentioning

confidence: 99%

“…The core level C 1s spectra (see Figure 3b 58 Therefore, it confirms the neutraliza- diffusion of dye molecules and therefore improves their dye adsorption performances. 61 Herein, the nitrogen adsorption− desorption isotherms and the related Barrett−Joyner−Halenda (BJH) adsorption analysis have been done for the prepared neutralized SiO 2 −H 3 BO 3 −HDTMS hydrogel, and the curves are shown in Supporting Information Figure S3. It is seen that the hydrogels have a V-type adsorption isotherm and H 3 -type hysteresis loop, suggesting the existence of a nanoporous structure with heterogeneous pores in it.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Lahiri

Liu

2021

Langmuir

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This study reports a novel cross-linking approach to fabricate the hydrothermally neutralized silica hydrogel of SiO2–H3BO3–hexadecyltrimethoxysilane by grafting alkylsilane groups onto the nanoporous silica. The synthesized silica hydrogel possessed a large specific surface area of 51.3 m2g–1 and showed excellent dye adsorption capability of cationic dyes in neutral (pH 7) and alkaline (pH 9) medium from wastewater. The colloidal electrokinetic potential analysis revealed that the outstanding adsorption efficiency of cationic dyes over anionic dyes strongly relies on the surface charge of the hydrogels. Moreover, the hydrophobic interactions between the dye molecules and the hydrogels were studied, and it was found that the dye adsorption performance can be tuned by altering the concentration of hydrophobic reagents of the hydrogel. The dye adsorption mechanism was established, and the kinetic study suggested that the adsorption is a pseudo-second-order reaction. Adsorption isotherms at various equilibrium conditions fitted well with the Langmuir isotherm. Therefore, this strongly supports the promising and practical application of the prepared silica hydrogel. The recyclability of the hydrogel was studied, and it showed 90% adsorption efficiency by the regenerated gel up to 6 cycles, which has a high potential in wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Lahiri

Liu

2021

Langmuir

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“…Based on the results, the MoS 2 NS showed much better dye or metal adsorption performance than bulk MoS 2 . According to the previous studies [3,37,39,40], the main mechanisms reported during the adsorption of dyes or metal by the inorganic materials involved physical hole-filling effects, electrostatic interactions, and ion exchange.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Fabrication of Ultrathin MoS2 Nanosheets and Application on Adsorption of Organic Pollutants and Heavy Metals

et al. 2020

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Owing to their peculiar structural characteristics and potential applications in various fields, the ultrathin MoS2 nanosheets, a typical two-dimensional material, have attracted numerous attentions. In this paper, a hybrid strategy with combination of quenching process and liquid-based exfoliation was employed to fabricate the ultrathin MoS2 nanosheets (MoS2 NS). The obtained MoS2 NS still maintained hexagonal phase (2H-MoS2) and exhibited evident thin layer-structure (1–2 layers) with inconspicuous wrinkle. Besides, the MoS2 NS dispersion showed excellent stability (over 60 days) and high concentration (0.65 ± 0.04 mg mL−1). The MoS2 NS dispersion also displayed evident optical properties, with two characteristic peaks at 615 and 670 nm, and could be quantitatively analyzed with the absorbance at 615 nm in the range of 0.01–0.5 mg mL−1. The adsorption experiments showed that the as-prepared MoS2 NS also exhibited remarkable adsorption performance on the dyes (344.8 and 123.5 mg g−1 of qm for methylene blue and methyl orange, respectively) and heavy metals (185.2, 169.5, and 70.4 mg g−1 of qm for Cd2+, Cu2+, and Ag+). During the adsorption, the main adsorption mechanisms involved the synergism of physical hole-filling effects and electrostatic interactions. This work provided an effective way for the large-scale fabrication of the two-dimensional nanosheets of transition metal dichalcogenides (TMDs) by liquid exfoliation.

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“…To enhance the adsorption activity of MoS 2 towards anionic dyes, Huan Yang et al to enhance the adsorption of anionic dyes like Methyl orange (450mg/g) (Yang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Removal and degradation of mixed dye pollutants by integrated adsorption-photocatalysis technique using 2-D MoS2/TiO2 nanocomposite

et al. 2021

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Synthesis of mesoporous C/MoS2 for adsorption of methyl orange and photo-catalytic sterilization

Cited by 27 publications

References 20 publications

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of Ultrathin MoS2 Nanosheets and Application on Adsorption of Organic Pollutants and Heavy Metals

Removal and degradation of mixed dye pollutants by integrated adsorption-photocatalysis technique using 2-D MoS2/TiO2 nanocomposite

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Synthesis of mesoporous C/MoS2 for adsorption of methyl orange and photo-catalytic sterilization

Cited by 27 publications

References 20 publications

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO2–H3BO3–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO2–H3BO3–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of Ultrathin MoS2 Nanosheets and Application on Adsorption of Organic Pollutants and Heavy Metals

Removal and degradation of mixed dye pollutants by integrated adsorption-photocatalysis technique using 2-D MoS2/TiO2 nanocomposite

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Product

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Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater