A three-dimensional porous MoS<sub>2</sub>–PVP aerogel as a highly efficient and recyclable sorbent for oils and organic solvents

Song, Pin; Di, Jun; Chen, Haiping; Zhao, Si-Rui; Wu, Cao; Cao, Xun; Wang, Meiling; Xiong, Jun; Ye, Xinli

doi:10.1039/d0ma00219d

Cited by 11 publications

(3 citation statements)

References 75 publications

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“…Moreover, there were two crystallization peaks for M12‐15 and M12‐20. Since PVP is a well‐known non‐crystallization polymer, 47 those crystallization peaks could only be attributed to crystallization of PVDF, which might be grafted with PVP with various chain lengths. For the second heating scan (Figure 7(C)), every membrane revealed single melting peak, and the melting temperatures of the NVP modified membranes were still lower than that of M12‐0.…”

Section: Resultsmentioning

confidence: 99%

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Wang

Duan

Xiong

2021

Journal of Polymer Science

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Increasing hydrophilicity of hydrophobic membrane is one of the strategies to improve its antifouling performance. Herein we report a procedure of reactive‐vapor induced phase separation to prepare an N‐vinyl pyrrolidone (NVP) modified poly(vinylidene fluoride) (PVDF) membrane to improve its hydrophilicity. PVDF solution containing NVP monomer was cast in ammonia water vapor atmosphere to prepare the modified membrane. During the process, PVDF was dehydrofluorinated by the reactive vapor of ammonia water to generate double bond of FC═CH, and then NVP was grafted. The degree of grafting modification and the microstructure evolution of the membrane were studied by adjusting the amount of NVP addition. A possible mechanism of membrane formation from crystallization gelling to non‐crystallization gelling has been proposed to understand the morphology change from nodular sphere to bi‐continuous microstructure with fibril matrix. It has been found that rising the degree of modification has changed the polymorph of PVDF from β to α crystalline phase, as well as turned the hydrophobic PVDF membrane into hydrophilic. Moreover, the modified membrane displayed obvious reduction in bovine serum albumin adsorption, suggesting improvement in anti‐fouling performance. Therefore, our work provides an easy strategy to prepare hydrophilic PVDF membrane, which may have promising potential applications.

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Section: Resultsmentioning

confidence: 99%

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Wang

Duan

Xiong

2021

Journal of Polymer Science

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“…The 3D g-C 3 N 4 /PVA nanosheet-based aerogel was fabricated by the previous method. − The g-C 3 N 4 NS powder was uniformly dispersed in PVA solutions (1 mg cm –3 ) under the mechanical stirrer, and the concentration of g-C 3 N 4 NSs was kept at 5, 10, 15, and 20 mg cm –3 , respectively. Where the corresponding weight ratios (g-C 3 N 4 /PVA) were 5:1, 10:1, 15:1, and 20:1, respectively.…”

Section: Methodsmentioning

confidence: 99%

Reusable Graphitic Carbon Nitride Nanosheet-Based Aerogels as Sorbents for Oils and Organic Solvents

Song

Wang

et al. 2020

ACS Appl. Nano Mater.

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Increasing oily wastewater and frequent oil leakage accidents have become a serious global environmental problem. To improve the adsorption capacity and simplify the recovery process of crude oil, it is a great significance to develop various advanced oil adsorbents and oilcollecting devices. In this work, a lightweight and compressible threedimensional (3D) g-C 3 N 4 /poly(vinyl alcohol) (PVA) nanosheet-based aerogel was successfully fabricated. The resulting 3D g-C 3 N 4 /PVA nanosheet-based aerogel has the advantages of high porosity and good hydrophobicity, making it a suitable material for use as an adsorbent. The 3D g-C 3 N 4 /PVA nanosheet-based aerogel can absorb various oils and organic solvents as high as 228−695 times its weight. Moreover, aerogel regeneration and recovery of oil can be achieved by cyclic distillation, squeezing, or combustion. After 40 cycles, the structure of 3D g-C 3 N 4 /PVA nanosheet-based aerogels are well kept and the adsorption capacity still retained 95, 93, and 95% by distillation, squeezing, and combustion, respectively. 3D g-C 3 N 4 /PVA nanosheet-based aerogel as an adsorbent has great potential in the application of oil/water separation for the removal of pollutants.

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“…The ink was prepared by simple liquid phase exfoliation by ultra‐sonication which is further deposited on the copper electrode for the sensor fabrication. Song et al 32 synthesized aerogels from MoS 2 /PVP by freeze drying method. The aerogels exhibited better hydrophobicity, adsorption capacity and recyclability.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl pyrrolidone mediated exfoliation of transition metal dichalcogenides: Comparative evaluation of exfoliated MoS₂ and WS₂ in epoxy toughening

Venu,

Jayan,

Joseph

et al. 2024

Polymer Composites

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Abstract2D materials are considered as an effective choice for the toughening of epoxy composites and enhancing their mechanical properties. Among the 2D materials, transition metal dichalcogenides, especially MoS2 and WS2, are getting wider attention due to their behavior analogous to graphene. The restacking and agglomeration tendency of TMDs due to weak Vander Waal's forces limits their application in epoxy toughening. To overcome the agglomeration issues, we are proposing a new approach for TMD exfoliation using Polyvinyl pyrrolidone (PVP); followed by its incorporation into the epoxy matrix. The exfoliation of TMDs using PVP is characterized by various techniques like FTIR, Raman spectroscopy, XRD analysis, and so forth. The enhanced mechanical properties of PVP exfoliated MoS2 and WS2 at a very low loading of 0.1 wt% are remarkable. The highly exfoliated WS2 showcases higher toughness than MoS2, with a 614% improvement in toughness and 43.5% improvement in tensile strength, respectively. The improvement in mechanical properties of these nanocomposites can be attributed to the good dispersion of PVP‐exfoliated TMDs in the epoxy matrix.Highlights Highlights the role of Polyvinyl pyrrolidone in exfoliating TMDs. The exfoliation efficiency of PVP is compared for MoS2 and WS2. The utilization of PVP exfoliated MoS2 and WS2 in epoxy toughening is portrayed. The effectiveness of epoxy composites in aerospace and coating applications is revealed.

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A three-dimensional porous MoS₂–PVP aerogel as a highly efficient and recyclable sorbent for oils and organic solvents

Abstract: Three-dimensional (3D) aerogels have attracted more and more attention in oil–water separation, due to their advantages of low density, high porosity, and large specific surface area.

Cited by 11 publications

References 75 publications

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Reusable Graphitic Carbon Nitride Nanosheet-Based Aerogels as Sorbents for Oils and Organic Solvents

Polyvinyl pyrrolidone mediated exfoliation of transition metal dichalcogenides: Comparative evaluation of exfoliated MoS₂ and WS₂ in epoxy toughening

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A three-dimensional porous MoS2–PVP aerogel as a highly efficient and recyclable sorbent for oils and organic solvents

Abstract: Three-dimensional (3D) aerogels have attracted more and more attention in oil–water separation, due to their advantages of low density, high porosity, and large specific surface area.

Cited by 11 publications

References 75 publications

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Preparation of hydrophilic poly(vinylidene fluoride) membrane by in‐situ grafting of N‐vinyl pyrrolidone via a reactive vapor induced phase separation procedure

Reusable Graphitic Carbon Nitride Nanosheet-Based Aerogels as Sorbents for Oils and Organic Solvents

Polyvinyl pyrrolidone mediated exfoliation of transition metal dichalcogenides: Comparative evaluation of exfoliated MoS2 and WS2 in epoxy toughening

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Product

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About

A three-dimensional porous MoS₂–PVP aerogel as a highly efficient and recyclable sorbent for oils and organic solvents

Polyvinyl pyrrolidone mediated exfoliation of transition metal dichalcogenides: Comparative evaluation of exfoliated MoS₂ and WS₂ in epoxy toughening