Poly(4-vinylpyridine)-modified silica for efficient oil/water separation

Maaz, Mohamad; Elzein, Tamara; Dragoé, Diana; Bejjani, Alice; Jarroux, Nathalie; Poulard, Christophe; Barroca-Aubry, Nadine; Nsouli, B.; Roger, Philippe

doi:10.1007/s10853-018-2888-x

Cited by 14 publications

(18 citation statements)

References 31 publications

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“…XPS spectra of the N (1s) region (Figure 4, left) shows a remarkable increase of the nitrogen intensity after APTES functionalization process, deconvolution of the signal shows only one component at a binding energy of 400.5 eV, which is attributed to NH2 groups [43,44], due to the chemical composition of the APTES molecule. A deconvolution The recorded Absorbance at λ = 579 nm for the Ruhemann's purple were 0.60 and 0.66 respectively, which corresponds to concentrations of (C) APTES = 6.85 × 10 −4 M for APTES@SiO 2 (200 nm) and (C) APTES = 8.55 × 10 −4 M for APTES@SiO 2 (50 nm).…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

“…XPS spectra of the N (1s) region (Figure 4, left) shows a remarkable increase of the nitrogen intensity after APTES functionalization process, deconvolution of the signal shows only one component at a binding energy of 400.5 eV, which is attributed to NH 2 groups [43,44], due to the chemical composition of the APTES molecule. A deconvolution study of the C 1s peak (Figure 4, right) shows three components for both cases, the first component has a binding energy (B.E.)…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

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APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

et al. 2021

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In this work, we have described the characterization of hybrid silica nanoparticles of 50 nm size, showing outstanding size homogeneity, a large surface area, and remarkable CO2 sorption/desorption capabilities. A wide battery of techniques was conducted ranging from spectroscopies such as: UV-Vis and IR, to microscopies (SEM, AFM) and CO2 sorption/desorption isotherms, thus with the purpose of the full characterization of the material. The bare SiO2 (50 nm) nanoparticles modified with 3-aminopropyl (triethoxysilane), APTES@SiO2 (50 nm), show a remarkable CO2 sequestration enhancement compared to the pristine material (0.57 vs. 0.80 mmol/g respectively at 50 °C). Furthermore, when comparing them to their 200 nm size counterparts (SiO2 (200 nm) and APTES@SiO2 (200 nm)), there is a marked CO2 capture increment as a consequence of their significantly larger micropore volume (0.25 cm3/g). Additionally, ideal absorbed solution theory (IAST) was conducted to determine the CO2/N2 selectivity at 25 and 50 °C of the four materials of study, which turned out to be >70, being in the range of performance of the most efficient microporous materials reported to date, even surpassing those based on silica.

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Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

“…XPS spectra of the N (1s) region (Figure 4, left) shows a remarkable increase of the nitrogen intensity after APTES functionalization process, deconvolution of the signal shows only one component at a binding energy of 400.5 eV, which is attributed to NH 2 groups [43,44], due to the chemical composition of the APTES molecule. A deconvolution study of the C 1s peak (Figure 4, right) shows three components for both cases, the first component has a binding energy (B.E.)…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

et al. 2021

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“…The modification of BPS is to functionalize the surface of the sand with bromoalkyl groups via silanization, which serves as a binder for subsequent grafting of P4VP on its surface (Figure e). Then, the P4VP polymer was grafted onto the surface of the previously silanized Sand@SiO 2 through the quaternization reaction between the bromoalkyl groups of BPS and the pyridyl groups of P4VP by heating under vacuum at 150 °C for 12 h. The grafted P4VP endows the sand surface with pH-responsive wettability. − , …”

Section: Resultsmentioning

confidence: 99%

“…Then, the P4VP polymer was grafted onto the surface of the previously silanized Sand@SiO 2 through the quaternization reaction between the bromoalkyl groups of BPS and the pyridyl groups of P4VP by heating under vacuum at 150 °C for 12 h. The grafted P4VP endows the sand surface with pH-responsive wettability. [18][19][20]24 To confirm the successful chemical modifications of the sand, its surface was analyzed by XPS. The raw sand shows significant Si and O peaks around 100 eV (Si 2p), 150 eV (Si 2 s), and 530 eV (O 1 s), with possible minor C 1 s contaminants at around 285 eV (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

“…Owing to its natural superhydrophilic and underwater superoleophobic properties, the raw sand carries the merits of excellent water absorption and ultralow oil adhesion capability that are beneficial for oil/water separation. − In addition to low materials and possible operating cost, the benefits of using sand as the oil/water separation material also include their tunable operating scales that can be easily controlled by adjusting the amount of sand used. , Furthermore, considering the recyclability and versatility requirements for oil–water separation processes in practical applications, it is highly desirable to have separation materials with controllable surface wettability, which can be modulated by external stimuli. ,, Using responsive materials with switchable wettability, absorbed oil can be easily recovered, and the smart materials can be reused in a sustainable and cost-effective manner for the oily wastewater treatment or oil spill cleanup . Among them, the pH-responsive ones are attractive because of their fast wettability switch triggered by the changes of pH. − The developed materials possess switchable oil wettability under different pHs, which can be used for controllable oil/water separation processes. Nevertheless, smart sand has never been developed for oil/water separation.…”

Section: Introductionmentioning

confidence: 99%

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Smart Sand by Surface Engineering: Toward Controllable Oil/Water Separation

Chang

Ong

Shi

et al. 2021

Ind. Eng. Chem. Res.

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Sand, an abundant resource from the nature, is a promising candidate for oil/water separation. Herein, raw sand was designed with switchable surface wettability to enable recyclability and versatility in practical oil/water separation. The "smart" sand was fabricated by grafting pH-responsive poly(4vinylpyridine) (P4VP) and oleophilic/hydrophobic octadecyltrimethoxysilane (OTS) onto its surface. The decorated sand can be used as the oil sorbent for controllable oil sorption and desorption in response to different pHs, as well as a filter to selectively separate either oil or water on demand. This novel design offers an intelligent, low-cost, large-scale, and highly efficient route to potentially settle the issues of industrial oily wastewater and oil spill.

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3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

Yang

Ren

Zhou

et al. 2023

Adv Funct Materials

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Smart surfaces with responsive wettability are unstable, and depend upon continuous external stimuli, which limits their widespread application in switchable oil/water emulsions separations. In this study, a Ti‐based 3D porous structure (SLM‐3DTi) is printed using advanced selective laser melting (SLM) technology for the switchable separation of oil/water emulsion. With the assistance of the computer program, porous structure and re‐entrant texture can be easily designed and printed in one step. Without any continuous external stimulus, the wettability of SLM‐3DTi can be reversibly switched between underwater superoleophobicity and underoil superhydrophobicity simply by drying and washing cycles. The SLM‐3DTi achieves switchable surfactant‐stabilized oil‐in‐water emulsion (SSE(o/w)) and surfactants‐stabilized water‐in‐oil emulsion (SSE(w/o)) separation with purity above 99.8% at a flux of more than 2000 L m−2 h−1. In addition, the re‐entrant texture of the SLM‐3DTi surface is formed with the partially melting powder particles on the part contour, which has much stronger mechanical durability than any binder. Furthermore, SLM‐3DTi has excellent corrosion resistance due to the material properties of Ti. More importantly, based on the visualization analysis of the simulation, the mechanism of SLM‐3DTi emulsion separation is further elucidated. Therefore, SLM‐3DTi has broad practical application potential for high‐flux, high‐purity, and switchable oil/water emulsion separation.

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Poly(4-vinylpyridine)-modified silica for efficient oil/water separation

Cited by 14 publications

References 31 publications

APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

APTES-Based Silica Nanoparticles as a Potential Modifier for the Selective Sequestration of CO2 Gas Molecules

Smart Sand by Surface Engineering: Toward Controllable Oil/Water Separation

3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

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