Synthesis and functionalisation of mesoporous materials for transparent coatings and organic dye adsorption

Nagappan, Saravanan; Kim, Bo Kyung; Yoo, Dae‐Geon; Jo, Nam‐Ju; Lee, Won‐Ki; Ha, Chang‐Sik

doi:10.1039/c8nj00591e

Cited by 11 publications

(18 citation statements)

References 46 publications

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“…The observed weight loss below 200 C was caused by the evaporation of the physically absorbed water or solvent. 29 SBA-15 showed a weight loss of 1% due to the physisorbed water moiety and condensation of silanol groups. The weight loss of TMSPM-modied SBA-15 was found to be 5%, attributed to the decomposition of the TMSPM.…”

Section: Structural Characterisation Of the Synthesised Catalystmentioning

confidence: 99%

Palladium nanoparticles-anchored dual-responsive SBA-15-PNIPAM/PMAA nanoreactor: a novel heterogeneous catalyst for a green Suzuki–Miyaura cross-coupling reaction

et al. 2020

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Section: Structural Characterisation Of the Synthesised Catalystmentioning

confidence: 99%

Palladium nanoparticles-anchored dual-responsive SBA-15-PNIPAM/PMAA nanoreactor: a novel heterogeneous catalyst for a green Suzuki–Miyaura cross-coupling reaction

et al. 2020

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“…The as-synthesized MCM before surfactant removal showed strong C–H asymmetric and symmetric stretching peaks at 2927, 2855, and 1477 cm –1 , indicating the presence of surfactant in the material (Figure 1A(a)). 11,12 The Si–O–Si peak in the material appeared at 1227, 1078, 797, and 457 cm –1 . Similarly, the Si–OH peak and surface-adsorbed water molecules appeared at 3409, 960, and 1640 cm –1 , respectively.…”

Section: Resultsmentioning

confidence: 97%

“…Recently, the authors’ group also functionalized MCM-41 with poly( N -isopropylacrylamide) (PNIPAM) and examined the adsorption behavior of rhodamine B (Rb) and Mb. 11 PNIPAM-MCM-41 showed a better adsorption of Rb dye than Mb. In addition, less adsorption of these dyes was observed on the unmodified MCM-41.…”

Section: Introductionmentioning

confidence: 89%

“…11−13 The main advantages of MSNs are the presence of a large surface area and pore volume, controlled pore diameter, uniform particle size, and easy surface functionalization for diverse applications. 11,12 The synthesis and functionalization of MSNs and their uses in the removal of aqueous pollutants and wastewater treatments were briefly reviewed in the literature. 14,15 Boukoussa et al studied a yellow dye (acid yellow 49, molecular weight 426.27 g/mol) adsorption by the calcined and uncalcined Al-MCM-41 (MCM-41; Mobil Composition of Matter No.…”

Section: Introductionmentioning

confidence: 99%

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Hexadecyltrimethylammonium Bromide Surfactant-Supported Silica Material for the Effective Adsorption of Metanil Yellow Dye

Nagappan

Jeon

2019

ACS Omega

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The adsorption behavior of an organic dye, metanil yellow (My), from water using micro–nano silica particles (MNSPs) was investigated. MCM-41-like (Mobil Composition of Matter No. 41) MNSPs were synthesized using tetraethoxy orthosilicate as a silica source and hexadecyltrimethylammonium bromide (CTAB) as a surfactant under basic conditions. Comparative studies were performed to assess the adsorption behaviors of the organic dye using the as-synthesized MCM-41 before the removal of CTAB and MCM-41, either after one, two, and three times of chemical etching or after calcination. My was adsorbed more effectively from water on the as-synthesized MCM-41 without the removal of the surfactant than on MCM-41 after the removal of the surfactant by chemical etching or calcination. In addition, MCM-41 after removing the surfactant by one-time chemical etching in the presence of hydrochloric acid also showed better adsorption of My from water than MCM-41 after removing the surfactant by further two and three times of chemical etching or calcination. For comparison, other kinds of dye molecules with different chemical structures such as methylene blue (Mb) and rhodamine B (Rb) were also used to check the possibility of adsorption of various dyes by the CTAB-supported MNSPs. To better understand the reason behind the adsorption phenomena, detailed studies on the kinetics and thermodynamics of adsorption of the MNSPs were performed. Excellent adsorption of My was observed at concentrations up to 100 mg L –1 at 25 °C, whereas the adsorption was lower at higher concentrations of the My dye. Furthermore, enhanced My dye adsorption was observed at higher concentrations by increasing the adsorption temperature. It can be concluded that the MNSPs exhibited efficient adsorption of My, when the MNSPs are used without the removal of the surfactant and any further modifications, suggesting that the surfactant played key roles in the effective adsorption of the anionic dye. The as-synthesized MCM-41 was, however, not a good adsorbent for cationic dyes such as Mb and Rb.

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“…In this work, after modification, hydrophobic PMHS chains can be covalently bonded onto the cotton fabrics. PMHS is transparent [49] and PMHS chains possess good flexibility [50]; therefore, PMHS modification will probably not affect the original appearance, softness, and wearing comfort of cotton fabrics. To further improve the resistance of cotton fabric to oil, a further addition reaction was applied to modify PMHS-modified cotton fabric with 1H,1H,2H-perfluoro-1-decene.…”

Section: Introductionmentioning

confidence: 99%

Highly Hydrophobic Cotton Fabrics Modified by Poly(methylhydrogen)siloxane and Fluorinated Olefin: Characterization and Applications

Lin

Liao

et al. 2020

Polymers

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Highly hydrophobic cotton fabrics were obtained with poly(methylhydrogen)siloxane (PMHS) and a further fluorinated olefin modification. The chemical structures and microstructures of PMHS-modified cotton fabrics were characterized, and application of the resultant cotton fabrics in stain resistance and oil–water separation was demonstrated. PMHS chains with very low surface energy were grafted onto cotton fabric by the dehydrogenation reaction between –Si–H of PMHS and –OH groups of cotton fabric at room temperature. The water contact angle of PMHS-modified cotton fabric was 141.7°, which provided the modified cotton fabric with good stain resistance to waterborne pollutants. The separation efficiency of diesel from water was higher than 92% for 20 repeatable separation cycles. A further improvement in stain resistance to oil was also demonstrated by a further addition reaction of 1H,1H,2H-perfluoro-1-decene with PMHS-modified cotton fabric.

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Synthesis and functionalisation of mesoporous materials for transparent coatings and organic dye adsorption

Abstract: The novel synthesis and functionalisation of mesoporous materials, which can be used to fabricate transparent hydrophobic coatings with temperature-sensitive surface properties, and also show excellent adsorption behavior to Rhodamine B dye in water.

Cited by 11 publications

References 46 publications

Palladium nanoparticles-anchored dual-responsive SBA-15-PNIPAM/PMAA nanoreactor: a novel heterogeneous catalyst for a green Suzuki–Miyaura cross-coupling reaction

Palladium nanoparticles-anchored dual-responsive SBA-15-PNIPAM/PMAA nanoreactor: a novel heterogeneous catalyst for a green Suzuki–Miyaura cross-coupling reaction

Hexadecyltrimethylammonium Bromide Surfactant-Supported Silica Material for the Effective Adsorption of Metanil Yellow Dye

Highly Hydrophobic Cotton Fabrics Modified by Poly(methylhydrogen)siloxane and Fluorinated Olefin: Characterization and Applications

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