Rapid Microwave-Assisted Synthesis of Organo-Modified Nanostructured Silica Coatings with Tunable Water-Repellence Properties DOI Open Access
Ioana Cătălina Gȋfu, Bogdan Trică,

Claudia Mihaela Ninciuleanu

et al.

Coatings, Journal Year: 2021, Volume and Issue: 11(11), P. 1319 - 1319

Published: Oct. 29, 2021

A simple method to fabricate organo-modified silane coatings for water-repellent surface modification was proposed, by using a microwave sol-gel synthesis of hybrid materials. Low-cost fluorine-free tetraethoxysilane (TEOS) and dodecyltriethoxysilane (DDTES) were used as derivatives. The silica prepared the drop-casting characterized UV-VIS, FTIR spectroscopy, AFM SEM microscopy. morphology film show existence submicrometer scale roughness due aggregation modified nanoparticles. Contact angles water diiodomethane on surfaces with nanostructured determined in order assess hydrophobic oleophobic properties. TEOS/DDTES ratio proved be crucial factor tuning wettability results suggest that significant increase hydrophobicity could achieved non-fluorinated cost-effective nanomaterials produced rapid ecofriendly method.

Language: Английский

Silica aerogels modified with vinyl, epoxide, methacrylate moieties for the removal of ciprofloxacin by adsorption from water DOI Creative Commons
Selay Sert Çok, Fatoş Koç, Adél Len

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129112 - 129112

Published: Aug. 6, 2024

Water pollution caused by antibiotic effluents, particularly ciprofloxacin is a growing environmental concern. To address this problem, silica aerogels containing vinyl, epoxide, or methacrylate organic functionalities were synthesized through facile sol–gel synthesis under ambient conditions and employed as adsorbents in study. The physicochemical structural features of the materials characterized using conventional complementary techniques. Structural characterization confirmed successful chemical functionalization surface for all samples. Similar to pristine aerogel, vinyl-functionalized aerogel displayed typical mesoporous network, whereas epoxide dominantly macroporous structures. Batchwise sorption experiments performed different operating conditions. results equilibrium kinetic adsorption studies showed excellent alignment with Langmuir isotherm pseudo-second-order models, respectively. Under optimum (C0 = 100 mg/L, mads/Vsoln 0.5, pH=6, t 90 min), capacities onto methacrylate-modified 62.7, 45.8 47.8 mg/g, Despite differences at micro- meso- macrostructure level, obtaining similar adsorptive performances confirms that mechanism not only relied on pore filling but also controlled molecular interactions. exhibited repetable performance least six cycles.

Language: Английский

Citations

10
Magnetic hyperthermia mediated multimodal therapy for tumors: Construction and potential applications of iron-based nanoplatforms DOI
Yifei Wang,

Jianing Chu,

X Wang

et al.

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 535, P. 216575 - 216575

Published: March 18, 2025

Language: Английский

Citations

0
The Methyl Functionality of Monolithic Silica Xerogels Synthesized via the Co-Gelation Approach Combined with Surface Silylation DOI Creative Commons
Selay Sert Çok, Fatoş Koç, Zoltán Dudás

et al.

Gels, Journal Year: 2022, Volume and Issue: 9(1), P. 33 - 33

Published: Dec. 30, 2022

The present research aims to investigate the chemical and morphological properties of methylated silica xerogels produced via co-gelation approach combined with surface silylation. In sol–gel synthesis, methyltrimethoxysilane (MTMS) tetraethylorthosilicate (TEOS) were utilized as precursors trimethylchlorosilane (TMCS) served a silylating agent. Structural changes observed depending on MTMS/TEOS molar ratio post-synthesis-performed silylation xerogels. Post-synthesis plays critical role in exchanging silanols methyl groups, preserving monolithic form. structural followed by SEM, 29Si-MAS-NMR, FTIR spectroscopy, nitrogen porosimetry, contact angle measurements. results have shown significant variations especially MTMS content. With an increasing content, morphology samples has changed from micro/mesoporous texture meso/macroporous texture. A higher degree substitution been achieved for silylated both confirmed 29Si-NMR results. On other hand, only high content could preserve their integrity after evaporative drying, all exhibited hydrophobicity θ > 140°.

Language: Английский

Citations

12
Performance of Zr-Based Metal–Organic Framework Materials as In Vitro Systems for the Oral Delivery of Captopril and Ibuprofen DOI Open Access
Carmen Creţu,

Roxana Nicola,

Sorin-Alin Marinescu

et al.

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(18), P. 13887 - 13887

Published: Sept. 9, 2023

Zr-based metal-organic framework materials (Zr-MOFs) with increased specific surface area and pore volume were obtained using chemical (two materials, Zr-MOF1 Zr-MOF3) solvothermal (Zr-MOF2) synthesis methods investigated via FT-IR spectroscopy, TGA, SANS, PXRD, SEM methods. The difference between Zr-MOF3 lies in the addition of reactants during synthesis. Nitrogen porosimetry data indicated presence pores average dimensions ~4 nm; size Zr-MOF nanocrystals was suggested to be approximately 30 nm. patterns through PXRD characterized by similar features that point well-crystallized phases for UIO-66 type materials; also revealed composed small agglomerate crystals. Thermogravimetric analysis both had two linker deficiencies per Zr6 formula unit. Captopril ibuprofen loading release experiments different buffered solutions performed frameworks as drug carriers envisaged controlled release. demonstrated enhanced drug-loading capacity showed relatively good results delivery. cumulative percentage phosphate-buffered solution at pH 7.4 higher than 1.2. rate could changing releasing solution. Different captopril behaviors observed when a permeable dialysis membrane.

Language: Английский

Citations

7
The role of surface and structural properties on the adsorptive behavior of vinyl-methyl decorated silica aerogel-like hybrids for oil/organic solvent clean-up practices DOI
Selay Sert Çok, Fatoş Koç, Adél Len

et al.

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 334, P. 125958 - 125958

Published: Dec. 13, 2023

Language: Английский

Citations

7
Nitrogen doped carbonaceous materials as platinum free cathode electrocatalysts for oxygen reduction reaction (ORR) DOI Creative Commons
Ilgar Ayyubov, Emı́lia Tálas, Camelia Berghian‐Grosan

et al.

Reaction Kinetics Mechanisms and Catalysis, Journal Year: 2022, Volume and Issue: 136(1), P. 125 - 147

Published: Dec. 8, 2022

Abstract Comparison of physicochemical properties and electrocatalytic behavior different N-doped carbonaceous materials as potential catalysts for oxygen reduction reaction (ORR) was attended. Ball-milling graphite with melamine solvothermal treatment oxide, graphene nanoplatelets (GNP) ammonia were used preparation methods. Elemental analysis N 2 physisorption measurements revealed the synthesis strongly morphological parameters. Contact angle proved that all three samples had good wettability properties. According to XRD data Raman spectra a higher nitrogen concentration corresponded smaller size crystallites material. Surface total content determined by XPS bulk assessed elemental close, indicating homogenous inclusion in samples. Rotating disc electrode tests showed these weremuch less active acidic medium than an alkaline environment. Although presence in-plane species is regarded be advantageous ORR activity, no particular correlation found systems any type species. Koutecky–Levich analysis, both N-containing reference Pt/C catalyst displayed typical one-step, four-electron route. Both ball-milled sample high N-content but low SSA solvothermally synthesized N-GNP significant activity. It could concluded beside other parameters such SSA, pore structure, structural defects, also essential achieving

Language: Английский

Citations

7
Preparation of Quaternary Ammonium Separation Material based on Coupling Agent Chloromethyl Trimethoxysilane (KH-150) and Its Adsorption and Separation Properties in Studies of Th(IV) DOI Creative Commons
Zheng Wang,

Xique Wu,

Meichen Liu

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(13), P. 3031 - 3031

Published: June 26, 2024

In this research, the authors studied synthesis of a silicon-based quaternary ammonium material based on coupling agent chloromethyl trimethoxysilane (KH-150) as well its adsorption and separation properties for Th(IV). Using FTIR NMR methods, materials before after grafting were characterized to determine spatial structure functional groups in SG-CTSQ. Based this, group amount (0.537 mmol·g−1) quaternization rate (83.6%) accurately calculated using TGA weight loss XPS. experiment, four with different amounts showed degrees variation their Th(IV) changes HNO3 concentration NO3− but all exhibited tendency toward anion exchange. The thermodynamic kinetic experimental results demonstrated that low (SG-CTSQ1 SG-CTSQ2) tended physical Th(IV), while other two chemical adsorption. mechanism experiment further proved achieve through an anion-exchange reaction. Chromatographic column experiments SG-CTSQ has good performance U-Th separation, decontamination factor uranium up 385.1, removal can reach 99.75%.

Language: Английский

Citations

1
New phthalocyanine-hybrid glass materials for optoelectronics – Photostability and temperature-dependent optical properties DOI
Barbara Popanda, Jarosław Grolik, Anna Mrozik

et al.

Dyes and Pigments, Journal Year: 2024, Volume and Issue: 231, P. 112393 - 112393

Published: Aug. 8, 2024

Language: Английский

Citations

1
Mesoporous Aerogel Microparticles Injected into the Abdominal Cavity of Mice Accumulate in Parathymic Lymph Nodes DOI Open Access
Gábor Király,

John Chinonso Egu,

Zoltán Hargitai

et al.

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(18), P. 9756 - 9756

Published: Sept. 9, 2021

Mesoporous aerogel microparticles are promising drug delivery systems. However, their in vivo biodistribution pathways and health effects unknown. Suspensions of fluorescein-labeled silica-gelatin hybrid were injected into the peritoneum (abdominal cavity) healthy mice concentrations 52 104 mg kg

Language: Английский

Citations

7
Synthesis of silica aerogels by sol-gel method and its use as pharmaceutical carriers DOI Creative Commons
Fatemeh Mirjalili, Sahebali Manafi,

Seyed Rahim Kiahosseini

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 30, 2024

Abstract Today, researchers are looking for non-toxic matrices that provide preferential release, or specifically controlled by loading drugs in these areas. For this reason, areas such as high specific surface silica aerogels considered, which can increase the absorption up to 5 times and a result, one-fifth of usual amount be used drug dose. In research, it was tried obtain most desirable method aerogel production with available economical process examining sol-gel method. The results scanning electron microscope confirmed nano porosities. X-ray showed produced had an amorphous structure did not have crystalline structure. addition, replace anti-inflammatory improved solubility body. As during study, porous porosity, after pharmaceutical field, structural morphological properties were changed could improve process.

Language: Английский

Citations

0