Silica- and germania-based dual-ligand sol-gel organic-inorganic hybrid sorbents combining superhydrophobicity and π-π interaction. The role of inorganic substrate in sol-gel capillary microextraction

Seyyal, Emre; Malik, Abdul

doi:10.1016/j.aca.2017.02.031

Cited by 9 publications

(4 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the data is not presented. The as-prepared GeO 2 colloids exhibit broad and relatively weak peaks that are consistent with the presence of nanoscale polycrystalline domains . Evidence of polycrystalline GeO 2 is detected in the XRD pattern of the extracted core–shell particles, as noted by the appearance of the (110) and (011) peaks.…”

Section: Resultsmentioning

confidence: 63%

“…The asprepared GeO 2 colloids exhibit broad and relatively weak peaks that are consistent with the presence of nanoscale polycrystalline domains. 33 Evidence of polycrystalline GeO 2 is detected in the XRD pattern of the extracted core−shell particles, as noted by the appearance of the (110) and (011) peaks. Altogether, structural characterization confirms the formation of hybrid GeO 2 colloids encapsulated with the chemically bound SiO 2 .…”

Section: Resultsmentioning

confidence: 92%

“…In contrast to sol–gel-derived SiO 2 , which is well known to form stable, spherical, amorphous colloidal suspensions, or sols, reports of sol–gel-derived GeO 2 sols describe the formation of crystalline and polycrystalline materials. , The tendency for GeO 2 to form crystalline domains can be attributed to the presence of water in the solution, which is critical for alkoxide hydrolysis but also produces favorable chemical kinetics through a chemical dissolution pathway that promotes crystallization from GeO 2 glass, even at ambient conditions . Aware of these challenges, a GeO 2 sol formulation was developed from a systematic study of TEOG-derived sols by varying reaction conditions, such as water stoichiometry, use of a catalyst, and reaction temperature.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Silica-Encapsulated Germania Colloids as 3D-Printable Glass Precursors

et al. 2022

View full text Add to dashboard Cite

Core–shell colloids make attractive feedstocks for three-dimensional (3D) printing mixed oxide glass materials because they enable synthetic control of precursor dimensions and compositions, improving glass fabrication precision. Toward that end, we report the design and use of core–shell germania–silica (GeO 2 –SiO 2 ) colloids and their use as precursors to fabricate GeO 2 –SiO 2 glass monoliths by direct ink write (DIW) 3D printing. By this method, GeO 2 colloids were prepared in solution using sol–gel chemistry and formed oblong, raspberry-like agglomerates with ∼15 nm diameter primary particles that were predominantly amorphous but contained polycrystalline domains. An ∼15 nm encapsulating SiO 2 shell layer was formed directly on the GeO 2 core agglomerates to form core–shell GeO 2 –SiO 2 colloids. For glass 3D printing, GeO 2 –SiO 2 colloidal sols were formulated into a viscous ink by solvent exchange, printed into monoliths by DIW additive manufacturing, and sintered to transparent glasses. Characterization of the glass components demonstrates that the core–shell GeO 2 –SiO 2 presents a feasible route to prepare quality, optically transparent low wt % GeO 2 –SiO 2 glasses by DIW printing. Additionally, the results offer a novel, hybrid colloid approach to fabricating 3D-printed Ge-doped silica glass.

show abstract

Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Silica-Encapsulated Germania Colloids as 3D-Printable Glass Precursors

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The disappearance of C═O stretch absorption at 1635 cm −1 and intense adsorption of C═N stretch suggest the accomplishment of the Schiff base reactions. However, the SiOC stretching adsorption at 1281, 1344, and 1456 cm −1 indicates that the hydrolysis of methoxy groups in APTMS and development of the silica phase in the PI matrix is a much slower process than the formation of imine 40 . These results explain the phenomena that the gels are soft initially and turn hard during the curing process.…”

Section: Resultsmentioning

confidence: 93%

In situ mechanical reinforcement of polyimine vitrimer via bioinspired crosslink mineralization

Liang

Feng

Jiang

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polyimines (PI) are vitrimer materials with unique Schiff base dynamic covalent chemistry. Various inorganic micro or nano fillers have been used to enhance the mechanical properties of PI materials. Inspired by natural biomineralization, a novel polyimine vitrimer composite is designed and prepared via a one‐pot synthesis. Briefly, diethylenetriamine and glutaraldehyde are used as the monomers of the PI matrix. Then a silica precursor, (3‐aminopropyl)trimethoxy silane is employed to develop silica nanoparticles within the formed PI matrix. The in situ generated silica nanoparticles with amine groups could act as the enhancing fillers and the crosslinkers in the artificial biomineralized silica reinforced polyimine composites. The optimized hybrid materials possessed enhanced mechanical properties, heat‐driven malleability, and limited recycling ability. Notably, the silica content (11.7%) is crucial to the mechanical performance of the PI matrix. This method may help to pave a new avenue on the simple fabrication of hybrid composites.

show abstract

Monodisperse fusiform microporous silica formed by evaporation-induced self assembly of polyamino acid copolymer template

Feng

Shao

et al. 2021

J Polym Res

View full text Add to dashboard Cite

Silica- and germania-based dual-ligand sol-gel organic-inorganic hybrid sorbents combining superhydrophobicity and π-π interaction. The role of inorganic substrate in sol-gel capillary microextraction

Cited by 9 publications

References 69 publications

Silica-Encapsulated Germania Colloids as 3D-Printable Glass Precursors

Silica-Encapsulated Germania Colloids as 3D-Printable Glass Precursors

In situ mechanical reinforcement of polyimine vitrimer via bioinspired crosslink mineralization

Monodisperse fusiform microporous silica formed by evaporation-induced self assembly of polyamino acid copolymer template

Contact Info

Product

Resources

About