Sol–gel synthesis of monolithic materials with hierarchical porosity

2016 ◽  
Vol 45 (12) ◽  
pp. 3377-3399 ◽  
Author(s):  
A. Feinle ◽  
M. S. Elsaesser ◽  
N. Hüsing
Keyword(s):  
Porous Materials ◽  
Sol Gel ◽  
Length Scales ◽  
Hierarchical Porosity ◽  
High Interest ◽  
Wide Range ◽  
Synthetic Routes ◽  
Sol Gel Synthesis

The development of synthetic routes to porous materials containing multiple, discrete sets of pores having disparate length scales is of high interest for a wide range of applications.

ChemInform Abstract: Sol-Gel Synthesis of Monolithic Materials with Hierarchical Porosity

ChemInform ◽  
2016 ◽  
Vol 47 (30) ◽  
Author(s):  
Andrea Feinle ◽  
Michael S. Elsaesser ◽  
Nicola Huesing
Keyword(s):  
Sol Gel ◽  
Hierarchical Porosity ◽  
Sol Gel Synthesis

scholarly journals Synthesis of Core–Double Shell Nylon-ZnO/Polypyrrole Electrospun Nanofibers

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2241
Author(s):  
Mihaela Beregoi ◽  
Nicoleta Preda ◽  
Andreea Costas ◽  
Monica Enculescu ◽  
Raluca Negrea ◽  
...  
Keyword(s):  
Sol Gel ◽  
Electrospun Nanofibers ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
Zno Film ◽  
X Ray ◽  
Wide Range ◽  
Sol Gel Process ◽  
Sol Gel Synthesis ◽  
Inorganic Layers

Core–double shell nylon-ZnO/polypyrrole electrospun nanofibers were fabricated by combining three straightforward methods (electrospinning, sol–gel synthesis and electrodeposition). The hybrid fibrous organic–inorganic nanocomposite was obtained starting from freestanding nylon 6/6 nanofibers obtained through electrospinning. Nylon meshes were functionalized with a very thin, continuous ZnO film by a sol–gel process and thermally treated in order to increase its crystallinity. Further, the ZnO coated networks were used as a working electrode for the electrochemical deposition of a very thin, homogenous polypyrrole layer. X-ray diffraction measurements were employed for characterizing the ZnO structures while spectroscopic techniques such as FTIR and Raman were employed for describing the polypyrrole layer. An elemental analysis was performed through X-ray microanalysis, confirming the expected double shell structure. A detailed micromorphological characterization through FESEM and TEM assays evidenced the deposition of both organic and inorganic layers. Highly transparent, flexible due to the presence of the polymer core and embedding a semiconducting heterojunction, such materials can be easily tailored and integrated in functional platforms with a wide range of applications.

Self-Assembly of Layered Aluminum Silsesquioxanes: Clay-Like Organic-Inorganic Nanocomposites

1996 ◽  
Vol 457 ◽  
Author(s):  
L. Ukrainczyk ◽  
R. A. Bellman ◽  
K. A. Smith ◽  
J. E. Boyd
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Layered Silicate ◽  
Wide Range ◽  
Inorganic Nanocomposites ◽  
Temperature And Pressure ◽  
Xrd Patterns ◽  
Degree Of Condensation ◽  
Inorganic Framework ◽  
Sol Gel Synthesis

ABSTRACTA series of layered silicate-like structures with a wide range of Si/AI ratios that have an organic functionality directly bonded to the structural Si atom by Si-C bond were prepared by template sol-gel synthesis at room temperature and pressure. XRD patterns indicate that organic functionalities in the interlayers are in paraffin-like arrangement and do not interpenetrate. Structural ordering is primarily governed by the assembly of the organic functionalities into lamellar micelles. Nanocomposites were studied by solid state 29Si and 27AI NMR to determine the degree of condensation of inorganic framework. The results indicate that Si-O-Al linkages do not form in gels precipitated at low pH. Stable Si-O-Al linkages form when pH of the precipitates is raised. The highest degree of Si-O-Al bonding is obtained when Al solutions are prehydrolyzed prior to the addition of silane.

scholarly journals Applications for Sol-Gel-Derived Materials in Medicine and Biology

2000 ◽  
Vol 5 (1) ◽  
pp. 52-57
Author(s):  
John F. Conroy ◽  
Mary E. Power ◽  
Pamela M. Norris
Keyword(s):  
Low Temperature ◽  
Porous Materials ◽  
Sol Gel ◽  
Coupling Agents ◽  
Microstructural Properties ◽  
Production Route ◽  
Wide Range ◽  
Potential Applications

Sol-gel chemistry provides a novel production route for ceramics and composites that have a variety of applications in medicine, biology, and biochemistry. Advantages of sol-gel-derived materials in these applications include simple, low temperature production routes that are capable of achieving temperature, chemical, and radiation-inert porous materials with a wide range of structural and microstructural properties. Furthermore, sol-gel-derived materials display remarkable compatibility with biomacromolecules and are conveniently functionalized with a variety of coupling agents. The properties of these materials and their present and potential applications in medicine and biology are reviewed.

scholarly journals Review on Sol-Gel Synthesis of Perovskite and Oxide Nanomaterials

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 275
Author(s):  
Daniel Navas ◽  
Sandra Fuentes ◽  
Alejandro Castro-Alvarez ◽  
Emigdio Chavez-Angel
Keyword(s):  
Time Pressure ◽  
Low Cost ◽  
Sol Gel ◽  
Reaction Times ◽  
Vanadium Oxides ◽  
Molecular Structures ◽  
Working Temperature ◽  
Wide Range ◽  
Sol Gel Synthesis ◽  
Wide Family

Sol-Gel is a low cost, well-established and flexible synthetic route to produce a wide range of micro- and nanostructures. Small variations in pH, temperature, precursors, time, pressure, atmosphere, among others, can lead to a wide family of compounds that share the same molecular structures. In this work, we present a general review of the synthesis of LaMnO3, SrTiO3, BaTiO3 perovskites and zinc vanadium oxides nanostructures based on Sol-Gel method. We discuss how small changes in the parameters of the synthesis can modify the morphology, shape, size, homogeneity, aggregation, among others, of the products. We also discuss the different precursors, solvents, working temperature, reaction times used throughout the synthesis. In the last section, we present novel uses of Sol-Gel with organic materials with emphasis on carbon-based compounds. All with a perspective to improve the method for future applications in different technological fields.

Inorganic-organic Hybrid Materials for Real 3-D Sub-νm Lithography

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Houbertz ◽  
J. Schulz ◽  
L. Fröhlich ◽  
G. Domann ◽  
M. Popall ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Sol Gel ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Hybrid Polymer ◽  
Organic Hybrid ◽  
Two Photon ◽  
Applied Technology ◽  
Scale Structures ◽  
Sol Gel Synthesis

AbstractReal 3-D sub-νm lithography was performed with two-photon polymerization (2PP) using inorganic-organic hybrid polymer (ORMOCER®) resins. The hybrid polymers were synthesized by hydrolysis/polycondensation reactions (modified sol-gel synthesis) which allows one to tailor their material properties towards the respective applications, i.e., dielectrics, optics or passivation. Due to their photosensitive organic functionalities, ORMOCER®s can be patterned by conventional photo-lithography as well as by femtosecond laser pulses at 780 nm. This results in polymerized (solid) structures where the non-polymerized parts can be removed by conventional developers.ORMOCER® structures as small as 200 nm or even below were generated by 2PP of the resins using femtosecond laser pulses. It is demonstrated that ORMOCER®s have the potential to be used in components or devices built up by nm-scale structures such as, e.g., photonic crystals. Aspects of the materials in conjunction to the applied technology are discussed.

Sol-Gel Synthesis, Structure and Optical Properties of Nickel-Manganese Ferrites

2019 ◽  
Vol 11 (3) ◽  
pp. 03021-1-03021-5
Author(s):  
V. S. Bushkova ◽  
◽  
I. P. Yaremiy ◽  
B. K. Ostafiychuk ◽  
N. I. Riznychuk ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Sol Gel Synthesis ◽  
Nickel Manganese

1,4-Diazepines: A Review on Synthesis, Reactions and Biological Significance

2019 ◽  
Vol 16 (5) ◽  
pp. 709-729 ◽  
Author(s):  
Muhammad A. Rashid ◽  
Aisha Ashraf ◽  
Sahibzada S. Rehman ◽  
Shaukat A. Shahid ◽  
Adeel Mahmood ◽  
...  
Keyword(s):  
Biological Activities ◽  
Biological Significance ◽  
Biological Evaluation ◽  
Wide Range ◽  
Pharmaceutical Industries ◽  
Biological Aspects ◽  
Synthetic Routes ◽  
Biological Attributes ◽  
Synthesis Reactions ◽  
Potential Use

Background:1,4-Diazepines are two nitrogen containing seven membered heterocyclic compounds and associated with a wide range of biological activities. Due to its medicinal importance, scientists are actively involved in the synthesis, reactions and biological evaluation of 1,4-diazepines since number of decades.Objective:The primary purpose of this review is to discuss the synthetic schemes and reactivity of 1,4- diazepines. This article also describes biological aspects of 1,4-diazepine derivatives, that can be usefully exploited for the pharmaceutical sector.Conclusion:This review summarizes the abundant literature on synthetic routes, chemical reactions and biological attributes of 1,4-diazepine derivatives. We concluded that 1,4-diazepines have significant importance due to their biological activities like antipsychotic, anxiolytic, anthelmintic, anticonvulsant, antibacterial, antifungal and anticancer. 1,4-diazepine derivatives with significant biological activities could be explored for potential use in the pharmaceutical industries.

Sol-Gel Synthesis of Nano-Scale, End-Member Albite Feldspar (NaAlSi3O8)

2021 ◽  
Author(s):  
L.M. Anovitz ◽  
A. Affolter ◽  
M.C. Cheshire ◽  
A.J. Rondinone ◽  
Lawrence F. Allard
Keyword(s):  
Sol Gel ◽  
Nano Scale ◽  
Sol Gel Synthesis
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