Sol–gel synthesis of 2-dimensional TiO2: self-assembly of Ti–oxoalkoxy–acetate complexes by carboxylate ligand directed condensation

2021 ◽  
Author(s):  
Ruohong Sui ◽  
Connor E. Deering ◽  
Rohen Prinsloo ◽  
Christopher B. Lavery ◽  
Nancy Chou ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Carboxylate Ligand ◽  
Sol Gel Synthesis ◽  
First Time

2-Dimensional TiO2 is synthesized for the first time by a sol–gel self-assembly of Ti–oxoalkoxy–acetate complexes.

scholarly journals A mesostructured hybrid CTA–silica carrier for curcumin delivery

2020 ◽  
Vol 96 (1) ◽  
pp. 236-246
Author(s):  
Marta Gallo ◽  
Fabio Giudice ◽  
Mauro Banchero ◽  
Silvia Ronchetti ◽  
Luigi Manna ◽  
...  
Keyword(s):  
Water Solubility ◽  
Uv Spectroscopy ◽  
Sol Gel ◽  
Topical Administration ◽  
Release Mechanism ◽  
Active Principle ◽  
One Pot ◽  
Drug Release Mechanism ◽  
Sol Gel Synthesis ◽  
First Time

Abstract Curcumin is a natural active principle with antioxidant, antibacterial and anti-inflammatory properties. Its use is limited by a low water solubility and fast degradation rate, which hinder its bioavailability. To overcome this problem, curcumin can be delivered through a carrier, which protects the drug molecule and enhances its pharmacological effects. The present work proposes a simple one-pot sol–gel synthesis to obtain a hybrid carrier for curcumin delivery. The hybrid consists of a mesostructured matrix of amorphous silica, which stabilizes the carrier, and hexadecyltrimethylammonium (CTA), a surfactant where curcumin is dissolved to increase its water solubility. The carrier was characterized in terms of morphology (FESEM), physicochemical properties (XRD, FTIR, UV spectroscopy) and release capability in pseudo-physiological solutions. Results show that curcumin molecules were entrapped, for the first time, in a silica-surfactant mesostructured hybrid carrier. The hybrid carrier successfully released curcumin in artificial sweat and in a phosphate buffer saline solution, so confirming its efficacy in increasing curcumin water solubility. The proposed drug release mechanism relies on the degradation of the carrier, which involves the concurrent release of silicon. This suggests strong potentialities for topical administration applications, since curcumin is effective against many dermal diseases while silicon is beneficial to the skin.

scholarly journals Self-assembly of iron oxide precursor micelles driven by magnetic stirring time in sol–gel coatings

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17571-17580 ◽  
Author(s):  
J. López-Sánchez ◽  
A. Serrano ◽  
A. del Campo ◽  
M. Abuín ◽  
E. Salas-Colera ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Self Assembly ◽  
Sol Gel ◽  
Oxide Precursor ◽  
Magnetic Stirring ◽  
Stirring Time ◽  
Self Assembled ◽  
Sol Gel Synthesis

Sol–gel synthesis of self-assembled iron oxide precursor micelles.

scholarly journals Ga-Substituted Cobalt-Chromium Spinels as Ceramic Pigments Produced by Sol–Gel Synthesis

Crystals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1078
Author(s):  
Egle Grazenaite ◽  
Edita Garskaite ◽  
Zivile Stankeviciute ◽  
Eva Raudonyte-Svirbutaviciene ◽  
Aleksej Zarkov ◽  
...  
Keyword(s):  
Phase Composition ◽  
Crystallite Size ◽  
Single Phase ◽  
Sol Gel ◽  
Ceramic Pigments ◽  
Blue Color ◽  
Cobalt Chromium ◽  
Light Blue ◽  
Sol Gel Synthesis ◽  
First Time

For the first time to the best of our knowledge, cobalt-chromium spinels CoCr2−xGaxO4 with different amounts of gallium (x = 0–2 with a step of 0.5) were synthesized via the aqueous sol–gel route as ceramic pigments. The phase composition, crystallite size, morphological features, and color parameters of new compositions and their corresponding ceramic glazes were investigated using XRD, CIELab, SEM, and optical microscopy. It was demonstrated that the formation of single-phase CoCr2−xGaxO4 samples was problematic. Full substitution of Cr3+ by Ga3+ ion in the spinel resulted in the formation of light blue powders, which yielded violetish blue color for the corresponding ceramic glaze.

Sol–gel synthesis, structural and electrical properties of Li2CoSiO4 cathode material

2014 ◽  
Vol 07 (06) ◽  
pp. 1440001 ◽  
Author(s):  
Michał Świętosławski ◽  
Marcin Molenda ◽  
Piotr Natkański ◽  
Piotr Kuśtrowski ◽  
Roman Dziembaj ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Sol Gel ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Structural And Electrical Properties ◽  
Potential Alternative ◽  
Sol Gel Synthesis ◽  
First Time

Polyanionic cathode materials for lithium-ion batteries start to be considered as potential alternative for layered oxide materials. Among them, Li 2 CoSiO 4, characterized by outstanding capacity and working voltage, seems to be an interesting substitute for LiFePO 4 and related systems. In this work, structural and electrical investigations of Li 2 CoSiO 4 obtained by sol–gel synthesis were presented. Thermal decomposition of gel precursor was studied using EGA (FTIR)-TGA method. Chemical composition of the obtained material was confirmed using X-ray diffraction and energy-dispersive X-ray spectroscopy. The morphology of β- Li 2 CoSiO 4 was studied using transmission electron microscopy. High temperature electrical conductivity of Li 2 CoSiO 4 was measured for the first time. Activation energies of the electrical conductivity of two Li 2 CoSiO 4 polymorphs (β and γ) were determined. The room temperature electrical conductivity of those materials was estimated as well.

scholarly journals Formation of nanoscopic CaF2via a fluorolytic sol–gel process for antireflective coatings

2015 ◽  
Vol 3 (8) ◽  
pp. 1716-1723 ◽  
Author(s):  
Alexander Rehmer ◽  
Kerstin Scheurell ◽  
Erhard Kemnitz
Keyword(s):  
Sol Gel ◽  
Nano Particles ◽  
Antireflective Coatings ◽  
Sol Gel Process ◽  
Sol Gel Synthesis ◽  
First Time

For the first time transparent antireflective CaF2-coatings were prepared from clear CaF2-sols obtained via the fluorolytic sol–gel synthesis and containing homo-dispersed CaF2 nano-particles.

scholarly journals A sol–gel synthesis to prepare size and shape-controlled mesoporous nanostructures of binary (II–VI) metal oxides

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14134-14146 ◽  
Author(s):  
Ryan Yarbrough ◽  
Klinton Davis ◽  
Sheeba Dawood ◽  
Hemali Rathnayake
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Self Assembly ◽  
Sol Gel ◽  
Assembly Process ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Shape Controlled ◽  
Sol Gel Synthesis ◽  
Mesoporous Metal

A base-catalyzed sol–gel approach combined with a solvent-driven self-assembly process at low temperature is augmented to make highly mesoporous metal oxide nanostructures of manganese and copper, and hydroxide nanostructures of magnesium.

Sol–gel synthesis of mesoporous CaFe2O4 photocathodes with hierarchical pore morphology

2019 ◽  
Vol 3 (5) ◽  
pp. 1150-1153 ◽  
Author(s):  
Kristin Kirchberg ◽  
Roland Marschall
Keyword(s):  
Sol Gel ◽  
Dip Coating ◽  
Pore Morphology ◽  
Medium Temperature ◽  
Hierarchical Pore ◽  
Sol Gel Synthesis ◽  
First Time

Hierarchical mesoporous p-CaFe2O4 photocathodes are for the first time prepared by sol–gel dip-coating and calcination at only medium temperature (700 °C).

Mesoporous Hybrid Thin Films: Building Blocks for Complex Materials with Spatial Organization

2007 ◽  
Vol 1007 ◽  
Author(s):  
Galo J. Soler-Illia ◽  
Paula C. Angelomé ◽  
M. Cecilia Fuertes ◽  
Alejandro Wolosiuk ◽  
Sara A. Bilmes ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Spatial Organization ◽  
Sol Gel ◽  
Building Blocks ◽  
Film Deposition ◽  
One Pot ◽  
Selective Functionalization ◽  
Hybrid Thin Films ◽  
Sol Gel Synthesis

ABSTRACTMesoporous Hybrid Thin Films (MHTF) of a variety of compositions and embedded organic functions are produced by combining sol-gel synthesis, template self-assembly and surface modification. One-pot or post-grafting strategies permit to modify the pore surface behavior. Highly controlled MHTF issued from a reproducible and modular synthesis can be used as building blocks for more complex structures, presenting order at larger scales, and novel properties derived from this multiscale order. Multilayer stacks of MHTF presenting specific and different functions and frameworks located in a well-defined position have been produced by combining sequential film deposition, selective functionalization and dissolution. These systems present new properties such as localized chemistry or modulable photonic crystal behavior.

scholarly journals Precursor Linear Self-Assembly Nonhydrolytic Sol-Gel Synthesis of Ba0.7Sr0.3TiO3 Ceramic Fibers

2021 ◽  
Author(s):  
Guo Feng ◽  
Li Yin ◽  
Feng Jiang ◽  
Zhijun Yan ◽  
Jinlin Xu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Colloidal Particle ◽  
Sol Gel ◽  
The Novel ◽  
Ceramic Fibers ◽  
Electronic Products ◽  
Linear Assembly ◽  
Oxygen Donor ◽  
Association Structure ◽  
Sol Gel Synthesis

Abstract Ba0.7Sr0.3TiO3 ceramic fibers were synthesized via the precursor linear self-assembly nonhydrolytic sol-gel (NHSG) method, taking TiCl4 as the titanium source, anhydrous barium acetate and strontium acetate as the barium source and strontium source, anhydrous ethanol and glycol as the oxygen donor and solvent, respectively. The NHSG method promotes the formation of Ba–O–Ti and Sr–O–Ti through heterogeneous condensation. The bimolecular association structure of the reaction intermediate (chlorotitanium ethoxide) between ethanol and titanium tetrachloride facilitates the self-linear assembly of precursors. It also enables linear colloidal particle formation and excellent spinnability of the sol. The novel Ba0.7Sr0.3TiO3 ceramic fibers would promote the flexibility of electronic products.

scholarly journals Organosulfur adsorbents by self-assembly of titania based ternary metal oxide nanofibers

2017 ◽  
Vol 5 (20) ◽  
pp. 9561-9571 ◽  
Author(s):  
Ruohong Sui ◽  
Sarah K. Carefoot ◽  
Christopher B. Lavery ◽  
Connor E. Deering ◽  
Kevin L. Lesage ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Self Assembly ◽  
Selective Adsorption ◽  
Sol Gel ◽  
One Pot ◽  
Ternary Metal ◽  
Sol Gel Synthesis

One-pot sol–gel synthesis of ternary metal oxides for selective adsorption of thiols from H2S/CO2-containing gas.

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