Morphological, chemical and structural
characterization of silica-containing
polyvinylpyrrolidone electrospun
nanofibers prepared by sol-gel technique

Purpose: The aim of this study was to produce poly(vinylpyrrolidone) (PVP) containingsilica nanofibers using electrospinning method from 10% PVP/EtOH solutions with differentmass concentration 0 and 30% of tetraethoxysilane. Sol-gel technique was used to obtainnanofiber membranes with high amount of inorganic phase. In the case when metal alkoxide,such as tetraethyl orthosilicate (TEOS) is mixed with an organic polymer, hydrolysis andcondensation reaction of TEOS occur in-situ with polymer matrix, which allows to fabricateorganic-inorganic hybrid structures with uniform dispersion.Design/methodology/approach: The examination of the morphology of the obtainedPVP/silicon dioxide nanofibers using scanning electron microscope (SEM) has been made.The chemical structure of produced nanostructures was investigated by Fourier - TransformInfrared spectroscopy (FTIR) and Energy Dispersive Spectrometry (EDX) to analyze theregular dispersion by examining types of bonds occurring between polymer matrix and SiO2phase.Findings: Results obtained in this paper shows that the mass concentration of thereinforcing phase in form of TEOS have an influence on the average diameter of nanofibersand with the increase of tetraethyl orthosilicate in solution nanofibers diameters decrease.Moreover, structural examination shows uniform dispersion of the reinforcing phase in hybridmaterials.Research limitations/implications: Uniform dispersion of the reinforcing phase insilica-containing PVP nanofibers gives the opportunity to make nanowires in calcinationprocess from such obtained fibrous mats and use in novel electrical devices.Originality/value: This paper describes an easy and more effective way of makingpolymer nanofibers with the content of silicon dioxide with the perspective way of makingsilica nanowires in the future from obtained hybrid nanofibers, so that this method canreplace commonly used nanowires growth processes.

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Metal alkoxides as precursors for thin-film growth

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences ◽

10.1098/rsta.1990.0010 ◽

1990 ◽

Vol 330 (1610) ◽

pp. 167-171 ◽

Cited By ~ 22

Keyword(s):

Thin Film ◽

Film Growth ◽

Sol Gel ◽

Pure Metal ◽

Thin Film Growth ◽

Metal Alkoxide ◽

Metal Alkoxides ◽

Oxide Deposition ◽

Gel Technique ◽

Deposition Processes

The metal alkoxides [M (OR) x ] n are excellent precursor compounds for synthesizing pure metal oxides, glasses and ceramics by either the MOCVD or the sol—gel technique depending on the volatility and solubility of the metal alkoxide. Factors controlling the volatility of metal alkoxides are discussed together with possible mechanisms for the oxide deposition processes.

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Multilayer Epitaxial Ferroelectric nx(SrTiO3/PbTiO3) Thin Films Prepared By The Sol-Gel Technique

MRS Proceedings ◽

10.1557/proc-341-367 ◽

1994 ◽

Vol 341 ◽

Author(s):

Yudan Lou ◽

Yuhuan Xu ◽

John D. Mackenzie

Keyword(s):

Thin Films ◽

Optical Properties ◽

Single Crystal ◽

Sol Gel ◽

Multilayer Films ◽

Dip Coating ◽

Metal Alkoxide ◽

Average Thickness ◽

Gel Technique ◽

Different Thickness

AbstractMultilayer epitaxial ferroelectric PbTiO3 and SrTiO3 thin films were grown alternatively on single crystal SrTiO3 (001) substrate by the sol-gel technique in this study. Lead titanium double metal alkoxide and strontium titanium double metal alkoxide were used for dip coating. By controlling the dip coating speed and the concentration of sol-gel solution, different thickness of films was obtained. The average thickness of each PbTiO3 or SrTiO3 layer was 120 Å which was measured by SEM method. By using XRD the structure of the epitaxial multilayer films was examined. The epitaxial PbTiO3 and SrTiO3 thin films could be obtained at 700°C and 800°C respectively. The change of transmittance with wavelength on 12( 6×[SrTiO3/PbTiO3]) layer films was measured. The structure and the optical properties of the films were discussed.

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Preparation of Silicon Dioxide Fiber via Sol-Gel Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.794 ◽

2008 ◽

Vol 368-372 ◽

pp. 794-796

Author(s):

Xiao Hui Wang ◽

Xiao Ping Liang ◽

Shao Bo Xin

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Hydrochloric Acid ◽

Silicon Dioxide ◽

Sol Gel ◽

Tetraethyl Orthosilicate ◽

Molar Ratio ◽

Sol Gel Process ◽

Different Temperatures ◽

Scanning Electron

Silicon dioxide gel fibers were prepared by hydrolysis reaction of tetraethyl orthosilicate (TEOS). TEOS was used as basic materials, anhydrous ethanol (EtOH) as solvent and hydrochloric acid (HCl) as the catalyst. The best proportion of the chosen materials (TEOS, EtOH, H2O and HCl) was 1:1:1.5:0.03(molar ratio).Gel fibers were investigated by thermogravimetry (TG). Silicon dioxide fibers were obtained by treating the gel fibers at different temperatures. The calcined fibers were characterized by scanning electron microscopy (SEM). The optimal sintering schedule was obtained. Silicon dioxide fiber dried at 200°C for 1 hour then calcined at 800°C for 3 hours was the best.

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Preparation and Deposition of Hydroxyapatite on Biomaterials by Sol-Gel Technique-A Review

Chitkara Chemistry Review ◽

10.15415/ccr.2013.12011 ◽

2013 ◽

Vol 1 (2) ◽

pp. 59-69 ◽

Cited By ~ 6

Author(s):

Sarbjit Kaur ◽

Niraj Bala ◽

Charu Khosla

Keyword(s):

Sol Gel ◽

Gel Technique

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Sol - Gel Technique Applied for Biomaterials Achievement

Recent Patents on Materials Science ◽

10.2174/1874464811104030224 ◽

2011 ◽

Vol 4 (3) ◽

pp. 224-237 ◽

Cited By ~ 3

Author(s):

Aurica P. Chiriac ◽

Loredana E. Nita ◽

Iordana Neamtu ◽

Manuela T. Nistor

Keyword(s):

Sol Gel ◽

Gel Technique

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Structural and thermal properties of monolithic silica–phosphate (SiO2–P2O5) gel glasses prepared by sol–gel technique

Journal of Sol-Gel Science and Technology ◽

10.1007/s10971-011-2420-0 ◽

2011 ◽

Vol 58 (2) ◽

pp. 507-517 ◽

Cited By ~ 14

Author(s):

M. Kamal ◽

I. K. Battisha ◽

M. A. Salem ◽

A. M. S. El Nahrawy

Keyword(s):

Thermal Properties ◽

Sol Gel ◽

Monolithic Silica ◽

Gel Technique ◽

Gel Glasses

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Effect of alkali metal (Na, K) ion ratio on structural, optical and photoluminescence properties of K0.5Na0.5NbO3 ceramics prepared by sol–gel technique

Bulletin of Materials Science ◽

10.1007/s12034-020-02341-x ◽

2021 ◽

Vol 44 (1) ◽

Author(s):

SHAMMI KUMAR ◽

NAGESH THAKUR

Keyword(s):

Alkali Metal ◽

Sol Gel ◽

Photoluminescence Properties ◽

Gel Technique

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Sulfonated poly(arylene ether sulfone) functionalized polysilsesquioxane hybrid membranes with enhanced proton conductivity

e-Polymers ◽

10.1515/epoly-2020-0048 ◽

2020 ◽

Vol 20 (1) ◽

pp. 430-442 ◽

Cited By ~ 2

Author(s):

Rajdeep Mukherjee ◽

Arun Kumar Mandal ◽

Susanta Banerjee

Keyword(s):

Proton Conductivity ◽

Sol Gel ◽

Composite Membranes ◽

Casting Technique ◽

Force Microscopy ◽

Arylene Ether ◽

Transmission Electron ◽

Uniform Dispersion ◽

Solution Casting Technique ◽

Sulfonated Poly

AbstractSulfopropylated polysilsesquioxane and –COOH containing fluorinated sulfonated poly(arylene ether sulfone) composite membranes (SPAES-SS-X) have been prepared via an in situ sol–gel reaction through the solution casting technique. The composite membranes showed excellent thermal and chemical stability, compared to the pristine SPAES membrane. The uniform dispersion of the sulfonated SiOPS nanoparticles on the polymer matrix was observed from the scanning electron microscope images. Atomic force microscopy and transmission electron microscopy images indicated significantly better phase-separated morphology and connectivity of the ionic domains of the composite membranes than the pristine SPAES membrane. The composite membranes showed considerable improvement in proton conductivity and oxidative stability than the pristine copolymer membrane under similar test conditions.

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Tailoring Mesoporous Titania Features by Ultrasound-Assisted Sol-Gel Technique: Effect of Surfactant/Titania Precursor Weight Ratio

Nanomaterials ◽

10.3390/nano11051263 ◽

2021 ◽

Vol 11 (5) ◽

pp. 1263

Author(s):

Elvira Mahu ◽

Cristina Giorgiana Coromelci ◽

Doina Lutic ◽

Iuliean Vasile Asaftei ◽

Liviu Sacarescu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Sol Gel ◽

Weight Ratio ◽

Soft Template ◽

Synthesis Process ◽

Mesoporous Titania ◽

Cavitation Effect ◽

Titania Precursor ◽

Gel Technique ◽

Ultrasound Assisted

A mesoporous titania structure has been prepared using the ultrasound-assisted sol-gel technique in order to find out a way to tailor its structure. The TiO2 obtained was compared to the same version of titania but synthesized by a conventional sol-gel method with the objective of understanding the effect of ultrasound in the synthesis process. All synthesis experiments were focused on the preparation of a titania photocatalyst. Thus, the anatase photocatalytic active phase of titania was proven by X-ray diffraction. Additionally, the ultrasonation treatment proved to increase the crystallinity of titania samples, being one of the requirements to having good photocatalytic activity for titania. The influence of surfactant/titania precursor weight ratio on the structural (XRD), textural (N2-sorption measurements), morphological (TEM), surface chemistry (FTIR) and optical properties (UVDR) was investigated. It was observed that the crystallite size, specific surface area, band gap energy and even photocatalytic activity was affected by the synergism occurring between cavitation effect and the surfactant/titania precursor weight ratio. The study yielded interesting great results that could be considered for further application of ultrasound to tailor mesoporous titania features via sol-gel soft template synthesis, against conventional sol-gel process.

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