Sol–gel synthesis of Ta2O5–SiO2 composites from tantalum(V) chloride and tetraethyl orthosilicate in ethanol

PhosphateZrO2Si2O catalysts were synthesized by sol-gel method using tributyl phosphite, zirconium propoxide, and tetraethyl orthosilicate as precursors. They were characterized by N2 adsorption, 31P CP MAS NMR, and DRIFTS. At lower P content, monomeric phosphates were formed on the surface of the catalysts, which were mainly responsible for the isopropanol dehydration activity. At higher P content, polyphosphates were formed, and thus, the dehydration activity decreased. An optimum P content for dehydration activity was found to be at 10 mol%.Key words: sol-gel synthesis, ternary oxides, phosphate, acid catalyst, alcohol dehydration, 31P CP MAS NMR, N2 adsorption, DRIFTS.

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Copolymers and Proton Conducting Films Based on N-Vinylpyrazole

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.749.71 ◽

2013 ◽

Vol 749 ◽

pp. 71-76 ◽

Cited By ~ 1

Author(s):

Oksana Lebedeva ◽

Yury Pozhidaev ◽

Evgenya Sipkina ◽

Alexandra Chesnokova ◽

Nikolay Ivanov

Keyword(s):

Methyl Methacrylate ◽

Radical Polymerization ◽

Proton Conductivity ◽

Vinyl Chloride ◽

Sol Gel ◽

Tetraethyl Orthosilicate ◽

Proton Conducting ◽

Inorganic Composites ◽

Microstructure Parameters ◽

Sol Gel Synthesis

The copolymers of N-vinylpyrazole with vinyl chloride and methyl methacrylate were obtained by radical polymerization. Constants reactivity and microstructure parameters of copolymers were calculated and their properties were studied. The sol-gel synthesis of obtained copolymers with tetraethyl orthosilicate results in a hybrid organic-inorganic composites. Films with proton conductivity to 7.8·10-3 S·sm-1 were formed on the basis the copolymers and composites.

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

MRS Proceedings ◽

10.1557/proc-780-y4.12 ◽

2003 ◽

Vol 780 ◽

Cited By ~ 1

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.

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

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.11(3).03021 ◽

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

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

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2021.06.026 ◽

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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Morphological Evolution of Boron Carbide Particles: Sol-Gel Synthesis of Nano/Micro B4C Fibers

Ceramics International ◽

10.1016/j.ceramint.2021.06.073 ◽

2021 ◽

Author(s):

Suna Avcioglu ◽

Figen Kaya ◽

Cengiz Kaya

Keyword(s):

Boron Carbide ◽

Morphological Evolution ◽

Sol Gel ◽

Sol Gel Synthesis ◽

Carbide Particles

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Aqueous Sol-Gel Synthesis of Different Iron Ferrites: From 3D to 2D

Materials ◽

10.3390/ma14061554 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1554

Author(s):

Justinas Januskevicius ◽

Zivile Stankeviciute ◽

Dalis Baltrunas ◽

Kęstutis Mažeika ◽

Aldona Beganskiene ◽

...

Keyword(s):

Magnetic Measurements ◽

Substrate Surface ◽

Sol Gel ◽

Synthesis Method ◽

Xrd Analysis ◽

Dip Coating ◽

Yttrium Iron ◽

Iron Garnet ◽

Dip Coating Technique ◽

Sol Gel Synthesis

In this study, an aqueous sol-gel synthesis method and subsequent dip-coating technique were applied for the preparation of yttrium iron garnet (YIG), yttrium iron perovskite (YIP), and terbium iron perovskite (TIP) bulk and thin films. The monophasic highly crystalline different iron ferrite powders have been synthesized using this simple aqueous sol-gel process displaying the suitability of the method. In the next step, the same sol-gel solution was used for the fabrication of coatings on monocrystalline silicon (100) using a dip-coating procedure. This resulted, likely due to substrate surface influence, in all coatings having mixed phases of both garnet and perovskite. Thermogravimetric (TG) analysis of the precursor gels was carried out. All the samples were investigated by X-ray powder diffraction (XRD) analysis. The coatings were also investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM) and Mössbauer spectroscopy. Magnetic measurements were also carried out.

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