Sol–gel synthesis of soda lime silica-based bioceramics using biomass as renewable sources

SnO2-TiO2 sol-gel coatings on soda-lime silicate glass heat treated at 500 °C and xerogel specimens also heat treated at 500 °C were investigated in this study. The morphology of 1, 3, 5 and 7 mol% SnO2 doped titanium oxide coatings were evaluated with a scanning electron microscope (SEM), an atomic force microscope (AFM) and an UV-VIS light spectrophotometer, whilst xerogel structure was analysed with X-ray diffraction spectroscopy (XRD). The physicochemical properties of the TiO2-SnO2 systems depended mainly on the Sn-to-Ti ratio. The surface morphology of the layer was compact and homogeneous with no visible cracks. Anatase and rutile phase was found in the tested 1, 3, 5, 7 and 10 mol% SnO2 doped and heat treated xerogel specimens. Rutile phase content in the heat treated xerogel was reduced, if Sn4+ content was increased. Photocatalytic activity and antibacterial properties were evaluated as well.

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Sol-Gel Synthesis of Soda Lime Silica-Based Bioceramics Using Waste as Renewable Sources

10.21203/rs.3.rs-703473/v1 ◽

2021 ◽

Author(s):

Palakurthy Srin ◽

P. Abdul Azeem ◽

K. Venugopal Reddy

Keyword(s):

Rice Husk ◽

Low Cost ◽

Sol Gel ◽

Soda Lime ◽

Sintered Sample ◽

Biological Properties ◽

Point Of View ◽

Renewable Sources ◽

Bioactive Ceramics

Abstract The purpose of the work is to prepare and assess soda lime silica-based (SiO2-CaO-Na2O) bioactive ceramics using waste as renewable sources. Thus we produced a SiO2-CaO-Na2O-based bioactive ceramic by sol-gel process using rice husk and eggshells as sources of silica and calcium oxide, respectively. The precursors such as calcinated eggshell powder, rice husk ash (RHA) and sodium hydroxide (NaOH) were processed by the sol-gel method, resultant in SiO2-CaO-Na2O-based bioactive ceramics. The gel derived sintered sample showed combeite high (Na6Ca3Si6O18) as a major crystalline phase. Subsequently, the sintered specimens were analyzed from the physical and structural point of view, and in terms of apatite mineralization rate in simulated environments and cytocompatibility in relative to human osteoblast-like cells. The studies showed that the produced crystalline SiO2-CaO-Na2O-based ceramics showed an average porosity of 45%. In vitro evaluation of the biological properties revealed that the prepared ceramics possesses the mineralization of carbonated hydroxyapatite (CHA) in a simulated environment with good cytocompatibility and controlled degradation rate. Therefore, the results obtained suggest that the prepared SiO2-CaO-Na2O-based bioactive ceramics using waste as renewable sources might be a low cost ceramics for applications in biomedical field.

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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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