Dielectric Tunable Properties of BaTi1-xSnxO3Thin Films Derived from Sol-gel Soft Chemistry

The various gas sensors were designed for detection of different gases in the air using different oxides and impurities [1-3]. For example the manufacturing of ammonia sensors on the basis of CuxS-micro-porous-Si structure includes manufacture of micro-porous silicon, drawing on it of SiO2 isolating layer, and then the CuxS layer [4, 5]. The special equipment for all these processes is needed. More usable method for sensor production is so-called soft chemistry or sol–gel synthesis [6, 7].

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Catalysts for Wet Air Oxidation Based on Ce-Zr-Pr-O Mixed Oxides Prepared by Soft Chemistry

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.45.2089 ◽

2006 ◽

Vol 45 ◽

pp. 2089-2095

Author(s):

Jana Mikulová ◽

Sylvie Rossignol ◽

Jacques Barbier Jr. ◽

Charles Kappenstein ◽

Daniel Duprez

Keyword(s):

Aqueous Solution ◽

Mixed Oxides ◽

Platinum Catalyst ◽

Sol Gel ◽

Ruthenium Catalysts ◽

Catalytic Wet Air Oxidation ◽

Air Oxidation ◽

Wet Air Oxidation ◽

Soft Chemistry ◽

Pure Ceria

Sol-gel Zr0.1Ce0.9O2 and Zr0.1(Ce0.75Pr0.25)O2 mixed oxides and coprecipitated pure ceria CeO2 displaying the fluorine type structure have been used as platinum or ruthenium catalysts’ supports for catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid (78 mmol.L-1). These catalysts were prepared by conventional impregnation (5 wt-%) from platinum and ruthenium precursor salts or by exchange (~2 wt-%) in the case of ruthenium. A screening of catalysts in CWAO at 200°C under 2 MPa was performed and reveals that the best platinum catalyst is supported on pure ceria displaying large surface. For ruthenium catalysts, the highest conversion after 3 hours of reaction has been reached by the Ru/Zr-Ce-O system.

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Silane Primers as Adhesion Promotors for Coatings

Proceedings ◽

10.3390/proceedings2019029073 ◽

2019 ◽

Vol 29 (1) ◽

pp. 73

Author(s):

François Perrin ◽

Anthony Grard ◽

Lénaïk Belec

Keyword(s):

Low Temperatures ◽

Sol Gel ◽

Ceramic Materials ◽

Soft Chemistry ◽

Molecular Precursors ◽

Chemistry Method ◽

Gel Processing

Sol-gel processing is a soft-chemistry method to obtain ceramic materials at low temperatures starting from molecular precursors in solution. [...]

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Aspects Of Chemistry and Chemical Processing Of Organically Modified Ceramics

MRS Proceedings ◽

10.1557/proc-180-961 ◽

1990 ◽

Vol 180 ◽

Cited By ~ 59

Author(s):

Helmut K. Schmidt

Keyword(s):

Molecular Level ◽

Sol Gel ◽

Chemical Properties ◽

Chemical Processing ◽

Inorganic Component ◽

Soft Chemistry ◽

Wide Range ◽

Low Temperature Processing ◽

Organically Modified ◽

And Chemical Properties

ABSTRACTFor the synthesis of composites on a nano or molecular level, chemical or physical methods have to be used since mechanical procedures cannot be employed for these systems. If organics have to be included, low temperature processing has to be used for the synthesis of the inorganic component in order not to damage the organic component. Sol-gel techniques are an appropriate means to synthesize oxidic networks by soft chemistry, and various systems of organically modified ceramics (ORMOCERs) have been developed so far. It has been shown that the synthesis parameter can be used to tailor the material properties in a wide range. A review over the chemistry and chemical properties of ORMOCERs and several examples of material developments will be given.

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Synthesis and Charge-Discharge Characteristics of Polycrystalline LiNi1-xCoxO2 (0 ≤ x ≤ 0.5) as a Cathode Material for Lithium Rechargeable Batteries

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.443 ◽

2007 ◽

Vol 280-283 ◽

pp. 443-446 ◽

Cited By ~ 1

Author(s):

Xin Lu Li ◽

Fei Yu Kang ◽

Wan Ci Shen ◽

Xiu Juan Shi

Keyword(s):

Sol Gel ◽

Hexagonal Lattice ◽

Chelating Agent ◽

Rechargeable Batteries ◽

Potential Range ◽

Electrochemical Characteristics ◽

X Ray Diffraction ◽

Soft Chemistry ◽

Capacity Fading ◽

Lithium Rechargeable Batteries

The synthesis and electrochemical characteristics of LiNi1-xCoxO2 (0 £ x £ 0.5) used as the promising cathode materials for lithium rechargeable batteries were investigated. The LiNi1-xCoxO2 was prepared by a soft chemistry route in which citric acid was used as the chelating agent to make the sol-gel precursor, then was calcined in oxygen atmosphere at the calcination temperature of 800°C for 12 h. Polycrystalline LiNi1-xCoxO2 possesses a hexagonal lattice of the α-NaFeO2 type characterized by using X-ray diffraction. The discharge capacity of LiNi0.8Co0.2O2 was 169.1 mAh/g with the efficiency of 90.5% in the first cycle and 162.1 mAh/g with only 4% capacity fading in the 10th cycle at 0.2 C rate over a potential range of 3.0-4.2 V.

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