Production and properties of nanostructured composite films containing silica and d-metal oxides (Mn, Fe, Co, Ni)

Козик, В. В.; Brichkov, Anton S.; Brichkova, V. Yu.; Ivanov, V. K.; Толбанов, О. П.; Огородников, В. Д.; Tret’yakov, Yu. D.

doi:10.1134/s0012500812080046

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…The solution was kept at room temperature for 3 days. The proposed composition was selected on the basis of earlier studies . The content of SiO 2 in oxide systems of >20 mol% leads to a significant decrease in the degree of crystallinity of materials.…”

Section: Methodsmentioning

confidence: 99%

“…A number of studies have shown that the properties of a sol are influenced both by its composition and preparation parameters (e.g. the order of mixing the components and the sol aging time) . Because fiberglass is hydrophobic, it is difficult to create an homogeneous coating of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Because fiberglass is hydrophobic, it is difficult to create an homogeneous coating of TiO 2 . It was found that the introduction of tetraethoxysilane into the sol composition made it possible to obtain uniform oxide coatings on substrates of various types . An increase in the SiO 2 content (≤30 mol%) allows preparation of uniform coatings with a small particle size of angular shape .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂

Brichkov

Shamsutdinova

Khalipova

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Preparation of homogeneous oxide coatings on the surface of fiberglass is a difficult task due to hydrophobicity of the fiberglass support. NiO-TiO 2 cannot coat the fiberglass surface homogeneously. In the present study, SiO 2 was added in the NiO-TiO 2 . A sol-gel method was used to prepare Ni-Si-Ti sol and this was used to coat fiberglass and form a complex Ni-Si-Ti oxide system supported on its surface. The catalyst was tested for hydrocarbon oxidation reaction. RESULTS: The as-prepared material is a mixture of TiO 2 in the anatase modification and SiO 2 in the amorphous phase. UV-visible diffusion reflectance spectroscopy confirmed the presence of Ni 2+Oh cations in the film bulk. Introduction of silica to the sample ensured a uniform distribution of the Ni-Ti oxide system on the fiberglass surface and its durable retention there at 600 ∘ C. The Ni-Si-Ti mixed oxide supported on fiberglass demonstrated a higher catalytic activity in the oxidation of n-heptane, compared to Ni-Ti oxide/fiberglass catalyst. It is stable even at 600 ∘ C, the temperature at which the maximum n-heptane conversion of 93% was reached. CONCLUSION: Adding SiO 2 in NiO-TiO 2 can coat fiberglass homogeneously as SiO 2 can coat hydrophobic surfaces such as fiberglass. This research provides a method with which to coat metal oxide catalyst on fiberglass that is very active and stable for oxidation of hydrocarbons even at high temparatures, compared to that without adding SiO 2 .

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂

Brichkov

Shamsutdinova

Khalipova

et al. 2019

J of Chemical Tech & Biotech

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“…Nowadays, nanostructures made on the basis of mixed oxides are of great interest for fundamental scientific and applied researches. Such structures are used as photocatalysts, luminophores, sensitive elements of gas sensors and vacuum sensors, etc [1]. Nanostructures based on mixed oxides are obtained by various methods, among which sol-gel technology occupies a special place.…”

Section: Introductionmentioning

confidence: 99%

Investigation of NiO-Al2O3-SiO2 Properties via XRD, FTIR Techniques and Thermal Analysis

Антошкина

Rakova

Ефремов

2019

MSF

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Nowadays, nanostructures made on the basis of mixed oxides are of great interest for fundamental scientific and applied researches because of its potential applications, such as photo catalysts, luminophores, sensitive elements of gas sensors and vacuum sensors. The article describes nanostructural properties of NiO–Al2O3–SiO2 prepared by sol-gel method. Nanocomposites were obtained by mixing a solution of Si (OC2H5)4 (TEOS) as a SiO2 precursor with a solution containing Al (NO3)3 · 9H2O and Ni (NO3)2 · 6H2O. Ethanol was used as solvent. The gel was dried at room temperature and annealed in the 100–500 °C range. The behavior of chemical bonds is considered by using FTIR technique. Crystallization of NiO phase at 500 °C is observed in XRD patterns. Aluminum atoms are incorporated into silica matrix, which was confirmed by XRD. The amorphous structures which are desirable for next generations are formed at room temperature.

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Concentration of ions Co(II), Ni(II) at the Tokem-250 carboxylic cation exchange for catalysts development

Zharkova

Bobkova

Brichkov

et al. 2017

AIP Conference Proceedings

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Production and properties of nanostructured composite films containing silica and d-metal oxides (Mn, Fe, Co, Ni)

Cited by 6 publications

References 2 publications

Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂

Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂

Investigation of NiO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> Properties via XRD, FTIR Techniques and Thermal Analysis

Concentration of ions Co(II), Ni(II) at the Tokem-250 carboxylic cation exchange for catalysts development

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Production and properties of nanostructured composite films containing silica and d-metal oxides (Mn, Fe, Co, Ni)

Cited by 6 publications

References 2 publications

Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO2

Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO2

Investigation of NiO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> Properties via XRD, FTIR Techniques and Thermal Analysis

Concentration of ions Co(II), Ni(II) at the Tokem-250 carboxylic cation exchange for catalysts development

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Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂

Preparation of a fiberglass‐supported Ni‐Si‐Ti oxide catalyst for oxidation of hydrocarbons: effect of SiO₂