Composite TiO2/fiberglass catalyst: Synthesis and characterization

Shamsutdinova, A. N.; Brichkov, Anton S.; Paukshtis, E. A.; Larina, T. V.; Cherepanova, Svetlana V.; Glazneva, Tatiana S.; Козик, В. В.

doi:10.1016/j.catcom.2016.10.018

Cited by 18 publications

(17 citation statements)

References 28 publications

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“…Fiberglass materials represent a fabric made of thin glass fibers of 7 µm in diameter twisted in threads. 23,24 The specific surface area of the glass fibers is around 1 m 2 /g which is close to the geometrical surface of elementary fibers. [25][26][27] The structure of Zr-containing silicate fiberglass materials is described as a system of domains built of three-dimensional network with six-coordinated Zr atoms connected by 2-4 SiO 4 tetrahedra, which are separated by the narrow "cavities" containing considerable amounts of OH groups.…”

Section: Introductionmentioning

confidence: 82%

“…In our work, we studied water diffusion in the Zr‐containing fiberglass materials at room temperature. Fiberglass materials represent a fabric made of thin glass fibers of 7 µm in diameter twisted in threads . The specific surface area of the glass fibers is around 1 m 2 /g which is close to the geometrical surface of elementary fibers .…”

Section: Introductionmentioning

confidence: 93%

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Water diffusion in Zr‐containing fiberglass materials at room temperature

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Diffusion of water into Zr‐containing silica fiberglass materials was studied at room temperature by infrared spectroscopy. Several types of experiments were performed: (a) rehydration with H2O of fiberglass materials previously calcined in air at 450°C and under vacuum at 180°C; (b) isotopic experiments for uncalcined fiberglass materials using D2O with and without the presence of sodium. Water diffusion coefficients were determined in each case. It was suggested that the transfer of the protons and water molecules occurred by different mechanisms: the protons diffused through the hydroxyl groups via the relay mechanism like in liquid water, whereas water diffused more slowly in the form of molecular water.

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Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 93%

Water diffusion in Zr‐containing fiberglass materials at room temperature

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“…It has been reported that the presence of silica (SiO 2 ) in SiO 2 ‐TiO 2 materials contributes to the formation of the anatase phase . In a previous study, the present authors successfully prepared a TiO 2 /fiberglass catalyst by the sol–gel method via impregnation of fiberglass with a sol based on tetrabutoxytitanium and subsequent staged heat treatment …”

Section: Introductionmentioning

confidence: 93%

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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“…The second stage is the preparation of an aggregative-stable sols according to the method represented in Ref. [23]. To prepare the sol, tetrabutoxytitanium (TBT, extrapurity, Acros, USA, Ti(C 4 H 9 O) 4 with concentration 0.1 mol/L), distilled water (H 2 O with concentration 0.4 mol/L) and nitric acid (pure 99%, UralPromPostavka LLC, Russian Federation, HNO 3 with concentration 2.5 • 10 −3 mol/L, using butyl alcohol as a solvent (pure 99%, "EKOS-1" JSC, Russian Federation).…”

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confidence: 99%

“…This may be due to the fact that the TOKEM-250 cation exchanger used as an organic matrix was used in sodium form and as a result of sorption, not all sodium ions were replaced by chromium (III) ions. According to researches of such systems [5,21,23] and based on XRD data and micro-X-ray spectral analysis, we assume that the samples obtained are oxides TiO 2 and Cr 2 O 3 .…”

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Production of TiO2/Cr2O3 Composite Material in the Spherical Form

et al. 2019

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Spherical TiO2/Cr2O3 oxides composites were obtained by template method accompanied with sol-gel method. Ion exchange resins of spherical form (TOKEM-100 and TOKEM-250) were used as an organic polymer matrix. Thermal analysis, X-ray phase analysis and micro-X-ray spectral analysis were used to identify the formation process and compositions of oxides composites. The formation of spherical oxide composite ends at 400 °C and the final products are a mixture of two oxides: Cr2O3 and TiO2 regardless of the structure of the used template. According SEM data prepared TiO2/Cr2O3 composites have spherical form and the size of sphere found to be in a range from 300 to 870 µm.

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Composite TiO2/fiberglass catalyst: Synthesis and characterization

Cited by 18 publications

References 28 publications

Water diffusion in Zr‐containing fiberglass materials at room temperature

Water diffusion in Zr‐containing fiberglass materials at room temperature

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

Production of TiO2/Cr2O3 Composite Material in the Spherical Form

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Composite TiO2/fiberglass catalyst: Synthesis and characterization

Cited by 18 publications

References 28 publications

Water diffusion in Zr‐containing fiberglass materials at room temperature

Water diffusion in Zr‐containing fiberglass materials at room temperature

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

Production of TiO2/Cr2O3 Composite Material in the Spherical Form

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