Nanodisperse photocatalysts based on titanium dioxide

Fedotova, M. P.; Voronova, Gulnara A.; Emel’yanova, E. Yu.; Radishevskaya, N. I.; Vodyankina, O. V.

doi:10.1134/s0036024409080202

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…They assumed that NH 4 ? and SO 4 2ion adsorptions on surface of TiO 2 and post hydrothermal treatment have contributed to the formation of an oriented agglomerated structure in a single crystal axis. They believed that it was the key factor that led to the building-up of the coating.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Transformation of Amorphous Sol–Gel TiO2 Powder to Anatase During Cold Spray Deposition

2018

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Nanocrystalline TiO 2 coatings were successfully deposited on metallic substrate surfaces through lowpressure cold spray. Sol-gel amorphous TiO 2 dry gel was for the first time used as a feedstock powder. Agglomerated morphology of the amorphous powder with high-density packing of particles and reduced pores number was an important factor for successful low-pressure cold spraying. However, in the present study one more factor contributing to anchoring of TiO 2 particles by cold gas spraying onto a substrate was indicated. This factor enabling effective powder deposition and coating production is based on an exotic for conventional ceramic materials' plastic deformation of amorphous powder. Furthermore, the detailed analysis of SEM, Raman and XRD measurements clearly demonstrated that amorphous titanium dioxide is transformed into crystalline anatase form during the process of low-pressure cold spraying.

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Section: Introductionmentioning

confidence: 99%

Low-Temperature Transformation of Amorphous Sol–Gel TiO2 Powder to Anatase During Cold Spray Deposition

2018

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“…Two series of samples, namely, TiO 2 /SiO 2 and TiO 2 /Al 2 O 3 (3-15 wt% TiO 2 ), have been prepared using the method of heterogeneous deposition [4]. The SiO 2 aerogel (prepared by the method [5]) and γ-Al 2 O 3 were used as supports.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Support on the Surface Properties and Photocatalytic Activity of Supported TiO<sub>2</sub> Catalysts

Vodyankin

Vodyankina

2015

KEM

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In the present work two series of TiO2/SiO2 and TiO2/Al2O3 photocatalysts were investigated. The content of the active component was varied. Photocatalysts were prepared using the heterogeneous deposition method. It was revealed that the prepared photomaterials demonstrate high photocatalytic activity in decomposition of organic compounds in water solutions, and application of SiO2 aerogel as a support ensured the incorporation of TiO2 into the structure of the support via formation of Ti-O-Si bonds. The prepared materials, in which the active component is under the influence of electron-acceptor media, demonstrated enhanced selectivity of the surface towards the ability to generate electronic vacancies (about 90%). According to the experimental data, TiO2/SiO2 photocatalysts proved to be more active in comparison with TiO2/Al2O3 materials.

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“…The active component was deposited onto the SiO 2 surface via grafting [14]. The synthesis was performed at 107°C.…”

Section: Preparation Of Supports and Catalystsmentioning

confidence: 99%

Support pretreatment effect on the catalytic properties and reusability of silica-supported titania catalysts in 2,3,6-trimethylphenol oxidation with hydrogen peroxide

et al. 2015

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The effects of some variants for silica support pretreatment on the catalytic properties and reus ability of silica supported titania in the liquid phase oxidation of 2,3,6 trimethylphenol (TMP) into 2,3,5 trimethyl 1,4 benzoquinone (TMBQ) with hydrogen peroxide, a green oxidizer, have been investigated. The support pretreated with aqueous ammonia and then evacuated demonstrates the optimal activity, selectivity, and reusability of catalysts. The TMBQ selectivity reaches 93% at a TMP conversion of 90% in at least four cycles for the catalyst prepared.

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Nanodisperse photocatalysts based on titanium dioxide

Cited by 10 publications

References 8 publications

Low-Temperature Transformation of Amorphous Sol–Gel TiO2 Powder to Anatase During Cold Spray Deposition

Low-Temperature Transformation of Amorphous Sol–Gel TiO2 Powder to Anatase During Cold Spray Deposition

The Effect of Support on the Surface Properties and Photocatalytic Activity of Supported TiO<sub>2</sub> Catalysts

Support pretreatment effect on the catalytic properties and reusability of silica-supported titania catalysts in 2,3,6-trimethylphenol oxidation with hydrogen peroxide

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