Transformation of brookite-type TiO2 nanocrystals to rutile: correlation between microstructure and photoactivity

Bakardjieva, Snejana; Štengl, Václav; Szatmáry, Lórant; Šubrt, Ján; Lukáč, Jozef; Murafa, Nataliya; Nižňanský, Daniel; Čížek, Karel; Jirkovský, Jaromı́r; Petrova, Nadia

doi:10.1039/b514632a

Cited by 192 publications

(149 citation statements)

References 28 publications

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“…S1). [31] as was confirmed by XRD (see Supporting Information, HRTEM investigation of the nanoparticles in Fig. 2b confirms the presence of individual single crystal embedded nanoparticles with diameters of ~5 nm.…”

Section: Synthesis Of Model Precursorsmentioning

confidence: 51%

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Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Dı́az

Valenzuela

Bravo

et al. 2011

Journal of Colloid and Interface Science

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Section: Synthesis Of Model Precursorsmentioning

confidence: 51%

“…1 H and 13 C{ 1 H} NMR are given in δ relative to TMS. 31 P{ 1 H} are given in δ relative to external 85% aqueous H 3 PO 4 .Coupling constants are in Hz.…”

Section: Methodsmentioning

confidence: 99%

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Dı́az

Valenzuela

Bravo

et al. 2011

Journal of Colloid and Interface Science

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“…Brookite has been prevalently prepared from titanium(IV) compounds via hydrothermal treatments at high temperature, 6-8 but recently brookite nanoparticles have been synthesised under mild temperature and pressure conditions, 9-11 also by employing titanium(III) compounds as TiO 2 precursors. 12 Anatase is generally considered the most efficient TiO 2 polymorph in photocatalytic reactions, whereas the activity of the rutile phase can be strongly affected by the preparation conditions. 13 Only a very limited number of studies examined the photocatalytic behaviour of brookite so far.…”

Section: Introductionmentioning

confidence: 99%

“…For example, brookite revealed good photocatalytic capacity for the photodegradation of 4-nitrophenol 11 and 4-chlorophenol. 12 Thin films of brookite a Golgi 19, I-20133 showed a good efficiency for the gas-phase photo-oxidation of 2-propanol, 14,15 and brookite powders were employed for the selective photocatalytic oxidation of an aromatic alcohol to aldehyde in an organic-free water suspension. 16 Recently, brookite has been also successfully employed in the photocatalytic production of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Effect of titanium dioxide crystalline structure on the photocatalytic production of hydrogen

Chiarello

Paola

Palmisano

et al. 2011

Photochem Photobiol Sci

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PapersPerformance of the photo-Fenton process in the degradation of a model azo dye mixture J. Macías-Sánchez et al., Photochem. Photobiol. Sci., 2011, 10 The effect of the crystalline phase of TiO 2 (anatase, rutile and brookite) on its photocatalytic activity in hydrogen production from methanol-water vapours has been investigated by testing a series of both home-made and commercial TiO 2 photocatalysts, either bare or surface-modified by deposition of a fixed amount, i.e. 1 wt%, of platinum as co-catalyst. For all of the TiO 2 samples the rate of hydrogen production increased by one order of magnitude upon Pt deposition, because of the ability of Pt to enhance the separation of photoproduced electron-hole pairs. Under irradiation in the 350-450 nm wavelength range, brookite and anatase showed similar photoactivities, both superior to that of rutile. By contrast, rutile, possessing a narrower band gap, was active also under visible light (l > 400 nm), whereas no hydrogen evolution was observed with anatase and brookite under such conditions. Surface area proved to be a key parameter, strongly influencing photoactivity. However, as the particle size became ultra-small, the semiconductor absorption edge was blue-shifted because of size quantisation effects, with a consequent decrease in hydrogen production rate due to the smaller portion of incident photons absorbed by the photocatalyst.

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“…It is reported that ART is irreversible process [25]. Furthermore, it is reported frequently that a mixed anatase/rutile or anatase/brookite/rutile phase composition is advantageous for photocatalytic and optoelectronic applications owing to improved charge carrier separation [31][32][33].…”

Section: Methodsmentioning

confidence: 99%

Influence of pH on the Formulation of TiO<sub>2</sub> Nanocrystalline Powders

El-Shear¹

2017

AJMSP

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TiO 2 nanoparticles were prepared by Sol-Gel method at different pH values (4, 3.5, 3, 2.5, and 2). All samples were heated at 500°C for 18 h. The optical, morphological, and structural properties of the samples have been investigated using XRD, SEM, and UV-vis spectrophotometer techniques. The results indicated the formation of TiO 2 nanoparticles with pure Anatase phase at pH= 4 and 3.5, while further decreasing of pH, the Rutile phase start to appear intensively compare to Anatase phase. For pH=3, the ratio Rutile phase to Anatase phase was found to be around 76%.

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Transformation of brookite-type TiO2 nanocrystals to rutile: correlation between microstructure and photoactivity

Cited by 192 publications

References 28 publications

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Effect of titanium dioxide crystalline structure on the photocatalytic production of hydrogen

Influence of pH on the Formulation of TiO<sub>2</sub> Nanocrystalline Powders

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Transformation of brookite-type TiO2 nanocrystals to rutile: correlation between microstructure and photoactivity

Cited by 192 publications

References 28 publications

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Solid-state synthesis of embedded single-crystal metal oxide and phosphate nanoparticles and in situ crystallization

Effect of titanium dioxide crystalline structure on the photocatalytic production of hydrogen

Influence of pH on the Formulation of TiO&lt;sub&gt;2&lt;/sub&gt; Nanocrystalline Powders

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Product

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Influence of pH on the Formulation of TiO<sub>2</sub> Nanocrystalline Powders