Preparation of stable anatase-type TiO2 and its photocatalytic performance

Inagaki, Michio; Nakazawa, Yuki; Hirano, Masanori; Kobayashi, Yuichi; Toyoda, Masahiro

doi:10.1016/s1466-6049(01)00176-3

Cited by 157 publications

(79 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A partial transformation to rutile occurred by calcination at 800°C [16]. Anatase samples synthesized under hydrothermal condition from TiOSO 4 aqueous solutions were stable even after annealing at 700°C for 24 h [22]. Only anatase was identified by treating TiO 2 samples obtained by hydrolysis of TiOSO 4 in boiling aqueous solutions of H 2 SO 4 and urea at 600°C for 1 h [14].…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

“…Inagaki et al [22,28] studied the effect of the crystallinity on the photoactivity of anatase fine powders prepared by hydrolysis of TiOSO 4 . Enríquez and Pichat [29] showed that the sintering temperature has a different net effect on the photocatalytic removal rate of various organic pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we report the synthesis of efficient TiO 2 catalysts prepared under similar conditions by thermohydrolysis of TiOSO 4 in water at 100°C. The preparation method is very simple and environmentally friendly since it does not require the use of other reagents [9][10][11][12][13][14][15][16][17][18][19][20] or relatively high temperatures [21][22][23][24][25][26][27][28]. Many literature publications have studied the behaviour of the photocatalysts toward the degradation of various organic substrates, and comparisons of photoactivities have been made either in an aqueous medium or in the gas-phase.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and Photoactivity of Nanocrystalline TiO2 Powders Obtained by Thermohydrolysis of TiOSO4

et al. 2013

View full text Add to dashboard Cite

Nanocrystalline TiO 2 photocatalysts were synthesized in mild conditions by thermohydrolysis of TiOSO 4 in water at 100°C and post-calcination treatment at various temperatures. The TiO 2 powders were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, specific surface area determinations, scanning electron microscopy and electron paramagnetic resonance measurements. The photoactivity of the samples was tested employing the photodegradation of 4-nitrophenol in liquid-solid regimen and the photooxidation of gaseous 2-propanol. The best results were obtained with the powder calcined at 600°C for 10 h. Surprisingly, the not calcined sample was the most active for the abatement of NO x under irradiation.

show abstract

Section: Characterization Of the Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and Photoactivity of Nanocrystalline TiO2 Powders Obtained by Thermohydrolysis of TiOSO4

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Titanium dioxide nanopowder was prepared by different methods such as combustion (Deorsola and Vallauri 2008), solvent evaporation (Fumin et al 2007), hydrothermal (Kobayashi et al 2008;Yamamoto et al 2009;Inagaki et al 2001;Kumar et al 2009) and hydrolysis (Mahshid et al 2007;Zhang et al 2009;Jun et al 2007;Dahlvik et al 2000). Its particle size could be precisely controlled in industrial applications to maximize its reflectance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and application of TiO2 nanopowders as special paper coating pigment

et al. 2013

View full text Add to dashboard Cite

TiO 2 nanopigments in two pure crystallographic forms (anatase and rutile) have been synthesized successfully by two methods; hydrothermal and hydrolysis. The produced pigments from the two methods were investigated physicochemically by several analyses tools. Then they were applied in paper coating mixtures and their influence on coated paper properties was systematically investigated. XRD and FTIR investigations showed that the prepared pigments using hydrothermal method at 100 and 120°C were a mixture of anatase and brookite and pure anatase, respectively, whereas hydrolysis method produced pure rutile phase pigment. TEM investigation showed that the crystallite size of anatase, mixture of anatase and brookite and rutile samples are 6.2, 11.7, and 9.2 nm, respectively. BET studies proved that anatase pigment has 140.74 m 2 /g, 0.237 cc/g and 18.33 Å , whereas rutile has 60.621 m 2 /g, 0.122 cc/g and 14.669 Å , surface area, pore volume and pore diameter, respectively. UV-Vis absorption and PL emission characteristics of the prepared pigments showed that the energy gaps for anatase, mixture of anatase and brookite and rutile are 3.36, 3.30 and 3.37 eV, respectively. The addition of the prepared nanopigments in conjugation with clay in coating mixture increased both brightness and opacity of the coated papers. The greatest effect was obtained upon using rutile nanopigment. Also there was a significant decrease in coated paper roughness while the air permeance started to decrease then increased at 50 % addition levels. In all coated paper, rutile pigment showed the highest enhancement effect on coated paper properties.

show abstract

“…Зміна тривалості синте-зу (з 12 до 96 год ) мало впливає на його результати. Кореляції між структурно-морфологічними характер-ристиками та умовами синтезу розглядалися у робо-тах [81][82][83][84] для випадків гідротермальної обробки розчинів тітанілсульфату (TiOSO 4 ), нітрату титану (TiO(NO 3 ) 2 ) і титанілу (H 2 TiO(C 2 O 4 ) 2 ) та H 2 TiCl 6 . Загалом, можна стверджувати, що, незалежно від типу прекурсору, навіть короткочасна (десятки хви-лин) гідротермальна обробка призводить до утворе-ння нанокристалічного анатазу.…”

Section: час та температура гідротермальної обробкиunclassified