Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

Tryba, Beata; Tygielska, M.; Colbeau‐Justin, Christophe; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Wróbel, Rafał; Żołnierkiewicz, G.; Guskos, N.

doi:10.1016/j.materresbull.2016.07.035

Cited by 29 publications

(13 citation statements)

References 41 publications

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“…After that the obtained gel was dried in a drier at 100 • C for 24 h and after grinding was subjected to calcination at various temperartures, from 200 to 500 • C for 1 h. The Reference 1 and 2 samples were prepared according to the same procedure without addition of ammonia water; the Reference 1 was prepared with addition of acetic acid during hydrolysis to obtain pH of sol-gel solution equaled 3. Both reference samples were calcinated at 400 • C in a muffle furnace for 1 h. Detailed characteristics of the reference samples was described in the previous paper [30].…”

Section: Preparation Of Nitrogen Modified Tio 2 Photocatalystmentioning

confidence: 99%

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Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

et al. 2018

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The electronic structure of N-TiO 2 samples prepared by a sol-gel method was investigated by EPR (Electronic Paramagnetic Resonance) measurements and the energy-resolved distribution of electron traps. In EPR spectra, some of the resonance lines assigned to paramagnetic species of nitrogen and Ti 3+ were detected. Sample prepared at 300 • C revealed the highest intensity line of the nitrogen paramagnetic centers, whereas that prepared at 400 • C showed a paramagnetic line for Ti 3+. Measurements of the electron trap distribution showed higher density of electron traps for sample prepared at 400 • C than that at 300 • C. Sample prepared at 300 • C, which revealed the highest amount of nitrogen built in the titania in the interstitial position was the most active under visible light. It was evidenced that photocatalytic decomposition of acetaldehyde was dependent strongly on the BET surface area and electrokinetic potential of the photocatalyst surface. The UV content in the fluorescent lamp affected the yield of acetaldehyde decomposition.

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Section: Preparation Of Nitrogen Modified Tio 2 Photocatalystmentioning

confidence: 99%

“…The samples were analyzed in the form of powders. The microwaves were generated by means of a Gunn diode in the Kα band (28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38). All experiments were carried out at 31.4 GHz.…”

Section: Materials Characteristicsmentioning

confidence: 99%

Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

et al. 2018

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“…There are various methods are available for the preparation of TiO2 powder. Among all methods, sol-gel are the most convenient due to the ability to control reaction at low temperature and able to design nanomaterial with demanded surface properties [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on Titanium Dioxide Synthesized by Sol-Gel Method

Banjuraizah¹,

Ong²,

Ahmad³

2018

IJCRSET

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In this paper, the effects of calcination temperatures on the sol-gel synthesized TiO2 powder were studied. TiO2 powder was prepared through sol-gel method and further heat treated by different calcination temperature of 400 °C, 500 °C, 600 °C and 700 °C. Thermal analysis of the dried TiO2 powder catalysts was carried out using DTA-DTG. While all treated powder were characterized by using XRD and SEM. Meanwhile the crystallite size of TiO2 samples increased as calcination temperature increased. The morphology of synthesized TiO2 also revealed the increment in particle size with increasing the calcinations temperature.

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“…Moreover, a high amount of oxygen vacancies and defects was found on the surface of the 0.25% Nd-TiO 2 (HT) sample. As previously mentioned, the presence of oxygen deficient centres on the surface and surface defects such as Ti 3+ can reduce the rate of electron–hole pair recombination [ 45 – 47 ]. Further, the light adsorption ability could be strongly related to the band-gap structure, which is affected by defects.…”

Section: Resultsmentioning

confidence: 99%

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

Parnicka

Mazierski

Grzyb

et al. 2018

Beilstein J. Nanotechnol.

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Nd-modified TiO2 photocatalysts have been obtained via hydrothermal (HT) and sol–hydrothermal (SHT) methods. The as-prepared samples were characterized by X-ray diffraction (XRD), BET surface area measurements, scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), luminescence spectroscopy and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the synthesized samples was evaluated by the degradation of phenol in aqueous solution under irradiation with UV–vis (λ > 350 nm) and vis (λ > 420 nm) light, as well as by the degradation of gaseous toluene under irradiation with vis (λmax = 415 nm) light. It was found that Nd-modified TiO2 is an efficient photocatalyst for the degradation of phenol and toluene under visible light. XPS analysis revealed that the photocatalyst prepared via HT method contains a three-times higher amount of hydroxy groups at the surface layer and a two-times higher amount of surface defects than that obtained by the SHT method. The photocatalytic efficiency of phenol and toluene degradation under vis irradiation in the presence of 0.25% Nd-TiO2(HT) reached 0.62 and 3.36 μmol·dm−1·min−1, respectively. Photocatalytic activity tests in the presence of Nd-TiO2 and scavenger confirm that superoxide radicals were responsible for the visible light-induced degradation of the model pollutant in aqueous solution.

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Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

Cited by 29 publications

References 41 publications

Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

Effect of Calcination Temperature on Titanium Dioxide Synthesized by Sol-Gel Method

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

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Influence of pH of sol-gel solution on phase composition and photocatalytic activity of TiO 2 under UV and visible light

Cited by 29 publications

References 41 publications

Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

Influence of an Electronic Structure of N-TiO2 on Its Photocatalytic Activity towards Decomposition of Acetaldehyde under UV and Fluorescent Lamps Irradiation

Effect of Calcination Temperature on Titanium Dioxide Synthesized by Sol-Gel Method

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO2

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Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂