Synthesis and photocatalytic activity of mesoporous anatase prepared from tetrabutylammonium-titania composites

Saadoun, L.; Ayllón, José A.; Jiménez-Becerril, J.; Peral, José; Domènech, Xavier; Rodrı́guez-Clemente, R.

doi:10.1016/s0025-5408(00)00204-x

Cited by 49 publications

(32 citation statements)

References 26 publications

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“…Grayish color of the samples was ascribed to carbonaceous deposits derived from the decomposition of organics and encapsulated by the titania matrix, making its decomposition difficult. 25 This observation is in agreement with the TGA results showing the presence of organic residue thermal decomposition products at high temperatures. Figure 6 presents the nitrogen adsorption/desorption isotherms and pore size distribution of the samples 0/1, 1/1 and 2/1 calcined at 350 °C for 2 h. The isotherms exhibited a type IV isotherm with H2 hysteresis loops, suggesting that the material is mesoporous.…”

Section: Resultssupporting

confidence: 92%

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Sol-Gel Preparation of Nanocrystalline Titania Photocatalyst for Water Treatment Using N-Butoxide Modified With Ethyl Acetoacetate in Various Amounts

Kurajica¹,

Minga²,

Mužina³

2017

ECB

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Sols prepared by chelation of titanium n-butoxide, Ti(OC4H9)4, with ethyl acetoacetate, C6H10O3, in various ratios were slowly hydrolyzed, and the obtained gels were investigated using Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis. The gels were thermally treated at 350 °C, and the products were investigated using X-ray diffraction, N2 gas adsorption-desorption isotherms and diffuse reflectance UV-Vis spectroscopy. Photocatalytic activity assessment was obtained through degradation process of methylene blue under UV light. From the results obtained, the relationships between gel structure and titania crystallite size, specific surface area, bandgap, and photocatalytic activity, as the most relevant parameters, were discussed. The alkoxide modification affected the gel structure, as well as the properties of the final material. However, the sample prepared from unmodified Ti-n-butoxide yielded the most favorable properties.

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Section: Resultssupporting

confidence: 92%

“…21,25 The peak in the XRD pattern of sample 2/1 shows slightly increased intensity in comparison with the peak of sample 1/1. This is probably the consequence of a better ordering of mesostructural units.…”

Section: Resultsmentioning

confidence: 96%

Sol-Gel Preparation of Nanocrystalline Titania Photocatalyst for Water Treatment Using N-Butoxide Modified With Ethyl Acetoacetate in Various Amounts

Kurajica¹,

Minga²,

Mužina³

2017

ECB

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“…TiO 2 photocatalysts have been prepared by several routes and methods, as depicted by Watson et al (2003), Cólon et al (2002), and Saadoun et al (2000). The photocatalysts usually used have a specific surface area of approximately 50 m 2 g -1 , e.g.…”

Section: Introductionmentioning

confidence: 99%

A comparison between bulk and supported TiO2 photocatalysts in the degradation of formic acid

Torres

Azevedo

Resende

et al. 2007

Braz. J. Chem. Eng.

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-The photocatalytic activity of bulk and supported TiO 2 catalysts were tested using formic acid as a probe molecule. The supported catalysts tested were prepared by impregnation using aluminum oxide (Al 2 O 3 ) as the support and the bulk catalysts by precipitation, both in sol-gel systems. For purposes of comparison, a photocatalyst supplied by DEGUSSA (P25) was also tested. The photolysis rate was found to be less significant than the photocatalytic rate. The Langmuir-Hinshelwood model was adopted and its constants were estimated and used to compare the various catalysts. The supported catalysts showed no significant activity, in spite of their high specific surface area. The bulk catalysts tested showed the highest photocatalytic rates. The adsorption constants determined experimentally were different from the ones estimated based on the kinetic experiments. The parameter estimation procedures tested were used to clarify this issue.

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“…Since the low cost solar cells have been the subject of intensive research work for the last three decades [3], Michael Gratzel and coworkers at the Ecole Polytechnique Federale de Lausene [4] succeeded to produce "Gratzel Cell" or which known as dye-sensitized solar cells that imitate the photosynthesis process by sensitizing a nanocrystalline TiO 2 film using novel Ru bipyridl complex [5]. (Table I shown the comparison between two solar cells).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, titanium dioxide (TiO 2 ) has attracted attention from researchers worldwide due to its potential applications in environmental protection and energy generation [5] and has been applied largely in DSSC due to its nanocrystalline mesoporous nature that translates to high surface area for dye adsorption. The absorbed dye molecules can then be excited by the solar energy to generate electron-hole pairs that are subsequently separated and transported within the lattice of TiO 2 [7].…”

Section: Introductionmentioning

confidence: 99%

The Basic Research on the Dye-Sensitized Solar Cells (DSSC)

Zulkifili¹,

Kento²,

Daiki³

et al. 2015

JOCET

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Abstract-The dye-sensitized solar cell (DSSC) is a new type of solar cell which converts the visible light into electricity by using the photoelectrochemical system. It is based on the sensitization of the wide band gap semiconductors which is made up of a sandwich-liked structure that consists of a semiconductor formed between a photo-sensitized anode and an electrolyte. In this research, we focused on the TiO 2 photoelectrode by evaluating the particle size of titania, determining the effects of molecular binder PEG towards TiO 2 paste preparation, as well as the effects of natural dye by comparing the blueberry, gardenia blue and yellow and red yeast dye, and evaluating the effect of the multilayer of TiO 2 .

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Synthesis and photocatalytic activity of mesoporous anatase prepared from tetrabutylammonium-titania composites

Cited by 49 publications

References 26 publications

Sol-Gel Preparation of Nanocrystalline Titania Photocatalyst for Water Treatment Using N-Butoxide Modified With Ethyl Acetoacetate in Various Amounts

Sol-Gel Preparation of Nanocrystalline Titania Photocatalyst for Water Treatment Using N-Butoxide Modified With Ethyl Acetoacetate in Various Amounts

A comparison between bulk and supported TiO2 photocatalysts in the degradation of formic acid

The Basic Research on the Dye-Sensitized Solar Cells (DSSC)

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