Title
Functional titania–silica/chlorophyllin hybrids: design, fabrication, comprehensive physicochemical characteristic and photocatalytic test
Authors
[ 1 ] Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ 2 ] Instytut Inżynierii Materiałowej, Wydział Budowy Maszyn i Zarządzania, Politechnika Poznańska | [ P ] employee
Scientific discipline (Law 2.0)
Year of publication
2019
Published in
Article type
scientific article
Publication language
english
Keywords
EN
- chlorophyllin
- titania–silica
- hybrid system
- sol–gel method
- adsorption
- photocatalysis
Abstract
EN Chlorophyllin (which was used as sensitizer) was adsorbed onto a synthetic titania–silica oxide system, prepared via a sol–gel method. It was investigated how the adsorption process was affected by the initial concentration of chlorophyllin and the contact time of the solution. The physicochemical and structural properties of the inorganic support were comprehensively analyzed, including determination of the dispersive properties and morphology of the material (particle size distribution, SEM image), crystalline structure (XRD), chemical composition (EDS), parameters of the porous structure (low-temperature N2 sorption) and thermal stability (TGA/DTA). The effectiveness of chlorophyllin adsorption on TiO2–SiO2 was examined by Fourier transform infrared spectroscopy. The degree of coverage of the inorganic support with chlorophyllin was calculated from the Berendsen and de Golan equation based on BET and elemental analysis results. The kinetics of the adsorption of chlorophyllin onto the synthetic titania–silica oxide system were also determined. The experimental data correspond directly to a pseudo-second-order model. Moreover, the photocatalytic activity of selected TiO2–SiO2/chlorophyllin hybrids with respect to the decomposition of C.I. Basic Violet 10 dye was investigated. It was found that the titania–silica hybrids conjugated with chlorophyllin exhibited higher photocatalytic activity in the degradation of C.I. Basic Violet 10 than the pure TiO2–SiO2 material. Moreover, the kinetics of the photocatalytic degradation of selected organic compound was determined based on the Langmuir–Hinshelwood equation, assuming the pseudo-first-order reaction.
Date of online publication
19.02.2019
Pages (from - to)
485 - 499
License type
CC BY (attribution alone)
Open Access Mode
czasopismo hybrydowe
Open Access Text Version
final published version
Date of Open Access to the publication
in press
Full text of article
Access level to full text
public
Ministry points / journal
70
Ministry points / journal in years 2017-2021
70
Impact Factor
1,949
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