| Autor: |
Barakat NAM; Chemical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt., Tolba GMK; Chemical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt., Khalil KA; Department of Mechanical & Nuclear Engineering, College of Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates. |
| Jazyk: |
angličtina |
| Zdroj: |
Polymers [Polymers (Basel)] 2022 Jan 27; Vol. 14 (3). Date of Electronic Publication: 2022 Jan 27. |
| DOI: |
10.3390/polym14030523 |
| Abstrakt: |
In this study, hydrogen generation was performed by utilizing methylene blue dye as visible-light photosensitizer while the used catalyst is working as a transfer bridge for the electrons to H + /H 2 reaction. Silica NPs-incorporated TiO 2 nanofibers, which have a more significant band gap and longer electrons lifetime compared to pristine TiO 2 , were used as a catalyst. The nanofibers were prepared by electrospinning of amorphous SiO 2 NPs/titanium isopropoxide/poly (vinyl acetate)/N, N-dimethylformamide colloid. Physicochemical characterizations confirmed the preparation of well morphology SiO 2 -TiO 2 nanofibers with a bandgap energy of 3.265 eV. Under visible light radiation, hydrogen and oxygen were obtained in good stoichiometric rates (9.5 and 4.7 mL/min/gcat, respectively) without any considerable change in the dye concentration, which proves the successful exploitation of the dye as a photosensitizer. Under UV irradiation, SiO 2 NPs incorporation distinctly enhanced the dye photodegradation, as around 91 and 94% removal efficiency were obtained from TiO 2 nanofibers containing 4 and 6 wt% of the used dopant, respectively, within 60 min. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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