期刊
POLYMERS
卷 14, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/polym14030523
关键词
photosensitizer; hydrogen; water photo splitting; electrospinning; silica nanoparticles
资金
- University of Sharjah [19020408135]
In this study, hydrogen generation using methylene blue dye as a visible-light photosensitizer and incorporation of silica nanoparticles into titanium dioxide nanofibers for enhanced dye degradation under UV irradiation were successfully carried out.
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 TiO2 nanofibers, which have a more significant band gap and longer electrons lifetime compared to pristine TiO2, were used as a catalyst. The nanofibers were prepared by electrospinning of amorphous SiO2 NPs/titanium isopropoxide/poly (vinyl acetate)/N, N-dimethylformamide colloid. Physicochemical characterizations confirmed the preparation of well morphology SiO2-TiO2 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, SiO2 NPs incorporation distinctly enhanced the dye photodegradation, as around 91 and 94% removal efficiency were obtained from TiO2 nanofibers containing 4 and 6 wt% of the used dopant, respectively, within 60 min.
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