Facile preparation of TiO2–polyvinyl alcohol hybrid nanoparticles with improved visible light photocatalytic activity

•Hybrid TiO2/PVA core/shell nanoparticles were prepared through a two step procedure.•TiO2–PVA samples were prepared based on different TiO2–PVA weight ratios.•All samples were characterized using XRD, TEM, FT-IR and BET analysis.•The photocatalytic performance was evaluated. Hybrid inorganic/organi...

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Bibliographic Details
Published in:Applied surface science 2015-03, Vol.331, p.292-298
Main Authors: Filippo, Emanuela, Carlucci, Claudia, Capodilupo, Agostina Lina, Perulli, Patrizia, Conciauro, Francesca, Corrente, Giuseppina Anna, Gigli, Giuseppe, Ciccarella, Giuseppe
Format: Article
Language:English
Subjects:
Agglomeration
Coating
Core–shell
Diffraction
Nanoparticles
Nanostructure
Photocatalysis
Polyvinyl alcohols
PVA
Titania
Titanium dioxide
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Summary:•Hybrid TiO2/PVA core/shell nanoparticles were prepared through a two step procedure.•TiO2–PVA samples were prepared based on different TiO2–PVA weight ratios.•All samples were characterized using XRD, TEM, FT-IR and BET analysis.•The photocatalytic performance was evaluated. Hybrid inorganic/organic core/shell nanoparticles were prepared through a two step synthesis procedure. In the first step, pure anatase TiO2 nanoparticles were synthesized though a rapid microwave assisted non-aqueous route. Then, the obtained titania nanoparticles were coated with polyvinyl alcohol (PVA) using a simple solution method followed by relatively low temperature treatment. The PVA-coated titania nanoparticles samples were prepared at different TiO2–PVA weight ratio and they were characterized using X-Ray diffraction, transmission electron microscopy, infrared spectroscopy and Brunauer–Emmett–Teller (BET) analysis. Photocatalytic performance was also evaluated for all samples and the results indicated that TiO2:PVA weight ratio was a key factor to obtain an improvement of the photocatalytic activity with respect to bare TiO2 nanoparticles, since PVA concentration influenced the surface area and the aggregation of nanoparticles and the thickness of the coating layer. This inexpensive system provides a simple, quick and effective approach which allows to obtain core/shell hybrid nanostructures.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2014.12.112