Fine control of nanoparticle clustering within polymeric matrices can be tuned to enhance the physicochemical properties of the resulting composites, which are governed by the interplay of nanoparticle surface segregation and bulk clustering. To this aim, out-of-equilibrium strategies can be leveraged to program the multiscale organization of such systems. Here, we present experimental results indicating that bulk assembly of highly photoactive clusters of titanium dioxide nanoparticles within an in situ synthesized polysiloxane matrix can be thermally tuned. Remarkably, the controlled nanoparticle clustering results in improved degradation photocatalytic performances of the material under 1 sun toward methylene blue. The resulting coatings, in particular the 35 wt % TiO2-loaded composites, show a photocatalytic degradation of about 80%, which was comparable to the equivalent amount of bare TiO2 and two-fold higher with respect to the corresponding composites not subjected to thermal treatment. These findings highlight the role of thermally induced bulk clustering in enhancing photoactive nanoparticle/polymer composite properties.

Clara Chiappara, Giuseppe Arrabito, Vittorio Ferrara, Michelangelo Scopelliti, Giuseppe Sancataldo, Valeria Vetri, et al. (2021). Improved Photocatalytic Activity of Polysiloxane TiO2 Composites by Thermally Induced Nanoparticle Bulk Clustering and Dye Adsorption. LANGMUIR, 37(34), 1-12 [10.1021/acs.langmuir.1c01475].

Improved Photocatalytic Activity of Polysiloxane TiO2 Composites by Thermally Induced Nanoparticle Bulk Clustering and Dye Adsorption

Clara Chiappara;Giuseppe Arrabito;Vittorio Ferrara;Michelangelo Scopelliti;Giuseppe Sancataldo;Valeria Vetri;Delia Francesca Chillura Martino
;
Bruno Pignataro
2021-08-16

Abstract

Fine control of nanoparticle clustering within polymeric matrices can be tuned to enhance the physicochemical properties of the resulting composites, which are governed by the interplay of nanoparticle surface segregation and bulk clustering. To this aim, out-of-equilibrium strategies can be leveraged to program the multiscale organization of such systems. Here, we present experimental results indicating that bulk assembly of highly photoactive clusters of titanium dioxide nanoparticles within an in situ synthesized polysiloxane matrix can be thermally tuned. Remarkably, the controlled nanoparticle clustering results in improved degradation photocatalytic performances of the material under 1 sun toward methylene blue. The resulting coatings, in particular the 35 wt % TiO2-loaded composites, show a photocatalytic degradation of about 80%, which was comparable to the equivalent amount of bare TiO2 and two-fold higher with respect to the corresponding composites not subjected to thermal treatment. These findings highlight the role of thermally induced bulk clustering in enhancing photoactive nanoparticle/polymer composite properties.
16-ago-2021
Settore CHIM/01 - Chimica Analitica
Settore CHIM/02 - Chimica Fisica
Settore CHIM/03 - Chimica Generale E Inorganica
Clara Chiappara, Giuseppe Arrabito, Vittorio Ferrara, Michelangelo Scopelliti, Giuseppe Sancataldo, Valeria Vetri, et al. (2021). Improved Photocatalytic Activity of Polysiloxane TiO2 Composites by Thermally Induced Nanoparticle Bulk Clustering and Dye Adsorption. LANGMUIR, 37(34), 1-12 [10.1021/acs.langmuir.1c01475].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/517092
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