| Title | Gram-scale synthesis of UV-vis light active plasmonic photocatalytic nanocomposite based on TiO2/Au nanorods for degradation of pollutants in water |
| Abstract | Semiconductor/metal nanocomposites based on anatase TiO2 nanoparticles and Au nanorods (TiO2/AuNRs) were prepared by means of a co-precipitation method and subsequently calcinated at increasing temperature (from 250° to 650°C) obtaining up to 20 grams of catalysts. The structure and the morphology of the obtained nanocomposite material were comprehensively characterized by means of electron microscopy (SEM and TEM) and X-ray diffraction techniques. The photocatalytic performance of the TiO2/AuNRs nanocomposites was investigated as a function of the calcination temperature in experiment of degradation of water pollutants under both UV and UV-Vis irradiation, Photocatalytic experiments under UV irradiation were performed by monitoring spectrophotometrically the decolouration of a target compound (methylene blue, MB) in aqueous solution. UV-Visible light irradiation was, instead, used for testing the photocatalytic removal of an antibiotic molecule, Nalidixic acid, by monitoring the degradation process by HPLC-MS analysis. Interestingly, TiO2/AuNRs calcined at 450°C was up to 2.5 and 3.2 times faster than TiO2P25 Evonik, that is a commercially available reference material, in the photocatalytic degradation of the Methylene Blue and the Nalidixic Acid, under UV and visible light, respectively. The same nanocomposite material showed a photocatalytic degradation rate for the two target compounds up to 13 times faster than the bare TiO2-based catalysts.
The obtained results are explained on the basis of the structure and morphology of the nanocomposites, that could be tuned according to the preparative conditions. The role played by the plasmonic domain in the heterostructured materials, either under UV and UV-Visible illumination, is also highlighted and discussed.
The overall results indicate that the high photoactivity of TiO2/AuNRs in the visible range can be profitably exploited in photocatalytic applications, thanks also to the scalability of the proposed synthetic route, thus ultimately envisaging potential innovative solution for environmental remediation. |
| Source | Applied catalysis. B, Environmental (Print) 243, pp. 604–613 |
| Keywords | Gold nanorodsNanocompositePlasmonic photocatalystTitanium dioxideUV-vis photoactivation |
| Journal | Applied catalysis. B, Environmental (Print) |
| Editor | Elsevier, Amsterdam ;, Paesi Bassi |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.apcatb.2018.11.002 |
| Authors | Truppi, A.; Petronella, F.; Placido, T.; Margiotta, V.; Margiotta, V.; Lasorella, G.; Giotta, L.; Giannini, C.; Sibillano, T.; Murgolo, S.; Mascolo, G.; Agostiano, A.; Agostiano, A.; Curri, M. L.; Comparelli, R. |
| Text | 394378 2019 10.1016/j.apcatb.2018.11.002 Scopus 2 s2.0 85056447330 Science direct Elsevier S092633731831052X Google Scholar 4537722427691430479 ISI Web of Science WOS 000453616800062 Gold nanorods Nanocomposite Plasmonic photocatalyst Titanium dioxide UV vis photoactivation Gram scale synthesis of UV vis light active plasmonic photocatalytic nanocomposite based on TiO2/Au nanorods for degradation of pollutants in water Truppi, A.; Petronella, F.; Placido, T.; Margiotta, V.; Margiotta, V.; Lasorella, G.; Giotta, L.; Giannini, C.; Sibillano, T.; Murgolo, S.; Mascolo, G.; Agostiano, A.; Agostiano, A.; Curri, M. L.; Comparelli, R. Consiglio Nazionale delle Ricerche; Universita degli Studi di Bari; Universita del Salento; Istituto di Cristallografia; Istituto di Ricerca Sulle Acque, Bari Semiconductor/metal nanocomposites based on anatase TiO2 nanoparticles and Au nanorods TiO2/AuNRs were prepared by means of a co precipitation method and subsequently calcinated at increasing temperature from 250° to 650°C obtaining up to 20 grams of catalysts. The structure and the morphology of the obtained nanocomposite material were comprehensively characterized by means of electron microscopy SEM and TEM and X ray diffraction techniques. The photocatalytic performance of the TiO2/AuNRs nanocomposites was investigated as a function of the calcination temperature in experiment of degradation of water pollutants under both UV and UV Vis irradiation, Photocatalytic experiments under UV irradiation were performed by monitoring spectrophotometrically the decolouration of a target compound methylene blue, MB in aqueous solution. UV Visible light irradiation was, instead, used for testing the photocatalytic removal of an antibiotic molecule, Nalidixic acid, by monitoring the degradation process by HPLC MS analysis. Interestingly, TiO2/AuNRs calcined at 450°C was up to 2.5 and 3.2 times faster than TiO2P25 Evonik, that is a commercially available reference material, in the photocatalytic degradation of the Methylene Blue and the Nalidixic Acid, under UV and visible light, respectively. The same nanocomposite material showed a photocatalytic degradation rate for the two target compounds up to 13 times faster than the bare TiO2 based catalysts. The obtained results are explained on the basis of the structure and morphology of the nanocomposites, that could be tuned according to the preparative conditions. The role played by the plasmonic domain in the heterostructured materials, either under UV and UV Visible illumination, is also highlighted and discussed. The overall results indicate that the high photoactivity of TiO2/AuNRs in the visible range can be profitably exploited in photocatalytic applications, thanks also to the scalability of the proposed synthetic route, thus ultimately envisaging potential innovative solution for environmental remediation. 243 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85056447330 origin=inward Truppi et al Truppi et al APCB 2019.pdf Gram scale synthesis of UV visible light active photocatalytic nanocomposite based on TiO2/Au nanorods for degradation of pollutants in water This is the Submitted Manuscript version of an article accepted for publication in Catalysis Today. Elsevier is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https //doi.org/10.1016/j.apcatb.2018.11.002 Truppi et al APCB 2019_sub.pdf Articolo in rivista Elsevier 0926 3373 Applied catalysis. B, Environmental Print Applied catalysis. B, Environmental Print Appl. catal., B Environ. Print Applied catalysis. Print angela.agostiano AGOSTIANO ANGELA tizianaplacido PLACIDO TIZIANA francesca.petronella PETRONELLA FRANCESCA sapia.murgolo MURGOLO SAPIA MARGIOTTA VALERIO alessandratruppi TRUPPI ALESSANDRA giovanni.lasorella LASORELLA GIOVANNI marialucia.curri CURRI MARIA LUCIA cinzia.giannini GIANNINI CINZIA roberto.comparelli COMPARELLI ROBERTO teresa.sibillano SIBILLANO TERESA giuseppe.mascolo MASCOLO GIUSEPPE InnovaConcrete Innovative materials and techniques for the conservation of 20th century concrete based cultural heritage |
