| publications-971 |
PEER REVIEWED ARTICLE |
2016 |
Maria Cantarella , Ruy Sanz , Maria Antonietta Buccheri , Francesco Ruffino , Giancarlo Rappazzo , Silvia Scalese , Giuliana Impellizzeri , Lucia Roma |
Immobilization of nanomaterials in PMMA composites for photocatalytic removal of dyes, phenols and bacteria from water |
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10.1016/j.jphotochem.2016.01.020 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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| publications-972 |
PEER REVIEWED ARTICLE |
2014 |
G. Impellizzeri , V. Scuderi , L. Romano , P. M. Sberna , E. Arcadipane , R. Sanz , M. Scuderi , G. Nicotra , M. Bayle , R. Carles , F. Simone , V. Pr |
Fe ion-implanted TiO2 thin film for efficient visible-light photocatalysis |
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10.1063/1.4901208 |
Uncategorized |
Wastewater Treatment Plants |
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This work shows the application of metal ion-implantation to realize an efficient second-generation TiO2 photocatalyst. High fluence Fe+ ions were implanted into thin TiO2 films and subsequently annealed up to 550 °C. The ion-implantation process modified the TiO2 pure film, locally lowering its band-gap energy from 3.2 eV to 1.6–1.9 eV, making the material sensitive to visible light. The measured optical band-gap of 1.6–1.9 eV was associated with the presence of effective energy levels in the energy band structure of the titanium dioxide, due to implantation-induced defects. An accurate structural characterization was performed by Rutherford backscattering spectrometry, transmission electron microscopy, Raman spectroscopy, X-ray diffraction, and UV/VIS spectroscopy. The synthesized materials revealed a remarkable photocatalytic efficiency in the degradation of organic compounds in water under visible light irradiation, without the help of any thermal treatments. The photocatalytic activity has been correlated with the amount of defects induced by the ion-implantation process, clarifying the operative physical mechanism. These results can be fruitfully applied for environmental applications of TiO2. |
316082 |
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| publications-973 |
PEER REVIEWED ARTICLE |
2015 |
Ruy Sanz , Lucia Romano , Massimo Zimbone , Maria Antonietta Buccheri , Viviana Scuderi , Giuliana Impellizzeri , Mario Scuderi , Giuseppe Nicotra , J |
UV-black rutile TiO2: An antireflective photocatalytic nanostructure |
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10.1063/1.4913222 |
Uncategorized |
Wastewater Treatment Plants |
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This work presents an experimental study on the specific quantitative contributions of antireflective and effective surface areas on the photocatalytic and antibacterial properties of rutile TiO2 nanospikes. They are studied when continuously distributed over the whole surface and when integrated into well-defined microstructures. The nanospikes were produced following MeV ion beam irradiation of bulk rutile TiO2 single crystals and subsequent chemical etching. The ion beam irradiation generated embedded isolated crystalline nanoparticles inside an etchable amorphous TiO2 layer, and nanospikes fixed to the not etchable TiO2 bulk substrate. The produced nanospikes are shown to resist towards aggressive chemical environments and act as an efficient UV antireflective surface. The photocatalytic activity experiments were performed under the ISO 10678:2010 protocol. The photonic and quantum efficiency are reported for the studied samples. The combined micro- and nanostructured surface triples the photonic efficiency compared to the initial flat surface. Results also revealed that the antireflective effect, due to the nanostructuring, is the dominating factor compared to the increase of surface area, for the observed photocatalytic response. The obtained results may be taken as a general strategy to design and precisely evaluate photoactive nanostructures. |
316082 |
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| publications-974 |
PEER REVIEWED ARTICLE |
2015 |
G. Impellizzeri , V. Scuderi , L. Romano , E. Napolitani , R. Sanz , R. Carles , V. Privitera |
C ion-implanted TiO2 thin film for photocatalytic applications |
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10.1063/1.4915111 |
Uncategorized |
Wastewater Treatment Plants |
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Third-generation TiO2 photocatalysts were prepared by implantation of C+ ions into 110 nm thick TiO2 films. An accurate structural investigation was performed by Rutherford backscattering spectrometry, secondary ion mass spectrometry, X-ray diffraction, Raman-luminescence spectroscopy, and UV/VIS optical characterization. The C doping locally modified the TiO2 pure films, lowering the band-gap energy from 3.3 eV to a value of 1.8 eV, making the material sensitive to visible light. The synthesized materials are photocatalytically active in the degradation of organic compounds in water under both UV and visible light irradiation, without the help of any additional thermal treatment. These results increase the understanding of the C-doped titanium dioxide, helpful for future environmental applications. |
316082 |
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| publications-975 |
PEER REVIEWED ARTICLE |
2014 |
F. Ruffino , G. Cacciato , M. G. Grimaldi |
Surface diffusion coefficient of Au atoms on single layer graphene grown on Cu |
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10.1063/1.4866876 |
Uncategorized |
Wastewater Treatment Plants |
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A 5 nm thick Au film was deposited on single layer graphene sheets grown on Cu. By thermal processes, the dewetting phenomenon of the Au film on the graphene was induced so to form Au nanoparticles. The mean radius, surface-to-surface distance, and surface density evolution of the nanoparticles on the graphene sheets as a function of the annealing temperature were quantified by scanning electron microscopy analyses. These quantitative data were analyzed within the classical mean-field nucleation theory so to obtain the temperature-dependent Au atoms surface diffusion coefficient on graphene: DS(T)=[(8.2±0.6)×10−8]exp[−(0.31±0.02eVat)/kT] cm2/s. |
316082 |
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| publications-976 |
PEER REVIEWED ARTICLE |
2016 |
G. Cacciato , F. Ruffino , M. Zimbone , R. Reitano , V. Privitera , M.G. Grimaldi |
Au thin films nano-structuration on polycrystalline anatase and rutile TiO2 substrates towards photocatalytic applications |
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10.1016/j.mssp.2015.07.074 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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| publications-977 |
PEER REVIEWED ARTICLE |
2016 |
M. Zimbone , G. Cacciato , M.A. Buccheri , R. Sanz , N. Piluso , R. Reitano , F. La Via , M.G. Grimaldi , V. Privitera |
Photocatalytical activity of amorphous hydrogenated TiO2 obtained by pulsed laser ablation in liquid |
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10.1016/j.mssp.2015.09.012 |
Data Management & Analytics |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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| publications-978 |
PEER REVIEWED ARTICLE |
2016 |
Enrica Arcadipane , Ruy Sanz , Maria Miritello , Giuliana Impellizzeri , Maria Grazia Grimaldi , Vittorio Privitera , Lucia Romano |
TiO2 nanowires on Ti thin film for water purification |
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10.1016/j.mssp.2015.07.055 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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| publications-979 |
PEER REVIEWED ARTICLE |
2016 |
Alessandro Di Mauro , Massimo Zimbone , Maria Elena Fragalà , Giuliana Impellizzeri |
Synthesis of ZnO nanofibers by the electrospinning process |
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10.1016/j.mssp.2015.08.003 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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| publications-980 |
PEER REVIEWED ARTICLE |
2016 |
V. Scuderi , G. Amiard , S. Boninelli , S. Scalese , M. Miritello , P.M. Sberna , G. Impellizzeri , V. Privitera |
Photocatalytic activity of CuO and Cu2O nanowires |
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10.1016/j.mssp.2015.08.008 |
Simulation & Modeling |
Wastewater Treatment Plants |
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No abstract available |
316082 |
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