C ion-implanted TiO2 thin film for photocatalytic applications

Impellizzeri, G.; Scuderi, Viviana; Romano, Lucia; Napolitani, E.; Sanz, R.; Carles, R.; Privitera, V.

doi:10.1063/1.4915111

Cited by 37 publications

(12 citation statements)

References 32 publications

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“…The heterogeneous photocatalysis is effective in degrading a wide range of refractory organics, eventually mineralizing them in innocuous carbon dioxide and water4567891011. Among the semiconductor photocatalysts, ZnO has received a great interest in the field of photocatalytic technology.…”

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confidence: 99%

Novel synthesis of ZnO/PMMA nanocomposites for photocatalytic applications

Mauro

Cantarella

Nicotra

et al. 2017

Sci Rep

149

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The incorporation of nanostructured photocatalysts in polymers is a strategic way to obtain novel water purification systems. This approach takes the advantages of: (1) the presence of nanostructured photocatalyst; (2) the flexibility of polymer; (3) the immobilization of photocatalyst, that avoids the recovery of the nanoparticles after the water treatment. Here we present ZnO-polymer nanocomposites with high photocatalytic performance and stability. Poly (methyl methacrylate) (PMMA) powders were coated with a thin layer of ZnO (80 nm thick) by atomic layer deposition at low temperature (80 °C). Then the method of sonication and solution casting was performed so to obtain the ZnO/PMMA nanocomposites. A complete morphological, structural, and chemical characterization was made by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses. The remarkable photocatalytic efficiency of the nanocomposites was demonstrated by the degradation of methylene blue (MB) dye and phenol in aqueous solution under UV light irradiation. The composites also resulted reusable and stable, since they maintained an unmodified photo-activity after several MB discoloration runs. Thus, these results demonstrate that the proposed ZnO/PMMA nanocomposite is a promising candidate for photocatalytic applications and, in particular, for novel water treatment.

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confidence: 99%

Novel synthesis of ZnO/PMMA nanocomposites for photocatalytic applications

Mauro

Cantarella

Nicotra

et al. 2017

Sci Rep

149

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“…According to the Langmuir-Hinshelwood model, we also evaluated the photocatalytic reaction rate, k, given by the following equation: ln(C/C 0 ) = −kt, where t is the time 41 . The values of the reaction rate k reported in the ordinate axis are normalized to the k value found in the absence of any catalyst materials (k/k MB ).…”

Section: Resultsmentioning

confidence: 99%

Freestanding photocatalytic materials based on 3D graphene and polyporphyrins

Ussia

Bruno

Spina

et al. 2018

Sci Rep

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A new concept in the formulation of hybrid nanostructured materials combining high quality graphene 3D supported by Nickel foam and polyporphyrins for visible light photocatalytic application is here reported. Our innovative approach involves the development of a freestanding device able to: i) offer a high surface area to bind the photosensitizers by π-π interactions, and ii) enhance stability and photocatalytic efficiency by using cyclic porphyrin polymers. For these purposes, homo- and co-polymerization reactions by using different porphyrin (free or zinc complexed) monomers were performed. The microscopic structures and morphology of graphene polymer nanocomposites were investigated by using Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Atomic Force Microscopy (AFM). Finally, photocatalytic activity under visible light irradiation of the obtained nanocomposites was tested, by using methylene blue (MB) as organic pollutant. The obtained data suggested that hindered cyclic polymeric structures stacked on graphene surface by non-covalent interactions, restrict the formation of non photoactive aggregates and, as a consequence, induce an enhancement of photocatalytic activity. Remarkably, our systems show a degradation efficiency in the visible-light range much higher than other similar devices containing nanoporphyrin units reported in literature.

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“…Carbon ion sources are widely used in many applications including surface hardening of iron, 1 the growth of diamondlike thin films, 2 carbon ion radiotherapy, 3 bandgap modification of TiO 2 , 4 and synthesis of multilayer graphene. 5 The carbon multicharged ions (MCIs) have several advantages compared to the singly charged carbon ions.…”

Section: Introductionmentioning

confidence: 99%

Carbon multicharged ion generation from laser-spark ion source

Rahman

Balki

Elsayed-Ali

2019

Review of Scientific Instruments

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Multicharged carbon ions are generated by using a laser-assisted spark-discharge ion source. A Q-switched Nd:YAG laser pulse (1064 nm, 7 ns, ≤ 4.5 × 10 9 W/cm 2 ) focused onto the surface of a glassy carbon target results in its ablation. The spark-discharge (∼1.2 J energy, ∼1 μs duration) is initiated along the direction of the plume propagation between the target surface and a grounded mesh that is parallel to the target surface. Ions emitted from the laser-spark plasma are detected by their time-of-flight using a Faraday cup. The ion energy-to-charge ratio is analyzed by a three-mesh retarding field analyzer. In one set of experiments, the laser plasma is generated by target ablation using a 50 mJ laser pulse. In another set of experiments, ∼1.2 J spark-discharge energy is coupled to the expanding plasma to increase the plasma density and temperature that results in the generation of carbon multicharged ions up to C 6+ . A delay-generator is used to control the time delay between the laser pulse and the thyratron trigger. Ion generation from a laser pulse when a high DC voltage is applied to the target is compared to that when a spark-discharge with an equivalent pulsed voltage is applied to the target. The laser-coupled spark-discharge (7 kV peak voltage, 810 A peak current) increases the maximum detected ion charge state from C 4+ to C 6+ , accompanied by an increase in the ion yield by a factor of ∼6 compared to applying 7.0 kV DC voltage to the target.Published under license by AIP Publishing. https://doi.

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C ion-implanted TiO2 thin film for photocatalytic applications

Cited by 37 publications

References 32 publications

Novel synthesis of ZnO/PMMA nanocomposites for photocatalytic applications

Novel synthesis of ZnO/PMMA nanocomposites for photocatalytic applications

Freestanding photocatalytic materials based on 3D graphene and polyporphyrins

Carbon multicharged ion generation from laser-spark ion source

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