Photocatalytic activity of TiO2-embedded fluorinated transparent coating for oxidation of hydrosoluble pollutants in turbid suspensions

Persico, Federico; Sansotera, Maurizio; Bianchi, Claudia L.; Cavallotti, Carlo; Navarrini, W.

doi:10.1016/j.apcatb.2015.01.033

Cited by 18 publications

(15 citation statements)

References 38 publications

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“…Advanced oxidation processes (AOPs) have been widely recognized as alternatives to the conventional methods for the removal of organic pollutants from water and wastewater (Persico et al 2015;Vasileiadis et al 2015;Martins and Quinta-Ferreira 2013;Luo et al 2014;Lázár et al 2015;Cheng et al 2015;Ahmed et al 2011). AOPs can be broadly defined as aqueous phase oxidation methods based primarily on hydroxyl radicals, HO • , in the mechanism leading to the destruction of the pollutant compounds (Litter and Quici 2010;Lydakis-Simantiris et al 2010;Hu et al 2015;Jin et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Catalytic Studies of a Supported Photocatalyst Produced from Petrochemical Residue in the Photocatalytic Degradation of Dexamethasone and Guaifenesin Drugs

Silva

Lansarin

Santos

et al. 2016

Water Air Soil Pollut

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Dexamethasone and guaifenesin were comparatively degraded under UV and visible radiation in the presence of a supported photocatalyst generated from petrochemical residue. For comparative reasons, photochemical tests were also conducted in the presence of commercial titania (P25). The photoelectrochemical behavior of the supported photocatalyst was examined using cyclic voltammetry and differential pulse voltammetry in the dark and under LED irradiation. This photodegradation study indicates the highest drug degradation values were observed for guaifenesin under UV (48.6 %) and visible (45.2 %) radiation with the synthesized photocatalyst. Under the same conditions, the commercial P25 catalyst achieved 66.3 and 50.2 % of the degradation under UV and visible radiation, respectively. Exploratory tests with tap water samples revealed that the system may be sensitive to other analytes present in these environmental samples.

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Section: Introductionmentioning

confidence: 99%

Electrochemical and Catalytic Studies of a Supported Photocatalyst Produced from Petrochemical Residue in the Photocatalytic Degradation of Dexamethasone and Guaifenesin Drugs

Silva

Lansarin

Santos

et al. 2016

Water Air Soil Pollut

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“…In particular, amorphous perfluoropolymers showed the highest chemical stability and, due to their high UV transparency and high gas permeability, emerged as best candidate class of materials for the fabrication of TiO2-embedding matrices [40,41]. Recently, a multilayered perfluorinated coating based on amorphous and low-crystalline fluoropolymers with immobilized TiO2 was applied in a continuous photocatalytic apparatus for water remediation [42]. In this application, the multilayered coating comprised an ionomeric layer of perfluorosulfonic acid (PFSA) polymer in order to optimize the interaction between the catalyst and the polluted aqueous solution [42].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a multilayered perfluorinated coating based on amorphous and low-crystalline fluoropolymers with immobilized TiO2 was applied in a continuous photocatalytic apparatus for water remediation [42]. In this application, the multilayered coating comprised an ionomeric layer of perfluorosulfonic acid (PFSA) polymer in order to optimize the interaction between the catalyst and the polluted aqueous solution [42].…”

Section: Introductionmentioning

confidence: 99%

Absorption and photocatalytic degradation of VOCs by perfluorinated ionomeric coating with TiO2 nanopowders for air purification

Sansotera

Kheyli

Baggioli

et al. 2019

Chemical Engineering Journal

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In this work, we propose a transparent multilayered perfluoropolymeric coating as immobilization method for TiO2 nanoparticles, and evaluate its suitability in the gas phase photocatalytic degradation of six different volatile organic compounds. The coating was made of a layer of TiO2containing perfluorosulfonic acid polymer on a layer of perfluorinated amorphous polymer. The chemical stability of perfluoropolymeric materials to UV radiation and UV-activated TiO2 overcomes the possible degradation of the polymeric immobilization system which is typical of more traditional polymeric coatings. Moreover, the TiO2-containing ionomeric perfluorosulfonic layer worked as selective membrane for pollutants absorption and catalyst preservation, depending on the interactions between the superacidic polar heads of the ionomer and the pollutants, in particular those capable of hydrogen bonding. Gas-phase photocatalytic degradation tests were performed using pentane, methanol, 2-propanol, toluene, dichloromethane and pyridine as reference volatile organic pollutants, thus ranging on different polarity properties. Results indicate performances comparable to other approaches reported in the literature and show a strong influence of both atmospheric conditions (namely, humidity) and pollutant nature-polarity, proticity-on the actual kinetics of photodegradation, also depending on the interactions regulating the affinity between the ionomeric layer of the coating and pollutants. The high potential of the coating in the photodegradation was confirmed by the observed values of the photoabatement rates: all approximatively above 10-5 s-1 and maximum for alcohols (1.4 × 10-4 and 1.7 × 10-4 s-1 in dry and humid conditions, respectively).

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“…microorganisms, flocculation or chlorination); [45,46] the concentration of such Azo-dyes can reach 500 ppm in in textile effluent. [47] Advanced oxidation processes, including Fenton oxidation, [48] photocatalytic oxidation, [49,50] photo-Fenton oxidation, [51] catalytic wet air oxidation, [52] electrocatalytic oxidation, [53] electro-Fenton oxidation [54] are promising solutions for the oxidative removal of persistent organic compounds from wastewater. However, while Fenton-type AOPs exhibit high removal efficiencies (100 mg/L) for diverse ROCs including cyanotoxins, they share a common high demand for H 2 O 2 (~2.1 kg per kg of biological/chemical oxygen demand).…”

Section: Introductionmentioning

confidence: 99%

Single atom Cu(I) promoted mesoporous titanias for photocatalytic Methyl Orange depollution and H2 production

Trofimovaite

Parlett

Kumar

et al. 2018

Applied Catalysis B: Environmental

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Tailoring the physicochemical properties and hence reactivity of semiconductor photocatalysts in a predictable fashion, remains a challenge to their industrial application. Here we demonstrate the striking promotional effect of incorporating single Cu(I) atoms, on aqueous phase photocatalytic dye degradation and H 2 production over surfactant-templated mesoporous TiO 2 . X-ray absorption spectroscopy reveals that ultra-low concentrations of copper (0.02-0.1 wt%) introduced into the mesoporous TiO 2 surface create isolated Cu (I) species which suppress charge recombination, and confer a six-fold photocatalytic promotion of Methyl Orange degradation and four-fold enhancement of H 2 evolution. The impact of mesopore structure and photophysical properties on photocatalytic activity is also quantified for the first time: calcination increases mesopore size and nanocrystalline order, and induces an anataserutile phase transition that is accompanied by a decrease in the optical band gap, increased charge carrier lifetime, and a concomitant significant activity enhancement.

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Photocatalytic activity of TiO2-embedded fluorinated transparent coating for oxidation of hydrosoluble pollutants in turbid suspensions

Cited by 18 publications

References 38 publications

Electrochemical and Catalytic Studies of a Supported Photocatalyst Produced from Petrochemical Residue in the Photocatalytic Degradation of Dexamethasone and Guaifenesin Drugs

Electrochemical and Catalytic Studies of a Supported Photocatalyst Produced from Petrochemical Residue in the Photocatalytic Degradation of Dexamethasone and Guaifenesin Drugs

Absorption and photocatalytic degradation of VOCs by perfluorinated ionomeric coating with TiO2 nanopowders for air purification

Single atom Cu(I) promoted mesoporous titanias for photocatalytic Methyl Orange depollution and H2 production

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