N‐doped <scp>TiO<sub>2</sub></scp>/s‐<scp>PS</scp> aerogels for photocatalytic degradation of organic dyes in wastewater under visible light irradiation

Vaiano, Vincenzo; Sacco, Olga; Sannino, Diana; Ciambelli, Paolo; Longo, Simona; Venditto, Vincenzo; Guerra, Gaetano

doi:10.1002/jctb.4372

Cited by 93 publications

(51 citation statements)

References 40 publications

(52 reference statements)

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“…To extend the TiO 2 absorption into the visible range, several laboratories have recently reported TiO 2 -F and TiO 2 -N doped PS films prepared by colloidal methods degrading organic compounds under sunlight light within a few hours J. K. Zhou et al, report degradation of MB [9], K. M. Parida et al, report degradation of methyl-orange (MO) and MB, an anionic and a cationic dye [10]. V. Viano et al, report the degradation of MB [11], L. Huang et al, [12] reports MO degradation and Z. Zheng et al, [13] et al, have reported Cu(I)O and Cu(II)O active in the photocatalytic degradation of pollutants/dyes under visible light up to 680 nm.…”

Section: Introductionmentioning

confidence: 99%

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

et al. 2017

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a b s t r a c tThis study reports on a Cu-sputtered film on polystyrene (PS) leading to the discoloration/degradation of methylene blue (MB) under low intensity solar simulated irradiation. Direct current magnetron sputtering (DCMS) was used to graft uniform, adhesive Cu/Cu oxides on the polystyrene substrate. The kinetics of Cu-PS mediated MB-discoloration adding H 2 O 2 was observed to take place within 90-120 min. The surface potential and pH variation was followed on the Cu-PS surface during MB-discoloration. Insight is provided for the observed changes relating them to the dye discoloration mechanism. The concentration, mean-free path and lifetime of the oxidative radical leading to MB-degradation were estimated. The Cu/Cu-oxides on the PS were characterized by X-ray diffraction (XRD). X-ray photoelectron spectroscopy (XPS) evidence for redox catalysis involving Cu(I)/Cu(II)-species was detected during MB-discoloration. Also by XPS the surface atomic percentage concentration was determined for the topmost Cu-PS layers. The Cu-PS coatings were also investigated for their optical and crystallographic properties.

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Section: Introductionmentioning

confidence: 99%

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

et al. 2017

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“…In the presence of oxygen and UV irradiation, organic substrates can be decomposed to CO 2 , H 2 O, or mineralized acids on the surface of photocatalysts [7,8]. Photocatalysts have often been used in two forms: suspended slurries in aqueous solutions [9,10] and immobilized powders or films on inert supports [11,12].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic properties of TiO2-functionalized tiles: influence of ceramic substrate

et al. 2014

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To confer self-cleaning properties to ceramic tiles through photocatalytic phenomena, TiO 2 is deposited as thin films on their surface. However, photocatalytic properties could be strongly influenced by physico-chemical characteristics of the ceramic support. For this reason, this investigation was aimed to study the influence of porosimetric characteristics of different ceramic tiles on adsorption and photocatalytic activity induced by deposited TiO 2 film in the presence of UV light. Experimental data in dark conditions showed that the porosity of the support strongly influenced the adsorption phenomenon of methylene blue (MB). Porosimetric characteristic of samples were tested by Hg intrusion. Higher porosity of the ceramic substrate increased the amount of MB adsorbed. On the contrary, photocatalytic tests have evidenced that a lower porosity of the support determined a higher MB discoloration rate. These results could be explained considering the MB internal diffusion phenomena limit the overall activity inside the porosimetric structure of functionalized tiles.

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“…In order to support a sustainable hydrogen economy, it is crucial to produce hydrogen cleanly and renewably. Typically, heterogeneous photocatalysis is studied with the aim of removing organic pollutants from wastewater [19,20] through oxidation reactions which can finally result in the production of CO 2 and water. An interesting approach is to explore, in parallel to wastewater treatment, opportunities of mass recovery which can be sold as secondary raw material or used as energy resources, such as hydrogen and methane.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

Vaiano

Iervolino

Sarno

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-In this work, the simultaneous production of CH 4 and H 2 from photocatalytic reforming of glucose aqueous solution on Pd-TiO 2 catalysts under UV light irradiation by Light-Emitting Diodes (LED) was investigated. The Pd-TiO 2 catalysts were prepared by the photodeposition method. The Pd content was in the range 0.5-2 wt% and a photodeposition time in the range 15-120 min was used. Pd-TiO 2 powders were extensively characterized by X-Ray Diffraction (XRD), S BET , X-Ray Fluorescence spectrometry (XRF), UV-Vis Diffuse Reflectance Spectra (UV-Vis DRS), TEM and X-Ray Photoelectron Spectroscopy (XPS). It was found that the lower Pd loading (0.5 wt%) and 120 min of photodeposition time allowed us to obtain homogeneously distributed metal nanoparticles of small size; it was also observed that the increase in the metal loading and deposition time led to increasing the Pd 0 species effectively deposited on the sulfated TiO 2 surface. Particle size and the oxidation state of the palladium were the main factors influencing the photocatalytic activity and selectivity. The presence of palladium on the sulfated titania surface enhanced the H 2 and CH 4 production. In fact, on the catalyst with 0.5 wt% Pd loading and 120 min of photodeposition time, H 2 production of about 26 lmol was obtained after 3 h of irradiation time, higher than that obtained with titania without Pd (about 8.5 lmol). The same result was obtained for the methane production. The initial pH of the solution strongly affected the selectivity of the system. In more acidic conditions, the production of H 2 was enhanced, while the CH 4 formation was higher under alkaline conditions.Résumé -Production simultanée de CH 4 et H 2 par réformage photocatalytique d'une solution aqueuse de glucose sur un catalyseur Pd-TiO 2 sulfaté -Dans cette recherche, la production simultanée de CH 4 et H 2 par le reformage photocatalytique de glucose sur les catalyseurs Pd-TiO 2 sous irradiation de lumière UV réalisée par des diodes électroluminescentes (LED) a été étudiée. Les échantillons de Pd-TiO 2 ont été préparés par la méthode de photodéposition. Le contenu de Pd était compris entre 0,5-2 % en poids et il a été utilisé un temps de photodéposition dans la gamme 15-20 minutes. Les poudres Pd-TiO 2 ont été caractérisées par diffraction des rayons X (XRD), surface spécifique BET (S BET ), fluorescence X (XRF), spectrométrie UV visible (UV vis DRS), microscopieThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 5, pp. 891-902 Ó V. Vaiano et al., published by IFP Energies nouvelles, 2015 DOI: 10.2516 électronique à transmission (TEM) et spectrométrie photo électronique X (XPS). Il a été constaté que le chargement inférieur de Pd (0,5 % en poids) et 120 minutes de temps d...

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N‐doped TiO₂/s‐PS aerogels for photocatalytic degradation of organic dyes in wastewater under visible light irradiation

Cited by 93 publications

References 40 publications

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

Photocatalytic properties of TiO2-functionalized tiles: influence of ceramic substrate

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts

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N‐doped TiO2/s‐PS aerogels for photocatalytic degradation of organic dyes in wastewater under visible light irradiation

Cited by 93 publications

References 40 publications

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

Polystyrene CuO/Cu 2 O uniform films inducing MB-degradation under sunlight

Photocatalytic properties of TiO2-functionalized tiles: influence of ceramic substrate

Simultaneous Production of CH4and H2from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO2Catalysts

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Product

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N‐doped TiO₂/s‐PS aerogels for photocatalytic degradation of organic dyes in wastewater under visible light irradiation

Simultaneous Production of CH₄and H₂from Photocatalytic Reforming of Glucose Aqueous Solution on Sulfated Pd-TiO₂Catalysts