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Publications (22)
In the present work, we study the photocatalytic activity of carbon-modified TiO2 (C-TiO2)/polymer composite coatings obtained by low pressure cold gas spraying (LP-CGS). To produce the novel coatings, C-TiO2 was mixed with a ductile material, the polymer ECTFE, by means of a low energy ball milling (LEBM) process. The LEBM system permits the mecha...
In this work, the effectiveness of UV and UV/H2O2 to degrade twenty-three pharmaceutical compounds present in microfiltered secondary effluent of an urban wastewater treatment plant was investigated. Apparent kinetic constant and UV doses required for effective removal of the studied compounds were calculated using a custom-made photochemical react...
The effects of silver and palladium metals on the photocatalytic degradation of diclofenac sodium salt (DCF), isoproturon (IP) and phenol (PHL) in water over lab-made TiO2 synthesized following a sol–gel method were investigated. Silver and palladium catalysts were prepared by photodeposition at 1 wt.% of loading metal. The resulting materials were...
Photocatalytic abatement of NOx by C-TiO2/Polymer composite coatings obtained by Low Pressure Cold Gas Spraying”
M.Robotti, S.Dosta, C.Fernandez-Rodriguez, M.J.Hernandez- Rodriguez, I.G.Cano,E.Pulido Milan, J. M. Guilemany
30th International Conference on Surface Modification Technologies (SMT30). Proceedings. WHOIS database: 2016-07-17T00:00:51Z....
The structural-microstructural characteristics and interfacial charge transfer are key issues to the development of efficient mixed phase TiO2 photocatalysts. In this work, the interplay of lattice deformation and microstrains as well as the identification of charge trapping sites and electron transfer were investigated for a series of nanostructur...
TiO2 coatings of highly photoactive lab-made titania were prepared on the outer wall of the inner tube of a glass tubular reactor by dip-coating method. The effect of decreasing the size of the aggregates to improve adhesion and photoactivity of the coatings to degrade phenol, diclofenac and isoproturon was also investigated. Chemical disaggregatio...
Heterogeneous photocatalysis using nanostructured titanium dioxide (TiO2) supported on borosilicate tubes and alumina blocks has been studied for the elimination of emerging contaminants from wastewater effluents. Adherence and aging of the catalyst were studied as well as the influence of the matrix in the photocatalytic kinetics. Operational para...
In this work we studied the elimination, mineralization and detoxification of wastewaters from banana postharvest industries, contaminated with the fungicide imazalil, by means of heterogeneous advanced oxidation processes. We compared the activity of the commercial photocatalyst Evonik P25 and the lab-made EST-1023t in the degradation of imazalil...
This article describes a photocatalytic nanostructured anatase coating deposited by cold gas spray (CGS) supported on titanium sub-oxide (TiO2−x
) coatings obtained by atmospheric plasma spray (APS) onto stainless steel cylinders. The photocatalytic coating was homogeneous and preserved the composition and nanostructure of the starting powder. The...
The elimination and mineralization of the fungicide imazalil and its by-products has been studied by means of heterogeneous photocatalysis. The activity of different photocatalysts, including the commercial TiO2 benchmark photocatalyst (Evonik P25) and several TiO2-based lab-made catalysts, is compared. The best results were achieved with the new l...
TiO2 particles were prepared by sol-gel method alone and by sol-gel method combined with hydrothermal treatment. The structural and photocatalytic properties of the two series of photocatalysts were compared. XRD studies revealed that rutilization was faster in the series of photocatalysts, which had been additionally subjected to a hydrothermal pr...
In this work we compared the photocatalytic activity of sol–gel synthesized nanocrystalline TiO2 material (ECT-1023t) and a commercial TiO2 (Degussa P25) in the elimination, mineralization and detoxification of waters contaminated by the herbicide bentazon and its toxic intermediates under UV light. Adsorption and kinetics studies were undertaken a...
A comparative study of the photoefficiency of two different TiO2 catalysts in the elimination, mineralization and detoxification of waters containing herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) and toxic intermediates was performed at laboratory scale. Commercial TiO2 (Degussa (Evonik) P25) and TiO2 synthesized by citrate sol–gel method (ECT-1...
The relative activity of TiO2 photocatalysts depends to a large extent on the type of test substrate. With this in mind, phenol, formic acid, 2,4-dichlorophenoxyacetic acid (2,4-D) and methyl orange (MO) were selected as test substrates due to their different degradation mechanisms. In this work, the aim behind the synthesis and subsequent surface...
In the present work the efficiency of a new TiO2 catalyst (ECT), synthesized by means of an optimized sol–gel method, is studied for degradation of an important pharmaceutical water pollutant, diphenhydramine (DP). Its activity is compared to P25, the benchmark catalyst, produced by Evonik Degussa Corporation, under different catalyst loadings (up...
A comparative study of the photocatalytic activity of two different TiO2 catalysts in solar photocatalytic oxidation, mineralization and detoxification of waters containing herbicides 2,4-dichlorophenoxyacetic acid (2,4-D), bentazon and toxic intermediates was performed in a pilot plant scale photoreactor. Commercial TiO2 (Degussa P25) and TiO2 syn...
The elimination and detoxification of water contaminated with the principal commercial fungicides—thia-bendazole (Textar 60 T) and imazalil sulphate (Fruitgard IS 7.5)—used in the postharvest treatment of ba-nanas was successfully achieved through the use of advanced oxidation processes (AOPs). The techniques tested were heterogeneous photocatalysi...
New TiO2 catalysts have been synthesised by means of a sol–gel method in which aggregates have been selected before thermal treatment. Sieving and calcination temperature have been proved to be key factors in obtaining catalysts with greater photoactivity than that of Degussa P-25. These new catalysts have been characterized by means of transmissio...
We studied the distribution, abundance and size structure of three limpet species (Patella rustica, Patella candei crenata and Patella aspera) throughout the rocky intertidal zone of the Canary Archipelago. We used a stratified and hierarchical sampling strategy that involved the study of three intertidal zones (high, intermediate and low intertida...
