845 research outputs found
Saulle. Excerpts - Don Mus.Ms. 11 : S, orch
No full textGaetano AndreozziText: Francesco Saverio Salfi. - Quelle: manuscript, manuscript. - Provenienz: Fürstlich Fürstenbergische Hofbibliothek, DonaueschingenSaulle= Teatro del R: Fondo | Vi punirò Lo giuro | Aria | Del Sig:re D. Gaetano Andreozzi | 1794 | f:
Nanostructured catalysts production through electrochemical methods: synthesis, characterization and possible applications
No full textIn this work a study of the electrochemical synthesis of TiO2 based nanostructured electrodes for photocatalytic and electrocatalytic applications is presented.
The study on the electrochemical synthesis of TiO2 nanotubes (NTs) through anodization has been aimed to develop a novel “single-step” anodization method in symmetric electrochemical cells (i.e. both electrodes are Ti sheets), instead of traditional “double-step” processes, which include the sequence of two anodizations separated by the dissolution of the first formed TiO2 and are carried out in asymmetric cells with Pt electrocatalysts as counter electrodes.
Besides the anodization, in relation to the specific applications discussed in this study, further electrochemical synthesis routes, employing the anodized TiO2 electrodes, were investigated.
In photocatalytic applications, the electrodeposition of Cu2O nanoparticles over the surface of TiO2 NTs has been adopted as strategy to overcome the limited light absorption of the bare TiO2 photocatalyst (active only under UV irradiation). Here, in agreement with most of the studies among the available literature, under visible irradiation the TiO2/Cu2O based electrodes showed improved performances than the bare TiO2 (inactive under only visible light). These improved performances have been frequently claimed based on the only analysis of the photocatalytic performances under visible light, while in the present study it was found that, when the light source employed was UV + visible rather than only visible, the photo-catalytic performances of the composite electrodes were lower as compared to the bare TiO2 electrode. Furthermore, the bare TiO2 activity registered under UV + visible was higher than the composite electrode activity registered under only visible irradiation. To overcome this unexpected behaviour, at this stage the study has been aimed to the development of photo/electrochemical post-treatments, which allowed to improve the performances of the Cu2O based electrodes also under UV + visible light.
Black TiO2 electrocatalysts were finally synthesized in the framework of the activities related to the e.THROUGH EU project (H2020-MSCA-RISE-2017-778045), which is aimed to the recovery of critical raw materials and sustainable remediation.
Briefly, this goal would be achieved through the development of electrokinetic technologies for soil remediation, as in the case of the electrodialytic mine tailings remediation performed in this work. Electrodialytic remediation is generally carried out in symmetric cells which employ commercial Ti/MMO (Mixed Metal Oxides; Ir/Ru-based) electrodes, for both anode and cathode. Main limit for the real employment of these technologies are the energy costs related to the stirring and the power supply. Here, considering that the main reactions involved during the process are the water splitting reactions, one of the strategies to minimize the overall process cost is based on the recovery of the produced hydrogen. Considering that Ir-/Ru- based compounds are benchmark catalysts for the anodic reaction involved rather than the cathodic hydrogen evolution reaction, at this stage, the study has been aimed to the development of a non-commercial hydrogen evolution reaction (HER) electrocatalyst, namely the Black TiO2 based electrodes. These electrodes have been synthesized through the electrochemical reduction of the Ti/TiO2 electrodes resulting from the anodization, employing Ti sheets as counter electrodes
Oxidation of benzothiazole,2-mercaptobenzothiazole and 2-hydroxybenzothiazole in aqueous solution by means of H2O2/UV or photoassisted Fenton systems
No full textA kinetic model for the degradation of benzothiazole by Fe3+-photo-assisted Fenton process in a completely mixed batch reactor
No full textImmaginare il porto/immaginare Trieste. Strategie portuali, geografie dei traffici e saturazione del territorio e dello spazio ecologico
No full textThe paper proposes an analysis of some traditional ideas of the historical research about the port of Trieste, as for instance the role of Habsburg monarchy in the development of the port and of the town, and the turning-point of First World War. The importance of examining such concepts its great, because they are still used in the elaboration of development strategies for the city.Si propone una analisi di alcuni concetti tradizionali della ricerca storica sul porto di Trieste, come il ruolo della monarchia absburgica nello sviluppo del porto e della città e la svolta rappresentata dalla Prima guerra mondiale. È importante esaminare tali concetti, poiché essi sono tuttora impiegati nell’elaborazione di strategie di sviluppo della città
ANIMA, FOLLIA, INTERSOGGETTIVITA: ALCUNE RIFLESSIONI SULL'ANTROPOLOGIA HEGELIANA
No full textThe article aims at analyzing the first part of the Subjective Spirit, namely the
Anthropology, trying to discover the first step of the Spirit in the concept of soul, due to
its intrinsic intersubjectivity. The first paragraph describes Hegel’s concept of soul, which is
characterized by immediacy and indeterminateness. These characters belong to the human
being as a spiritual being. The second paragraph concerns the concept of sensibility, which
is connected to the Nature-Spirit gap. Sensibility is the first form of conceptualization of
alterity. Through sensibility, soul begins to develop itself as subjectivity. This development
is marked by negativity and contradiction. The highest contradiction is discussed in the
third paragraph: insanity as an important moment for the spiritual development. In the
fourth paragraph the author demonstrates that through insanity soul partially recognizes
the immanent and intersubjective relation that constitutes itself
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