Visentin Francesca

• Ph.D. Resercher at Institute of Condensed Matter Chemistry and Technologies for Energy, Italian National Research Council

Among semiconductor metal oxides, that are an important class of sensing materials, titanium dioxide (TiO2) thin films are widely employed as sensors because of their high chemical and mechanical stability in harsh environments, non-toxicity, eco-compatibility, and photocatalytic properties. TiO2-based chemical oxygen demand (COD) sensors exploit t...

A titania (TiO2) - hydroxyapatite (HA) bi-layered material, with a target surface design, was obtained by means of a two-step process on the surface of Ti substrates with three different pristine morphologies and topographies. A dense, compact and crystalline titania inter-layer was obtained via Metal Organic Chemical Vapor Deposition, and a homoge...

Three differently treated titanium substrates to be used in dental implant applications and with different surficial morphology were coated with titanium dioxide (TiO2) films by using Low-Pressure Metal Organic Chemical Vapor Deposition (MOCVD). No literature references were found on the performance evaluation of the TiO2 MOCVD coatings on substrat...

The aim of the paper is to assess the photocatalytic performance of self-cleaning paints – available in the market – designed for applications in indoor environment. Three self-cleaning photocatalytic paints were deeply characterised by means of complementary analytical techniques (X-Ray Diffraction, Thermogravimetry, Fourier Transform Infrared Spe...

In the present paper, sulphur-modified titanium dioxide (S-TiO2) is prepared as nanopowder in mixed rutile-anatase phase by an unprecedented simple, reproducible and cheap synthetic procedure, directly employing elemental sulphur powder as sulphur source. TiO2 and several reference TiO2 samples obtained in pure rutile or anatase phase were also pre...

Macroporous inorganic structures with high surface-to-volume ratio have been recognized as a centre of interest in many fields. Here, attention is focused on a hybrid synergic methodology to prepare honey-comb (HC) anatase TiO2 films with increased specific surface area. The breath figures (BFs) method is exploited to produce HC polystyrene (PS) te...

High surface-to-volume ratio Co3O4/TiO2 heterojunctions were fabricated by combining different methods. Atomic layer deposition (ALD) and a photochemical method were used to coat polystyrene (PS) 3D-Direct Opal (3D-DO) structures on conductive ITO substrates. Firstly, 3D-DO of PS were crystallized on ITO substrates to form the high surface-to-volum...

Chemically modified natural fibers were introduced into a commercial biodegradable poly(butylene adipate-co-terephthalate) (PBAT) matrix to obtain composite materials in a mini-extruder. Influence of the fiber introduction on thermal and mechanical properties of the composites were studied. A decrease of the crystallinity degree of the composites w...

The radiofrequency magnetron sputtering codeposition is a versatile technique to obtain Er-doped glass films, i.e., optical materials characterized by the emission of an intense photoluminescence signal at lambda = 1.54 mu m, the most exploited wavelength for optical telecommunications through fiberglass. After the optimization of this radiative em...

The present work was devoted to the X-ray photoelectron spectroscopy (XPS) investigation of the principal core levels of a Fe2O3-TiO2 system. The sample was synthesized on a glass substrate at 430 °C in N2/O2 atmospheres by low-pressure metal organic chemical vapor deposition (MOCVD) co-evaporating the precursors titanium(IV)isopropoxide [Ti(OiPr)4...

The coupling of zinc oxide tetrapods (t-ZnO) with anatase TiO2 in the form of CVD coatings on ZnO nanotetrapods was investigated. t-ZnO/TiO2 core-shell structures, consisting of uniformly and completely TiO2 covered ZnO nanotetrapods, were characterized by scanning electron microscopy, X-ray diffraction and UV-Vis spectra. Photocatalytic activity,...

The present work was devoted to the X-ray photoelectron spectroscopy (XPS) investigation of the principal core levels of a Fe 2 O 3 -TiO 2 system. The sample was synthesized on a glass substrate at 430 C in N 2 /O 2 atmospheres by low-pressure metal organic chemical vapor deposition (MOCVD) co-evaporating the precursors titanium(IV)isopropoxide [Ti...

A novel titanium dioxide architecture, called titanium dioxide nanopetals, was obtained through two sequential vapour techniques, metal-organic chemical vapour deposition (MOCVD) and magnetron sputtering on a single wall carbon nanohorn (SWCNH) bed, resulting in a surprising synergistic effect. The new composite material was characterized by scanni...

The preliminary results concerning the preparation of a new hybrid nanocomposite material are here presented. The process was achieved by various steps starting from the deposition of anatase TiO2 on a powder of single wall carbon nanohorns (SWCNHs) via MOCVD by using titanium tetraisopropoxide Ti(OiPr)4 as the precursor, then the dispersion and so...