D.J. Araujo Pérez

Universidad Veracruzana | UV · Facultad de Ciencias Químicas

This work uses a simple one-step hydrothermal method to synthesize reinforced TiO2 nanomaterials with functionalized carbon nanotubes (F-CNTs) and PEDOT: PSS. Pure anatase TiO2 was obtained at 180 °C while TiO2 reinforced with F-CNTs helped to obtain anatase at 140 °C. Particularly, TiO2 reinforced with PEDOT: PSS yields ordered anatase at temperat...

With the use of the sputtering technique, carbon incorporation was carried out on TiO2 anodized with HCl. FE-SEM study revealed the formation of tubes and/or fibers nanostructures on the surface of the acquired samples. It was possible to identify the presence of carbon by vibrational modes and EDS analysis. The nanoindentation test demonstrated ho...

Electrochemical anodizing is one of the processes that due to its practicality, versatility, and excellent results has been used for decades for the oxidation of any metallic surface and the formation of nanostructures. In the present work was anodized commercially pure titanium using a solution based on hydrochloric acid, ethylene glycol, and deio...

In this work, the anodization of grade 2 titanium was performed using a HCl-based electrolyte in order to obtain Titania nanostructures. Different glycerol concentrations were added to the HCl electrolyte to study the effect it has on the shape and density of the nanostructures, additionally, anodization time and voltage was also varied. The anodiz...

Titanium-Silicon Oxynitride (TiSiNO) coatings were synthetized by reactive co-sputtering technique on stainless steel 304 substrates varying the substrate temperature during the deposition. Two targets were used simultaneously, the first one of Ti on a DC source at 100 W and the second was a Ti-Si-O target on a pulsing RF source at 180 W. X-ray dif...

Nanostructured TiO 2 and TiO 2 /W thin films were deposited on Corning glass substrates by RF and DC mag-netron co-sputtering at room temperature, using three targets of TiO, Ti and W. After deposition, samples were subjected to an annealing treatment in air at 500 °C for 3 hrs. The effect of the annealing treatment and tungsten addition to the TiO...

Variation of the reaction time at 30, 60, 90 and 120 min, respectively, on the chlorination of Ti(C 5 H 5 )Cl 2 , at 900°C, has delivered carbon materials with a tuneable mixture of mesopores and micropores, surface areas as high as 855 m2g ⁻¹ and pore volume of 0.56 cm ³ g ⁻¹ . The cyclic voltammetry measurements yielded capacitances as high as 19...

En el presente trabajo, se sintetizaron películas delgadas de TiO2 dopadas con Tungsteno mediante la técnica de Magnetrón Sputtering DC, RF1 y RF2 sobre sustratos de Silicio con orientación cristalina a lo largo del plano (100). Los blancos utilizados fueron de: Ti (pureza de 99.995% en la fuente de DC a 120W), TiO (pureza de 99.99% en fuente RF1 a...

In the present investigation, nanostructured ceramic HfN coatings were deposited onto silicon (100) wafer by magnetron sputtering DC method, from a metallic Hf target. The deposition process followed by a similar pattern as the multilayer film deposition, using cycles with the nitrogen gas turned on for 90 s and turned off for 15 s; four sets of sa...

Carbon materials have been obtained by the chlorination reaction of Ti(C5H5)Cl2 at 900 °C, varying the reaction time at 30, 60, 90 and 120 min. The average microstructure, studied by X ray powder diffraction, suggest that these materials consist mainly of disordered carbon with low graphitization degree (from 13.5 to 16.5%). These results are in ag...