Electrical impedance spectroscopy is used to study the electrical properties of cells in suspension.
Autor(es): Angel Manuel Melendez.
Una combinación de tratamientos mecánicos y químicos realizados a desechos de vidrio laminado permitió la separación completa de sus componentes, el vidrio templado y el butiral de polivinilo (PVB), lo cual hizo viable su recuperación y reciclaje para generar productos con valo...
Autor(es): Angel Manuel Melendez.
We studied how the synergistic behavior between structural defects and ligand field electronic states helps to establish adequate heterostructures to be useful in QDSSCs.
Autor(es): Angel Manuel Melendez.
We discuss how an excess of cadmium causes structural disorder and defect levels impacting the photoconversion efficiency of QDSSC devices.
Autor(es): Angel Manuel Melendez.
This work proposes a method for the evaluation of the effect of galvanic interactions between intergrown sulfide mineral grains present in a thiosulfate leaching system, based on a combination of electrochemical measurements.
Autor(es): Angel Manuel Melendez.
To accurately determine the conditions in which deleterious photoinduced phase segregation appears in mixed halide perovskite films, we have tracked the NP-to-bulk transition induced by annealing.
Autor(es): Angel Manuel Melendez.
Grain-boundary nanosegregation of alpha–FeOOH and alpha-Fe2O3 in TiO2 films cause deleterious effect on photocatalytic and photoelectrocatalytic activity. Electron scattering at grain boundaries contributes to increasing the resistivit...
Autor(es): Angel Manuel Melendez.
The photoelectrochemical performance and the semiconducting properties of iron, carbon, and nitrogen modified TiO2 films prepared by a sol–gel method and deposited on 304 stainless steel plates by a dip–coating technique were studied.
Autor(es): Angel Manuel Melendez.
We investigate the energy transfer mechanism and the charge carrier transport capacity of a set of photoanodes developed for a CdSe quantum dot-sensitized solar cell.
Autor(es): Angel Manuel Melendez.
Hg1-xCdxSe films were prepared in an aqueous solution by using potentiostatic deposition. We have focused on the improvement of the composition of the film to obtain single-phase of chalcogenide.
Autor(es): Angel Manuel Melendez.
We report the application of voltammetry of microparticles methodology to investigate the reactivity of sliding wear debris from low alloy (AISI 4140) and tool (AISI H13) steels.
Autor(es): Angel Manuel Melendez.
A methodology was developed to evaluate the capacity of heavy metal ions adsorption on particulate samples using carbon paste electrodes.
Autor(es): Angel Manuel Melendez.
An evaluation of the premature wear of a cutting tool using physical characterization together with an electrochemical analysis was carried out.
Autor(es): Angel Manuel Melendez.
Calcium phosphates were obtained by reducing nitrate ions to produce hydroxide ions on TiO2/stainless steel and TiO2/titanium electrodes. A catalytic current associated with nitrate reduction reaction was obtained for stainless steel electrode, lea...
Autor(es): Angel Manuel Melendez.
To obtain optimum simultaneous extraction of Pt, Pd, and Rh from catalytic converters of spent exhaust systems, a series of leaching tests were carried out to investigate the key variables in evaluating leaching behavior by response surface methodology.
Autor(es): Angel Manuel Melendez.
Kinetics for extraction of platinum from spent autocatalysts, using nitric acid as an oxidant in hydrochloric acid solution, was investigated. The kinetic data were analyzed using the shrinking core model.
Autor(es): Angel Manuel Melendez.
To fabricate solar cells, ordered TiO2 nanotube (TNT) arrays were prepared by double anodization. TNT arrays with variable lengths were obtained by changing the duration of the anodizing process.
Autor(es): Angel Manuel Melendez.
Different metal surface treatments were performed on meshes of stainless steel 304 and titanium to investigate the effect of photocatalytic activity in supported TiO2 films.
Autor(es): Angel Manuel Melendez.
A tetrapolar probe to measure the electrical properties of electrolyte solutions was implemented with gold electrodes and a potentiostat according to the van der Pauw method.
Autor(es): Angel Manuel Melendez.
An electrodeposition process from an aqueous bath of CdSO4, SeO2, and Hg2Cl2 at pH 2.3 was performed to synthesize two Hg1-xCdxSe alloys with x = 0.8 onto TiO2 surface.
Autor(es): Angel Manuel Melendez.
The effect of reduced graphene oxide content in boron?modified TiO2 nanocrystalline films on their photocatalytic activity in phenol oxidation is investigated.
Autor(es): Angel Manuel Melendez.
-Core/shell nanoparticles with high photocatalytic activity were obtained by sol–gel. -Electrochemical techniques were used to uncover the ZnO and TiO2 interaction.
Autor(es): Angel Manuel Melendez.
The structural and photoelectrochemical properties of Bi–Nb–M–O (M = Al, Fe, Ga, In) mixed oxide semiconductor films were studied in order to explore their use as photoanodes.
Autor(es): Angel Manuel Melendez.
The chemical dissolution reaction mechanism without electron transfer of natural orpiment grains in a 1 M NaOH solution is investigated using a combination of spectroscopic, chromatographic, and electrochemical techniques.
Autor(es): Angel Manuel Melendez.
The pyrargyrite and proustite oxidation with electrogenerated formamidine disulfide is studied by voltammetry of microparticles. The chemical bond between sulfur and pnictogen (As or Sb) has an important role in the dissolution process.
Autor(es): Angel Manuel Melendez.
An electrochemical method is proposed to determine sulfide minerals and anglesite in zinc flotation concentrates. Sphalerite is electrochemically silent in the potential range studied.
Autor(es): Angel Manuel Melendez.
The electrochemical reactivity of the sulfosalts pyrargyrite and proustite in a cyanide medium was studied with two types of electrodes.
Autor(es): Angel Manuel Melendez.
Solid action: A study of physical properties in correlation with the chemistry and structure of the Ag3AsS3–Ag3SbS3 series is obtained by a combination of spectroscopic and electrochemical measurements to investigate thei...
Autor(es): Angel Manuel Melendez.
The proposed methodology is based on the preliminary oxidation of silver-bearing minerals samples. The reduction behavior of previously oxidized minerals is associated with cyanide leachable silver.
Autor(es): Angel Manuel Melendez.
The diffusion phenomena in Linde Type A zeolites were measured by combining electrical (open–circuit potential) measurements and cyclic voltammetry in carbon paste electrodes. The influence of nature and cation content on the ion exchange rate was investigated.
Autor(es): Angel Manuel Melendez.
The galvanic effect between the main associated mineral phases in a zinc concentrate was evaluated using an electrochemical methodology based on composite electrodes. Comparative studies were performed between high-purity galena and sphalerite specimens. ...
Autor(es): Angel Manuel Melendez.
The effect of ClO4–, NO3–, and SO42– on the kinetics, growth type, and morphology of copper electrodeposition is investigated. The anion type has a direct effect on the electron transfer reaction and the electroc...
Autor(es): Angel Manuel Melendez.