Armendáriz-Mireles Eddie Nahúm

Universidad Politécnica de Victoria · Ingenieria de Manufactura de Materiales Avanzados

Dye-Sensitized Solar Cells (DSSC) and optical fiber based-sensors sensitized with organic dyes play a fundamental role in modern technology, particularly in the family of photovoltaic power generation devices and measurement of chemical variables. DSSC is low-cost, highly efficient, and easy to manufacture. Therefore, they are a suitable option for...

Herein are reported the main pros and cons of using the conversational Artificial Intelligence (AI) called “ChatGPT” as a tool to write essays in the academic and scientific community. Also, selected mathematical and scientific problems were solved to determine the effectiveness of this platform. To this end, a systematic case study was designed an...

Parameters optimization of emerging electrochemical processes is crucial for improving efficiency and cost. Herein, a procedure based on the genetic algorithms (GA) search method was proposed to solve the fundamental Cottrell equation. First, a basic GA background is provided to help students and researchers understand the basic concepts of such ev...

Electric mobile vehicles are promising technologies intended to accelerate the clean energy transition. In this regard, the battery management system will be critical in deploying this revolution since it might help with cost reduction, life cycling, and battery improvements. Herein, the authors investigated the use of Industry 4.0 (I4.0) technolog...

Material structure is a crucial part of the design of any product where the intention is to dissipate loads and lighten material. Because some structures today are increasingly complex in geometry and internal structure, it becomes impossible to opt for traditional methods to manufacture them. In this sense, additive manufacturing enables the creat...

In this paper, the potential of marine algae to act as sensitizers is systematically studied and presented. We aim to find a feasible financial strategy to enhance the global efficiency of dye-sensitized solar cells (DSSC). Algae are mainly composed of chlorophylls, carotenoids, flavonoids, and Betalains, essential pigments that confer unique chara...

Due to the importance of cutting-edge nanomaterials applications in energy generation and storage devices, electrochemical impedance spectroscopy (EIS) has been adopted to fully understand the electronic and chemical reactions occurring inside these emerging technologies. Electronic behavior can be correlated with electrochemical properties such as...

Several natural materials have demonstrated excellent mechanical performance by using abundant resources and friendly chemistry. Additionally, these materials have evolved to optimize weight and maximize strength and energy absorption at the macro, micro, and nanostructural level. Likewise, engineers still face challenges regarding the same issues....

Through powder techniques and in situ solid state reactions, a refractory cement CaAl2O4-based was fabricated, using CaCO3 extracted from chicken eggshells and Al as precursor materials. To reduce the particle size and achieve a homogeneous mixture, the powders were subjected to high-energy milling in a planetary mill. The powders resulting from th...

This work is centered on the study of the internal electrochemical variables of a dye sensitized solar cell (DSSC), using characterization techniques such as: electrochemical impedance spectroscopy (EIS) and numerical modeling of the process, in order to obtain a deeper knowledge of the internal behavior of the solar cell. In this way, it was possi...

Las aleaciones de alta entropía son una nueva clase de aleaciones multicomponentes, que consisten en cinco o más elementos metálicos con proporciones equiatómicas. A pesar del gran número de elementos de aleación, las HEA pueden exhibir fases de solución sólida simples, como las fases cúbicas centrada en las caras y centrada en el cuerpo. En este t...

Although industry 4.0 has gained increased attention in the industry, academic, and governmental fields, there is a lack of information about the relationship between this digital transformation and sustainable development. This work explores the concept of sustainability applied in industry 4.0 and the main advantages that this revolution incorpor...

Human beings are attempting to take advantage of renewable natural resources by using solar cells. These devices take the sun’s radiation and convert it into electrical energy. The issue with traditional silicon-based solar cells is their manufacturing costs and environmental problems. For this reason, alternatives have been developed within the so...

Aluminum matrix composites have recently taken an important role in advanced applications because they have a good combination of physical and chemical properties. For this reason, in this work, aluminum composites, with additions of ceramic particles (mullite or tungsten carbide), were manufactured in order to determine the effect of those particl...

La complejidad es inherente a cualquier proceso. Por ello, las consecuencias de malas administraciones empíricas son un aumento de los riesgos, la incertidumbre y los costos innecesarios. Sin embargo, existen diferentes herramientas destinadas a medir y reducir la complejidad de los sistemas productivos. El valor de Six Sigma se deriva de la estand...

This work is focused on the design and development of carbon-supported NiSn alloys by using the intermittent microwave heating polyol process. The electrocatalysts were synthesized under different sequences of irradiation time and Ni:Sn ratios. X-ray diffraction (XRD) measurements showed that NiSn/C electrocatalysts have a displacement to lower 2θ...

The wetting process of a ceramic substrate (Al2O3) with and without carbon coating by means of aluminum-based alloys has been investigated. A mathematical simulation that predicts wettability in the systems under study is proposed, taking into account the diffusional effects of the used constituents. The prediction of the mathematical simulation is...

A green methanol functionalization of Vulcan XC-72 as novel strategy to develop high-performance Pt1Sn1 electrocatalyst was studied. The electrocatalysts were synthesized by the intermittent microwave heating (IMH) polyol method. X-ray diffraction measurements revealed that Pt1Sn1/C-MetOH (i.e., dispersed on functionalized Vulcan) has a higher degr...

Quality assurance in manufacturing engineering requires precise methods in order to implement quantitative techniques for processes control. Optical methods have proved to be suitable in manufacturing since they present several advantages over traditional approaches such as non-destructive, non-contact, and high speed, among others. For example, la...

At today great interest has been paid to hydrogen production by water electrolysis due to their simplicity and low cost. Dye sensitized solar cell are promising devices as renewable electrical power source to achieve water electrolysis because they possess high theoretical efficiency compared with Si based solar cells. In this research, ZnO photo c...

Particulate composite was prepared from a mixture of cement, gravel and water with additions of a polyepoxide and/or expanded polystyrene in powder. For consolidation, each mixture was poured into a mold, remaining for a short period and then removed. For complete solidification the specimens were cured with water during the final stage. The weight...

A SrTiO3 electroceramic with perovskite structure was produced by the calcination of a mixture of SrCO3 and TiO2 intensively grounded by high energy milling. For this purpose, raw materials were mixed in stoichiometric amounts in a planetary type mill; the obtained powder mixture was calcined for 2 h at temperatures between 800 and 1300°C. Samples...

En primer lugar, se han añadido técnicas alternas al diseño mismo como: Técnicas aplicadas al uso de mallas o superficies, técnicas de flexión y estiramiento de sólidos, el propósito de generar un punto de torsión o aplicar una curvatura, por lo que también, en el manejo de técnicas de multa cuerpos de sólidos a superficies y de superficies a sólid...

In this work activation of ZnO powders was achieved by using high energy ball milling combined with reaction bonded process. Herein, highly active ZnO photocatalyst was synthesized by mixing zinc oxide powder (ZnOraw) with the metallic Zn powder in a planetary-type mill. Results of X-ray diffraction of the synthesized ZnO, shown reflections peaks a...

Effect of additions of metal submicron particles on properties of alumina matrix composites - Volume 34 Issue 17 - Enrique Rocha-Rangel, Juan López-Hernández, Carlos A. Calles-Arriaga, Wilian J. Pech-Rodríguez, Eddie N. Armendáriz-Mireles, José A. Castillo-Robles, José A. Rodríguez-García

In the present work, photoanodes for dye-sensitised solar cell (DSSC) composed of SnO2 nanoparticles were developed by electrophoretic deposition (EPD) process . Taguchi experimental design was adopted to investigate the effect of EPD parameters into the physical and chemical properties of the deposited film. The deposited photoanodes were characte...

The present research is focused on synthesizing and physically characterization different mixtures of concrete mortar reinforced with thermostable polymers from industrial waste. The mortars were made from the homogeneous mixture of cement, gravel, and water with additions of polyepoxide in different percentages. This polymer carried a milling proc...

This study deals with the analysis of the internal electrochemical characteristics of dye-sensitized solar cells (DSSC) using as semiconductor titanium dioxide (TiO 2 ). The built DSSC was characterized by electrochemical impedance spectroscopy. This allowed to identify the mechanisms of degradation and extrapolation in function of efficiency impro...

El uso de la bicicleta implica un gran riesgo de sufrir lesiones por caídas, dentro de las cuales las de mayor riesgo son las lesiones en la cabeza, por lo cual es indispensable el uso de equipo de protección. El presente proyecto se enfoca en el análisis de la protección ejercida por un casco de ciclista realizado a través del método de elemento f...

En la presente obra se muestra el efecto de varias variables involucradas en el procesamiento del compósito, como lo fueron en primer lugar, la cantidad de material de refuerzo (titanio) agregado a la matriz (alúmina). Posteriormente, se hizo un estudio comparativo entre llevar a cabo la mezcla y molienda de los polvos a través de molienda de baja...

In this work, strontium titanate samples were prepared starting from SrCO3 and TiO2 powders mixture. Raw materials were activated mechanically in a planetary mill and then calcined at different temperatures (900 to 1300oC). Powders after grinding were analyzed by differential thermal analysis in order to follow the carbonate decomposition. On the o...

The development of photovoltaic panels has improved the conversion of solar radiation into electrical energy. This paper deals with the electrical and thermal characteristics (voltage, current and temperature) of photovoltaic solar cells sensitized with natural pigments (Dye-Sensitized Solar Cell or DSSC) based on a titanium dioxide semiconductor....

La Biomimética ha existido, se han logrado una gran cantidad de desarrollos alrededor del mundo y en muchos campos de la ciencia y la tecnología aplicando sus conceptos. Cada vez son más las instituciones que han creado departamentos en los cuales se desarrollan modelos bioinspirados para la solución de ciertos problemas. Sin embargo, aún existe un...