http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/154 2026-04-08T21:21:14Z 2026-04-08T21:21:14Z Mejia Estrella, Ixchel Alejandra Pérez Larios, Alejandro Sulbarán Rangel, Belkis Guzmán González, Carlos Alberto http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1487 2023-02-17T19:16:22Z 2022-10-01T00:00:00Z

Title: Reaching Visible Light Photocatalysts with Pt Nanoparticles Supported in TiO2-CeO2 Authors: Mejia Estrella, Ixchel Alejandra; Pérez Larios, Alejandro; Sulbarán Rangel, Belkis; Guzmán González, Carlos Alberto Abstract: Abstract Nanostructured catalysts of platinum (Pt) supported on commercial TiO2, as well as TiO2-CeO2 (1, 5 and 10 wt% CeO2), were synthesized through the Sol-Gel and impregnation method doped to 1 wt% of Platinum, in order to obtain a viable photocatalytic material able to oxidate organic pollutants under the visible light spectrum. The materials were characterized by different spectroscopy and surface techniques such as Specific surface area (BET), X-ray photoelectron spectroscopy (XPS), XRD, and TEM. The results showed an increase in the diameter of the pore as well as the superficial area of the supports as a function of the CeO2 content. TEM images showed Pt nanoparticles ranking from 2–7 nm, a decrease in the particle size due to the increase of CeO2. The XPS showed oxidized Pt2+ and reduced Pt0 species; also, the relative abundance of the elements Ce3+/Ce4− and Ti4+ on the catalysts. Additionally, a shift in the Eg band gap energy (3.02–2.82 eV) was observed by UV–vis, proving the facticity of applying these materials in a photocatalytic reaction using visible light. Finally, all the synthesized materials were tested on their photocatalytic oxidation activity on a herbicide used worldwide; 2,4-Dichlorophenoxyacetic acid, frequently use in the agriculture in the state of Jalisco. The kinetics activity of each material was measured during 6 h of reaction at UV–Vis 190–400 nm, reaching a removal efficiency of 98% of the initial concentration of the pollutant in 6 h, compared to 32% using unmodified TiO2 in 6 h. Description: Artículo

2022-10-01T00:00:00Z Rivera Sánchez, Alejandro Arturo Navarro del Toro, Guillermo José http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1424 2022-09-26T21:11:36Z 2020-12-01T00:00:00Z

Title: Qué sabe el consumidor del daño ambiental provocado por el vaso desechable y la necesidad de sustituirlo Authors: Rivera Sánchez, Alejandro Arturo; Navarro del Toro, Guillermo José Abstract: Resumen El objetivo del presente trabajo fue conocer la cantidad y la frecuencia con que las personas de Arandas en la región de los Altos de Jalisco emplean los vasos desechables para luego saber qué tan dispuestas están en utilizar vasos comestibles elaborados con gelatina natural. Al respecto, vale comentar que estos no solo pueden ser nutritivos para quienes los consuman (pues la gelatina es un nutriente fortificante creada a partir de la piel y el hueso de cerdos y vacas), sino que también se podrían degradar en pocos días o ser ingeridos por los animales. Para recabar la información se empleó una encuesta constituida por seis interrogantes, la cual fue aplicada a 31 personas por vía telefónica y a otras 345 de manera personal (en ambos casos se aplicaron a jóvenes y adultos). Los resultados demuestran que los pobladores de esa localidad usan considerablemente vasos de plásticos en los distintos eventos que se realizan cada semana, los cuales son más numerosos en las fiestas patronales o de fin de año. Aun así, estas personas estarían dispuestas a cambiar estos hábitos, aunque para ello se deben tomar medidas que no afecten a las empresas de esa zona, las cuales trabajan principalmente con plásticos y generan un alto porcentajes de empleos. Abstract The objective of this work was to know the amount and frequency with which the people of Arandas in the Altos de Jalisco region use disposable cups and then know how willing they are to use edible cups made with natural gelatin. In this regard, it is worth commenting that these can not only be nutritious for those who consume them (since gelatin is a fortifying nutrient created from the skin and bone of pigs and cows), but they could also be degraded in a few days or be ingested by animals. To collect the information, a survey consisting of six questions was used, which was applied to 31 people by telephone and another 345 personally (in both cases they were applied to young people and adults). The results show that the residents of that town considerably use plastic cups in the different events that take place each week, which are more numerous during the patron saint festivities or at the end of the year. Even so, these people would be willin g to change these habits, although for this, measures must be taken that do not affect the companies in that area, which work mainly with plastics and generate a high percentage of jobs Resumo O objetivo deste trabalho foi conhecer a quantidade e a frequência com que os arandas da região dos Altos de Jalisco usam os copos descartáveis e a disposição para usar os copos comestíveis feitos com gelatina natural. Nesse sentido, vale comentar que es tes não só podem ser nutritivos para quem os consome (já que a gelatina é um nutriente fortificante criado a partir da pele e do osso de porcos e vacas), mas também podem se degradar em poucos dias ou ser. ingerido por animais. Para a recolha das informaçõ es, foi utilizado um inquérito composto por seis questões, que foi aplicado a 31 pessoas por telefone e outras 345 pessoalmente (em ambos os casos foram aplicados a jovens e adultos). Os resultados mostram que os moradores daquela cidade usam bastante os copos plásticos nos diversos eventos que acontecem a cada semana, sendo mais numerosos durante as festas da padroeira ou no final do ano. Mesmo assim, essas pessoas estariam dispostas a mudar esses hábitos, mas para isso devem ser tomadas medidas que não afetem as empresas da área, que trabalham principalmente com plásticos e geram um alto percentual de empregos. Description: Artículo

2020-12-01T00:00:00Z Marizcal Barba, Adriana Sánchez Burgos, Jorge Alberto Zamora Gasga, Víctor Pérez Larios, Alejandro http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1307 2022-03-11T16:21:52Z 2022-03-01T00:00:00Z

Title: Study of the Response Surface in the Photocatalytic Degradation of Acetaminophen Using TiO2 Authors: Marizcal Barba, Adriana; Sánchez Burgos, Jorge Alberto; Zamora Gasga, Víctor; Pérez Larios, Alejandro Abstract: Abstract An effective way to obtain the optimal parameters of a process or experiment is the response surface method. Using the Box–Behnken design further decreases the number of experiments needed to obtain sufficient data to obtain a reliable equation. From the equation, it is possible to predict the behavior of the response with respect to the combination of variables involved. In this study we evaluated the photocatalytic activity of the synthesized TiO2 for the degradation of acetaminophen, a frequently used and uncontrolled drug that has been detected with increasing frequency in wastewater effluents. The variables used for this study were pH, contaminant concentration (acetaminophen) and catalyst dose. We found, with a 95% confidence level, that 99% of the contaminant can be degraded to pH 10, contaminant to 35 mg/L and a catalyst dose of 0.15 g TiO2. Description: Artículo

2022-03-01T00:00:00Z Carmona Peña, María del Refugio González Pérez, Cándido González Anaya, Ana Gabriela http://repositorio.cualtos.udg.mx:8080/jspui/handle/123456789/1072 2023-02-21T16:23:42Z 2021-03-22T00:00:00Z

Title: A Business Effort in Favor of Sustainability, the Case of Combustibles Ecologicos de Acatic SA de CV Authors: Carmona Peña, María del Refugio; González Pérez, Cándido; González Anaya, Ana Gabriela Abstract: Abstract In this work we present the case of a company born from an individual dream that has made its way to success from one of the most unsuspected activities: recycling. Against all odds, in our globalized world that prioritizes the generation of economic wealth to the detriment of natural resources, an ingenious initiative emerged that has turned bad into an economically enviable business. In the most diverse daily uses of factories, agriculture and even homes, the recycling of hazardous materials is generated. Against all logic and with a persistence worthy of recognition, an artisan company was founded in a rural population that has transcended regions and above all archaic thoughts that privilege profits over everything else. With the passage of time, the artisan work was transformed to become an industrial company that generates great resources with the paradox that it has become a business to avoid environmental pollution when the latter is the result of excessive economic growth.

2021-03-22T00:00:00Z