Alejandro López-Ortíz
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View article: Moderate-Temperature Carbon Capture Using Thermally Pre-Treated Dolomite: A Novel Approach
Moderate-Temperature Carbon Capture Using Thermally Pre-Treated Dolomite: A Novel Approach Open
This study investigates a novel approach to moderate-temperature carbon capture by examining the enhanced performance of thermally pre-treated dolomite. To obtain mixed oxides, dolomite samples were prepared via calcination in a quartz cyl…
View article: Sustainable Reduction of Strontium Sulfate Using Bioethanol: A Pathway to Carbon-Neutral SrS Production
Sustainable Reduction of Strontium Sulfate Using Bioethanol: A Pathway to Carbon-Neutral SrS Production Open
Achieving net-zero carbon emissions, this study introduces a sustainable pathway for reducing strontium sulfate (SrSO4) and celestite ore to strontium sulfide (SrS) using biofuels (biomethane, bioethanol) derived from agro-industrial waste…
View article: Photocatalytic reduction of CO2 over Ni-CuxO thin films towards formic acid production
Photocatalytic reduction of CO2 over Ni-CuxO thin films towards formic acid production Open
Copper oxide (CuO) is an abundant and low-cost material, which is active as a photocatalyst under visible light due to its narrow band gap (1.3 eV). In the present work, CuO thin films at different Ni doping amounts (5, 10, and 30 % mol) w…
View article: Pyrolysis Kinetics of Byrsonima crassifolia Stone as Agro-Industrial Waste through Isoconversional Models
Pyrolysis Kinetics of Byrsonima crassifolia Stone as Agro-Industrial Waste through Isoconversional Models Open
This study is aimed at the analysis of the pyrolysis kinetics of Nanche stone BSC (Byrsonima crassifolia) as an agro-industrial waste using non-isothermal thermogravimetric experiments by determination of triplet kinetics; apparent activat…
View article: Study of NiFe2O4/Cu2O p-n heterojunctions for hydrogen production by photocatalytic water splitting with visible light
Study of NiFe2O4/Cu2O p-n heterojunctions for hydrogen production by photocatalytic water splitting with visible light Open
To date, synthesis of visible light-active materials for photocatalytic water splitting is a promising challenge for future applications, e.g., photocatalytic reactors for hydrogen production with solar energy. Type p-n heterojunctions are…
View article: Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites
Formic acid and hydrogen generation from the photocatalytic reduction of CO2 on visible light activated N-TiO2/CeO2/CuO composites Open
Ternary of titania-based composites were prepared in two steps. First, pure and nitrogen-doped titanium dioxide powders were obtained using Pechini´s method. Then, these powders were impregnated with 3% wt. of cerium and copper oxide parti…
View article: Effect of the synthesis method on the MnCo<sub>2</sub>O<sub>4</sub> towards the photocatalytic production of H<sub>2</sub>
Effect of the synthesis method on the MnCo<sub>2</sub>O<sub>4</sub> towards the photocatalytic production of H<sub>2</sub> Open
In the present work, manganese cobaltite (MnCo 2 O 4 ) spinel (MCO) was synthetized by Pechini and hydrothermal method, characterized and photocatalytically evaluated toward H 2 production through water splitting under visible-light irradi…
View article: Complex Dielectric Function via the Kramers-Kronig Analysis in the Valence Electron Energy-Loss spectrum for ZnTiO<sub>3</sub>.
Complex Dielectric Function via the Kramers-Kronig Analysis in the Valence Electron Energy-Loss spectrum for ZnTiO<sub>3</sub>. Open
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View article: Reduction and oxidation kinetics of NiWO<sub>4</sub> as an oxygen carrier for hydrogen storage by a chemical looping process
Reduction and oxidation kinetics of NiWO<sub>4</sub> as an oxygen carrier for hydrogen storage by a chemical looping process Open
H 2 storage of NiWO 4 with a volumetric storage density of 496 g L −1 was studied and evaluated under a chemical looping reaction scheme by TGA. Results confirms the high potential of NiWO 4 to current oxygen carriers reported in the liter…
View article: Methanol and Triethanolamine Effect as Sacrifice Agents in the Photocatalytic Production of Hydrogen over Zinc Titanates
Methanol and Triethanolamine Effect as Sacrifice Agents in the Photocatalytic Production of Hydrogen over Zinc Titanates Open
de la Torre Sáenz for their support in performing the XRD, TEM and BET analyzes.Also, thanks must be regarded to the National Nanotechnology Laboratory (NANOTECH) at CIMAV Chihuahua for
View article: The thermodynamic evaluation and process simulation of the chemical looping steam methane reforming of mixed iron oxides
The thermodynamic evaluation and process simulation of the chemical looping steam methane reforming of mixed iron oxides Open
Chemical looping steam reforming (CL-SMR) thermodynamic analysis and process simulation using Fe2MnO4 as an oxygen carrier.
View article: Comparative Study of Zn2Ti3O8 and ZnTiO3 Photocatalytic Properties for Hydrogen Production
Comparative Study of Zn2Ti3O8 and ZnTiO3 Photocatalytic Properties for Hydrogen Production Open
In the present work, zinc titanates (ZTO) as photocatalysts were synthesized, characterized, and evaluated aiming to study their photocatalytic properties for hydrogen production under visible-light irradiation and employing MeOH (methanol…
View article: Sulfur dioxide exploitation by electrochemical oxidation of sulfite in near-neutral pH electrolytes: A kinetics and mechanistic study
Sulfur dioxide exploitation by electrochemical oxidation of sulfite in near-neutral pH electrolytes: A kinetics and mechanistic study Open
Electrochemical oxidation of sulfite ions offers an efficient and profitable approach to the conversion of sulfur dioxide, a harmful air pollutant, into valuable by-products via flue gas desulfurization. Here, the electrochemical oxidation…
View article: Arbitrary Overlap Constraints in Graph Packing Problems
Arbitrary Overlap Constraints in Graph Packing Problems Open
In earlier versions of the community discovering problem, the overlap between communities was restricted by a simple count upper-bound. In this paper, we introduce the [Formula: see text]-Packing with [Formula: see text]-Overlap problem to…
View article: Lower Bounds for Graph Exploration Using Local Policies
Lower Bounds for Graph Exploration Using Local Policies Open
We give lower bounds for various natural node- and edge-based local strategies for exploring a graph. We consider this problem both in the setting of an arbitrary graph as well as the abstraction of a geometric exploration of a space by a …
View article: Inverted Treaps
Inverted Treaps Open
We introduce a new representation of the inverted index that performs faster ranked unions and intersections while using similar space. Our index is based on the treap data structure, which allows us to intersect/merge the document identif…
View article: Recognition of Triangulation Duals of Simple Polygons With and Without Holes
Recognition of Triangulation Duals of Simple Polygons With and Without Holes Open
We investigate the problem of determining if a given graph corresponds to the dual of a triangulation of a simple polygon. This is a graph recognition problem, where in our particular case we wish to recognize a graph which corresponds to …
View article: Recognition of Triangulation Duals of Simple Polygons With and Without\n Holes
Recognition of Triangulation Duals of Simple Polygons With and Without\n Holes Open
We investigate the problem of determining if a given graph corresponds to the\ndual of a triangulation of a simple polygon. This is a graph recognition\nproblem, where in our particular case we wish to recognize a graph which\ncorresponds …
View article: Arbitrary Overlap Constraints in Graph Packing Problems
Arbitrary Overlap Constraints in Graph Packing Problems Open
In earlier versions of the community discovering problem, the overlap between communities was restricted by a simple count upper-bound [17,5,11,8]. In this paper, we introduce the $\Pi$-Packing with $\alpha()$-Overlap problem to allow for …
View article: Data Structures and Advanced Models of Computation on Big Data (Dagstuhl Seminar 16101)
Data Structures and Advanced Models of Computation on Big Data (Dagstuhl Seminar 16101) Open
This report documents the program and the outcomes of Dagstuhl Seminar 16101 "Data Structures and Advanced Models of Computation on Big Data". In today's computing environment vast amounts of data are processed, exchanged and analyzed. The…