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Obeso-Estrella R, Pawelec B, Mota N, Flores-Sanchez LA, Quintana-Melgoza JM, Yocupicio-Gaxiola RI, Zepeda TA. Method for analyzing HR-TEM micrographs to propose and/or describe structures and their interaction in crystalline materials. MethodsX 2022; 9:101855. [PMID: 36187157 PMCID: PMC9523379 DOI: 10.1016/j.mex.2022.101855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 09/04/2022] [Indexed: 10/29/2022] Open
Abstract
A general and versatile method for the analysis and processing of HR-TEM data useful for several applications is presented. The first utility is to identify the structures seen in the micrographs; also can be extended to propose the interaction of structure dynamics between various phases; and also it can be hybridized with the chemical method to make a proposal of new structure and/or phase. The general method consisted of four steps: 1) micrograph pretreatment, 2) measurement of planar distances, 3) structure identification, and 4) structure corroboration. Crystallographic planes were immediately identified by comparing the interplanar distances. Next, crystallographic data were collected from the Crystal Structures Database (ICSD) and introduced into Diamond software to visualize the planes in each structure. In addition, from the zone axis point of view it must show the planes aligned, similar as is observed in the HR-TEM micrograph.•It was possible establish the growth mechanism of the different structures by identifying how is the structural interaction between the different oxides and sulfide phases.•Method was successful applied to propose a new TiCoMoS sulfide phase through HR-TEM results.•The method can also be extended to other areas where structural studies with HR-TEM are viable, such as biology, electronics, among others.
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Affiliation(s)
- R Obeso-Estrella
- Universidad Autonoma de Baja California, Calzada Universidad 14418 Parque Industrial Internacional Tijuana, Baja California, Mexico C.P. 22390
| | - B Pawelec
- Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2, L10, Cantoblanco, 28049 Madrid, Spain
| | - N Mota
- Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie 2, L10, Cantoblanco, 28049 Madrid, Spain
| | - L A Flores-Sanchez
- Universidad Autonoma de Baja California, Calzada Universidad 14418 Parque Industrial Internacional Tijuana, Baja California, Mexico C.P. 22390
| | - J M Quintana-Melgoza
- Universidad Autonoma de Baja California, Calzada Universidad 14418 Parque Industrial Internacional Tijuana, Baja California, Mexico C.P. 22390
| | - R I Yocupicio-Gaxiola
- Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California 22860, México
| | - T A Zepeda
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Ensenada, Baja California C.P. 22860, México
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Soto-Arteaga CE, Guzmán-Cruz MA, Esqueda-Barron Y, Alonso-Nuñez G, Zepeda TA, Fuentes-Moyado S, Díaz de León JN. Triblock Copolymer Effect During the Synthesis of ZrO2-TiO2 Mixed Oxides Supports for NiW Hydrodesulfurization Catalysts. Top Catal 2022. [DOI: 10.1007/s11244-022-01649-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mendoza Merlano CJ, Zepeda TA, Alonso-Nuñez G, Diaz de Leon JN, Manrique C, Echavarría Isaza A. Effect of crystal size on the acidity of nanometric Y zeolite: number of sites, strength, acid nature, and dehydration of 2-propanol. NEW J CHEM 2022. [DOI: 10.1039/d2nj01530g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystallinity damage in acid Y zeolite affects the direct relationship between the number of acid sites or conversion of 2-propanol and the zeolite size and the selectivity of 2-propene in nanosized Y zeolite.
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Affiliation(s)
- C. J. Mendoza Merlano
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
| | - T. A. Zepeda
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - G. Alonso-Nuñez
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - J. Noe Diaz de Leon
- Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología(CNyN), Km. 107 Carretera Tijuana-Ensenada Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, Mexico
| | - C. Manrique
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
| | - A. Echavarría Isaza
- Universidad de Antioquia, Grupo Catalizadores y Adsorbentes, Calle 70 No. 52-21, Medellín, Colombia
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Guzmán-Cruz MA, Ramesh-Kumar C, Acosta-Alejandro M, Frías-Márquez DM, Domiguez D, Zepeda TA, Fuentes-Moyado S, Díaz de León JN. Synthesis of Aluminium Doped Na-Titanate Nanorods and Its Application as Potential CO2 Hydrogenation Catalysts. Catal Letters 2019. [DOI: 10.1007/s10562-019-02902-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Suresh C, Cabrera LP, Aliaga JA, de León JND, Zepeda TA, Fuentes S, Berhault G, Alonso-Núñez G. Formation of Co-Promoted MoS2 Fullerene-Like Nanostructures on SBA-15 as Effective Hydrodesulfurization Catalyst. Catal Letters 2016. [DOI: 10.1007/s10562-016-1936-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hernández JA, Gómez SA, Zepeda TA, Fierro-González JC, Fuentes GA. Insight into the Deactivation of Au/CeO2 Catalysts Studied by In Situ Spectroscopy during the CO-PROX Reaction. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00739] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José A. Hernández
- Academia de Biotecnología y Farmacia, Unidad Profesional Interdisciplinaria de Ingeniería-Guanajuato (UPIIG-IPN), Silao, Guanajuato 07738, México
| | - Sergio A. Gómez
- Departamento de Ingeniería Procesos e Hidráulica, Universidad A. Metropolitana-Iztapalapa, A.P. 55-534, México D.F. 09340, México
| | - T. A. Zepeda
- Centro de Nanociencias y Nanotecnología- UNAM, Ensenada B.C., 22800, México
| | - Juan C. Fierro-González
- Departamento de Ingeniería Química, Instituto Tecnológico de Celaya, Celaya, Guanajuato 38010, México
| | - Gustavo A. Fuentes
- Departamento de Ingeniería Procesos e Hidráulica, Universidad A. Metropolitana-Iztapalapa, A.P. 55-534, México D.F. 09340, México
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Morales F, Viniegra M, Arroyo R, Córdoba G, Zepeda TA. CO oxidation over CuO/ZrO2 catalysts: effect of loading and incorporation procedure of CuO. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/143307510x12639910071872] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- F. Morales
- Departamento de Química, Universidad Autónoma Metropolitana– Iztapalapa, 09340 México, DF, Mexico
| | - M. Viniegra
- Departamento de Química, Universidad Autónoma Metropolitana– Iztapalapa, 09340 México, DF, Mexico
| | - R. Arroyo
- Departamento de Química, Universidad Autónoma Metropolitana– Iztapalapa, 09340 México, DF, Mexico
| | - G. Córdoba
- Departamento de Química, Universidad Autónoma Metropolitana– Iztapalapa, 09340 México, DF, Mexico
| | - T. A. Zepeda
- Centro de Nanociencias y Nanotecnología UNAM, Km. 107 Carretera Tijuana-Ensenada, CP 22800, Ensenada, BC, Mexico
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Zepeda TA, Pawelec B, Olivas A, Fierro JLG. Effect of stacking of MoS2slabs on catalytic performance of supported CoMo-catalysts in hydrodesulfurization of dibenzothiophene. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/143307507x196257] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Rodríguez-Garcia ME, de Lira C, Hernández-Becerra E, Cornejo-Villegas MA, Palacios-Fonseca AJ, Rojas-Molina I, Reynoso R, Quintero LC, Del-Real A, Zepeda TA, Muñoz-Torres C. Physicochemical characterization of nopal pads (Opuntia ficus indica) and dry vacuum nopal powders as a function of the maturation. Plant Foods Hum Nutr 2007; 62:107-12. [PMID: 17674207 DOI: 10.1007/s11130-007-0049-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2006] [Accepted: 07/09/2007] [Indexed: 05/16/2023]
Abstract
This paper presents the physicochemical and nutrimental characterization of fresh nopal (Opuntia ficus indica, Redonda variety) and nopal powder produced at different stages of development. Nopal powder was obtained by dry vacuum technique using 10(2) Torr and low temperature (40 degrees C). The results showed that the nutrimental and mineral composition of nopal changes as a function of the maturation as follow: The ash content increases from 18.41 for nopalitos (60 g of weight) to 23.24% (nopal pads 200 g); calcium content increases from 1.52 to 3.72%, while phosphorous exhibits an opposite trend: 0.43 to 0.27%, respectively. Calcium oxalate was determined by X-ray diffraction and SEM microscopy and quantified by using atomic absorption spectroscopy. Calcium oxalate decreases from 7.95 to 3.47 mg/g and the Ca/P ratio varies from 3.6 to 11. The soluble fibre decreases from 25.22 to 14.91%, while insoluble fibre increases from 29.87 to 41.65%. These results suggest that nopal could be an important source of minerals within the diets of people in Mexico and the rest of Latin America.
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Affiliation(s)
- M E Rodríguez-Garcia
- Centro de Física Aplicada y Tecnología Avanzada, Departamento de Nanotecnología, Universidad Nacional Autónoma de México, Campus Juriquilla, AP 1-1010, CP 76000, Querétaro, México.
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