División de Nanociencias y Materiales: Envíos recientes
Mostrando ítems 161-180 de 595
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Magnetocaloric effect in ErNi2 melt-spun ribbons
(Elsevier, 2019)"ErNi2 ribbons were produced by rapid solidification using the melt spinning technique. Their structural, magnetic and magnetocaloric properties in the as-solidified state were studied by X-ray diffraction, scanning electron ... -
Plasmonic sensing of aqueous-divalent metal ions by biogenic gold nanoparticles
(Hindawi Publishing Corporation, 2019)"The chemical interaction between biogenic gold nanoparticles (AuNPs) and several metal (II) ions can be regarded as a practical, twofold, colorimetric, and plasmon resonance sensing method for the recognition of some ... -
Tailoring thermomechanical treatment of Ni-Fe-Ga melt-spun ribbons for elastocaloric applications
(Elsevier, 2019)"In the present work, the structural, mechanical and shape memory properties of Ni55Fe16Ga29 (at.%) melt-spun ribbons have been studied with a prospective of application in the elastocaloric devises. Particularly, a special ... -
Modified metallic oxides for efficient photocatalysis
(IntechOpen, 2018)"The aim of the chapter is to present modified materials like alternatives for conventional photocatalyst such as titanium dioxide. Discussion about silver/graphene nanoparticles-modified zinc oxide for the degradation of ... -
Oxygenated surface of carbon nanotube sponges: electroactivity and magnetic studies
(American Chemical Society, 2019)"We report the synthesis of nitrogen-doped carbon nanotube sponges (N-CNSs) by pyrolysis of solutions of benzylamine, ferrocene, thiophene, and isopropanol-based mixture at 1020 degrees C for 4 h using an aerosol-assisted ... -
Recuperación mejorada de petróleo con D-Limoneno diluido en salmuera
(05/02/2020)D-Limonene, a compound consisting of terpenes in its dextrogyrous form, is used as a degreaser, hydrocarbon waste cleaner and as a sand oil separator. In this thesis, the use of this solvent is proposed as a chemical ... -
Diseño, síntesis y evaluación de catalizadores CeO2/grafeno modificados con ZrO2 y/o NiO para la reacción de Water Gas Shift
(2020-02-05)"Las investigaciones en el área de catálisis han tomado mucho auge en la actividad industrial, y especialmente en la industria del petróleo e hidrocarburos, por tal motivo se llevó a cabo la síntesis de catalizadores con ... -
Síntesis, caracterización y evaluación de desempeño de fotocatalizadores híbridos, base cerámica, para la fotodegradación de fenol.
(2020-01-29)"El fenol se encuentra en la lista de los principales contaminantes de la Organización Mundial de la Salud (OMS), el cual pertenece a los llamados compuestos recalcitrantes que son altamente persistentes en el medio ambiente, ... -
Estudio de los efectos magnetocalórico, elastocalórico y de estado vítreo de deformación en aleaciones Heusler basadas en Ni-Mn
(2020-01)"En este trabajo se realizaron estudios del efecto elastocalórico, magnetocalórico y del estado vítreo de deformación en aleaciones de base Ni-Mn. Algunas aleaciones de base Ni-Mn ferromagnéticas presentan la transformación ... -
Obtención de membranas mediante electrospinning para tratamiento de agua con alto contenido de sólidos
(2019-12-12)"Hoy en día, la creciente tasa de población en el mundo ha traído como unas de las principales consecuencias la sobreexplotación de agua para consumo humano. En México, se tienen 471.5 mil millones de metros cúbicos de ... -
Modificación y evaluación de polímeros semiconductores para su potencial uso en dispositivos fotovoltaicos
(2019-11-15)"Actualmente las celdas perovskitas de vanguardia presentan una configuración convencional tipo n-i-p que consisten en óxido de titanio (TiO2), semiconductor tipo n, cubierto por la perovskita y una capa transportadora de ... -
Construction of 3D self-supported electrodes of amorphous Ni(OH)2 with rationally nanostructued architecture for supercapacitor applications
(2019-11-11)"Amorphous Ni(OH)2 coating on nanostructured nickel scaffolds with rational archietcture have been successfully fabricated by a facile process of templated-directed electrodeppsition and surface oxidation treatment. ... -
Propiedades magnéticas de agregados de metales 3d adsorbidos sobre superficies no magnéticas
(01/11/2019)The magnetic elements of the 3d row of the periodic table, have been extensively studied from an experimental and theoretical points of view. The study of these systems has been encouraged because their possible applications ... -
Síntesis de carburos, sulfuros y boruros de renio y su evaluación en la producción de hidrógeno a partir de biomasa
(2019-10)"En esta tesis de doctorado se llevó a cabo la síntesis mecanoquímica de carburos (Re2C (2:1) y Re2C (1:1)), boruros (Re3B y ReB2) y sulfuros de renio (ReS2 (1:2) y ReS2 (2:7)). Estos materiales fueron caracterizados por ... -
Modification of porous nickel electrodes with silver nanoparticles for hydrogen production
(Elsevier, 2018)"Silver nanoparticles were electrodeposited into the surface of a macroporous Ni electrode. The developed electrodes were characterized morphologically by confocal laser scanning microscopy and field emission scanning ... -
High temperature martensitic transformation and giant magnetocaloric effect in Ni40Co10Mn41Sn9 melt-spun ribbons
(Elsevier, 2018)"We report a large magnetic entropy change associated with a high-temperature martensitic transformation in Ni40Co10Mn41Sn9 (at. %) melt-spun ribbons. The ribbons underwent a first-order forward martensitic transition and ... -
Effect of Mg as impurity on the structure of mesoporous γ-Al203: efficiency as catalytic support in HDS of DBT
(Walter de Gruyter GmbH, 2018)"This work shows the study of two alumina materials synthesized from aluminum sulfate with different purity by hydrolysis-precipitation route. The main difference between the aluminum salt precursors was the lower cost of ... -
Traveling wave solutions for wave equations with two exponential nonlinearities
(Walter de Gruyter GmbH, 2018)"We use a simple method that leads to the integrals involved in obtaining the travelling-wave solutions of wave equations with one and two exponential nonlinearities. When the constant term in the integrand is zero, implicit ... -
Two integrable classes of Emden-Fowler equations with applications in astrophysics and cosmology
(Walter de Gruyter GmbH, 2018)"We show that some Emden–Fowler (EF) equations encountered in astrophysics and cosmology belong to two EF integrable classes of the type d2z/dχ2=Aχ−λ−2zn for λ=(n−1)/2 (class 1), and λ=n+1 (class 2). We find their corresponding ... -
Riccati parametric deformations of the Cornu spiral
(Walter de Gruyter GmbH, 2018)"In this article, a parametric deformation of the Cornu spiral is introduced. The parameter is an integration constant which appears in the general solution of the Riccati equation and is related to the Fresnel integrals. ...