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http://cio.repositorioinstitucional.mx/jspui/handle/1002/1212| THE DEVELOPMENT OF NEW MATERIALS FOR PHOTOCATALYTIC HYDROGEN GENERATION | |
| Takawira Mumanga | |
| Luis Armando Diaz-Torres | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Photocatalysis Hydrogen Graphitic carbon nitride Barium aluminate Magnesium aluminate Materials | |
| "This work presents the development, characterization, and evaluation of 2D materials and Alkaline Metal Aluminates, namely Graphitic Carbon Nitrides (g-C3N4) and Barium or Magnesium Aluminates (MAl2O4: M=Ba or Mg) for the purpose of hydrogen generation. Graphitic carbon nitrides were synthesized by calcinating nitrogen-rich precursors at 550 °C whilst the alkaline metal aluminates were prepared by a combustion synthesis and were annealed in different gas atmospheres. The characterization of these photocatalysts was carried out through techniques such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Diffuse Reflectance Spectroscopy (DRS), Energy Dispersive Spectroscopy (EDS), Raman Spectroscopy (RS), Brunauer-Emmett-Teller (BET) surface area analysis, Diffuse Reflectance Spectroscopy (DRS), Photoluminescence measurements (PL), and Electrochemical Impedance Spectroscopy (EIS). The g-C3N4 photocatalysts were evaluated comparatively in Hydrogen Evolution Reactions (HERs) using irradiation from either low-cost visible (405 nm or 440 nm) 15 W/m LED strips or from a UV (254 nm, 4.4 mW/cm2) pencil lamp. A high hydrogen production rate of 1622 mol.g-1.h-1, corresponding to an AQY of 3.2%, was achieved under UV irradiation using g-C3N4 p-n homojunction which was synthesized from Thiourea. The same irradiation source rendered a maximum H2 generation rate of 97 μmol.h-1.g-1 using the carbon annealed magnesium aluminates. The overall results of these studies reveal the potential of these photocatalysts and major photocatalysis enhancement strategies based on conductivity modulation and heat treatment." | |
| 2021-05 | |
| Tesis de doctorado | |
| Inglés | |
| León, Guanajuato | |
| Público en general | |
| Mumanga, (2021). "The development of New Materials for Photocatalytic Hydrogen Generation". Tesis de Doctorado en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 60 pp. | |
| CATÁLISIS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | DOCTORADO EN CIENCIAS (ÓPTICA) |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| 17989.pdf | Texto completo / Full text | 2.18 MB | Adobe PDF | Visualizar/Abrir |