Cd 1-xZn xS solid solutions supported on ordered mesoporous silica (SBA-15): Structural features and photocatalytic activity under visible light
Por:
MacÍas-Sánchez S.A., Nava R., Hernández-Morales V., Acosta-Silva Y.J., Gómez-Herrera L., Pawelec B., Al-Zahrani S.M., Navarro R.M., Fierro J.L.G.
Publicada:
1 ene 2012
Resumen:
A series of Cd 1-xZn xS (x = 0.05-0.3) photocatalysts supported on ordered mesoporous silica (SBA-15) were prepared and investigated for hydrogen production from water splitting under visible light. Textural, structural and surface photocatalyst properties are determined by N 2 adsorption isotherms, UV-vis, Raman and XPS and related to the activity results in hydrogen production. Raman and XRD results indicated a mutual interaction between Cd and Zn, forming nanoparticles of Cd 1-xZn xS solid solutions. All Cd 1-xZn xS/SBA-15 samples showed relatively high activities for hydrogen evolution. The hydrogen production rate is found to increase gradually when the zinc concentration on photocatalysts increases from 0.05 to 0.2, achieving a maximum for the photocatalyst with zinc concentration equal to 0.2. Variation in photoactivity is discussed in terms of modification in the conduction band and light absorption ability of Cd 1-xZn xS particles derived from the changes in the Zn concentration in the Cd 1-xZn xS solid solution. Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Filiaciones:
MacÍas-Sánchez S.A.:
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), 76000 Querétaro, Qro., Mexico
Nava R.:
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), 76000 Querétaro, Qro., Mexico
Hernández-Morales V.:
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), 76000 Querétaro, Qro., Mexico
Acosta-Silva Y.J.:
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), 76000 Querétaro, Qro., Mexico
Gómez-Herrera L.:
División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), 76000 Querétaro, Qro., Mexico
Pawelec B.:
Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
Al-Zahrani S.M.:
Chemical Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia
Navarro R.M.:
Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
Fierro J.L.G.:
Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
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