| Título: | Effects of γ-Irradiation and Ageing on Surface and Catalytic Properties of Nano-sized CuO/MgO System |
| Autores: |
El-Molla,Sahar A. Ismail,Sahar A. Ibrahim,Marwa M. |
| Fecha: | 2011-09-01 |
| Publicador: | SCIELO |
| Fuente: |
 |
| Tipo: | journal article |
| Tema: |
Nano-materials metal oxides γ-irradiation catalytic activity catalytic stability |
| Descripción: | 0.2 CuO/MgO system prepared by impregnation method was calcined at 350 and 450 °C. The effects of γ-rays (0.2-1.6 MGy) on its structure, surface and catalytic properties were investigated by using XRD, N2-adsorption at -196 °C and catalytic conversion of iso-propanol at 150-275 °C using a flow technique. The results revealed that the investigated solids consisted of nano-sized MgO as a major phase besides CuO and trace amount of Cu2O. γ-Irradiation of the solids investigated exerted measurable changes on their surface and catalytic properties dependent on the calcination temperature and dose of irradiation. The catalysts investigated acted as active dehydrogenation solids. The five years-ageing of different solids showed limited changes of their surface and catalytic properties indicating a good catalytic stability of the irradiated prepared solids. |
| Idioma: | Inglés |
1 | 6 Fracturas maxilofaciales y factores asociados en derechohabientes del IMSS Campeche, México: Análisis retrospectivo 1994-1999 por Medina-Solis,Cario Eduardo,Córdova-González,José Luis,Casanova-Rosado,Alejandro José,Zazueta-Hernández,Maria Alejandra |
2 | 7 Factores de riesgo de mortalidad en el hijo de madre toxémica por Gómez-Gómez,Manuel,Danglot-Banck,Cecilia,García-de la Torre,Guadalupe Silvia,Antonio-Ocampo,Abdiel,Fajardo-Gutiérrez,Arturo,Sánchez-García,Maria Luisa,Ahumada-Ramírez,Elias |
3 Cerámicas mexicanas para cicatrización de piel por Piña-Barba,María Cristina,Tejeda-Cruz,Adriana,Regalado-Hernández,Miguel Ángel,Arenas-Reyes,María Isabel,Martín-Mandujano,Salvador,Montalvo,César | 8 I. De la enseñanza tutoral al aprendizaje a distancia por Cravioto,Alejandro |
4 Seguimiento de egresados de un diplomado en enseñanza de la Medicina por Ponce de León-Castañeda,Ma. Eugenia,Ruíz-Alcocer,Ma. del Carmen,Lozano-Sánchez,J. Rogelio | 9 II. La vocación científica: compromisos con el cambio permanente y la educación continua por Kretschmer,Roberto |
5 Primer estudio de teledermatología en México: Una nueva herramienta de salud pública por Lepe,Verónica,Moneada,Benjamín,Castanedo-Cázares,Juan Pablo,Martínez-Rodríguez,Alejandra,Mercado-Ceja,Sergio M,Gordillo-Moscoso,Antonio | 10 |