Effects of γ-Irradiation and Ageing on Surface and Catalytic Properties of Nano-sized CuO/MgO System
DOI:
https://doi.org/10.29356/jmcs.v55i3.814Keywords:
Nano-materials, metal oxides, γ-irradiation, catalytic activity, catalytic stability.Abstract
0.2 CuO/MgO system prepared by impregnation method was calcined at 350 and 450 ºC. 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 ºC and catalytic conversion of isopropanol at 150-275 ºC 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.
Downloads
References
Diez, V. K.; Apesteguia, C. R.; Di Cosimo, J. I. Catal. Today 2000, 63, 53-62.
Xu, M.; Gines, M. G. L.; Hilmaen, A.-M.; Stephens, B. L.; Iglesia, E. J. Catal.1997, 171, 130-147.
Zhang, G.; Hattori, H.; Tanabe, K. Appl. Catal. 1988, 36, 189-197.
Dicosimo, J. I.; Diez, V. K.; Apesteguia, C. R. Appl. Catal. 1996, 137, 149-166.
Kurokawa, H.; Kato, T.; Kuwabara, T.; Ueda, W.; Morikawa, Y.; Moro-Oka, Y.; Ikawa, T. J. Catal. 1990, 126, 208-218.
El-Molla, S. A. Appl. Catal. A. 2005, 280, 189-197.
El-Molla, S. A. Appl. Catal. A. 2006, 298, 103-108.
Mucka, V.; Mižík, P. Radiat. Phys. Chem. 1991, 38, 291-294.
Andreev, A.; Kafedjiiski, V.; Halachev, T. ; Kunev, B. ; Kaltchev, M. Appl. Catal. 1991, 78, 199-211.
Spalaris, C. N ; Bupp, L. P. ; Gilbert, E. C. J. Phys. Chem. 1957, 61, 350-354.
El-Nabarawy, Th.; EL-Shobaky, G. A.; Dessouki, A. M . Thermochim. Acta. 1987, 111, 249-255.
Mucka, V.; Podlaha, J.; Silber, R. Radiat. Phys. Chem. 2000, 59, 467-475.
El-Shobaky, H. G.; Ahmed, A. S.; Radwan, N. R. N. Colloids Surf. A. 2006, 274, 138-144.
El-Shobaky, G. A.; Doheim, M. M.; Ghozza, A. M.; El-Boohy, H. A. Mater. Lett. 2002, 57, 525-531.
El-Boohy, H. A.; Doheim, M.M.; EL-Shobaky, G. A. Afinidad 2002, 59, 497-502.
Doheim, M. M.; El-Boohy, H. A.; EL-Shobaky, G. A. Adsorp. Sci. Technol. 2001, 19, 635-643.
Doheim, M. M.; Ahmed, A. S.; El-Boohy, H. A.; EL-Shobaky, G. A. J. Radioanal. Nucl. Chem. 2002, 254, 583-588.
Cordi, E. M.; O’Neill, P. J.; Falconer, J. L. Appl. Catal. B 1997, 14, 23-36.
Aboukaïs, A.; Bechara, R. ; Aïssi, C. F.; Bonnelle, J. P.; Ouqour, A.; Loukah, M.; Coudurier, G.; Vedrine, J. C. J. Chem. Soc. Faraday Trans. 1993, 89, 2545-2549.
Ahmed, A. I. Bull. Soc. Chem. Fr. 1990, 2, 179-183.
Rekoske , J. E.; Barteau, M. A. J. Catal. 1997, 165, 57-72.
Dicosimo, J. I.; Torres, G.; Apesteguia, C. R. J. Catal. 2002, 208, 114-123.
Chen, Y. Z.; Hwang, C.M.; Liaw, C. W. Appl. Catal. A 1998, 169, 207-214.
Gandia, L. M.;.Montes, M. Appl.Catal. A. 1993, 101, L1-L6.
Nicol, W.; Du Toit, E. L. Chem. Eng. Process. 2004, 43, 1539-1545.
El-Shobaky, G. A.; El-Molla, S. A.; Hammed, M. N.; Amine, N. H.; Sultan, S. N. 11th International Electronic Conference on Synthetic Organic Chemistry ECSOC-11, 1-30 November 2007; http://www. mdpi.org/ecsoc-11.htm.
El-Shobaky, G. A.; El-Molla, S. A.; Ismail, S. A. J. Radioanal. Nucl. Chem. 2004, 260, 627-636. Effects of g-Irradiation and Ageing of Surface and Catalytic Properties of Nano-sized CuO/MgO System 163
El-Shobaky, G. A.; Mokhtar, M.; Salem, A. M. Mater. Res. Bull. 2005, 40, 891-902.
El-Shobaky, G. A.; Fagal, G. A.; Petro, N.; Dessouki, A. M. Radiat. Phys. Chem. 1987, 29, 39-43.
Youssef, A.; El-Hakam, S. A.; El-Shobaky, G.A. Radiat. Phys. Chem. 1992, 40, 575-578.
El-Shobaky, G. A.; Ahmed, A.S.; Mokhtar, M. 1997, 219, 89-94.
Mucka, V. Radiat. Phys. Chem. 1996, 48, 309-313.
Mucka, V. Radiat. Phys. Chem. 1987, 30, 293-301.
Wolkenstein, Th. Adv. Catal. 1960, 12, 189-264.
Torres, G.; Apesteguia, C. R.; Dicosimo, J. I. Appl. Catal. A. 2007, 317, 161-170.
Cullity, B. D. Elements of X-Ray Diffraction, 2nd Ed, Addison-Wesley, MA, USA, 1978.
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
