Effect of preparation method, loading of Co3O4 and calcination temperature on the physicochemical and catalytic properties of Co3O4/ZnO nanomaterials
El -Mona, SA; Laila I. Ali; Mahmoud, HR; Ibrahim, MM; Naghmash, MA;
Abstract
ZnO nanomaterials (ZnOT, ZnOS and ZnOP) were successfully synthesized by thermal decomposition, sol–gel auto combustion and precipitation methods, respectively. Co3O4/ZnO catalysts were synthesized by impregnation method, nominated as CoZnOT, CoZnOS and CoZnOP respectively. The as-prepared catalysts were characterized by XRD, N2 adsorption–desorption isotherms, HR-TEM and FT-IR techniques. The SBET of CoZnO nanomaterials were significantly higher than those of the pure oxides. Further, the Co3O4/ZnO sample in which ZnO synthesized via sol–gel combustion using citric acid (CoZnOSCI) showed the largest surface area while CoZnOP sample showed the smallest value. The HR-TEM images showed that addition of Co3O4 to ZnO catalyst and the calcination temperature affected the morphology. The catalytic decomposition of H2O2 of the Co3O4/ZnO catalysts is higher than that of the pure oxides. The most catalytically active sample is Co3O4/ZnO in which ZnO synthesized via thermal decomposition of zinc carbonate (CoZnOTC) while CoZnOSCI catalyst being the less active one.
Other data
Title | Effect of preparation method, loading of Co3O4 and calcination temperature on the physicochemical and catalytic properties of Co3O4/ZnO nanomaterials | Authors | El -Mona, SA; Laila I. Ali ; Mahmoud, HR; Ibrahim, MM; Naghmash, MA | Keywords | Nanostructures; Heat treatment; Precipitation; Sol-gel growth; Surface properties; HYDROGEN-PEROXIDE; ZNO NANOPARTICLES; OPTICAL-PROPERTIES; TRANSITION-METAL; OXIDE; CO; SURFACE; NANOSTRUCTURES; DECOMPOSITION; NANOCRYSTALS | Issue Date | 2017 | Publisher | ELSEVIER SCIENCE SA | Journal | J. Materials Chemistry and Physics | ISSN | 0254-0584 | DOI | 10.1016/j.matchemphys.2016.10.003 | Scopus ID | 2-s2.0-84992150909 | Web of science ID | WOS:000389097000007 |
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