<span style="font-size:12.0pt;font-family:"Calibri","sans-serif"; mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Calibri;mso-fareast-theme-font: minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-IN;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">Catalytic behaviour of CuO/ Al₂O₃ catalysts for the decomposition of 2-propanol</span>

819-822Copper oxide supported on alumina is used as catalyst for the decomposition of 2-<span style="font-size:12.0pt;font-family:HiddenHorzOCR; mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: HiddenHorzOCR;mso-ansi-language:EN-IN;mso-fareast-language:EN-US;mso-bidi-language: AR-SA">propanol using microcatalytic pulse technique in the temperature range 280-360°C. The magnetic moments of Al2O3 catalysts show the dependence of their magnetic properties on the copper content and the calcination temperature. The results show that dehydrogenation and dehydration activities are observed on these samples. The acid sites represent the active fraction of the surface on which dehydration proceeds whereas CuO site is the one used for dehydrogenation. The total activity (dehydrogenation and dehydration) is described using BassettHabgood's kinetics, where the rate-controlling step is the surface reaction. The mechanism of dehydrogenation and dehydration of 2-propanol on the investigated samples is also discussed.</span

Structural and textural properties of some supported nickel catalysts

1046- 1051Nickel/alumina, nickel/alumina-chromia and nickel/chromia supported catalysts have been prepared by impregnation method. The DTA and X-ray techniques have been used to investigate the influence of the support on the formation of the active phase. It is found that alumina, alumina-chromia and chromia affect the formation of nickel oxide and/or nickel metal. The surface areas and pore structures have been determined using low temperature nitrogen adsorption technique. The results indicate that the addition of nickel to alumina, alumina-chromia and chromia changes the textural properties of the supports. Nickel promotes both activation and sintering of the supports

A facile co-precipitation synthesis of heterostructured ZrO2|ZnO nanoparticles as efficient photocatalysts for wastewater treatment

Gnm3Altres ajuts: Basque Government ELKARTEK, FN KK-2015/0010ZrO₂-decorated ZnO (ZrO₂/ZnO) nanoparticles (NPs) have been synthesized by a facile co-precipitation method in the presence of cetyltrimethylammonium bromide (CTAB) surfactant. The ZrO₂ amount in the NPs has been varied from 1.0, 2.0, 4.9, to 9.3% by weight. The resulting NPs are heterostructured and consist of a crystalline ZnO core (wurtzite phase) surrounded by an amorphous ZrO₂ layer. X-ray diffraction analyses support this observation. The NPs show a narrow size distribution and are slightly elongated. Compared to pure ZnO NPs, the hybrid ZrO₂/ZnO ones show enhanced photocatalytic activity toward the degradation of Rhodamine B under UV-Vis light. Such enhancement has been partly attributed to the increased amount of oxygen vacancies when ZrO₂ is incorporated into the NPs, as shown by X-ray photoelectron spectroscopy analyses