Influence of Support on Catalytic Activity of Nano-Ni Catalysts in P-nitrophenol Reduction to P-aminophenol | ||||
| Egyptian Journal of Chemistry | ||||
| Article 4, Volume 57, Issue 1, February 2014, Page 45-58 PDF (636.33 K) | ||||
| DOI: 10.21608/ejchem.2014.1031 | ||||
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| Abstract | ||||
| THE CATALYTIC activities of CaCO3-, TiO2-, Al2O3 - and SiO2- ….. supported Ni catalysts in reduction of p-nitrophenol to p-aminophenol were investigated. The catalysts were prepared by impregnation using a solution of appropriate concentrations of NiCl2 in order to obtain catalysts with 2.5, 5 and 10% nickel. The dried solids were treated with hydrazine hydrate to reduce nickel ions to metallic nickel, on which the reduction of p-nitrophenol takes place. The catalysts were characterized by XRD and SEM before and after conducting the reduction reaction of p-nitrophenol .The results showed that all catalysts contain crystalline nano nickel. The catalysts were active in reduction of p-nitrophenol into p-aminophenol. The activity was in the following order: Ni/ TiO2 > Ni/ CaCO3 > Ni/ SiO2> Ni/ Al2O3, i.e. the activity was decreased with increasing the acidity of the supports. | ||||
| Keywords | ||||
| p-nitrophenol; p-Aminophenol; Catalytic reduction; Nano-sized nickel; Hydrazine hydrate and Supports | ||||
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