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Received August 23, 2023
Accepted August 23, 2023
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Preparation of well-dispersed and anti-oxidized Ni nanoparticles using polyamioloamine dendrimers as templates and their catalytic activity in the hydrogenation of p-nitrophenol to p-aminophenol
1College of Chemistry and Material Science, Nanjing Normal University, Nanjing, Jiangsu 210097, China 2State Key Laboratory of Materials-Oriented Chemical Engineering; College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
Korean Journal of Chemical Engineering, March 2011, 28(3), 717-722(6), 10.1007/s11814-010-0424-z
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Abstract
p-Aminophenol was synthesized by catalytic hydrogenation of p-nitrophenol on Ni nanoparticles prepared by a chemical reduction method using polyamidoamine (PAMAM) dendrimers as templates. The as-prepared Ni nanoparticles were characterized by XRD, LRS, EDS, FTIR, FESEM, HRTEM and N2 sorption analysis. Smaller-sized, better-dispersed and more active Ni nanoparticles can be successfully achieved using PAMAM dendrimers as templates. Analysis results show the as-prepared Ni nanoparticles are pure f.c.c. nickel. In hydrogenation reactions of p-nitrophenol, Ni nanoparticles show higher catalytic activity than that of Ni nanoparticles prepared in the absence of PAMAM dendrimers. The weight ratio of PAMAM/Ni2+ is proved to be an important parameter on the catalytic activity of Ni nanoparticles and the optimal ratio is 15%. The reason proposed for higher catalytic activity of Ni nanoparticles is a combination effect of smaller particle size, better dispersion and more active Ni nanoparticles.
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Knecht MR, Garcia-Martinez JC, Crooks RM, Langmuir, 21(25), 11981 (2005)
Reynhardt JPK, Yang Y, Sayari A, Alper H, Chem. Mater., 16, 4095 (2004)
Hendricks TR, Dams EE, Wensing ST, Lee I, Langmuir, 23(13), 7404 (2007)
Rar A, Zhou JN, Liu WJ, Barnard JA, Bennett A, Street SC, Appl. Surf. Sci., 175, 134 (2001)
Knecht MR, Garcia-Martinez JC, Crooks RM, Chem. Mater., 18, 5039 (2006)
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