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Korean Journal of Chemical Engineering, Vol.28, No.3, 717-722, 2011
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
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.
[References]
- Chaudhari RV, Divekar SS, Vaidya MJ and Rode CV, Single step process for the preparation of p-aminophenol, US6028227, US, 2000
- Lee LT, Chen MH and Yao CN, Process for manufacturing paminophenol, US4885389, US, 1998
- Rode CV, Vaidya MJ, Jaganathan R, Chaudhari RV, Chem. Eng. Sci., 56(4), 1299, 2001
- Vaidya MJ, Kulkarni SM, Chaudhari RV, Org. Process Res.Dev., 7, 202, 2003
- Chen RZ, Du Y, Chen CL, Xing WH, Xu NP, Chen CX, Zhang ZL, J. Chem. Ind. Eng. (Chinese)., 54, 704, 2003
- Du Y, Chen HL, Chen RZ, Xu NP, Appl. Catal. A: Gen., 277(1-2), 259, 2004
- Du Y, Chen HL, Chen RZ, Xu NP, Chem. Eng. J., 125(1), 9, 2006
- Chen RZ, Wang QQ, Du Y, Xing WH, Xu NP, Chem. Eng. J., 145(3), 371, 2009
- Lu HH, Yin HB, Liu YM, Jiang TS, Yu LB, Catal. Commun., 10, 313, 2008
- Ma ZY, Zhang LX, Chen RZ, Xing WH, Xu NP, Chem. Eng. J., 138(1-3), 517, 2008
- Zheng HG, Liang JH, Zeng JH, Qian YT, Mater. Res. Bull., 36(5-6), 947, 2001
- Nandi A, Gupta MD, Banthia AK, Mater. Lett., 52, 203, 2002
- Houa Y, Gao S, J. Mater. Chem., 13, 1510, 2003
- Yu K, Kim DJ, Chung HS, Liang H, Mater. Lett., 57, 3992, 2003
- Wang AL, Yin HB, Lu HH, Xue JJ, Ren M, Jiang TS, Langmuir, 25(21), 12736, 2009
- Esfand R, Tomalia DA, Drug Discovery Today., 6, 427, 2001
- Stiriba SE, Frey H, Haag R, Angew. Chem. Int. Ed., 41, 1329, 2002
- Auten BJ, Hahn BP, Vijayaraghavan G, Stevenson KJ, Chandler BD, J. Phys. Chem. C., 112, 5365, 2008
- Jiang YJ, Gao QM, J. Am. Chem. Soc., 128(3), 716, 2006
- 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
- Tomalia DA, Baker H, Dewald JR, Hall MJ, Kallos G, Martin SJ, Roeck J, Ryder J, Smith P, Polym. J. (Japan)., 17, 117, 1985
- Desilvestro J, Corrigan DA, J. Electrochem. Soc., 135, 885, 1988
- Liu ZL, Wang XD, Wu HY, Li CX, J. Colloid Interface Sci., 287(2), 604, 2005
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