Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (12): 1990-1996.DOI: 10.1016/S1872-2067(14)60190-X

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Catalytic activity of palladium nanoparticles immobilized on an amino-functionalized ceramic membrane support

Hong Jianga, Xiaoxu Suna, Yan Dub, Rizhi Chena, Weihong Xinga   

  1. a. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;
    b. College of Environment, Nanjing Tech University, Nanjing 210009, Jiangsu, China
  • Received:2014-05-22 Revised:2014-07-03 Online:2014-11-29 Published:2014-11-29
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21106061, 21125629) and the Natural Science Foundation of Jiangsu Province (BK20130920).

Abstract:

Pd nanoparticles were immobilized on a tubular ceramic membrane support. The support surface was functionalized by N-(β-aminoethyl)-γ-aminopropyl trimethoxy silane (AAPTS), which contains two amino groups. The Pd-immobilized ceramic membrane support was characterized by X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma emission spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. Its catalytic properties were investigated by the liquid phase hydrogenation of p-nitrophenol to p-aminophenol. The Pd-immobilized ceramic membrane support was compared with the Pd nanoparticles immobilized on a similar support functionalized by γ-amino-propyltriethoxy silane (3-APTS), which contains one amino group. Higher catalytic activity and stability were observed for the AAPTS-functionalized support. AAPTS contains twice as many amino groups as 3-APTS, and consequently exhibited a stronger electron-donating effect toward Pd. The AAPTS-functionalized ceramic membrane support contained more immobilized Pd nanoparticles, which were bound more strongly. This led to a higher catalytic activity and stability.

Key words: Palladium nanoparticle, N-(β-aminoethyl)-γ-aminopropyl trimethoxy silane, Ceramic membrane, p-Nitrophenol hydrogenation