Ni–Al bimetallic catalysts for preparation of multiwalled carbon nanotubes from polypropylene Influence of the ratio of NiAl》.pdfVIP

Applied Catalysis B: Environmental 181 (2016) 769–778 Contents lists available at ScienceDirect Applied Catalysis B: Environmental j o u r na l h o m e p ag e: w w w. elsev /locate/apc atb Ni–Al bimetallic catalysts for preparation of multiwalled carbon nanotubes from polypropylene: Influence of the ratio of Ni/Al Yinlong Shen, Weiguang Gong ∗ , Baicun Zheng ∗ , Lei Gao Research Development Centerfor Sports Materials, East China University of Science and Technology, Shanghai 200237, PR China a r t i c l e i n f o a b s t r a c t Article history: This study designed a novel Ni–Al bimetallic catalyst for preparation of multiwalled carbon nanotubes Received 9 June 2015 (MWCNTs) from polypropylene (PP). The study further investigated the influence of Al content on the cat- Received in revised form 24 August 2015 alytic activity of Ni catalyst. A series of bimetallic Ni–Al catalysts were prepared and then characterized by Accepted 30 August 2015 X-ray diffraction, N -adsorption–desorption isotherms, transmission electron microcopy and tempera- 2 Available online 1 September 2015 ture programmed reduction analysis. It was found that bimetallic Ni–Al catalysts had higher surface area, higher reduction temperature, smaller Ni particle size and improved stability. Consequently, the addition Keywords: of Al not only dramatically