Characteristics of polyaniline cobalt supported catalysts for epoxidation reactions.
A study of polyaniline (PANI) doping with various cobalt compounds, that is, cobalt(II) chloride, cobalt(II) acetate, and cobalt(II) salen, is presented. The catalysts were prepared by depositing cobalt compounds onto the polymer surface. PANI powders containing cobalt ions were obtained by one- or two-step method suspending PANI in the following acetonitrile/acetic acid solution or acetonitrile and then acetic acid solution. Moreover different ratios of Co(II) : PANI were studied. Catalysts obtained with both methods and at all ratios were investigated using various techniques including AAS and XPS spectroscopy. The optimum conditions for preparation of PANI/Co catalysts were established. Catalytic activity of polyaniline cobalt(II) supported catalysts was tested in dec-1-ene epoxidation with molecular oxygen at room temperature. The relationship between the amount of cobalt species, measured with both AAS and XPS techniques, and the activity of PANI-Co catalysts has been established.
Faculty of Food Technology, University of Agriculture in Krakow, Balicka 122, 30-149 Kraków, Poland.
Grzegorz
G
Kowalski
Department of Polymer Science and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
Jan
J
Pielichowski
Institute of Chemical Engineering, Polish Academy of Science, ul. Bałtycka 5, 44-100 Gliwice, Poland.
Mirosław
M
Grzesik
D000814:Aniline Compounds / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004852:Epoxy Compounds / Q000737:chemistry*; D013696:Temperature
D000814:Aniline Compounds; D004852:Epoxy Compounds; C416807:polyaniline; D003035:Cobalt