XPS and TPR study of sol-gel derived M/TiO2 powders (M=Co, Cu, Mn, Ni)
in English

I.S. Petrik, G.V. Krylova, О.O. Kelyp, L.V. Lutsenko, N.P. Smirnova, L.P. Oleksenko
2015 Himia Fizika ta Tehnologia Poverhni  
Produced by templated sol-gel method mesoporous nanosized titania powders modified with 3d-metal ions have been characterized by XPS and TPR methods. Metal species formed on the titania surface were investigated. The TPR analysis showed that reduction behaviors of the M n+ /TiO 2 were strongly affected by the synthesis method, preparation conditions and interactions between the dopant metal and TiO 2 matrix. It was found that Ti-O-M-bonds formation during sol-gel synthesis with applying
more » ... triblock copolymer Pluronic P123 as organic template and calcination at 550 °C promoted high-dispersion states of doped 5 % metals. The XPS and TPR showing dopants exist as divalent and trivalent ions for M n+ /TiO 2 , where M=Co, Ni, Mn, and as monovalent and divalent ions in the case of Cu/TiO 2 .
doi:10.15407/hftp06.02.179 fatcat:cdppjpsa45hdjdzm7tmeihpeam