Dehydrogenation of propane over sugar foams templated Ga2O3 nanoparticles catalysts

摘要

Highly active Ga2O3 nanoparticles catalysts were prepared by one-step oxidative decomposition of gallium nitrate with sucrose-derived carbon foams (SCF) template. The catalysts were investigated by XRD, Ar physisorption, SEM-EDS, HRTEM, TGA, NH3-TPD and (71) Ga MAS NMR. The addition of sucrose facilitated the higher surface area of Ga2O3 nanoparticles and morphological transformation from bulk to flake due to the structure-directing role of the sucrose solution. Moreover, the weak-medium surface acid sites increased by adding sucrose properly, which was related to the larger number of tetrahedral Ga3+ cations. The optimum catalytic activity was achieved over SXCF-Ga2O3 catalysts at the sucrose/Ga2O3 molar ratio of 6 with the propane conversion of 46.63% and propene selectivity of 88.18%.