Synthesis, characterization, thermal and gas sensing properties of newscandium(III) nano coordination polymers

New Scandium(III) coordination polymer at bulk and nanopowders as Scandium ۱,۴-benzenedicarboxylic acid hydroxide [Sc(OH)(BDCA)]n, (BDCA = ۱,۴-Benzene Dicarboxylic Acid) hasbeen synthesized by the reaction of a mixture Sc(III) Nitrate and BDCA in MeOH by simpleBranched tube and sonochemical method. The nanopowders of Sc۲O۳ was prepared from thecalcinations of the NCP at air atmosphere. The structure of the CP and NCP (CP = CoordinationPolymers and NCP = Nano Coordination Polymers) were determined by X-ray crystallography,while nano-structural materials were characterized by X-ray powder diffraction (XRPD), ThermalGravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). These NCP and Sc۲O۳nanostructures have been tested for CO۲ gas monitoring by depositing them as thick films on aninterdigitated alumina substrate and evaluating the surface resistance of the deposited layer as afunction of operating temperature and CO۲ concentrations. The gas sensitivity tests havedemonstrated that the Sc۲O۳ nanopowders, exhibit high sensitivity to CO۲ proving theirapplicability in gas sensors. The role of the nanopowdesr on the sensing properties of NCP andSc۲O۳ are also discussed [۱-۲].

کلیدواژه ها:

Coordination Polymers ، Sc۲O۳ ، Nanopowders ، CO۲ ، gas sensing.