Water-soluble polyaniline （PANI）, prepared by chemical-oxide and SmBaCuMO5＋δ（M=Fe, Co, Ni）（SBCM） powders, pre-pared by sol-gel method were analyzed through Fourier transform infrared spectroscopy （FT-IR） spe...Water-soluble polyaniline （PANI）, prepared by chemical-oxide and SmBaCuMO5＋δ（M=Fe, Co, Ni）（SBCM） powders, pre-pared by sol-gel method were analyzed through Fourier transform infrared spectroscopy （FT-IR） spectra, X-ray diffraction （XRD）, transmission electron microscopy （TEM） and energy dispersive spectroscopy （EDS） respectively, so as to investigate the gas sensi-tivities of PANI/SmBaCuFeO5＋δ（SBCF） and its sensitivity to NH3 under room temperature. The results showed that all of SBCM powders were of double-perovskite structure and PANI was successfully obtained. Under the same condition, the gas sensor based on PANI/SmBaCuFeO5＋δ（SBCF） material exhibited higher resistance sensitivity, better selectivity and shorter response-recovery time than others. The resistance sensitivities to NH3 increased with the increasing of atom radius of M in PANI/SBCM.展开更多
基金Project supported by National Natural Science Foundation of China(21264015)
文摘Water-soluble polyaniline （PANI）, prepared by chemical-oxide and SmBaCuMO5＋δ（M=Fe, Co, Ni）（SBCM） powders, pre-pared by sol-gel method were analyzed through Fourier transform infrared spectroscopy （FT-IR） spectra, X-ray diffraction （XRD）, transmission electron microscopy （TEM） and energy dispersive spectroscopy （EDS） respectively, so as to investigate the gas sensi-tivities of PANI/SmBaCuFeO5＋δ（SBCF） and its sensitivity to NH3 under room temperature. The results showed that all of SBCM powders were of double-perovskite structure and PANI was successfully obtained. Under the same condition, the gas sensor based on PANI/SmBaCuFeO5＋δ（SBCF） material exhibited higher resistance sensitivity, better selectivity and shorter response-recovery time than others. The resistance sensitivities to NH3 increased with the increasing of atom radius of M in PANI/SBCM.
