摘要
With the Nd_2O_3, Fe(NO_3)_3·9H_2O, nitric acid(1∶1 vloume fraction) for the starting materials, rare earth composite oxide NdFeO_3 with the structure of perovskite type was synthesized by sol-gel method in the system of citric acid. Structural characteristics were characterized by XRD and TEM which indicate that the sample is nanocrystallite with uniform grain size distribution and the average grain size is about 28 nm. Moreover, the gas sensing properties of the material were tested. The results show that NdFeO_3 sensors have high sensitivity, excellent selectivity and quick response and recovery behavior to H_2S, hence, this gas sensing material has a better prospects in industrial practice.
With the Nd_2O_3, Fe(NO_3)_3·9H_2O, nitric acid(1∶1 vloume fraction) for the starting materials, rare earth composite oxide NdFeO_3 with the structure of perovskite type was synthesized by sol-gel method in the system of citric acid. Structural characteristics were characterized by XRD and TEM which indicate that the sample is nanocrystallite with uniform grain size distribution and the average grain size is about 28 nm. Moreover, the gas sensing properties of the material were tested. The results show that NdFeO_3 sensors have high sensitivity, excellent selectivity and quick response and recovery behavior to H_2S, hence, this gas sensing material has a better prospects in industrial practice.
基金
ProjectsupportedbytheNaturalScienceFoundationofHenanProvince (0 0 40 3 0 3 0 0 )andtheNaturalScienceFoundationofHenanEducationalCommittee (2 0 0 2 15 0 0 0 0 7)
