| 초록 |
Porous ZnNi2O4 spherical structures built from nanoparticles were synthesized by annealing the precursor, which was synthesized via a simple template-free solvothermal route. A range of analysis techniques were employed for the characterization of the structure and morphology of as-synthesized products. The results revealed that the samples were composed of large amounts of porous ZnNi2O4 nanospheres with an average diameter around 300 nm, which were constructed by plenty of nano-sized primary particles. Moreover, gas sensor based on the as-prepared samples was fabricated and its sensing performances were investigated. It was revealed that the as-fabricated sensor device exhibited excellent selectivity toward CO at the operating temperature 150℃ and had a response of about 10 to 500 ppm CO, which was ~3 times stronger than that of sensor based on ZnNi2O4 nanoparticles. The enhanced gas sensing properties of porous ZnNi2O4 nanospheres was attributed to their unique structures. |
