Abstract

Nickel oxide (NiO) nanostructures were synthesized by sonocatalyzed microwave irradiation technique, followed by calcination process. Electron microscopic images of NiO powder calcined at 500 °C revealed coexistence of nanorods and spherical nanoparticles. The NiO powders calcined at 600 and 700 °C composed of spherical nanoparticles, where a larger particle size was observed for the powder calcined at 700 °C. The acetone sensor response of the fabricated NiO sensors revealed that shape and size of the NiO particles affected the response. The response increased with increasing acetone gas concentration, which reached a maximum value at the operating temperature of 325 °C.

摘要

通过声催化微波辐射技术合成了氧化镍（NiO）纳米结构，然后进行了煅烧工艺。在500°C下煅烧的NiO粉末的电子显微镜图像显示，纳米棒和球形纳米颗粒共存。在600和700°C下煅烧的NiO粉末由球形纳米颗粒组成，在700°C煅烧的粉末中观察到较大的粒径。制成的NiO传感器的丙酮传感器响应表明，NiO颗粒的形状和大小会影响响应。响应随着丙酮气体浓度的增加而增加，该浓度在325°C的工作温度下达到最大值。