Hydrogen sensing properties and mechanism of NiO-Nb2O5 composite nanoparticle-based electrical gas sensors

作者：Mirzaei Ali; Sun Gun Joo; Lee Jae Kyung; Lee Chongmu^*; Choi Seungbok^*; Kim Hyoun Woo

来源：Ceramics International, 2017, 43(6): 5247-5254.

DOI：10.1016/j.ceramint.2017.01.050

• Sensors
• Nanocomposites
• Oxide semiconductors
• Sol-gel processes

A simple hydrothermal method was used to prepare NiO-Nb2O5 composite nanoparticle electrical sensors for the detection of hydrogen (H-2) at room temperature. To investigate the morphology and crystal structure of the synthesized powders, the synthesized nanoparticles were characterized by scanning electron microscopy and X-ray diffraction. The NiO-Nb2O5 composite nanoparticle sensor showed stronger and faster response to H-2 than the pristine Nb2O5 one at room temperature. Only weak responses were observed to carbon monoxide, methane and ethanol, indicating that the NiO-Nb2O5 composite nanoparticle sensor could be a potential candidate as a practical gas detector. In this study, the H-2 sensing properties and mechanism of NiO-Nb2O5 composite nanoparticle-based electrical gas sensors are discussed in detail.

• 出版日期2017-4-15