Low temperature operating In2−xNixO3 sensors with high response and good selectivity for NO2 gas

• Published in: Journal of alloys and compounds Vol. 581; pp. 653 - 658
• Main Authors: Chen, Yu, Zhu, Linghui, Feng, Caihui, Liu, Juan, Li, Chao, Wen, Shanpeng, Ruan, Shengping
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25.12.2013; Elsevier
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Gas sensing; In2−xNixO3; Low temperature; Materials science; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Physics; Stable solid solution; Stable solid solution; In2−xNixO3; Gas sensing; Low temperature; Impurity density; In; Electrospinning; Nanofiber; Selectivity; Nickel additions; O; Solid state; Solid solutions; Ni; Nitrogen dioxide; Gas sensors; Nanostructured materials; Gas detector
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.07.168

•Stable solid-state solution electrospun In2−xNixO3 nanofibers were fabricated.•Ni-doping improves the NO2 sensing performance of In2O3 nanofibers greatly.•In2−xNixO3 sensor with 6(mol)% Ni-doping concentration exhibits the highest response among all samples.•High response against low concentration down to ppb level of NO2 are observed at 90°C.•The In2−xNixO3 sensor exhibits excellent selectivity. Pure In2O3 and solid state solution In2−xNixO3 nanofibers with different Ni-doping concentration were prepared via electrospinning method. Sensor based on In2−xNixO3 nanofibers with 6(mol)% Ni-doping concentration exhibited the highest response, good selectivity and low detectable concentration limit down to ppb levels of NO2 at a relatively low temperature of 90°C. These properties make the In2−xNixO3 nanofibers good candidates for NO2 detection.