Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

• Published in: Metals and materials international Vol. 21; no. 2; pp. 415 - 421
• Main Authors: Kim, Sang Sub, Na, Han Gil, Kwon, Yong Jung, Cho, Hong Yeon, Kim, Hyoun Woo
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.03.2015; 대한금속·재료학회
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Engineering Thermodynamics; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Processes; Solid Mechanics; 재료공학; chemical synthesis; X-ray diffraction; transmission electron microscopy; nanostructured materials; Sb; O
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-015-4264-6

The sensing properties of Sb 2 O 5 nanowires are reported for the first time. By varying the heating temperature of a mixture of Sb and Bi powders, we have successfully prepared Sb 2 O 5 nanowires. For nanowires grown at 600°C, the stem is mainly comprised of a monoclinic Sb 2 O 5 phase, with a trace amount of a monoclinic Bi 2 O 3 phase. The existence of Au nanoparticles at the tips suggests that the 600°C-synthesized nanowires are mainly grown via a vapor-liquid-solid process. The 500°C-grown products comprise a small amount of 1D nanostructures, whereas the 700°C-grown product does not exhibit sufficiently thin 1D nanostructures. A representative A survey XPS spectrum exhibits several peaks, including Sb 3p, Sb 3d, O 1s, C 1s, Bi 4f, and Sb 4d. At room temeperature, the sensor response, response time, and recovery time of the nanowires were measured to be 1.20, 2104 s, and 6579 s, respectively. Sensor measurements employing NO 2 gas indicate that the Sb 2 O 5 nanowires synthesized in this work have potential for use as a room-temperature NO 2 chemical gas sensors.