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Journal of Nanoparticle Research

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01-06-2010 | Research Paper

Gas sensing properties of MoO₃ nanoparticles synthesized by solvothermal method

Authors: Won-Sik Kim, Hong-Chan Kim, Seong-Hyeon Hong

Published in: Journal of Nanoparticle Research | Issue 5/2010

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Abstract

MoO₃ nanoparticles were prepared by thermally oxidizing the MoO₂ nano-crystallites synthesized by solvothermal reaction, and their gas sensing properties were investigated. Ethanol and water mixed solvents were used in the solvothermal synthesis, and it was observed that the phase, size, and morphology of the products were strongly dependent on the composition of solvents. Well-crystallized and spherical MoO₂ nano-crystallites (~20 nm) were obtained in the mixed solvent (water:ethanol = 40:10 in vol), and subsequent heat treatment at 450 °C produced the well-separated, slightly elongated MoO₃ nano-particles of ~100 nm. The nano-particle MoO₃ gas sensor responded to both oxidizing and reducing gases, but it exhibited the extremely high gas response toward H₂S with a short response time (<10 s). In particular, the magnitude of gas response of nano-particle MoO₃ gas sensor was about 10 times higher than that of micron-sized commercial MoO₃ powder sensor at 20 ppm H₂S.

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Title: Gas sensing properties of MoO3 nanoparticles synthesized by solvothermal method
Authors: Won-Sik Kim
Hong-Chan Kim
Seong-Hyeon Hong
Publication date: 01-06-2010
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 5/2010
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-009-9751-6

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