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Gas sensing with nano-indium oxides (In2O3) prepared via continuous hydrothermal flow synthesis.

Elouali, S; Bloor, LG; Binions, R; Parkin, IP; Carmalt, CJ; Darr, JA; (2012) Gas sensing with nano-indium oxides (In2O3) prepared via continuous hydrothermal flow synthesis. Langmuir , 28 (3) 1879 - 1885. 10.1021/la203565h.

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Abstract

A rapid, clean, and continuous hydrothermal route to the synthesis of ca. 14 nm indium oxide (In(2)O(3)) nanoparticles using a superheated water flow at 400 °C and 24.1 MPa as a crystallizing medium and reagent is described. Powder X-ray diffraction (XRD) of the particles revealed that they were highly crystalline despite their very short time under hydrothermal flow conditions. Gas sensing substrates were prepared from an In(2)O(3) suspension via drop-coating, and their gas sensing properties were tested for response to butane, ethanol, CO, ammonia, and NO(2) gases. The sensors showed excellent selectivity toward ethanol, giving a response of 18-20 ppm.

Type:Article
Title:Gas sensing with nano-indium oxides (In2O3) prepared via continuous hydrothermal flow synthesis.
Location:United States
DOI:10.1021/la203565h
Language:English
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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