Issue 8, 1994

Improvement of copper oxide–tin oxide sensor for dilute hydrogen sulfide

Abstract

The influence of the loading and dispersion of CuO on the H2S-sensing properties of CuO–SnO2 sensors has been investigated. The response rates to H2S depend on various factors such as CuO loading, specific surface area (or size) of SnO2 grains, method of loading the SnO2 grains with CuO and the operating temperature. For the CuO–SnO2 sensor prepared by a chemical fixation method, the response rates to dilute H2S (1–10 ppm) increased with decreasing CuO loading, while the sensitivity to H2S decreased monotonically with decreasing amount of CuO dispersed per unit surface area of SnO2. By optimizing these factors, it was possible to obtain a CuO–SnO2 sensor which responded to H2S above 1 ppm at 160 °C with sufficient sensitivity and fairly good response kinetics.

Article information

Article type
Paper

J. Mater. Chem., 1994,4, 1259-1262

Improvement of copper oxide–tin oxide sensor for dilute hydrogen sulfide

T. Maekawa, J. Tamaki, N. Miura and N. Yamazoe, J. Mater. Chem., 1994, 4, 1259 DOI: 10.1039/JM9940401259

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