Abstract
Cr-doped SnO2 materials were synthesized by a facile hydrothermal method and their gas-sensing properties were studied. The characterization results show that as-prepared materials consist of SnO2 microrods and nanoparticles (NPs) that were adhered on the surface of microrods. The sensing test results indicate that the 5 mol% Cr-doped SnO2 exhibits the enhanced response and high selectivity to triethylamine (TEA), and the response to 100 ppm TEA increased four times. The response time is only 1 s. Notably, a good stability is maintained under surroundings with fluctuating humidity at lower operating temperature, implying that Cr-doped SnO2 can be served as a sensor platform for TEA detection.
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