Abstract
In this paper, Sn-doped nanoporous anatase TiO2 nanoparticles were prepared via a hydrothermal method without surfactant or template modification. Various techniques were used to analyze the structure, morphology and specific surface area of the as-synthesized samples. The sensor responses for volatile organic compounds (acetone, ethanol, n-butanol and xylene) at the various concentrations under the different operating temperatures were studied. Under the operating temperature of 240 °C, the sensor has good response, linear correlation, repeatability and long-term stability. In particular, the 2.5% Sn/TiO2 nanoparticles show a high gas response with the highest response to 100 ppm VOCs (21.19). These values demonstrate the potential application of 2.5% Sn/TiO2 nanoparticles for VOCs detection. In addition, the mechanism related to advanced performance was studied and proposed.
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