Abstract

Abstract One of the most important issues in the development of gas sensors for monitoring gaseous pollutants, such as ozone (O3) and nitrogen dioxide (NO2), is the fabrication of sensor arrays that possess different responses for recognizing patterns of different analytes. Here, we develop a chemiresistive sensor array with a tailoring response by using Zn2+ doping tailored molybdenum disulfide (MoS2). Compared with the sensor of pure MoS2, the responses of the sensor of MoS2 with 5% Zn2+ toward five analytes, including O3 and NO2, are improved by more than 160%, indicating that Zn2+ doping successfully tailor the sensing performances of MoS2 matrix. Thus, this will be a promising approach to constructing a versatile sensor array, by doping a wide variety of metallic ions and tailoring the doping amounts in the MoS2 matrix. Furthermore, the sensor of MoS2 with 5% Zn2+ exhibits the detection limits of 17 and 215 ppb for O3 and NO2, respectively. The sensor array can identify O3, NO2 and other analytes within 14 s in the real-world detection. This approach to fabricating a tunable and discriminative sensor array may lead to a valuable real-world application for the continuous and low-cost monitoring of gaseous pollutants.

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