An in situ detector/conductor strategy to construct hollow MoO3/MoO2 nanoreactor for aniline detection

It is still a challenge to develop sensing materials towards rapidly and sensitively detecting aniline at 5 ppm. Herein, an in situ detector/conductor strategy is reported to design of double-layered MoO3/MoO2 nano reactors for superior aniline detection. Hollow MoO2 microspheres were prepared and subsequently applied to produce MoO3/MoO2 via an in situ oxidation procedure. The dynamic transformation was monitored by operando XRD device. Metallic MoO2 substrates act as the conductor to improve the electroconductivity, and the semiconductive MoO3 play the role of the detector to sense the toxic gas. As a result, the response of the optimized MoO3/MoO2-3 sensor was 14.7 to 5 ppm aniline at 200 degrees C, and the recover and recover time were only 16 and 21 s. The response was much higher than other results reported by far. Density functional theory results revealed that the band structures and adsorption energies of MoO3 to aniline molecules can be modulated via introducing MoO2.

Automated summary

An in situ detector/conductor strategy was reported for the design of double-layered MoO3/MoO2 nano reactors for superior aniline detection. The response of the optimized sensor was significantly higher than other reported results, with a quick recovery time.