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Qi Zhang et al.
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Wenjun Wang et al.
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Summary: Driven by environmental degradation, the gas sensor constructed with metal oxide semi-conductor (MOS) has rapidly developed due to its suitability for monitoring different hazardous gases. This paper presents a CdS-ZnO n-n heterojunction approach to enhance the sensing performance of ZnO for triethylamine (TEA). Compared to the pure ZnO sensor, the hybrid CdS/ZnO sensor exhibits significant improvements in TEA sensing performance, including lower operating temperature (reduced from 200 to 160 degrees C), higher sensitivity (0.214/ppm vs 0.068/ppm to 1-200 ppm TEA), better selectivity, and faster response speed.
Review
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Hongyin Pan et al.
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G. Greczynski et al.
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Pengfei Cheng et al.
Summary: In this study, hierarchical flower-like Ni-doped Co3O4 was successfully synthesized using a facile method, and the effect of ethanol/water ratio on samples was investigated. Gas sensors based on the prepared materials showed excellent performance, with the sensor using 5.3 mol% Ni-doped Co3O4 microflowers exhibiting the highest response towards n-butanol, as well as outstanding anti-humidity properties and long-term stability. The improved gas sensing properties were attributed to the unique hierarchical flower-like microstructure and optimized parameters resulting from the Ni doping.
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Jiabin Shen et al.
Summary: In this study, a new metal oxide semiconductor gas sensor based on bimetal Au@Pt-modified alpha-Fe2O3 hollow nanocubes was developed for detecting trimethylamine gas. The sensor exhibited faster response time and higher response compared to conventional sensors, and showed promising application prospects in estimating seafood freshness on the spot. The high performance was attributed to the specific hollow morphology with high specific surface area and the synergistic effect of the bimetal Au@Pt.
ACS APPLIED MATERIALS & INTERFACES
(2021)
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Miao Liu et al.
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