Sensitive and selective room temperature H2S gas sensor based on Au sensitized vertical ZnO nanorods with flower-like structures

A fast response & recovery H2S gas sensor based on α-Fe2O3 nanoparticles with ppb level detection limit

“…The resistance 12 Results and discussion undergoed a dramatic decrease upon the injection of H 2 S gas and almost recovered to its initial value when the H 2 S flow was switched off, indicating a good reversibility the sensor possesses. In addition, the response time and recovery time were determined to be 30 s and 5 s, respectively.…”

“…For these reasons, they have been widely investigated. Especially, with the recent development of nanoscience and nanotechnology, a large number of nanostructured metal oxide semiconductors were developed for gas sensing application, such as In 2 O 3 [10], ZnO [11,12] received much research attention due to its high resistance to corrosion, abundant raw material and non-toxicity.…”

ZnO Quasi-1D Nanostructures: Synthesis, Modeling, and Properties for Applications in Conductometric Chemical Sensors

“…Au nanoparticles with uniform dispersion can be loaded using Chloroauric acid (HAuCl 4 ) as the precursor [43,44]. Direct current (DC) sputtering is another technique for the functionalization of ZnO nanostructures with the homogeneous distribution of the Au nanoparticles [40,45]. The loading of Pd nanoparticles is performed using a solution of PdCl 2 [41].…”

“…In recent years, ZnO quasi-1D nanostructures have been functionalized with the noble catalytic metals (Au, Pd, and Ag) mainly in the shape of nanoparticles [40][41][42]. Au is the most used catalyzer among the noble metals according to reported studies [40,[43][44][45]. Au nanoparticles with uniform dispersion can be loaded using Chloroauric acid (HAuCl4) as the precursor [43,44].…”

Ultrasensitive detection of low-ppm H2S gases based on palladium-doped porous silicon sensors

“…[1][2][3] The detection of gases such as H 2 S, SO 2 , and NH 3 , which can be harmful to human health, is necessary in many elds, especially environmental monitoring and process control, due to their toxicity and associated risk to the ecosystem. 4,5 In addition to the various toxic and/or combustible gaseous and liquid products generated at chemical and materials processing plants, ensuring security at airports and other public sites is a clear motivation for tracking and controlling such emissions of chemical analytes. 6 Therefore, there is high demand for high-performance sensors for monitoring harmful gas.…”