Low-temperature H2S sensors based on Ag-doped α-Fe2O3 nanoparticles

Synthesis of ZnO nanorods by spray pyrolysis for H2S gas sensor

“…Therefore, it is an ongoing need to have H 2 S sensors with high sensitivity, selectivity, reproducibility, low cost and ease of operation. Different semiconductor oxide based materials such as SnO 2 , ZnO, In 2 O 3 , ZrO 2 , CeO 2 , WO 3 , Fe 2 O 3 , have been reported as H 2 S sensor in the literature [11][12][13][14]. In general, response towards H 2 S is reported at the higher temperatures; however, there are few references wherein response at room temperature is also reported [14,15].…”

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

“…However, once the ɑ-Fe 2 O 3 was exposed to the air, the oxygen molecules was absorbed on the surface of ɑ-Fe 2 O 3 , and formed negatively charged chemisorbed 14 Results and discussion…”

Hydrothermal self-assembly of novel porous flower-like SnO 2 architecture and its application in ethanol sensor

“…And there are many pores on the nanosheets of S3, which is corresponding to the results of SEM. The formation of these pores may be caused by the sintering and crystallization of in the heat handle process [24]. Clearly, such porous feature can further increase the 3D microstructure surface area, which is advantageous for the surface sensing applications [25].…”

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a b s t r a c tDifferent morphologies of tin dioxide (SnO 2 ) architectures were prepared by increasing reaction time (12,18,24 and 48 h) under a facile hydrothermal process and followed by calcination. The crystal structures and morphologies of the hierarchical architecture were characterized in detail by means of powder X-ray diffraction (XRD), energy dispersive X-ray detector (EDX), scanning electron microscope (SEM) and transmission electron microscope (TEM).

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