Low cost fabrication of highly sensitive ethanol sensor based on Pd-doped α-Fe 2 O 3 porous nanotubes
Source abstract
Abstract
Abstract Pure and Pd-doped α-Fe2O3 porous nanotubes (PNTs) are synthesized by a facile electrospinning approach. Different Pd dopant concentrations are introduced to investigate the dopant’s role in sensing performance. The structures and chemical compositions of the as-prepared products are examined using a series of characterization methods including XRD, EDS, SEM, TEM, XPS and BET. The gas-sensing properties of the sensor based on above PNTs are studied. And the results reveal that, compared with pure α-Fe2O3, the 3.0 wt% Pd-doped α-Fe2O3 PNTs sensors exhibit superior performance in ethanol detection (at 240 °C). The highest sensitivity reaches 65.4 for 50 ppm ethanol and the detection limit is as low as 0.1 ppm. In addition, the sensors also show excellent selectivity, good long-term stability and as well as rapid response/recovery time (8 s/30 s, respectively) to ethanol. The improvement of sensing performance is mainly attributed to the dramatic sensitization of the additional Pd components.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Analytical Chemistry and Sensors · Gas Sensing Nanomaterials and Sensors · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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