Highly selective NOx chemiresistive sensor based on n-type tungsten oxide nanorods
Source abstract
Abstract
In this article, tungsten trioxide (WO3) nanorods were successfully synthesized by a hydrothermal method and used for the detection of NOx. X-ray diffraction analysis revealed the hexagonal phase of WO3. Field emission scanning electron microscopy and transmission electron microscopy showed WO3 nanorods with an average diameter of 200 nm. X-ray photoelectron spectroscopy analysis showed that the oxidation state of tungsten in WO3 was +6. The WO3 sensor exhibited high sensitivity for the detection of NOx (50 ppm) at 250°C. The sensor showed good linearity from 10 to 50 ppm of NOx, with a sensing response of 8–84%. Even under a high humidity (83%) environment, the sensor detected 50 ppm of NOx. The sensor exhibited good selectivity towards NOx compared to other oxidizing and reducing gases. The sensor also showed excellent stability even after 4 weeks.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Chemical Sensor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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