Construction of mesoporous WO3 nanofibers functionalized with nanoscale PtO catalysts for enhanced acetone sensing properties
Source abstract
Abstract
In this study, we demonstrated a facile one-step electrospinning technique to construct mesoporous PtO−WO 3 nanofibers (NFs) for highly sensitive and selective acetone sensing. The well-dispersed PtO nanocatalysts (∼6 nm) were evenly immobilized within the mesoporous WO 3 NFs. These features provided efficacious catalysis, gas diffusion, and numerous active sites to maximize the interaction between active O 2− and acetone molecules. Sensing results revealed that the PtO−WO 3 NFs showed much enhanced acetone sensing properties in comparison with pure WO 3 NFs. The response of the 0.5 % PtO−WO 3 NFs to 100 ppm acetone at 260 °C was about 6.5-fold higher than that of the pure WO 3 NFs at 375 °C. The optimum operating temperature shifted significantly from 375 °C of pure WO 3 NFs to 260 °C of PtO−WO 3 NFs. Moreover, good selectivity and stability to acetone were also observed for the 0.5 % PtO−WO 3 NFs. The large improvement of acetone sensing characteristics can be ascribed to the mesopore fiber topography and heterogeneous sensitization and catalytic effects of PtO nanocatalysts. Our work revealed that mesoporous WO 3 NFs with uniformly distributed PtO nanocatalysts have great potential in detecting acetone.
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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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