Speaker
Description
The development of highly selective and low-temperature gas sensors remains an imperative challenge for air quality monitoring and industrial safety. The toxicity and flammability of toluene, along with its associated risks to human health, render early detection and real-time monitoring essential. This study explores the novel Cr2O3-core@SnO2-shell heterostructures functionalized with silver (Ag) nanoparticles to improve charge transfer and promote catalytic surface reactions. Structural analyses confirmed the formation of heterostructures, a multi-core-shell structure, and successful noble-metal decoration. The Brunauer, Emmett, and Teller (BET) analysis reported an enhanced surface area of 143.11 m2/g for 0.5%Ag-Cr2O3@SnO2. Gas sensing measurements demonstrated enhanced toluene detection at an optimal operating temperature of 200 °C. The sensor displayed outstanding repeatability and humidity-resistant behaviour over 10-50% RH, with a sub-ppm limit of detection. The enhanced performance is attributed to increased active gas adsorption sites enabled by its large surface area and adsorption volume, and to synergistic catalytic and electronic sensitization effects, promoting efficient gas adsorption and charge transfer to Ag nanoparticles.
| Apply for student award at which level: | MSc |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |