Speaker
Description
Cerium oxide (CeO2) nanomaterials are being studied as potential candidates for gas sensors. Gas sensors based on metal oxides and their nanocomposites have attracted significant public attention over the past decades due to their excellent potential for applications in environmental pollution remediation, the transportation industry, and personal safety. Thus, herein, CeO2 nanostructured materials were prepared by the assisted hydrothermal method using trimethyl amide (TMA) as a surfactant, with urea molarity ranging from 0.5 to 2.0 M and a reaction temperature of 120 °C. Changes in crystal lattice size were observed by varying urea molarity from 0.5 M to 2.0 M at a reaction temperature of 120 °C. Photoluminescence studies showed that CeO2 prepared at 120 ᵒC using TMA as a surfactant and a urea concentration of 1.5 M has higher surface defect-related emissions arising from oxygen vacancies and Ce³⁺ states, resulting in broad visible luminescence. The materials exhibited superior sensitivity to LPG over the 300–1200 ppm concentration range at an operating temperature of 175 °C. The enhanced LPG sensing performance (300–1200 ppm) at 175 °C is attributed to the optimized synthesis conditions (TMA surfactant, 1.5 M urea, and 120 °C), which likely promoted favorable morphology and active surface sites.
| Apply for student award at which level: | PhD |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |