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<p>Detecting hazardous gases is vital for protecting the environment and ensuring workplace safety. Advanced gas sensors are essential for identifying these gases, allowing for swift action to minimize risks. Creating cost-effective and high-performance sensing technologies is crucial for accurately monitoring air quality. In this study, cerium oxide (CeO<sub>2</sub>) nanoparticles (NPs) were synthesized through a simple hydrothermal method for use as a gas-sensing material. The structural and morphological properties of the synthesized CeO<sub>2</sub> NPs were thoroughly characterized. X-ray diffraction (XRD) analysis indicated a crystalline size of approximately 6&#xa0;nm. Ultraviolet–visible (UV–Vis) spectroscopy revealed a band gap energy of 3.07&#xa0;eV. Scanning electron microscopy (SEM) images showed nanosized, rock-like CeO<sub>2</sub> particles with irregular shapes and a porous structure. The gas sensing performance of the CeO<sub>2</sub> NPs was systematically evaluated in terms of sensitivity, selectivity, response time, and recovery time. The sensing capabilities were tested against various gases, including ethanol, methanol, CO<sub>2</sub>, liquefied petroleum gas (LPG), hydrogen sulfide (H<sub>2</sub>S), chlorine (Cl<sub>2</sub>), and ammonia (NH<sub>3</sub>), using a standard domestic gas sensing setup. Tests were conducted across a temperature range of 50 to 400&#xa0;°C. The highest sensor response was observed for NH<sub>3</sub> gas at 100&#xa0;°C with a concentration of 100&#xa0;ppm.</p>

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Nanosynthesized CeO2 polyhedra: diverse chemiresistive behavior toward volatile and non-volatile analytes

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Laxmi Dilip Sonawane,
  • Abhinay Subhash Mandawade,
  • Manoj Annasaheb More,
  • Laxman Namdeo Bhoye,
  • Huda Imran Ahemad,
  • Yogesh Bhaskar Aher,
  • Momin Shoaib Malik,
  • Anil Bhanudas Gite,
  • Sarika Digamber Shinde,
  • Ganesh Eknath Patil,
  • Vishal H. Goswami,
  • Ramesh B. Bhise,
  • Pradip B. Sarawade,
  • Mahendra Shantaram Shinde

摘要

Detecting hazardous gases is vital for protecting the environment and ensuring workplace safety. Advanced gas sensors are essential for identifying these gases, allowing for swift action to minimize risks. Creating cost-effective and high-performance sensing technologies is crucial for accurately monitoring air quality. In this study, cerium oxide (CeO2) nanoparticles (NPs) were synthesized through a simple hydrothermal method for use as a gas-sensing material. The structural and morphological properties of the synthesized CeO2 NPs were thoroughly characterized. X-ray diffraction (XRD) analysis indicated a crystalline size of approximately 6 nm. Ultraviolet–visible (UV–Vis) spectroscopy revealed a band gap energy of 3.07 eV. Scanning electron microscopy (SEM) images showed nanosized, rock-like CeO2 particles with irregular shapes and a porous structure. The gas sensing performance of the CeO2 NPs was systematically evaluated in terms of sensitivity, selectivity, response time, and recovery time. The sensing capabilities were tested against various gases, including ethanol, methanol, CO2, liquefied petroleum gas (LPG), hydrogen sulfide (H2S), chlorine (Cl2), and ammonia (NH3), using a standard domestic gas sensing setup. Tests were conducted across a temperature range of 50 to 400 °C. The highest sensor response was observed for NH3 gas at 100 °C with a concentration of 100 ppm.