An ethanol gas sensor using energy transfer cataluminescence on nanosized YVO4:Eu3+ surface

作者：Zhou Qin; Zhang Lichun; Fan Hanyu; Wu Lan; Lv Yi^*

来源：Sensors and Actuators B: Chemical , 2010, 144(1): 192-197.

DOI：10.1016/j.snb.2009.10.057

• Cataluminescence
• Gas sensor
• YVO4:Eu3+ nanocrystals
• Ethanol

In the present work, a novel and highly sensitive gas sensor for ethanol was demonstrated based on the intensive cataluminescence emission on the sui face of YVO4:Eu3+ luminescent nanocrystals. By a hydrothermal synthesis process with surfactant (PEG 4000), the rice-like sensing material (YVO4:Eu3+) Was Successfully obtained. Considering the cataluminescence spectra and the fluorescence spectra of YVO4:Eu3+ nanocrystals, an energy transfer mechanism from excited intermediates to the YVO4:Eu3+ nanocrystals was proposed. Under the optimized conditions, the present gas sensor exhibited a linear range of 0.2-31.5 mu g mL(-1), with a limit of detection of 0.03 mu g mL(-1) (S/N=3). The proposed gas sensor showed good characteristics with fast response, high sensitivity and good stability.

• 出版日期2010-1-29
• 单位四川大学