基于金纳米粒子敏化 WO 纳米片的超高效率三甲胺气体传感器，用于快速评估海鲜的新鲜度。
Ultra-efficient trimethylamine gas sensor based on Au nanoparticles sensitized WO nanosheets for rapid assessment of seafood freshness.
机构信息
College of Food Science and Technology, Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture and Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation Shanghai Ocean University, Shanghai 201306, China.
State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
出版信息
Food Chem. 2022 Oct 30;392:133318. doi: 10.1016/j.foodchem.2022.133318. Epub 2022 May 26.
Trimethylamine (TMA) is an organic amine gas used as an important index to assess the seafood freshness. In this work, an ultra-efficient trimethylamine gas sensor was constructed by ultrasonic treatment loading of Au nanoparticles (∼4 nm) on WO nanosheets prepared by solvothermal self-assembly method. The response of the sensor to 25 ppm TMA was as high as 217.72 (R/R) at 300 ℃. In addition, the Au/WO nanosheets sensor exhibited rapid response-recovery time (8 s/6 s), low detection limit (0.5 ppm), and high selective detection of TMA. Moreover, the composition of volatiles produced by decay of Larimichthys crocea (0-15 days) was examined, which proved that the detection of TMA by the Au/WO sensor can evaluate the freshness of Larimichthys crocea. Such a magnificent gas sensing performance reveals that the Au/WO sensor has remarkable application potential in rapid and non-destructive seafood freshness assessment on the spot.
三甲胺（TMA）是一种有机胺气体，常被用作评估海鲜新鲜度的重要指标。在这项工作中，通过超声处理负载约 4nm 的金纳米粒子（Au NPs）于溶剂热自组装法制备的 WO 纳米片中，构建了一种超高效 TMA 气体传感器。该传感器在 300℃时对 25ppm TMA 的响应高达 217.72（R/R）。此外，Au/WO 纳米片传感器表现出快速的响应-恢复时间（8s/6s）、低检测限（0.5ppm）和对 TMA 的高选择性检测。此外，还检测了大黄鱼（0-15 天）腐败过程中产生的挥发性物质的组成，证明 Au/WO 传感器对 TMA 的检测可以评估大黄鱼的新鲜度。如此出色的气体传感性能表明，Au/WO 传感器在现场快速、无损的海鲜新鲜度评估方面具有显著的应用潜力。
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