Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, People's Republic of China; Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241, People's Republic of China.
Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, People's Republic of China.
Food Chem. 2022 Sep 30;389:133086. doi: 10.1016/j.foodchem.2022.133086. Epub 2022 May 5.
Gallic acid (GA) is found in a wide range of natural plants and is relevant to the health of human beings. Here, a photoelectrochemical sensing platform based on g-CN@CNT heterojunction has been prepared for the highly sensitive and selective detection of GA. Under the light of xenon lamp, the photocurrent of g-CN@CNT is 7 times higher than that of g-CN. And the sensor generates 4 times more photocurrent in the presence of GA than without GA. This sensor has a wide linear range from 10 nM to 10 μM with a limit of detection as low as 2 nM. Also, the abundant amino groups of g-CN provide excellent selectivity for the sensor. Furthermore, the sensor can be used for the analysis of GA in black tea samples, which provides a novel and rapid method for the detection of GA in food samples.
没食子酸（GA）广泛存在于天然植物中，与人类健康息息相关。在此，我们制备了一种基于 g-CN@CNT 异质结的光电化学传感平台，用于 GA 的高灵敏和选择性检测。在氙灯照射下，g-CN@CNT 的光电流比 g-CN 高 7 倍。并且，在存在 GA 的情况下，传感器产生的光电流比没有 GA 时高 4 倍。该传感器具有从 10 nM 到 10 μM 的宽线性范围，检测限低至 2 nM。此外，g-CN 丰富的氨基为传感器提供了优异的选择性。此外，该传感器可用于红茶样品中 GA 的分析，为食品样品中 GA 的检测提供了一种新颖、快速的方法。
