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A non-enzymatic photoelectrochemical sensor based on g-C3N4@CNT heterojunction for sensitive detection of antioxidant gallic acid in food.
- Source :
-
Food Chemistry . Sep2022, Vol. 389, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] • A low cost and simple method for the detection of gallic acid in food. • The g-C 3 N 4 @CNT has good chemical stability and non-toxicity. • This is a covalently bonded "signal-on" high-sensitivity non-enzyme PEC sensor. • The constructed PEC sensor has an ultra-low LOD and a wide linear range. • This is first PEC sensor based on g-C 3 N 4 @CNT heterojunction to detect gallic acid. 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-C 3 N 4 @CNT heterojunction has been prepared for the highly sensitive and selective detection of GA. Under the light of xenon lamp, the photocurrent of g-C 3 N 4 @CNT is 7 times higher than that of g-C 3 N 4. 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-C 3 N 4 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GALLIC acid
*HETEROJUNCTIONS
*DETECTORS
*AMINO group
*CHEMICAL stability
*GREEN tea
Subjects
Details
- Language :
- English
- ISSN :
- 03088146
- Volume :
- 389
- Database :
- Academic Search Index
- Journal :
- Food Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 156984191
- Full Text :
- https://doi.org/10.1016/j.foodchem.2022.133086