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Citation: ZHU Wei-Ran, HAO Nan, YANG Xiao-Di, WANG Kun. Cascade-catalyzed Enzyme-free Colorimetric Detection of Glucose Based on Manganese Dioxide-oxygen Doped Carbon Nitride Composites[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(6): 727-732. doi: 10.19756/j.issn.0253-3820.201047 shu

Cascade-catalyzed Enzyme-free Colorimetric Detection of Glucose Based on Manganese Dioxide-oxygen Doped Carbon Nitride Composites

1.
School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China;
2.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

Received Date: 17 January 2020
Revised Date: 28 February 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21675066, 21575067).

A cascade-catalyzed enzyme-free colorimetric sensor based on manganese dioxide (MnO₂)-oxygen doped carbon nitride (OCN) composite was developed for glucose detection. The MnO₂-OCN composite was prepared by chemically precipitating MnO₂ crystals on the surface of OCN. The excellent peroxidase-like activity of OCN accelerated the consumption of H₂O₂ produced by MnO₂ catalytic oxidation of glucose, which significantly improved the catalytic detection performance of glucose. The enzyme-free colorimetric sensor based on the MnO₂-OCN composite had a wide detection range (0.05-2.00 mmol/L), with a limit of detection (LOD, S/N=3) of 23 μmol/L. The recoveries of glucose spiked in serum were 91.9%-94.3%. Meanwhile, the sensor had a good specificity towards the recognition and catalytic oxidation of glucose for colorimetric detection.
- Manganese dioxide,
- Oxygen doped carbon nitride,
- Glucose,
- Colorimetric,
- Enzyme-free detection
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