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7013105 
Journal Article 
Cascade-catalyzed Enzyme-free Colorimetric Detection of Glucose Based on Manganese Dioxide-oxygen Doped Carbon Nitride Composites 
Zhu Wei-Ran; Hao Nan; Yang Xiao-Di; Wang Kun; , 
2020 
Yes 
Chinese Journal of Analytical Chemistry / Fen Xi Hua Xue
ISSN: 0253-3820 
SCIENCE PRESS 
BEIJING 
48 
6 
727-732 
WOS:000539012600007 
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 mu mol/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