Colorimetric sensing strategy for detection of cysteine, phenol cysteine, and phenol based on synergistic doping of multiple heteroatoms into sponge-like Fe/NPC nanozymes

• Published in: Analytical and bioanalytical chemistry Vol. 414; no. 14; pp. 4217 - 4225
• Main Authors: Xue, Yuting, Zhong, Haotian, Liu, Bin, Zhao, Ruixue, Ma, Jun, Chen, Zhengbo, Li, Kai, Zuo, Xia
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-06-2022; Springer; Springer Nature B.V
• Subjects: Analysis; Analytical Chemistry; Biochemistry; Biosensors; Catalytic activity; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Colorimetry; Cysteine; Drinking water; Environmental protection; Enzymes; Food Science; Identification and classification; Iron; Laboratory Medicine; Low concentrations; Methods; Monitoring/Environmental Analysis; Peroxidase; Phenols; Phosphorus; Research Paper; Sensors; China; Cysteine; Phenol; Nanozymes; Heteroatom doping; Colorimetric
• ISSN: 1618-2642; 1618-2650
• DOI: 10.1007/s00216-022-04074-8

Nanozymes have both the high catalytic activity of natural enzymes and the stability and economy of mimetic enzymes. Research on nanozymes is rapidly emerging, and the continuous development of highly catalytic active nanozymes is of far-reaching significance. This work reports heteroatomic nitrogen (N) and phosphorus (P) double-doped mesoporous carbon structures and metallic Fe coordination generated sponge-like nanozymes (Fe/NPCs) with good peroxidase activity. On this basis, we constructed a highly sensitive colorimetric sensor with cysteine and phenol as simulated analytes using Fe/NPCs nanozymes, and the response limits reached 53.6 nM and 5.4 nM, respectively. Besides, the method has high accuracy in the detection of cysteine and phenol at low concentrations in serum and tap water, which lays a foundation for application in the fields of environmental protection and biosensors.
Graphical abstract