期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 9, 页码 8598-8603出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c02114
关键词
C3N4; P3HT; nanocomposites; photoelectrochemical; H2O2
资金
- National Natural Science Foundation of China [21822403, 21775045]
Herein, a metal-free photoelectrochemical (PEC) cathodic biosensor based on a composite material of graphitic carbon nitride (g-C3N4) and a conjugated polymer of poly(3-hexylthiophene) (P3HT) is proposed. The formation of a p-n heterojunction between g-C3N4 and P3HT through pi-pi stacking induced a high degree of molecular ordering, efficient charge separation, and a significantly enhanced PEC performance. The g-C3N4/P3HT PEC cathodic sensor implements sensitive and selective detection of hydrogen peroxide secreted from living cells in a wide linear range from 1.0 to 800 mu M with a limit of detection of 0.38 mu M. We believed that the metal-free PEC cathodic detection strategy opens up an excellent biodetection approach with high biocompatibility.
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