期刊
APPLIED SURFACE SCIENCE
卷 636, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2023.157803
关键词
Crystal facet engineering; Ciprofloxacin; Photoelectrochemical aptasensor
This study successfully designed and prepared Bi12O17Cl2 nanosheets with exposed (200) facets, which exhibited open charge channel characteristic, narrow band gap, strong visible light harvesting ability, and significantly broadened light absorption range. Based on these characteristics, a PEC aptasensor was constructed for detecting CIP by incorporating the specific recognition ability of CIP aptamer. The PEC aptasensor showed a detection range of 1.00 x 10-2-1.00 ng L-1 and a detection limit of 3.33 pg L-1.
Photoelectrochemical (PEC) aptasensor with high sensitivity, quick response, facile miniaturization, and low-cost has emerged as a prospectively method for detecting ciprofloxacin (CIP). A crucial issue in constructing PEC aptasensor is how to modulate photogenerated charges behaviors of photoelectric active materials. Bi12O17Cl2 nanosheets with exposed (200) facets have been designed and prepared in this work, which exhibited the open charge channel characteristic, narrow band gap, strong visible light harvesting ability, and significantly broadened light absorption range. These characteristics are conducive to the effective generation, separation and transfer of charges for possessing strong photocurrent signal. Based on the Bi12O17Cl2 nanosheets with exposed (200) facets and CIP aptamer with specific recognition ability, a PEC aptasensor was constructed for detecting CIP. The PEC aptasensor showed a detection range of 1.00 x 10-2-1.00 ng L-1 and the detection limit of 3.33 pg L-1 (S/N = 3). The constructed PEC aptasensor also can demonstrate good sensitivity, selectivity, reproducibility, and feasibility.
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