Journal
BIOSENSORS-BASEL
Volume 11, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/bios11010001
Keywords
electrochemical aptasensor; lead; aptamer; nanoporous carbon
Funding
- Shanghai Agriculture Applied Technology Development Program, China [T20180413]
- Young Elite Scientists Sponsorship Program by CAST [2017QNRC001]
- Chenguang Program - Shanghai Education Development Foundation
- Shanghai Municipal Education Commission [17CG07]
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A new double-shelled carbon nanocages material was synthesized and developed into an aptasensor for determining Pb2+ in aqueous solution. The aptasensor exhibited a good linear relationship with Pb2+ concentration and detection limits, showing promising applications in environmental monitoring.
A new double-shelled carbon nanocages material was synthesized and developed an aptasensor for determining Pb2+ in aqueous solution. Herein, nanoporous carbon materials derived from core-shell zeolitic imidazolate frameworks (ZIFs) demonstrated excellent electrochemical activity, stability, and high specificity surface area, consequently resulting in the strong binding with aptamers. The aptamer strands would be induced to form G-quadruplex structure when Pb2+ was introduced. Under optimal conditions, the aptasensor exhibited a good linear relationship of Pb2+ concentration ranging from 0.1 to 10 mu g L-1 with the detection limits of 0.096 mu g L-1. The feasibility was proved by detecting Pb2+ in spiked water samples and polluted soil digestion solution. The proposed aptasensor showed excellent selectivity and reproducibility, indicating promising applications in environmental monitoring.
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