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Tytuł pozycji:

Highly sensitive detection of microcystin-LR under visible light using a self-powered photoelectrochemical aptasensor based on a CoO/Au/g-C 3 N 4 Z-scheme heterojunction.

Tytuł :
Highly sensitive detection of microcystin-LR under visible light using a self-powered photoelectrochemical aptasensor based on a CoO/Au/g-C 3 N 4 Z-scheme heterojunction.
Autorzy :
Tang L; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Ouyang X; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Peng B; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Zeng G; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Zhu Y; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Yu J; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Feng C; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Fang S; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Zhu X; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
Tan J; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. (Hunan University), Ministry of Education, Changsha 410082, Hunan, China.
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Źródło :
Nanoscale [Nanoscale] 2019 Jul 07; Vol. 11 (25), pp. 12198-12209. Date of Electronic Publication: 2019 Jun 14.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Original Publication: Cambridge, UK : RSC Pub.
MeSH Terms :
Electrochemical Techniques*
Light*
Photochemical Processes*
Copper/*chemistry
Gold/*chemistry
Microcystins/*chemistry
Substance Nomenclature :
0 (Microcystins)
7440-57-5 (Gold)
77238-39-2 (microcystin)
789U1901C5 (Copper)
V1XJQ704R4 (cupric oxide)
Entry Date(s) :
Date Created: 20190615 Date Completed: 20191211 Latest Revision: 20191217
Update Code :
20210210
DOI :
10.1039/c9nr03004b
PMID :
31199416
Czasopismo naukowe
Based on the unique photoelectrochemical properties of a CoO/Au/g-C 3 N 4 Z-scheme heterojunction, a self-powered photoelectrochemical (PEC) aptasensor was constructed for the detection of microcystin-leucine arginine (MC-LR). Z-scheme heterojunctions can promote the separation of a photo-induced electron-hole pair, and the surface plasmonic resonance (SPR) of Au nanoparticles can significantly enhance the adsorption of visible light. Importantly, MC-LR molecules were captured by aptamers initially immobilized on the modified electrode due to their high affinity, and then oxidized by the photogenerated holes, which caused an amplified photocurrent signal, allowing the quantitative analysis of MC-LR by measuring the photocurrent intensity change. This PEC MC-LR aptasensor showed high sensitivity and selectivity within a wide linear response range from 0.1 pM to 10 nM and a detection limit of 0.01 pM. The application of this sensor in the analysis of lake water samples provided accurate results with a relative standard deviation (RSD) of 2.6%-4.2%.

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