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Zhang S, Zheng H, Sun Y, Li F, Li T, Liu X, Zhou Y, Chen W, Ju H. Oxygen vacancies enhanced photoelectrochemical aptasensing of 2, 3', 5, 5'-tetrachlorobiphenyl amplified with Ag 3VO 4 nanoparticle-TiO 2 nanotube array heterostructure. Biosens Bioelectron 2020; 167:112477. [PMID: 32810703 DOI: 10.1016/j.bios.2020.112477] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/14/2020] [Accepted: 07/25/2020] [Indexed: 12/26/2022]
Abstract
This work proposed an enhancing mechanism of both oxygen vacancies (OVs) and the heterostructure for amplifying the photoelectrochemical (PEC) aptasensing signal. The OVs were formed by in situ electrochemical reduction of TiO2 nanotube arrays (TNTAs), and well-separated Ag3VO4 nanoparticles (NPs) were then deposited on the TNTAs. The band gaps and positions of these nanomaterials were evaluated by Tauc equation and Mott-Schottky plots to verify the formation of the heterojunction. The OVs and heterojunction greatly enhanced the visible light absorption and improved the charge separation of TNTAs. The amplified PEC signal could be quenched by the resonance energy transfer between Ag3VO4 NPs and gold nanorods (Au NRs), which were labeled on the complementary DNA (cDNA) to the aptamer immobilized on the heterojunction. Upon the recognition of the aptamer to target analyte, the Au NR-cDNA was detached from the sensor, leading to a "signal-on" aptasensing strategy. Under optimal conditions, the PEC aptasensor displayed a detection limit of 0.015 pg mL-1 and a linear range from 0.02 to 300 ng mL-1 for 2,3',5,5'-tetrachlorobiphenyl.
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Affiliation(s)
- Si Zhang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Hejie Zheng
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Yuping Sun
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Fen Li
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Tongtong Li
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Xiaoqiang Liu
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China.
| | - Yanmei Zhou
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Weiwei Chen
- State Key Laboratory of Analytical Chemistry for Life Science, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China.
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Xiao R, Abdu HI, Wei L, Wang T, Huo S, Chen J, Lu X. Fabrication of magnetic trimetallic metal–organic frameworks for the rapid removal of tetracycline from water. Analyst 2020; 145:2398-2404. [DOI: 10.1039/c9an02481f] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The metal–organic framework (MOF-74) series has the most open metal sites.
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Affiliation(s)
- Rui Xiao
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Hassan Idris Abdu
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Liping Wei
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Tieying Wang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Shuhui Huo
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Jing Chen
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
| | - Xiaoquan Lu
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province
- College of Chemistry & Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
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