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Wang H, Qian D, Xiao X, Deng C, Liao L, Deng J, Lin YW. Preparation and application of a carbon paste electrode modified with multi-walled carbon nanotubes and boron-embedded molecularly imprinted composite membranes. Bioelectrochemistry 2018; 121:115-124. [PMID: 29413861 DOI: 10.1016/j.bioelechem.2018.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 01/14/2018] [Accepted: 01/14/2018] [Indexed: 12/29/2022]
Abstract
An innovative electrochemical sensor was fabricated for the sensitive and selective determination of tinidazole (TNZ), based on a carbon paste electrode (CPE) modified with multi-walled carbon nanotubes (MWCNTs) and boron-embedded molecularly imprinted composite membranes (B-MICMs). Density functional theory (DFT) calculations were carried out to investigate the utility of template-monomer interactions to screen appropriate monomers for the rational design of B-MICMs. The distinct synergic effect of MWCNTs and B-MICMs was evidenced by the positive shift of the reduction peak potential of TNZ at B-MICMs/MWCNTs modified CPE (B-MICMs/MWCNTs/CPE) by about 200 mV, and the 12-fold amplification of the peak current, compared with a bare carbon paste electrode (CPE). Moreover, the coordinate interactions between trisubstituted boron atoms embedded in B-MICMs matrix and nitrogen atoms of TNZ endow the sensor with advanced affinity and specific directionality. Thereafter, a highly sensitive electrochemical analytical method for TNZ was established by different pulse voltammetry (DPV) at B-MICMs/MWCNTs/CPE with a lower detection limit (1.25 × 10-12 mol L-1) (S/N = 3). The practical application of the sensor was demonstrated by determining TNZ in pharmaceutical and biological samples with good precision (RSD 1.36% to 3.85%) and acceptable recoveries (82.40%-104.0%).
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Affiliation(s)
- Hongjuan Wang
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Duo Qian
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Xilin Xiao
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China.
| | - Chunyan Deng
- College of Chemistry and Chemical Engineering, Key Laboratory of Resources Chemistry of Nonferrous Metals, Central South University, Changsha, Hunan 410083, PR China
| | - Lifu Liao
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Jian Deng
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China.
| | - Ying-Wu Lin
- School of Chemistry and Chemical Engineering, Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
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Tu MC, Chen HY, Wang Y, Moochhala SM, Alagappan P, Liedberg B. Immunosensor based on carbon nanotube/manganese dioxide electrochemical tags. Anal Chim Acta 2014; 853:228-233. [PMID: 25467463 DOI: 10.1016/j.aca.2014.09.050] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/22/2014] [Accepted: 09/26/2014] [Indexed: 10/24/2022]
Abstract
This article reports on carbon nanotube/manganese dioxide (CNT-MnO2) composites as electrochemical tags for non-enzymatic signal amplification in immunosensing. The synthesized CNT-MnO2 composites showed good electrochemical activity, electrical conductivity and stability. The electrochemical signal of CNT-MnO2 composites coated glassy carbon electrode (GCE) increased by nearly two orders of magnitude compared to bare GCE in hydrogen peroxide (H2O2) environment. CNT-MnO2 composite was subsequently validated as electrochemical tags for sensitive detection of α-fetoprotein (AFP), a tumor marker for diagnosing hepatocellular carcinoma. The electrochemical immunosensor demonstrated a linear response on a log-scale for AFP concentrations ranging from 0.2 to 100 ng mL(-1). The limit of detection (LOD) was estimated to be 40 pg mL(-1) (S/N=3) in PBS buffer. Further measurements using AFP spiked plasma samples revealed the applicability of fabricated CNT-MnO2 composites for clinical and diagnostic applications.
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Affiliation(s)
- Meng-Che Tu
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore; Center for Biomimetic Sensor Science, 50 Nanyang Drive, 637553, Singapore
| | - Han-Yi Chen
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore; Tum Create, 1 Create Way #10-02 Create Tower, 138602, Singapore
| | - Yuxi Wang
- Tum Create, 1 Create Way #10-02 Create Tower, 138602, Singapore
| | | | - Palaniappan Alagappan
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore; Center for Biomimetic Sensor Science, 50 Nanyang Drive, 637553, Singapore
| | - Bo Liedberg
- School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore; Center for Biomimetic Sensor Science, 50 Nanyang Drive, 637553, Singapore.
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Yu CL, Lo NC, Cheng H, Tsuda T, Sakamoto T, Chen YH, Kuwabata S, Chen PY. An ionic liquid-Fe3O4 nanoparticles-graphite composite electrode used for nonenzymatic electrochemical determination of hydrogen peroxide. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.07.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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He S, Zhang B, Liu M, Chen W. Non-enzymatic hydrogen peroxide electrochemical sensor based on a three-dimensional MnO2 nanosheets/carbon foam composite. RSC Adv 2014. [DOI: 10.1039/c4ra09007a] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Three dimensional MnO2 nanosheets/carbon foam has been fabricated and they exhibit promising electrochemical sensing performance for nonenzymatic H2O2 detection.
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Affiliation(s)
- Shuijian He
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, China
- University of Chinese Academy of Sciences
| | - Boya Zhang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, China
| | - Minmin Liu
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, China
- University of Chinese Academy of Sciences
| | - Wei Chen
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022, China
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