|
1
|
Li R, Guo W, Zhu Z, Zhai Y, Wang G, Liu Z, Jiao L, Zhu C, Lu X. Single-Atom Indium Boosts Electrochemical Dopamine Sensing. Anal Chem 2023; 95:7195-7201. [PMID: 37116176 DOI: 10.1021/acs.analchem.2c05679] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
A rational design of high-efficiency electrocatalysts and thus achieving sensitive electrochemical sensing remains a great challenge. In this work, single-atom indium anchored on nitrogen-doped carbon (In1-N-C) with an In-N4 configuration is prepared successfully through a high-temperature annealing strategy; the product can serve as an advanced electrocatalyst for sensitive electrochemical sensing of dopamine (DA). Compared with In nanoparticle catalysts, In1-N-C exhibits high catalytic performance for DA oxidation. The theoretical calculation reveals that In1-N-C has high adsorption energy for hydroxy groups and a low energy barrier in the process of DA oxidation compared to In nanoparticles, indicating that In1-N-C with atomically dispersed In-N4 sites possesses enhanced intrinsic activity. An electrochemical sensor for DA detection is established as a concept application with high sensitivity and selectivity. Furthermore, we also verify the feasibility of In1-N-C catalysts for the simultaneous detection of uric acid, ascorbic acid, and DA. This work extends the application prospect of p-block metal single-atom catalysts in electrochemical sensing.
Collapse
Affiliation(s)
- Ruimin Li
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Weiwei Guo
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Zhijun Zhu
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Yanling Zhai
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Guanwen Wang
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, P. R. China
| | - Zheng Liu
- State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, P. R. China
| | - Lei Jiao
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| | - Chengzhou Zhu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P. R. China
| | - Xiaoquan Lu
- Institute of Molecular Metrology, College of Chemistry and Chemical Engineering, Institute of Hybrid Materials, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
| |
Collapse
|
|
2
|
A dual-recognition MIP-ECL sensor based on boric acid functional carbon dots for detection of dopamine. Mikrochim Acta 2022; 189:389. [PMID: 36136158 DOI: 10.1007/s00604-022-05483-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/29/2022] [Indexed: 10/14/2022]
Abstract
We report a molecularly imprinted polymer electrochemiluminescence (MIP-ECL) sensor with dual recognition effects on dopamine (DA). Boric-acid-functionalized carbon dots (B-CDs) with good ECL performance at - 2.0 V (vs. Ag/AgCl) were prepared and immobilized on a glassy carbon electrode (GCE). The MIP was then introduced via electropolymerization using o-phenylenediamine (OPD) as a functional monomer and DA as a template molecule to fabricate the MIP-ECL sensor. The cavities in the MIP after elution were used to capture the target molecular DA. The affinity of boric acid of B-CDs to the cis-diol of DA, as well as the special recognition of MIP, provides dual recognition effects on DA. The selective readsorption of DA onto the sensor leads to the ECL quenching of B-CDs. The quenching effect was used to detect DA from 1.0 × 10-9 to 1.0 × 10-5 mol·L-1 with a detection limit of 2.1 × 10-10 mol·L-1. The dual recognition caused the MIP-ECL sensor exhibiting excellent selectivity and sensitivity toward DA. The sensor was successfully used to determine DA in real samples.
Collapse
|