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Lai T, Shu H, Yao B, Lai S, Chen T, Xiao X, Wang Y. A Highly Selective Electrochemical Sensor Based on Molecularly Imprinted Copolymer Functionalized with Arginine for the Detection of Chloramphenicol in Honey. BIOSENSORS 2023; 13:bios13050505. [PMID: 37232866 DOI: 10.3390/bios13050505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/24/2023] [Accepted: 04/24/2023] [Indexed: 05/27/2023]
Abstract
Developing an efficient method for chloramphenicol (CAP) detection is of great significance for food safety. Arginine (Arg) was selected as a functional monomer. Benefiting from its excellent electrochemical performance, which is different from traditional functional monomers, it can be combined with CAP to form a highly selective molecularly imprinted polymer (MIP) material. It overcomes the shortcoming of poor MIP sensitivity faced by traditional functional monomers, and achieves high sensitivity detection without compounding other nanomaterials, greatly reducing the preparation difficulty and cost investment of the sensor. The possible binding sites between CAP and Arg molecules were calculated by molecular electrostatic potential (MEP). A low-cost, non-modified MIP electrochemical sensor was developed for the high-performance detection of CAP. The prepared sensor has a wide linear range from 1 × 10-12 mol L-1 to 5 × 10-4 mol L-1, achieves a very low concentration CAP detection, and the detection limit is 1.36 × 10-13 mol L-1. It also exhibits excellent selectivity, anti-interference, repeatability, and reproducibility. The detection of CAP in actual honey samples was achieved, which has important practical value in food safety.
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Affiliation(s)
- Tingrun Lai
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
| | - Hui Shu
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
| | - Bo Yao
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
| | - Siying Lai
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
| | - Ting Chen
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Xuechun Xiao
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
| | - Yude Wang
- Yunnan Key Laboratory of Carbon Neutrality and Green Low-Carbon Technologies, Yunnan University, Kunming 650504, China
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Shi M, Yang H, Zhao Z, Ren G, Meng X. Bismuth-based semiconductors applied in photocatalytic reduction processes: fundamentals, advances and future perspectives. Chem Commun (Camb) 2023; 59:4274-4287. [PMID: 36942529 DOI: 10.1039/d3cc00580a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Bismuth-based semiconductors (BBSs) with their typical layered structures and unique electronic properties are considered an attractive visible light-responsive photocatalysts. Recently, BBS exhibited promising properties and was rapidly developed in photoreduction reactions. In this review, we firstly focus on the photoreduction reactions of BBS with a description of the basic principles. Specifically, the restrictive factors of the photoreduction reactions and the design directions of the catalysts are addressed. BBS photocatalysts, such as bismuth oxide, bismuth halide oxide and bismuth-based oxygenates, are presented in terms of the catalyst material design, crystal structure and other features. Furthermore, the primary applications of BBS in photoreduction reactions are described, including CO2 reduction, N2 reduction, H2 evolution, and nitrate reduction. Additionally, the advances and shortages of BBS applied in these processes are summarized and comprehensively discussed. Future works for BBS applied in photoreduction processes are also proposed.
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Affiliation(s)
- Meng Shi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Huiying Yang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Zehui Zhao
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Guangmin Ren
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
| | - Xiangchao Meng
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
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Zhang B, Li F, Shen L, Chen L, Xia Z, Ding J, Li M, Guo LH. A cathodic photoelectrochemical immunoassay with dual signal amplification for the ultrasensitive detection of DNA damage biomarkers. Biosens Bioelectron 2023; 224:115052. [PMID: 36603285 DOI: 10.1016/j.bios.2022.115052] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/21/2022] [Accepted: 12/28/2022] [Indexed: 12/31/2022]
Abstract
Toxicity screening and risk assessment of an overwhelmingly large and ever-increasing number of chemicals are vitally essential for ecological safety and human health. Genotoxicity is particularly important because of its association with mutagenicity, carcinogenicity and cancer. Phosphorylated histone H2AX (γH2AX) is an early sensitive genotoxic biomarker. It is therefore highly desirable to develop analytical methods for the detection of trace γH2AX to enable screening and assessment of genotoxicity. Here, we developed a novel cathodic photoelectrochemical (PEC) immunoassay with dual signal amplification for the rapid and ultrasensitive detection of γH2AX in cell lysates. A sandwich immuno-reaction targeting γH2AX was first carried out on a 96-well plate, using a secondary antibody/gold nanoparticle/glucose oxidase conjugate as the labeled detection antibody. The conjugate increased the production of H2O2 and thus provided the first mechanism of signal amplification. The immuno-reaction product containing H2O2 was then detected on a photocathode prepared from Bi2+xWO6 rich in oxygen vacancies, with H2O2 acting as electron acceptor. The oxygen vacancies acted as both adsorption and activation sites of H2O2 and thus enhanced the photocurrent, which provided another mechanism of signal amplification. As a result, an ultrasensitive immunoassay for γH2AX determination was established with a limit of detection of 6.87 pg/mL (S/N = 3) and a wide linear range from 0.01 to 500 ng/mL. The practicability of this assay was verified by detecting γH2AX in cell lysates exposed to known genotoxic chemicals. Our work offers a promising tool for the screening of genotoxic chemicals and opening a new avenue toward environmental risk assessment.
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Affiliation(s)
- Bihong Zhang
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Fangfang Li
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Linyu Shen
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Lu Chen
- Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; College of Life Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Zhiqiang Xia
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Jinjian Ding
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China
| | - Minjie Li
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China.
| | - Liang-Hong Guo
- College of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China; Institute of Environmental and Health Sciences, China Jiliang University, Hangzhou, Zhejiang, 310016, PR China.
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Chen Y, Zhao L, Wu X, Dong Y, Wang GL. Self-coordinated nanozyme on Cu 3BiS 3 nanorods for high-performance aptasensing. Mikrochim Acta 2022; 189:419. [PMID: 36251095 DOI: 10.1007/s00604-022-05524-x] [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: 05/11/2022] [Accepted: 10/01/2022] [Indexed: 11/28/2022]
Abstract
A novel strategy is reported to access high-performance nanozymes via the self-coordination of ferrocyanides ([Fe(CN)6]4-) onto the surface of the Cu3BiS3 (CBS) nanorods. Notably, the in situ formed nanozymes had high catalytic activity, good stability, low cost, and easy mass production. The formed nanozyme catalyzed the oxidation of the typical chromogenic substrate of 3,3',5,5'-tetramethylbenzidine (TMB) with a distinctive absorption peak at 652 nm, accompanied by a blue color development. Moreover, the attachment of deoxyribonucleoside 5'-monophosphates (dNMP) beforehand onto the surface of CBS prevented coordination of ferrocyanides and resulted in the tunable formation of the nanozyme, thereby enabling the construction of an exquisite biosensing platform. Taking the aptasensing of chloramphenicol (CAP) as an example, the engineered nanozyme allowed the construction of a homogenous, label-free, and high-performance bioassay in terms of its convenience and high sensitivity. Under the optimal conditions, changes in the absorption intensity at 652 nm for the oxidized TMB provides a good linear correlation with the logarithm of CAP concentrations in the range 0.1 pM to 100 nM, and the limit of detection was 0.033 pM (calculated from 3σ/s). Considering a vast number of bioreactions can be connected to dNMP production, we expect the engineerable nanozyme as a universal signal transduction scaffold for versatile applications in bioassays. Through the attachment of deoxyribonucleoside 5'-monophosphate (dNMP) on the surface of CBS to regulate the generation of self-coordinated nanozyme CBS/BiHCF, a homogeneous, label-free, and high-performance universal aptasensing platform was constructed.
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Affiliation(s)
- Yanru Chen
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Lingling Zhao
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Xiuming Wu
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Yuming Dong
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Guang-Li Wang
- Key Laboratory of Synthetic and Biological Colloids (Ministry of Education), School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
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