1
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Atayde E, Takenaka Y, Abe H, Wu MR, Wu KCW. Porphyrin-Grafted Poly(ethylene terephthalate) as a Reusable and Highly Selective Colorimetric Probe for Mercuric Ion Contaminants in Aqueous Samples. ACS APPLIED MATERIALS & INTERFACES 2024; 16:39195-39205. [PMID: 39038227 PMCID: PMC11299150 DOI: 10.1021/acsami.4c03846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 06/25/2024] [Accepted: 07/11/2024] [Indexed: 07/24/2024]
Abstract
Heavy metals are the most hazardous water pollutants, with severe health and environmental consequences. Among these, mercuric (Hg2+) ions are known to cause detrimental health issues in both humans and aquatic life. Due to this, several analytical techniques have been devised to detect and quantify the amount of this ion. However, most of these require advanced instrumentation, prolonged analysis time, and sample preparation. In this study, a low-cost and highly reusable colorimetric probe was developed by grafting porphyrin to poly(ethylene terephthalate) sheets using an oxazoline polymer as covalent adhesive. Upon exposure to trace amounts of Hg2+ in solution, the fabricated material visually transitioned from faint brownish pink to green by the complexation mechanism. Additionally, the transparency of this probe allowed the quantitative spectrophotometric determination of the Hg2+ concentration in aqueous samples. It was also shown that the material is highly stable, which can be reused for more than 50 times without significant decline in its performance, hence, making it suitable for the onsite monitoring of mercuric ion contamination in different bodies of water.
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Affiliation(s)
- Eduardo
C. Atayde
- Molecular
Science and Technology Program, Taiwan International
Graduate Program, Academia Sinica, No. 128, Sec. 2, Academia Road, Taipei 11529, Taiwan
- Department
of Chemistry, National Tsing Hua University, No. 101 Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
- Department
of Chemical Engineering, National Taiwan
University, No. 1, Sec.
4, Roosevelt Road, Taipei 10617, Taiwan
- Bioplastic
Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yasumasa Takenaka
- Bioplastic
Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hideki Abe
- Bioplastic
Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ming-Rou Wu
- Department
of Chemical Engineering, National Taiwan
University, No. 1, Sec.
4, Roosevelt Road, Taipei 10617, Taiwan
| | - Kevin C.-W. Wu
- Molecular
Science and Technology Program, Taiwan International
Graduate Program, Academia Sinica, No. 128, Sec. 2, Academia Road, Taipei 11529, Taiwan
- Department
of Chemical Engineering, National Taiwan
University, No. 1, Sec.
4, Roosevelt Road, Taipei 10617, Taiwan
- Department
of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuandong Rd., Zhongli District, Taoyuan 32003, Taiwan
- Department
of Chemical Engineering, Chung Yuan Christian
University, No. 200,
Zhongbei Rd., Zhongli Dist., Taoyuan 320, Taiwan
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2
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Kováčová M, Bodnár Yankovych H, Augustyniak A, Casas-Luna M, Remešová M, Findoráková L, Stahorský M, Čelko L, Baláž M. Triggering antibacterial activity of a common plant by biosorption of selected heavy metals. J Biol Inorg Chem 2024; 29:201-216. [PMID: 38587623 PMCID: PMC11098919 DOI: 10.1007/s00775-024-02045-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 01/22/2024] [Indexed: 04/09/2024]
Abstract
The presented study proposes an efficient utilization of a common Thymus serpyllum L. (wild thyme) plant as a highly potent biosorbent of Cu(II) and Pb(II) ions and the efficient interaction of the copper-laden plant with two opportunistic bacteria. Apart from biochars that are commonly used for adsorption, here we report the direct use of native plant, which is potentially interesting also for soil remediation. The highest adsorption capacity for Cu(II) and Pb(II) ions (qe = 12.66 and 53.13 mg g-1, respectively) was achieved after 10 and 30 min of adsorption, respectively. Moreover, the Cu-laden plant was shown to be an efficient antibacterial agent against the bacteria Escherichia coli and Staphylococcus aureus, the results being slightly better in the former case. Such an activity is enabled only via the interaction of the adsorbed ions effectively distributed within the biological matrix of the plant with bacterial cells. Thus, the sustainable resource can be used both for the treatment of wastewater and, after an effective embedment of metal ions, for the fight against microbes.
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Affiliation(s)
- Mária Kováčová
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovakia
| | - Halyna Bodnár Yankovych
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovakia
| | - Adrian Augustyniak
- Chair of Building Materials and Construction Chemistry, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355, Berlin, Germany
- Faculty of Chemical Technology and Engineering, The West Pomeranian University of Technology in Szczecin, Piastów Avenue 42, 71 065, Szczecin, Poland
- Institute of Biology, University of Szczecin, ul. Wąska 13, 71-415, Szczecin, Poland
| | - Mariano Casas-Luna
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
| | - Michaela Remešová
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Lenka Findoráková
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovakia
| | - Martin Stahorský
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovakia
| | - Ladislav Čelko
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Matej Baláž
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovakia.
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3
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Mohseni N, Moodi M, Kefayat A, Shokati F, Molaabasi F. Challenges and Opportunities of Using Fluorescent Metal Nanocluster-Based Colorimetric Assays in Medicine. ACS OMEGA 2024; 9:3143-3163. [PMID: 38284078 PMCID: PMC10809695 DOI: 10.1021/acsomega.3c06884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/27/2023] [Accepted: 12/14/2023] [Indexed: 01/30/2024]
Abstract
Development of rapid colorimetric methods based on novel optical-active metal nanomaterials has provided methods for the detection of ions, biomarkers, cancers, etc. Fluorescent metal nanoclusters (FMNCs) have gained a lot of attention due to their unique physical, chemical, and optical properties providing numerous applications from rapid and sensitive detection to cellular imaging. However, because of very small color changes, their colorimetric applications for developing rapid tests based on the naked eye or simple UV-vis absorption spectrophotometry are still limited. FMNCs with peroxidase-like activity have significant potential in a wide variety of applications, especially for point-of-care diagnostics. In this review, the effect of using various capping agents and metals for the preparation of nanoclusters in their colorimetric sensing properties is explored, and the synthesis and detection mechanisms and the recent advances in their application for ultrasensitive chemical and biological analysis regarding human health are highlighted. Finally, the challenges that remain as well as the future perspectives are briefly discussed. Overcoming these limitations will allow us to expand the nanocluster's application for colorimetric diagnostic purposes in medical practice.
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Affiliation(s)
- Nasim Mohseni
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Mohammad Moodi
- Department
of Materials Science and Engineering, Ferdowsi
University of Mashhad, Mashhad, Iran
| | - Amirhosein Kefayat
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
- Department
of Oncology, Isfahan University of Medical
Sciences, Isfahan, Iran
| | - Farhad Shokati
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Fatemeh Molaabasi
- Biomaterials
and Tissue Engineering Research Group, Department of Interdisciplinary
Technologies, Breast Cancer Research Center,
Motamed Cancer Institute, ACECR, Tehran, Iran
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4
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Zhang C, Liang M, Shao C, Li Z, Cao X, Wang Y, Wu Y, Lu S. Visual Detection and Sensing of Mercury Ions and Glutathione Using Fluorescent Copper Nanoclusters. ACS APPLIED BIO MATERIALS 2023; 6:1283-1293. [PMID: 36788220 DOI: 10.1021/acsabm.3c00031] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Visual detection of mercury ions and glutathione is of great significance to public health and environmental issues. Herein, we developed a fluorescent sensor (l-Cys/CuNCs@ESM) based on the eggshell membrane (ESM) and red-emitting copper nanoclusters (CuNCs) by the in situ strategy via l-cysteine (l-Cys) as the reducing and protective agent for mercury ions and glutathione sensing visually. The as-prepared fluorescent product had good stability, portability, large Stokes shift (250 nm), and long fluorescence lifetime (7.3 μs). Notably, the l-Cys/CuNCs@ESM exhibited a specific fluorescence quenching response toward Hg2+. Moreover, the interaction between glutathione (GSH) and Hg2+ could subsequently recover the fluorescence effectively. Inspired by this "on-off-on" switch, the l-Cys/CuNCs@ESM was applied as the dual-sensing system for visual detection of mercury ions and glutathione integrating with the portable smartphone. The limit of detection (LOD) of Hg2+ is 1.1 μM for visualization and 0.52 μM for the fluorescence spectrometer. The corresponding LODs of GSH are 2.8 and 0.59 μM, respectively. This platform presents significant sensitivity, specificity, and stability, offering a promising potential for real-time/on-site sensing.
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Affiliation(s)
- Cheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Mengna Liang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Congying Shao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Ziwei Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Xue Cao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Yongxiang Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Yanan Wu
- School of Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, U.K
| | - Shun Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, South Dakota 57007, United States
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5
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Zhang L, Liu X, Mao Y, Rong S, Chen Y, Qi Y, Cai Z, Li H. Inhibition of melanoma using a nanoceria-based prolonged oxygen-generating phototherapy hydrogel. Front Oncol 2023; 13:1126094. [PMID: 37007107 PMCID: PMC10060878 DOI: 10.3389/fonc.2023.1126094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 01/23/2023] [Indexed: 03/18/2023] Open
Abstract
Tumor hypoxic environment is an inevitable obstacle for photodynamic therapy (PDT) of melanoma. Herein, a multifunctional oxygen-generating hydrogel loaded with hyaluronic acid-chlorin e6 modified nanoceria and calcium peroxide (Gel-HCeC-CaO2) was developed for the phototherapy of melanoma. The thermo-sensitive hydrogel could act as a sustained drug delivery system to accumulate photosensitizers (chlorin e6, Ce6) around the tumor, followed by cellular uptake mediated by nanocarrier and hyaluronic acid (HA) targeting. The moderate sustained oxygen generation in the hydrogel was produced by the reaction of calcium peroxide (CaO2) with infiltrated H2O in the presence of catalase mimetic nanoceria. The developed Gel-HCeC-CaO2 could efficiently alleviate the hypoxia microenvironment of tumors as indicated by the expression of hypoxia-inducible factor -1α (HIF-1α), meeting the “once injection, repeat irradiation” strategy and enhanced PDT efficacy. The prolonged oxygen-generating phototherapy hydrogel system provided a new strategy for tumor hypoxia alleviation and PDT.
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Affiliation(s)
- Lidong Zhang
- Institute of Military Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiaoguang Liu
- Department of Gynecology, Women’s Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing, China
| | - Yinghua Mao
- Centre for Diseases Prevention and Control of Eastern Theater, Nanjing, China
| | - Shu Rong
- Centre for Diseases Prevention and Control of Eastern Theater, Nanjing, China
| | - Yonghong Chen
- Centre for Diseases Prevention and Control of Eastern Theater, Nanjing, China
| | - Yong Qi
- Huadong Research Institute for Medicine and Biotechniques, Nanjing, China
| | - Zhipeng Cai
- Centre for Diseases Prevention and Control of Eastern Theater, Nanjing, China
| | - Hong Li
- Centre for Diseases Prevention and Control of Eastern Theater, Nanjing, China
- *Correspondence: Hong Li,
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6
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Alula MT, Madingwane ML, Yan H, Lemmens P, Zhe L, Etzkorn M. Biosynthesis of bifunctional silver nanoparticles for catalytic reduction of organic pollutants and optical monitoring of mercury (II) ions using their oxidase-mimic activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81938-81953. [PMID: 35739451 DOI: 10.1007/s11356-022-21619-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/18/2022] [Indexed: 06/15/2023]
Abstract
In this study, an aqueous extract of Sclerocarya birrea leaves was used as a reducing agent to synthesize silver nanoparticles (AgNPs). The synthesis was carried out at room temperature and was both rapid and simple. Different characterization techniques such as UV/visible spectroscopy, surface-enhanced Raman spectroscopy, X-ray diffraction, and focused ion beam scanning electron microscopy were used to confirm the formation of AgNPs. The synthesized nanoparticles exhibited catalytic activity for the reduction of 4-nitrophenol, methyl orange, methylene blue, and rhodamine 6G. The catalytic activity was monitored by measuring the UV/visible absorbance spectra of the compounds using sodium borohydride as a reducing agent and found to be high. Additionally, the particles displayed oxidase-like activity. In the presence of AgNPs, 3, 3', 5, 5'-tetramethylbenzidine (TMB) which is colorless was transformed to oxidized TMB, which is blue, using dissolved oxygen as the oxidant. In the presence of Hg2+, the oxidase-like activity was enhanced. On the basis of this observation, an assay for the analysis of Hg2+ was developed. The linear range of the calibration curve is wide (0-600 µM) and the limit of detection (LOD) is low, as small as 34.8 nM. The method is strongly selective towards Hg2+. Tap water obtained from the laboratory where these experiments were carried out was used to study the feasibility of the method in real sample analyses.
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Affiliation(s)
- Melisew Tadele Alula
- Department of Chemical and Forensic Sciences, Faculty of Science, Botswana International University of Science and Technology, Plot 10071, Private Bag 16, Palapye, Botswana.
| | - Mildred Lesang Madingwane
- Department of Chemical and Forensic Sciences, Faculty of Science, Botswana International University of Science and Technology, Plot 10071, Private Bag 16, Palapye, Botswana
| | - Hongdan Yan
- Institute for Condensed Matter Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Peter Lemmens
- Institute for Condensed Matter Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Liu Zhe
- Institute Applied Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Markus Etzkorn
- Institute Applied Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
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7
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Joshi DJ, Lalrinhlupuii, Malek NI, Muthukumaran RB, Kailasa SK. Microwave-Assisted Synthesis of Red Emitting Copper Nanoclusters Using Trypsin as a Ligand for Sensing of Pb 2+ And Hg 2+ Ions in Water and Tobacco Samples. APPLIED SPECTROSCOPY 2022; 76:1234-1245. [PMID: 35477299 DOI: 10.1177/00037028221100544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, a microwave assisted method was developed for synthesis of red fluorescent copper nanoclusters (NCs) using trypsin as a template (trypsin-Cu). The as-synthesized trypsin-Cu NCs are stable and water soluble, exhibiting fluorescence emission at 657 nm when excited at 490 nm. The as-prepared red-emitting trypsin-Cu NCs were characterized by using several analytical techniques such as ultraviolet-visible (UV-Vis) and fluorescence, fluorescence lifetime, Fourier transform infrared, and X-ray photoelectron spectroscopic techniques. Red-emitting trypsin-Cu NCs acted as a nanosensor for sensing both Pb2+ and Hg2+ ions through fluorescence quenching. Using this approach, good linearities are observed in the range of 0.1-25 and of 0.001-1 μM with the lower limit of detection of 14.63 and 56.81 nM for Pb2+ and Hg2+ ions, respectively. Trypsin-Cu NCs-based fluorescence assay was successfully applied to detect both Hg2+ and Pb2+ ions in water and tobacco samples.
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Affiliation(s)
- Dharaben J Joshi
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | - Lalrinhlupuii
- Department of Chemistry, 29670Mizoram University, Aizawl, India
| | - Naved I Malek
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
| | | | - Suresh Kumar Kailasa
- Department of Chemistry, 123518Sardar Vallabhbhai National Institute of Technology, Surat, India
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8
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Hyder A, Buledi JA, Nawaz M, Rajpar DB, Shah ZUH, Orooji Y, Yola ML, Karimi-Maleh H, Lin H, Solangi AR. Identification of heavy metal ions from aqueous environment through gold, Silver and Copper Nanoparticles: An excellent colorimetric approach. ENVIRONMENTAL RESEARCH 2022; 205:112475. [PMID: 34863692 DOI: 10.1016/j.envres.2021.112475] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/01/2021] [Accepted: 11/24/2021] [Indexed: 05/25/2023]
Abstract
Heavy metal pollution has become a severe threat to human health and the environment for many years. Their extensive release can severely damage the environment and promote the generation of many harmful diseases of public health concerns. These toxic heavy metals can cause many health problems such as brain damage, kidney failure, immune system disorder, muscle weakness, paralysis of the limbs, cardio complaint, nervous system. For many years, researchers focus on developing specific reliable analytical methods for the determination of heavy metal ions and preventing their acute toxicity to a significant extent. The modern researchers intended to utilize efficient and discerning materials, e.g. nanomaterials, especially the metal nanoparticles to detect heavy metal ions from different real sources rapidly. The metal nanoparticles have been broadly utilized as a sensing material for the colorimetric detection of toxic metal ions. The metal nanoparticles such as Gold (Au), Silver (Ag), and Copper (Cu) exhibited localized plasmon surface resonance (LPSR) properties which adds an outstanding contribution to the colorimetric sensing field. Though, the stability of metal nanoparticles was major issue to be exploited colorimetric sensing of heavy emtal ions, but from last decade different capping and stabilizing agents such as amino acids, vitmains, acids and ploymers were used to functionalize the metal surface of metal nanoparticles. These capping agents prevent the agglomeration of nanoparticles and make them more active for prolong period of time. This review covers a comprehensive work carried out for colorimetric detection of heavy metals based on metal nanoparticles from the year 2014 to onwards.
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Affiliation(s)
- Ali Hyder
- National Centre of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan
| | - Jamil A Buledi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan
| | - Muhammad Nawaz
- National Centre of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan
| | - Dhani B Rajpar
- National Centre of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan
| | - Zia-Ul-Hassan Shah
- Department of Soil Science, Sindh Agriculture University, Tandojam, Pakistan
| | - Yasin Orooji
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, PR China.
| | - Mehmet Lütfi Yola
- Hasan Kalyoncu University, Faculty of Health Sciences, Department of Nutrition and Dietetics, Gaziantep, Turkey
| | - Hassan Karimi-Maleh
- Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran.
| | - Hongjun Lin
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, PR China
| | - Amber R Solangi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan.
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9
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Rapid color-fading colorimetric sensing of Hg in environmental samples: regulation mechanism from DNA dimension. Mikrochim Acta 2022; 189:76. [PMID: 35091871 DOI: 10.1007/s00604-022-05177-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 01/05/2022] [Indexed: 12/23/2022]
Abstract
It was found that dimension change of aptamer DNA significantly weakened the mimicking activity of gold nanozyme, which was contrary to previous research. Based on this, a rapid colorimetric method for the detection of low concentrations of mercury in environmental media was fabricated. It was observed that 40 nM Hg2+ causes color changes in solution. The detection limit of absorbance measurements was estimated to be 9.3 × 10-11 M. The assay was fast and could complete a single test in half an hour. The detection results for real environment samples confirmed the reliability of the colorimetric analysis in practical application. The proposed assay provides an alternative method for real-time monitoring of mercury in the environment. In particular, the charge effect on the affinity of nanozyme consummated the DNA regulation mechanism for the simulated enzyme activity.
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10
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Xue Y, Cheng Z, Luo M, Hu H, Xia C. Synthesis of Copper Nanocluster and Its Application in Pollutant Analysis. BIOSENSORS 2021; 11:424. [PMID: 34821639 PMCID: PMC8615659 DOI: 10.3390/bios11110424] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 05/09/2023]
Abstract
Copper nanoclusters (Cu NCs) with their inherent optical and chemical advantages have gained increasing attention as a kind of novel material that possesses great potential, primarily in the use of contaminants sensing and bio-imaging. With a focus on environmental safety, this article comprehensively reviews the recent advances of Cu NCs in the application of various contaminants, including pesticide residues, heavy metal ions, sulfide ions and nitroaromatics. The common preparation methods and sensing mechanisms are summarized. The typical high-quality sensing probes based on Cu NCs towards various target contaminants are presented; additionally, the challenges and future perspectives in the development and application of Cu NCs in monitoring and analyzing environmental pollutants are discussed.
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Affiliation(s)
- Yan Xue
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; (Y.X.); (Z.C.); (M.L.)
| | - Zehua Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; (Y.X.); (Z.C.); (M.L.)
| | - Mai Luo
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; (Y.X.); (Z.C.); (M.L.)
| | - Hao Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; (Y.X.); (Z.C.); (M.L.)
| | - Chenglai Xia
- Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University, Foshan 528000, China
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510150, China
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11
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Baghdasaryan A, Bürgi T. Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications. NANOSCALE 2021; 13:6283-6340. [PMID: 33885518 DOI: 10.1039/d0nr08489a] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Atomically precise metal nanoclusters (MNCs) have gained tremendous research interest in recent years due to their extraordinary properties. The molecular-like properties that originate from the quantized electronic states provide novel opportunities for the construction of unique nanomaterials possessing rich molecular-like absorption, luminescence, and magnetic properties. The field of monolayer-protected metal nanoclusters, especially copper, with well-defined molecular structures and compositions, is relatively new, about two to three decades old. Nevertheless, the massive progress in the field illustrates the importance of such nanoobjects as promising materials for various applications. In this respect, nanocluster-based catalysts have become very popular, showing high efficiencies and activities for the catalytic conversion of chemical compounds. Biomedical applications of clusters are an active research field aimed at finding better fluorescent contrast agents, therapeutic pharmaceuticals for the treatment and prevention of diseases, the early diagnosis of cancers and other potent diseases, especially at early stages. A huge library of structures and the compositions of copper nanoclusters (CuNCs) with atomic precisions have already been discovered during last few decades; however, there are many concerns to be addressed and questions to be answered. Hopefully, in future, with the combined efforts of material scientists, inorganic chemists, and computational scientists, a thorough understanding of the unique molecular-like properties of metal nanoclusters will be achieved. This, on the other hand, will allow the interdisciplinary researchers to design novel catalysts, biosensors, or therapeutic agents using highly structured, atomically precise, and stable CuNCs. Thus, we hope this review will guide the reader through the field of CuNCs, while discussing the main achievements and improvements, along with challenges and drawbacks that one needs to face and overcome.
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Affiliation(s)
- Ani Baghdasaryan
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland.
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12
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A Review on Recent Developments and Applications of Nanozymes in Food Safety and Quality Analysis. FOOD ANAL METHOD 2021. [DOI: 10.1007/s12161-021-01983-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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MU J, YANG JL, ZHANG DW, JIA Q. Progress in Preparation of Metal Nanoclusters and Their Application in Detection of Environmental Pollutants. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2021. [DOI: 10.1016/s1872-2040(21)60082-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Wong ELS, Vuong KQ, Chow E. Nanozymes for Environmental Pollutant Monitoring and Remediation. SENSORS (BASEL, SWITZERLAND) 2021; 21:E408. [PMID: 33430087 PMCID: PMC7827938 DOI: 10.3390/s21020408] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/03/2021] [Accepted: 01/06/2021] [Indexed: 12/20/2022]
Abstract
Nanozymes are advanced nanomaterials which mimic natural enzymes by exhibiting enzyme-like properties. As nanozymes offer better structural stability over their respective natural enzymes, they are ideal candidates for real-time and/or remote environmental pollutant monitoring and remediation. In this review, we classify nanozymes into four types depending on their enzyme-mimicking behaviour (active metal centre mimic, functional mimic, nanocomposite or 3D structural mimic) and offer mechanistic insights into the nature of their catalytic activity. Following this, we discuss the current environmental translation of nanozymes into a powerful sensing or remediation tool through inventive nano-architectural design of nanozymes and their transduction methodologies. Here, we focus on recent developments in nanozymes for the detection of heavy metal ions, pesticides and other organic pollutants, emphasising optical methods and a few electrochemical techniques. Strategies to remediate persistent organic pollutants such as pesticides, phenols, antibiotics and textile dyes are included. We conclude with a discussion on the practical deployment of these nanozymes in terms of their effectiveness, reusability, real-time in-field application, commercial production and regulatory considerations.
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Affiliation(s)
| | | | - Edith Chow
- Aperture, Ryde, NSW 2112, Australia; (E.L.S.W.); (K.Q.V.)
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Unnikrishnan B, Lien CW, Chu HW, Huang CC. A review on metal nanozyme-based sensing of heavy metal ions: Challenges and future perspectives. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123397. [PMID: 32659586 DOI: 10.1016/j.jhazmat.2020.123397] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/30/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Large scale mining, manufacturing industries, exploitation of underground water, depletion of groundwater level, and uncontrolled discharge of industrial wastes have caused severe heavy metal ion pollution to the environment throughout the world. Therefore, the rapid detection of such toxic metal ions is inevitable. However, conventional methods require sophisticated instruments and skilled manpower and are difficult to operate in on-field conditions. Recently, metal nanozyme-based assays have been found to have the potential as an alternative to conventional methods due to their portability, simplicity, and high sensitivity to detect metal ion concentration to as low as parts per trillion (ppt). Metal nanozyme-based systems for heavy metal ions enable rapid and cheap screening on the spot with a very simple instrument such as a UV-vis absorption spectrophotometer and therefore, are convenient for use in field operations, especially in remote parts of the world. The sensing mechanism of a nanozyme-based sensor is highly dependent on its surface properties and specific interactions with particular metal ion species. Such method often encounters selectivity issues, unlike natural enzyme-based assays. Therefore, in this review, we mainly focus our discussion on different types of target recognition and inhibition/enhancement mechanisms, and their responses toward the catalytic activity in the sensing of target metal ions, design strategies, challenges, and future perspectives.
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Affiliation(s)
- Binesh Unnikrishnan
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan
| | - Chia-Wen Lien
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan
| | - Han-Wei Chu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan
| | - Chih-Ching Huang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
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Jiao M, Li Y, Jia Y, Xu L, Xu G, Guo Y, Luo X. Ligand-modulated aqueous synthesis of color-tunable copper nanoclusters for the photoluminescent assay of Hg(II). Mikrochim Acta 2020; 187:545. [PMID: 32886171 DOI: 10.1007/s00604-020-04539-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 08/28/2020] [Indexed: 10/23/2022]
Abstract
Water-soluble Cu nanoclusters (NCs) with tunable emission were synthesized through an eco-friendly one-pot aqueous method. Blue-, green-, and red-emitting NCs with the emission peaks at 420 nm, 505 nm, and 630 nm were obtained by employing ethanediamine, cysteine, and glutathione as surface ligands, respectively. The ligand effects on the optical properties of Cu NCs were studied by the single variable method. It has been revealed by systematic characterizations that the dependence of emission color on the structures of ligands was mainly attributed to their different size-tuning effects. Glutathione has the strongest chelating ability and it can significantly reduce the monomer reactivity and thus decrease the supersaturation degree of the reaction, which is favorable for modulating Cu precursor to grow into larger NCs. In contrast, ethanediamine ligand resulted in smaller nanoclusters due to its weaker binding capability. Because of the strong emission and terrific fluorescent stability, Cu NCs capped with ethanediamine, possessing an emission peak at 420 nm when excited at a wavelength of 350 nm, were directly used for probing Hg(II) with satisfying selectivity, presenting a linear range of 0.1-5.0 mM and a detection limit of 33 μM. The sensor showed good performance in real sample analysis with recoveries ranging from 99% to 103%, and comparable accuracy with atomic fluorescence spectroscopy, manifesting the reliability of the current strategy for sensing Hg(II). Graphical abstract Water-soluble copper nanoclusters with blue, green, and red emissions were synthesized by employing ethanediamine, cysteine, and glutathione as surface ligands respectively, and the blue-emitting nanoclusters with strong emission and terrific stability were directly used for selectively sensing Hg2+.
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Affiliation(s)
- Mingxia Jiao
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Yun Li
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Yuxiu Jia
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Le Xu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Guiyun Xu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Yingshu Guo
- Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Province Key Laboratory of Detection Technology for Tumor Markers, School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276005, China.
| | - Xiliang Luo
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
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Tang Y, Hu Y, Yang Y, Liu B, Wu Y. A facile colorimetric sensor for ultrasensitive and selective detection of Lead(II) in environmental and biological samples based on intrinsic peroxidase-mimic activity of WS2 nanosheets. Anal Chim Acta 2020; 1106:115-125. [DOI: 10.1016/j.aca.2020.01.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 01/20/2020] [Indexed: 01/10/2023]
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Colorimetric determination of Pb 2+ ions based on surface leaching of Au@Pt nanoparticles as peroxidase mimic. Mikrochim Acta 2020; 187:255. [PMID: 32239351 DOI: 10.1007/s00604-020-04234-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 03/24/2020] [Indexed: 12/17/2022]
Abstract
We report the first use of metallic nanozyme as colorimetric probe for Pb2+ determination. The method is based on the surface leaching of Au@PtNP nanozyme by Pb2+-S2O32- ions, accompanied by a decreased catalytic activity of the metallic nanozyme. To construct this colorimetric determination, the Pt deposition onto the AuNPs was carefully investigated and other experimental factors including kind of substrate and buffer were optimized. With increasing Pb2+ concentration, the catalytic activity of the Au@PtNPs decreased gradually. As a result, the blue color at 650 nm from the oxidation of 3,3',5,5'-tetramethylbenzidine by H2O2 faded gradually. A determination limit of 3.0 nM Pb2+ with a linear range from 20 to 800 nM was obtained. The assay demonstrated negligible response to common metal ions even at elevated concentrations. This colorimetric method was applied to the determination of Pb2+ ions spiked in lake water samples, and good recoveries (96.8-105.2%) were obtained. The above results indicate the potential application of metallic nanozymes in developing robust colorimetric assays. Graphical abstract Schematic representation of the surface leaching of Au@PtNP nanozyme by Pb2+-S2O32- ions, accompanying the decreased catalytic activity of the metallic nanozyme.
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Wang J, Wang J, Zhou P, Tao H, Wang X, Wu Y. Oligonucleotide-induced regulation of the oxidase-mimicking activity of octahedral Mn 3O 4 nanoparticles for colorimetric detection of heavy metals. Mikrochim Acta 2020; 187:99. [PMID: 31912245 DOI: 10.1007/s00604-019-4069-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/06/2019] [Indexed: 11/24/2022]
Abstract
A colorimetric assay for the determination of heavy metal ions is presented that is based on the regulation of the oxidase-mimicking activity of Mn3O4 nanoparticles (NPs) by oligonucleotides. The chromogenic agent tetramethylbenzidine (TMB) is oxidized by the catalytic action of Mn3O4 NPs to generate products that have a yellow color in acidic solution, with a peak at 450 nm. It is found that random oligonucleotides are absorbed on the regular surface of the Mn3O4 NPs and temporarily inhibit the oxidation of TMB. This leads to a decrease in absorbance and a light-green coloration of the solution. The results show that the purine bases in oligonucleotides play a key role in their regulation of the activity of the NPs. The regulatory effect is assumed to be of the noncompetitive type. In the presence of heavy metal ions like Hg(II) or Cd(II), the inhibition is canceled due to the binding of heavy metal ions to thymine bases, and the color of the solution changes from light green to yellow. The increase in absorbance at 450 nm is related to the amount of heavy metal ions present. The method allows Hg(II) and Cd(II) to be determined visually in concentrations as low as 20 μg·L-1. The detection limit of the colorimetric assay is 3.8 and 2.4 μg·L-1 of Hg(II) and Cd(II), respectively. The assay displays good selectivity over other heavy metal ions. The method was successfully validated by analyzing several water samples. Graphical abstract Schematic representation of the colorimetric assay for Hg(II) and Cd(II) based on the intrinsic oxidase-mimicking activity of Mn3O4 nanoparticles that is regulated by oligonucleotides.
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Affiliation(s)
- Jiajia Wang
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Huaxi District, Guiyang, 550025, Guizhou Province, China
| | - Jinlong Wang
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Huaxi District, Guiyang, 550025, Guizhou Province, China
| | - Pei Zhou
- Key Laboratory of Urban Agriculture Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Han Tao
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Huaxi District, Guiyang, 550025, Guizhou Province, China
| | - Xueli Wang
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Huaxi District, Guiyang, 550025, Guizhou Province, China
| | - Yuangen Wu
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Huaxi District, Guiyang, 550025, Guizhou Province, China. .,Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry, Cuiping District, Sichuan Province, Yibin, 644000, China.
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Unnikrishnan B, Lien CW, Huang CC. RETRACTED ARTICLE: Nanozyme Based Detection of Heavy Metal Ions and its Challenges: A Minireview. JOURNAL OF ANALYSIS AND TESTING 2019. [DOI: 10.1007/s41664-019-00110-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Ma X, Wang Z, He S, Zhao J, Lai X, Xu J. L-Cysteine modified gold nanoparticles for tube-based fluorometric determination of mercury(II) ions. Mikrochim Acta 2019; 186:632. [PMID: 31422480 DOI: 10.1007/s00604-019-3734-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 08/01/2019] [Indexed: 12/16/2022]
Abstract
A fluorescent probe is described for detection of mercury(II) ion by using L-cysteine-modified gold nanoparticles (Cys-AuNP). These were fabricated by a tube-based redox reaction where Cys acts as both the reducing reagent and capping ligand. The Cys-AuNP display red fluorescence, with excitation/emission peaks at 373/625 nm. Owing to the high-affinity of the Hg(II)-Au(I) interaction and the Hg(II)/carboxy or amino group interaction, the presence of Hg(II) cause selective quenching the fluorescence, while other metal ions do not give such an effect. Based on these findings, a method was designed for the determination of Hg(II) that has attractive figures of merit. These include a low limit of detection (1.3 nM), a wide detection range (from 2 nM to 30µM), and excellent specificity. The method was applied to Hg(II) screening in (spiked) tap and river water, and it gave satisfactory results. Graphical abstract Schematic representation of the application of L-cysteine modified gold nanoparticles (Cys-AuNP) for qualitative and quantitative detection of mercury(II) ions. Based on the interaction between Cys-AuNP and mercury(II) ion to quench the red fluorescence of Cys-AuNP, the target mercury(II) can in turn be determined by a fluorometric method.
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Affiliation(s)
- Xiaoming Ma
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, People's Republic of China
| | - Zhen Wang
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, People's Republic of China
| | - Shan He
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, People's Republic of China
| | - Jingyi Zhao
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, People's Republic of China
| | - Xiaoqi Lai
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, People's Republic of China.
| | - Jianguo Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China. .,State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, People's Republic of China.
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A CuO-CeO2 composite prepared by calcination of a bimetallic metal-organic framework for use in an enzyme-free electrochemical inhibition assay for malathion. Mikrochim Acta 2019; 186:567. [DOI: 10.1007/s00604-019-3684-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 07/07/2019] [Indexed: 12/11/2022]
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