1
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Chung SWC. Update on chromium speciation analysis in foods: a review of advances in analytical methods and dietary exposure assessment. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2024; 41:782-789. [PMID: 38728540 DOI: 10.1080/19440049.2024.2352858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Abstract
Chromium occurs naturally in different oxidation states. Amongst them, hexavalent chromium is classified as both genotoxic and carcinogenic while trivalent chromium can be considered as an essential element. Therefore, speciation analysis is essential when conducting dietary exposure assessment. Several critical reviews have been published on chromium speciation analysis in foodstuffs in the last decade. However, a method that can account for species interconversion during the extraction procedure has not been reported in the reviews. In recent years, an online method using species-specific isotope dilution mass spectrometry has been developed for the simultaneous determination of trivalent and hexavalent chromium in foodstuffs. Apart from that, new methods based on offline analytical techniques, to analyse trivalent and hexavalent chromium separately, are still under development. Therefore, one of the objectives of this paper is to review these recently published analytical methods and assess whether they are fit for chromium speciation analysis in foodstuffs. Additionally, an objective is also to assess whether their limits of detection are sufficiently low for dietary exposure assessment with respect to the neoplastic effects of hexavalent chromium. Moreover, possible future research gaps are identified based on the current knowledge and existing literature.
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Affiliation(s)
- Stephen W C Chung
- Independent Researcher, Hong Kong, China
- Formerly with the Food Research Laboratory, Centre for Food Safety, Hong Kong, China
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2
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Rasheed T, Ahmad T, Khan S, Ferry DB, Sher F, Ali A, Majeed S. Graphitic carbon nitride derived probes for the recognition of heavy metal pollutants of environmental concern in water bodies. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1142. [PMID: 37665398 DOI: 10.1007/s10661-023-11792-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
Graphitic carbon nitride (g-CN) has a number of valuable features that have been recognized during the studies related to its photocatalytic activity enhancement derived by visible light. Because of these characteristics, g-CN can be used as a detecting signal transducer with different transmission modalities. The latest up-to-date detection capabilities of modified g-CN nanoarchitectures are covered in this study. The structural features and synthetic methodologies have been discussed in a number of reports. Herein, employment of the g-CN as a promising probing modality for the recognition of different toxic heavy metals is the promising feature of the present study.
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Affiliation(s)
- Tahir Rasheed
- Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals (KFUPM), 31261, Dhahran, Saudi Arabia.
| | - Tauqir Ahmad
- Center for Advanced Specialty Chemicals, Korea Research, Institute of Chemical Technology (KRICT) , Ulsan, 44412, Republic of Korea
| | - Sardaraz Khan
- Chemistry Department, King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia
| | - Darim Badur Ferry
- Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals (KFUPM), 31261, Dhahran, Saudi Arabia
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Amjad Ali
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006, Katowice, Poland
| | - Saadat Majeed
- Division of Analytical Chemistry, Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan.
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3
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Hu L, Shi T, Chen J, Cui Q, Yu H, Wu D, Ma H, Wei Q, Ju H. Dual-quenching electrochemiluminescence resonance energy transfer system from CoPd nanoparticles enhanced porous g-C 3N 4 to FeMOFs-sCuO for neuron-specific enolase immunosensing. Biosens Bioelectron 2023; 226:115132. [PMID: 36791617 DOI: 10.1016/j.bios.2023.115132] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 02/02/2023] [Accepted: 02/05/2023] [Indexed: 02/09/2023]
Abstract
For the diagnosis and therapy of small cell lung cancer (SCLC), the accurate and sensitive determination of neuron-specific enolase (NSE) content is crucial. This work outlines a dual-quenching electrochemiluminescence resonance energy transfer (ECL-RET) immunosensor based on the double quenching effects of iron base metal organic frameworks (FeMOFs) loaded with small sized CuO nanoparticles (FeMOFs-sCuO) towards CoPd nanoparticles (CoPdNPs) enhanced porous g-C3N4 (P-C3N4-CoPdNPs). To be specific, we prepared a porous g-C3N4 (P-C3N4) which has a rich porous structure, and significantly increased the specific surface area and the number of reaction sites of P-C3N4. Meanwhile, the CoPdNPs were loaded onto P-C3N4 to improve the ECL luminescence property of P-C3N4/K2S2O8 system through acting as a coreaction accelerator. In addition, the ultraviolet-visible (UV-vis) absorption spectra of FeMOFs and small sized CuO nanoparticles (sCuO) showed considerable overlap with the ECL emission spectra of P-C3N4 appropriately. Therefore, FeMOFs with high specific surface area were prepared and well combined with sCuO to effectively dual-quenching the ECL emission of P-C3N4 based on resonance energy transfer. Hence, a new type ECL-RET couple made up of P-C3N4-CoPdNPs (donor) and FeMOFs-sCuO (acceptor) were developed for the first time. A certain amount of P-C3N4-CoPdNPs, Ab1, BSA, NSE were modified layer by layer onto the electrode surface. Then FeMOFs-sCuO-Ab2 bioconjugates was incubated through the immune recognition binding. As a result, a sandwich-type ECL biosensor was manufactured successfully for NSE immunoassay. Under optimal experimental conditions, the limit of detection (LOD) and the limit of quantitation (LOQ) of the prepared ECL sensor for NSE analysis was 20.4 fg mL-1 and 7.99 fg mL-1, respectively, with the relative standard deviation (RSD) of 1.68%. The linear detection range was 0.0000500-100 ng mL-1. The studied immunosensor had satisfactory sensitivity, specificity and reproducibility, manifesting the suggested sensing strategy might offer a good technical means and theoretical basis for the sensitivity analysis of NSE and has a potential application in clinical diagnosis analysis.
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Affiliation(s)
- Lihua Hu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
| | - Tengfei Shi
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Jiye Chen
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Qianqian Cui
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Hao Yu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Dan Wu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Hongmin Ma
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Qin Wei
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Huangxian Ju
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China
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4
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Wang YZ, Hsieh TH, Huang YC, Ho KS. 2,6-Diaminopyridine-Based Polyurea as an ORR Electrocatalyst of an Anion Exchange Membrane Fuel Cell. Polymers (Basel) 2023; 15:polym15040915. [PMID: 36850199 PMCID: PMC9965045 DOI: 10.3390/polym15040915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 01/25/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
In order to yield more Co(II), 2,6-diaminopyridine (DAP) was polymerized with 4,4-methylene diphenyl diisocyanates (MDI) in the presence of Co(II) to obtain a Co-complexed polyurea (Co-PUr). The obtained Co-PUr was calcined to become Co, N-doped carbon (Co-N-C) as the cathode catalyst of an anion exchange membrane fuel cell (AEMFC). High-resolution transmission electron microscopy (HR-TEM) of Co-N-C indicated many Co-Nx (Co covalent bonding with several nitrogen) units in the Co-N-C matrix. X-ray diffraction patterns showed that carbon and cobalt crystallized in the Co-N-C catalysts. The Raman spectra showed that the carbon matrix of Co-N-C became ordered with increased calcination temperature. The surface area (dominated by micropores) of Co-N-Cs also increased with the calcination temperature. The non-precious Co-N-C demonstrated comparable electrochemical properties (oxygen reduction reaction: ORR) to commercial precious Pt/C, such as high on-set and half-wave voltages, high limited reduction current density, and lower Tafel slope. The number of electrons transferred in the cathode was close to four, indicating complete ORR. The max. power density (Pmax) of the single cell with the Co-N-C cathode catalyst demonstrated a high value of 227.7 mWcm-2.
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Affiliation(s)
- Yen-Zen Wang
- Department of Chemical and Materials Engineering, National Yu-Lin University of Science & Technology, 123, Sec. 3, University Rd., Yun-Lin 64301, Taiwan
| | - Tar-Hwa Hsieh
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan
| | - Yu-Chang Huang
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan
| | - Ko-Shan Ho
- Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan
- Correspondence:
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5
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Khan J, Sun Y, Han L. A Comprehensive Review on Graphitic Carbon Nitride for Carbon Dioxide Photoreduction. SMALL METHODS 2022; 6:e2201013. [PMID: 36336653 DOI: 10.1002/smtd.202201013] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/10/2022] [Indexed: 06/16/2023]
Abstract
Inspired by natural photosynthesis, harnessing the wide range of natural solar energy and utilizing appropriate semiconductor-based catalysts to convert carbon dioxide into beneficial energy species, for example, CO, CH4 , HCOOH, and CH3 COH have been shown to be a sustainable and more environmentally friendly approach. Graphitic carbon nitride (g-C3 N4 ) has been regarded as a highly effective photocatalyst for the CO2 reduction reaction, owing to its cost-effectiveness, high thermal and chemical stability, visible light absorption capability, and low toxicity. However, weaker electrical conductivity, fast recombination rate, smaller visible light absorption window, and reduced surface area make this catalytic material unsuitable for commercial photocatalytic applications. Therefore, certain procedures, including elemental doping, structural modulation, functional group adjustment of g-C3 N4 , the addition of metal complex motif, and others, may be used to improve its photocatalytic activity towards effective CO2 reduction. This review has investigated the scientific community's perspectives on synthetic pathways and material optimization approaches used to increase the selectivity and efficiency of the g-C3 N4 -based hybrid structures, as well as their benefits and drawbacks on photocatalytic CO2 reduction. Finally, the review concludes a comparative discussion and presents a promising picture of the future scope of the improvements.
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Affiliation(s)
- Javid Khan
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Adv. Mater. and Technology for Clean Energy, Hunan University, Changsha, 410082, China
| | - Yanyan Sun
- School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Lei Han
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Adv. Mater. and Technology for Clean Energy, Hunan University, Changsha, 410082, China
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6
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A dual-readout paper-based analytical device for the simultaneous determination of hexavalent Cr and total Cr. Mikrochim Acta 2022; 189:445. [DOI: 10.1007/s00604-022-05532-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022]
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7
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Patel MR, Kailasa SK. Carbon Nitride Nanomaterials: Properties, Synthetic Approaches and New Insights in Fluorescence Spectrometry for Assaying of Metal Ions, Organic and Biomolecules. ChemistrySelect 2022. [DOI: 10.1002/slct.202201849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mayurkumar Revabhai Patel
- Department of Chemistry Sardar Vallabhbhai National Institute of Technology Surat 395007 Gujarat India
| | - Suresh Kumar Kailasa
- Department of Chemistry Sardar Vallabhbhai National Institute of Technology Surat 395007 Gujarat India
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8
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Zheng L, Yan Y, Wang N, Li M, Shuang S, Bian W, Choi MMF. Sulfur-doped graphitic carbon nitride nanosheets as a sensitive fluorescent probe for detecting environmental and intracellular Ag. Methods Appl Fluoresc 2022; 10. [PMID: 35850115 DOI: 10.1088/2050-6120/ac8223] [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: 04/13/2022] [Accepted: 07/18/2022] [Indexed: 11/11/2022]
Abstract
Silver is widely used in medical materials, photography, electronics and other industries as a precious metal. The large-scale industrial production of silver-containing products and liquid waste emissions aggravate the environmental pollution. Silver ion is one of the most toxic metal ions, causing pollution to the environment and damage to public health. Therefore, the efficient and sensitive detection of Ag+ in the water environment is extremely important. Sulfur-doped carbon nitride nanosheets (SCN Ns) were prepared by melamine and thiourea via high-temperature calcination. The morphology, chemical composition and surface functional groups of the SCN Ns were characterized by SEM, TEM, XRD, XPS, and FT-IR. The fluorescence of SCN Ns was gradually quenched as the Ag+ concentration increased. The detection limit for Ag+ was as low as 0.28 nM. The quenching mechanism mainly is attributed to static quenching. In this paper, SCN Ns were used as the fluorescent probe for detecting Ag+. SCN Ns have successfully detected Ag+ in different environmental aqueous samples and cells. Finally, SCN Ns were further applied to the visual quantitative detection of intracellular Ag+.
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Affiliation(s)
- Lingling Zheng
- Shanxi Medical University, Shanxi Medical University, Taiyuan, Shanxi Province, China, Taiyuan, Shanxi , 030001, CHINA
| | - Yangyang Yan
- Shanxi Medical University, Shanxi Medical University, Taiyuan, Shanxi Province, China, Taiyuan, Shanxi , 030001, CHINA
| | - Ning Wang
- Shanxi Medical University, Shanxi Medical University, Taiyuan, Shanxi Province, China, Taiyuan, Shanxi , 030001, CHINA
| | - Mingli Li
- Lvliang People's Hospital, Lvliang People's Hospital, Lvliang, China, Lvliang, 033000, CHINA
| | - Shaomin Shuang
- Shanxi University, Xiaodian District, Taiyuan City, Shanxi Province, Taiyuan, Shanxi , 030006, CHINA
| | - Wei Bian
- Shanxi Medical University, Shanxi Medical University, Taiyuan, Shanxi Province, China, Taiyuan, 030001, CHINA
| | - Martin M F Choi
- c/o Tyndale Baptist Church, Bristol Chinese Christian Church, 137-139 Whiteladies Road, Bristol, BS8 2QG, United Kingdom, Clifton, Bristol, BS8 2QG, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
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9
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Rapid detection of histamine in fish based on the fluorescence characteristics of carbon nitride. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Oseghe EO, Akpotu SO, Mombeshora ET, Oladipo AO, Ombaka LM, Maria BB, Idris AO, Mamba G, Ndlwana L, Ayanda OS, Ofomaja AE, Nyamori VO, Feleni U, Nkambule TT, Msagati TA, Mamba BB, Bahnemann DW. Multi-dimensional applications of graphitic carbon nitride nanomaterials – A review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117820] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Carbon dot/carbon nitride composites fluorescent probe for the highly selective detection of Cr(VI) ions. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112711] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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12
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Shiravand G, Badiei A, Goldooz H, Karimi M, Ziarani GM, Faridbod F, Ganjali MR. A Fluorescent g-C3N4 Nanosensor for Detection of Dichromate Ions. CURR ANAL CHEM 2020; 16:593-601. [DOI: 10.2174/1573411014666180627150248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/21/2018] [Accepted: 06/18/2018] [Indexed: 01/07/2023]
Abstract
Background:
Dichromate (Cr2O7
2-) ion is one of the carcinogenic and toxic spices in
environment which can easily contaminate the environment due to its high solubility in water. Therefore,
a lot of attention has been focused on the detection of Cr2O7
2- with high sensitivity and selectivity.
Methods:
In present work, nitrogen-rich precursor was used for synthesizing graphitic carbon nitride
(g-C3N4) nanostructures through hydrothermal oxidation of g-C3N4 nanosheets. The prepared
nanostructures show two distinct fluorescence emissions centered at 368 and 450 nm which are highly
sensitive toward Cr2O7
2- ions.
Results:
The as-prepared g-C3N4 was characterized by several techniques such as Fourier-Transform
Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and
fluorescence emission spectra. The XRD pattern of prepared nanostructures illustrated two diffraction
patterns (at 13.4° and 27.6°) indicating tri-s-tri-azine-based structures. The g-C3N4 exhibited good selectivity
and sensitivity toward Cr2O7
2- among other anions. According to titration test, the detection
limit and stern-volmer constant (Ksv) were calculated as 40 nM and 0.13×106 M-1, respectively. The
investigation of quenching mechanism shows that Cr2O7
2- may form hydrogen bonding with surface
groups of g-C3N4 (such as NH2, OH and COOH) resulted in more fluorescence quenching in comparison
with the pure inner filter effect.
Conclusion:
The g-C3N4 nanostructures were successfully synthesized through the hydrothermal oxidation.
The as-prepared g-C3N4 can be used as a highly sensitive fluorescent probe for the selective
determination of Cr2O7
2 ion among other anions. The quenching mechanism was experimentally studied.
According to reliable responses in real sample tests, it can be proposed that g-C3N4 nanostructure
is a suitable sensitive nanosensor for detection of Cr2O7
2 ions in aqueous media.
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Affiliation(s)
- Ghasem Shiravand
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Alireza Badiei
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Hassan Goldooz
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mehdi Karimi
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Ghodsi M. Ziarani
- Department of Chemistry, Faculty of Science, Alzahra University, Tehran, Iran
| | - Farnoush Faridbod
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mohammad R. Ganjali
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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Shirani M, Kalantari H, Khodayar MJ, Kouchak M, Rahbar N. A novel strategy for detection of small molecules based on aptamer/gold nanoparticles/graphitic carbon nitride nanosheets as fluorescent biosensor. Talanta 2020; 219:121235. [PMID: 32887126 DOI: 10.1016/j.talanta.2020.121235] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 02/02/2023]
Abstract
Herein, a novel ultrasensitive strategy has been developed by designing a label free fluorescent nano-aptasensor for monitoring of small moecules in human plasma. In this nano-aptasensor, graphitic carbon nitride nanosheets were used as fluorescent probe. The fluorescence intensity of the probe was decreased by interaction between graphitic carbon nitride nanosheets and label-free aptamer/gold nanoparticles conjugate, via Fluorescence resonance energy transfer mechanism. Upon addition of the analyte, the fluorescence of graphitic carbon nitride nanosheets was restored due to the aptamer/analyte interaction, and the aggregation of gold nanoparticles in the presence of salt. The influence of various factors on sensing method was investigated, and under the approved conditions, the fluorescence signal showed a linear relation with Digoxin concentration in the range of 10-500 ng L-1 with limit of detection down to 3.2 ng L-1 relative standard deviations for 25, 100 and 500 ng L-1 of analyte concentrations were 2.6, 4.0 and 6.5%, respectively. This strategy provided a simple, rapid, cost effective and reproducible experimental model, with successful application for determination of Digoxin in plasma samples without any pretreatment steps.
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Affiliation(s)
- Maryam Shirani
- Toxicology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Heibatullah Kalantari
- Toxicology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Javad Khodayar
- Toxicology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Kouchak
- Nanotechnology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Pharmaceutics, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Nadereh Rahbar
- Nanotechnology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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14
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Kumar D, Arora P, Singh H, Rajput JK. Polyhydroquinoline nanoaggregates: A dual fluorescent probe for detection of 2,4,6-trinitrophenol and chromium (VI). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 230:118087. [PMID: 31986428 DOI: 10.1016/j.saa.2020.118087] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/07/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Fluorescent polyhydroquinoline (PHQ) derivative was fabricated utilizing one-pot engineered course. The PHQ derivative indicated aggregation induced emission enhancement (AIEE) with arrangement of nanoaggregates of size 11-13 nm in 95% watery DMF medium. The fluorescence emission of PHQ nanoaggregates was extinguished by including TNP and Cr (VI). They indicated prevalent fluorescence quenching towards both TNP and Cr (VI) over other meddling nitro-compounds and metal particles. In light of results got we presumed that both photo-induced fluorescence quenching of PHQ nanoaggregates by TNP, while Inner Filter Effect (IFE) was in charge of fluorescence quenching of PHQ nanoaggregates by Cr (VI). The PHQ nanoaggregates empowered identification of TNP and Cr (VI) down to 0.66 μM (TNP) and 0.28 μM (Cr (VI)). The use of PHQ nanoaggregates were reached out for location of TNP and Cr (VI) in genuine water tests.
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Affiliation(s)
- Deepak Kumar
- Department of Chemistry, Dr. B R Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India
| | - Priya Arora
- Department of Chemistry, Dr. B R Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India
| | | | - Jaspreet Kaur Rajput
- Department of Chemistry, Dr. B R Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India.
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15
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Hu Y, Zhang J, Li G, Xing H, Wu M. Highly Sensitive Fluorescent Determination of Chromium(VI) by the Encapsulation of Cadmium Telluride Quantum Dots (CdTe QDs) into Zeolitic Imidazolate Framework-8 (ZIF-8). ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1712724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yufeng Hu
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, China
| | - Junpeng Zhang
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, China
| | - Gang Li
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, China
| | - Hanwen Xing
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, China
| | - Minghuo Wu
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, China
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16
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Surface-imprinted β-cyclodextrin-functionalized carbon nitride nanosheets for fluorometric determination of sterigmatomycin. Mikrochim Acta 2019; 186:808. [PMID: 31745649 DOI: 10.1007/s00604-019-3867-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 09/20/2019] [Indexed: 10/25/2022]
Abstract
β-Cyclodextrin-functionalized carbon nitride nanosheets were modified with a molecularly imprinted polymer to obtain a fluorescent probe of type MIP@β-CD/CNNS which is shown to enable fluorometric determination of sterigmatocystin (STG). The material was characterized by transmission electron microscopy, infrared spectra, powder X-ray diffraction, X-ray photoelectron spectroscopy, and by absorption and emission spectra. The modified CNNSs have a good fluorescence quantum yield (13%), high sorption capacity for STG (86 mg·g-1), fast adsorption rate (25 min), and superior adsorption selectivity (with an imprint factor 2.56). When used as an optical probe for STG, the CNNSs act as the chromophore, while β-CD and MIP act as the recognition groups. The blue fluorescence of MIP@β-CD/CNNS (with excitation/emission maxima at 368/432 nm) is quenched by STG. Fluorescence drops linearly in the 0.15 to 3.1 μM STG concentration range. The lower detection limit is 74 nM. The method was successfully applied to the determination of STG in spiked wheat extract. Conceivably, this detection scheme based on a combination of β-CD inclusion and molecular imprinting may be extended to the detection of various other organic compounds. Graphical abstractSchematic representation of the preparation of surface-imprinted β-cyclodextrin-functionalized carbon nitride nanosheets. These are used, along with a molecularly imprinted polymer, for fluorometric determination of sterigmatomycin.
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Chromium speciation by isophthalic acid-doped polymer dots as sensitive and selective fluorescent probes. Talanta 2019; 209:120521. [PMID: 31892071 DOI: 10.1016/j.talanta.2019.120521] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 10/25/2019] [Accepted: 10/27/2019] [Indexed: 11/23/2022]
Abstract
Hexavalent chromium is a known carcinogen, among all species of chromium ions, for the respiratory tract in humans. In the present work, a new facile probe is developed for rapid and sensitive determination of Cr(VI) based on utilizing highly fluorescent conjugated poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(1,4-benzo-(2,1',3) thiadiazole)] (PFBT) polymer dots (PDs). The PDs are easily functionalized by doping of isophthalic acid (IPA) into the target PDs during a single step preparation. The prepared PDs with an average diameter of 30 nm illustrated a strong fluorescence with an emission peak centered at 530 nm (photo-excited at 480 nm). The strong fluorescence of PDs is selectively and significantly quench with Cr(VI), while it does not change by Cr(III) ion and, thus, can facilitate a chromium speciation process. The proposed mechanism is an inner filter effect (IFE) mechanism, in which the absorption bands of Cr(IV) overlaps with the emission and excitation bands of the modified PDs. The prepared PDs revealed a good linear relationship from 0.1 to 1000 μmol L-1 for Cr(VI) with a detection limit of 0.03 μmol L-1, which further used to track the Cr distribution in water samples. Finally, the IPA-doped PDs with excellent optical properties, biocompatibility, and high quantum yield showed promising potential in tracking Cr species and specifying of different Cr ions inside the human cells, which opening a new door toward getting a better insight into the cell function and metabolism in the presence of heavy metal ions, and especially chromium ions.
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Chromium speciation using paper-based analytical devices by direct determination and with electromembrane microextraction. Anal Chim Acta 2019; 1085:98-106. [PMID: 31522736 DOI: 10.1016/j.aca.2019.08.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 07/29/2019] [Accepted: 08/01/2019] [Indexed: 11/23/2022]
Abstract
In this study, we developed and compared three different methods for chromium speciation in water samples using microfluidic paper-based analytical devices (μPADs). In all methods, detection was based on the complexation reaction of Cr(VI) with diphenylcarbazide on the μPADs. Cr(III) ions were oxidized to Cr(VI) by Ce(IV) prior to colorimetric detection on the μPADs. In the first method, oxidization of Cr(III) to Cr(VI) in the solution containing both trivalent and hexavalent chromium was performed using a batch procedure to obtain total chromium. A dual electromembrane extraction (DEME) technique for simultaneous preconcentration and extraction of chromium species and a single electromembrane extraction (SEME) for preconcentration and extraction of Cr(VI)/total chromium [quantified as Cr(VI) content after oxidation of Cr(III) ions to Cr(VI)] were used in the second and third methods, respectively. The electromembrane extraction was based on the electrokinetic migration of cationic Cr(III) and anionic Cr(VI) toward the cathode and anode, respectively, into the two different hollow fibres. Octanol-1 and bis(2-ethylhexyl) phosphate (DEHP) in octanol-1 (0.7% v/v) were the most suitable supported liquid membranes for extraction of Cr(VI) and Cr(III), respectively. Among these methods, SEME showed the lowest limits of detection for both analytes. Under optimized conditions, linear calibrations were obtained for Cr(III) from 3 to 30 μg L-1 and for Cr(VI) from 3 to 70 μg L-1. The detection limits were 1.0 μg L-1 and 0.7 μg L-1 for Cr(III) and Cr(VI), respectively. Our developed method was applied to analyse water samples spiked with different concentrations of Cr(III) and Cr(VI) at the parts-per-billion (ppb) level. The statistical evaluation showed that the proposed method agreed well with the validation method, i.e., inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Li L, Zhao Y, Li X, Ma H, Wei Q. Label-free electrochemiluminescence immunosensor based on Ce-MOF@g-C3N4/Au nanocomposite for detection of N-terminal pro-B-type natriuretic peptide. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113222] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Song S, Liang F, Li M, Du F, Dong W, Gong X, Shuang S, Dong C. A label-free nano-probe for sequential and quantitative determination of Cr(VI) and ascorbic acid in real samples based on S and N dual-doped carbon dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 215:58-68. [PMID: 30822735 DOI: 10.1016/j.saa.2019.02.065] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/07/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
A fluorescent sulfur and nitrogen dual-doped carbon dots (S,N-CDs) was prepared by a simple and one-step acid-base neutralization and exothermic carbonization method. Hexavalent chromium (Cr(VI)) could effectively quench the fluorescence of S,N-CDs based on inner filter effect (IFE) and dynamic quenching, whereas ascorbic acid (AA) could recover the fluorescence of S,N-CDs/Cr(VI) because of IFE weakening. So an "on-off-on" and label-free nano-probe consecutive determination of Cr(VI) and AA was constructed. This nano-probe system demonstrated excellent selectivity and sensitivity to Cr(VI) and AA with linear range of 0.065-198 μmol/L (3.38-10,296 μg/L) and 6.6-892 μmol/L (1.16-157 mg/L), respectively. Meanwhile, the as-prepared S,N-CDs possess low toxicity and could be used for multi-color cell imaging in SMMC 7721 cells. More importantly, this nano-probe was successfully employed for detection of Cr(VI) in tap water and AA in food samples. In view of its simple detection condition, rapid response, wide linear range, low detection limit and inexpensive instrument, the as-constructed nano-probe system could have a wide range of potential application, including water quality monitoring and evaluation, food inspection and testing and biomedical analysis.
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Affiliation(s)
- Shengmei Song
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Fan Liang
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Minglu Li
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Fangfang Du
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Wenjuan Dong
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Xiaojuan Gong
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
| | - Shaomin Shuang
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Chuan Dong
- Institute of Environmental Science and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
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A paper-based optical probe for chromium by using gold nanoparticles modified with 2,2′-thiodiacetic acid and smartphone camera readout. Mikrochim Acta 2018; 185:374. [DOI: 10.1007/s00604-018-2875-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 06/17/2018] [Indexed: 01/20/2023]
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Ultrasensitive immunoassay of insulin based on highly efficient electrochemiluminescence quenching of carboxyl-functionalized g-C3N4 through coreactant dual-consumption by NiPd-DNAzyme. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Rahbar N, Abbaszadegan P, Savarizadeh A. A sensitive fluorescent sensing strategy for nanomolar levels of metformin using graphitic carbon nitride nanosheets as nanofluoroprobe. Anal Chim Acta 2018; 1026:117-124. [PMID: 29852987 DOI: 10.1016/j.aca.2018.04.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 01/21/2023]
Abstract
A simple and green fluorescence detection system on the basis of the quenching effect of Cu(II) ions on the graphitic carbon nitride nanosheets (g-C3N4 NS) fluorescence and recording the changes of restored fluorescence intensity upon the addition of metformin (MET) was developed for the first time. The g-C3N4 NS were produced using high-temperature polymerization of melamine followed by ultrasonication-assisted liquid exfoliation. The method exhibited excellent sensitivity and accuracy toward MET with the detection as low as 3 nM and linear calibration curve in the range of 0.01-20 μM. In addition, this assay was successfully applied to the determination of MET concentration in human serum samples. It is robust and is suitable for fast, sensitive and cost effective measurement of MET in biological materials.
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Affiliation(s)
- Nadereh Rahbar
- Nanotechnology Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Medicinal Chemistry Departments, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Parivash Abbaszadegan
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Aye Savarizadeh
- Medicinal Chemistry Departments, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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