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Kumar R, Vincy A, Rani K, Jain N, Singh S, Agarwal A, Vankayala R. Facile Synthesis of Multifunctional Carbon Dots Derived from Camel Milk for Mn 7+ Sensing and Antiamyloid and Anticancer Activities. ACS OMEGA 2023; 8:36521-36533. [PMID: 37810638 PMCID: PMC10552091 DOI: 10.1021/acsomega.3c05485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/05/2023] [Indexed: 10/10/2023]
Abstract
Carbon dots (CDs) are promising biocompatible fluorescent nanoparticles mainly used in bioimaging, drug delivery, sensing, therapeutics, and various other applications. The utilization of natural sources and green synthetic approaches is resulting in highly biocompatible and nontoxic nanoparticles. Herein, we report an unprecedented facile and green synthesis of highly luminescent carbon dots derived from camel milk (CM) for sensing manganese (Mn7+) ions and for identifying the anticancer potential and antiamyloid activity against α-synuclein amyloids. α-Synuclein amyloid formation due to protein misfolding (genetic and environmental factors) has gained significant attention due to its association with Parkinson's disease and other synucleinopathies. The as-synthesized CM-CDs possess an average hydrodynamic diameter ranging from 3 to 15 nm and also exhibit strong photoluminescence (PL) emission in the blue region. The CM-CDs possess good water dispersibility, stable fluorescence under different physical states, and outstanding photostability. Moreover, the CM-CDs are validated as an efficient sensor for the detection of Mn7+ ions in DI water and in metal ion-polluted tap water. In addition, the CM-CDs have demonstrated a very good quantum yield (QY) of 24.6% and a limit of detection (LOD) of 0.58 μM for Mn7+ ions with no incubation time. Consequently, the exceptional properties of CM-CDs make them highly suitable for a diverse array of biomedical applications.
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Affiliation(s)
- Rahul Kumar
- Department
of Bioscience and Bioengineering, Indian
Institute of Technology Jodhpur, Karwar 342030, India
| | - Antony Vincy
- Department
of Bioscience and Bioengineering, Indian
Institute of Technology Jodhpur, Karwar 342030, India
| | - Khushboo Rani
- Department
of Bioscience and Bioengineering, Indian
Institute of Technology Jodhpur, Karwar 342030, India
| | - Neha Jain
- Department
of Bioscience and Bioengineering, Indian
Institute of Technology Jodhpur, Karwar 342030, India
- Centre
for Emerging Technologies for Sustainable Development (CETSD), Indian Institute of Technology Jodhpur, Karwar 342030, India
| | - Sarvar Singh
- Department
of Electrical Engineering, Indian Institute
of Technology Jodhpur, Karwar 342030, India
| | - Ajay Agarwal
- Interdisciplinary
Research Platform Smart Healthcare, Indian
Institute of Technology Jodhpur, Karwar 342030, India
- Department
of Electrical Engineering, Indian Institute
of Technology Jodhpur, Karwar 342030, India
| | - Raviraj Vankayala
- Department
of Bioscience and Bioengineering, Indian
Institute of Technology Jodhpur, Karwar 342030, India
- Interdisciplinary
Research Platform Smart Healthcare, Indian
Institute of Technology Jodhpur, Karwar 342030, India
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Swathi R, Reddy GB, Rajkumar B, Ramakrishna D, Swamy PY. Jamun Seed-Derived Nitrogen-Doped Carbon Dots: A Novel Microwave-Assisted Synthesis for Ultra-Bright Fluorescence and Mn 7+ Detection. J Fluoresc 2023:10.1007/s10895-023-03438-2. [PMID: 37747598 DOI: 10.1007/s10895-023-03438-2] [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: 08/03/2023] [Accepted: 09/08/2023] [Indexed: 09/26/2023]
Abstract
For the synthesis of heteroatom-doped carbon nanostructures, biomass is considered as a promising option. Utilizing the microwave-assisted method, we have demonstrated an easy and straightforward one-pot synthesis of nitrogen-doped luminous carbon dots (NCDs) from jamun seed powder and guanidine hydrochloride. Structural and morphological analyses were performed using various analytical techniques. Under ultraviolet light of 315 nm, NCDs emit a bright blue fluorescence, possess a high quantum yield of 26.90%, exhibit strong water dispersion, and demonstrated excellent stability. The average particle size of the NCDs was found to be 7.5±1.2 nm, with a spherical shape. NCDs exhibit high selectivity and sensitivity in fluorescence quenching when exposed to Mn7+ ions. Over a concentration range of 2-30 µM, the fluorescence response (F0/F) shows a linear relationship with Mn7+ concentration, with a detection limit of 0.81 µM. The probe exhibited negligible interference and proved to be effective in accurately quantifying Mn7+ in spiked real-water samples.
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Affiliation(s)
- R Swathi
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - G Bhagavanth Reddy
- Department of Chemistry, Palamuru University, Wanaparthy, Telangana, 509001, India
| | - Bandi Rajkumar
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - Dadigala Ramakrishna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - P Yadagiri Swamy
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India.
- Department of Chemistry, Palamuru University, Wanaparthy, Telangana, 509001, India.
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3
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Facile and sustainable synthesis of sodium lignosulfonate derived carbon quantum dots for the detection of total Mn and ascorbic acid. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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4
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Ultrasensitive determination of allura red in food samples based on green-emissive carbon nanodots. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-022-01564-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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5
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Lv X, Wang F, Cui Y, Fan B, Kong Z, Yan T, Li M. Modification and validation of the simultaneous detection of 38 pesticide residues method by ultra-high-performance liquid chromatography/tandem mass spectrometry with QuEChERS extraction in different oil crops and products. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2022; 36:e9284. [PMID: 35229913 DOI: 10.1002/rcm.9284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 02/25/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
RATIONALE Oil crops and products are important food materials in daily life. Pesticide residues in food could directly and indirectly endanger human health. However, the method for detecting multiple pesticides simultaneously is limited. In this study, an easy and efficient method for the simultaneous determination of 38 pesticides in oil crops and products was established and validated. METHODS All samples were treated with a modified QuEChERS procedure followed by ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS) analysis. Mass spectrometry was performed in positive and negative ion electrospray ionization mode. The mobile phase consisted of 0.1% formic acid in water and 0.1% formic acid in acetonitrile. The column used was a Poroshell 120 EC-C18 and the flow rate was 0.3 mL/min. RESULTS The method was validated so that the calibration curves for all pesticides had good linearity in the concentration range of 10-1000 μg/L with correlation coefficients (R2 ) above 0.9945. The recovery rates were between 70.1 and 120.0%, with relative standard deviations (RSDs) (n = 6) ≤20.0%. The limits of quantification (LOQs) ranged from 0.5 to 10 μg/kg, limits of detection (LODs) ranged from 2.0 to 30 μg/kg, and the matrix effect (ME) ranged from -18.77 to 19.33%, respectively. CONCLUSIONS The method proved to be accurate, sensitive, and stable. It can be used for rapid screening and confirmation of 38 pesticide residues in oil crops and products which takes 10 min for sample extraction and clean-up with less requirement of solvents. This study provides a technical basis for regulatory analysis and quality supervision of foods.
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Affiliation(s)
- Xi Lv
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Fengzhong Wang
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Ying Cui
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Bei Fan
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Zhiqiang Kong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Tingcai Yan
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Minmin Li
- Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
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6
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Sensitive optical thin film sensor based on incorporation of 2-(2′-hydroxynaphthylazo)-benzothiazole in a sol–gel matrix for detection of manganese(II) in environmental samples. Anal Biochem 2022; 651:114720. [DOI: 10.1016/j.ab.2022.114720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/26/2022] [Accepted: 05/03/2022] [Indexed: 12/23/2022]
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7
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Wang P, Wang J, Liu T, Sun Z, Gao M, Huang K, Wang X. Loquat fruit-based carbon quantum dots as an “ON-OFF” probe for fluorescent assay of MnO4- in waters based on the joint action of inner filter effect and static quenching. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Noori SMA, Hashemi M, Ghasemi S. A Comprehensive Review of Minerals, Trace Elements, and Heavy Metals in Saffron. Curr Pharm Biotechnol 2022; 23:1327-1335. [PMID: 34983343 DOI: 10.2174/1389201023666220104142531] [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: 08/02/2021] [Revised: 10/20/2021] [Accepted: 11/14/2021] [Indexed: 11/22/2022]
Abstract
Saffron is one of the most expensive spices in the world, and its popularity as a tasty food additive is spreading rapidly through many cultures and cuisines. Minerals and heavy metals are minor components found in saffron, which play a key role in the identification of the geographical origin, quality control, and food traceability, while they also affect human health. The chemical elements in saffron are measured using various analytical methods, such as techniques based on spectrometry or spectroscopy, including atomic emission spectrometry, atomic absorption spectrometry, inductively coupled plasma optical emission spectrometry, and inductively coupled plasma mass spectrometry. The present study aimed to review the published articles about heavy metals and minerals in saffron across the world. To date, 64 chemical elements have been found in different types of saffron, which could be divided into three groups of macro-elements, trace elements, and heavy metals (trace elements with a lower gravity/greater than five times that of water and other inorganic sources). Furthermore, the chemical elements in the saffron samples of different countries have a wide range of concentrations. These differences may be affected by geographical condition such as physicochemical properties of the soil, weather and other environmental conditions like saffron cultivation and its genotype.
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Affiliation(s)
- Sayyed Mohammad Ali Noori
- Toxicology Research Center, Medical Basic Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Nutrition, School of Allied Medicine, Jundishahpour University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Hashemi
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Sajjad Ghasemi
- Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Nutrition, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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9
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Hu Q, Sun H, Liu L, Xiao L, Yang ZQ, Rao S, Gong X, Han J. Development of an ultrasensitive spectrophotometric method for carmine determination based on fluorescent carbon dots. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:731-740. [PMID: 33684336 DOI: 10.1080/19440049.2021.1889045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A high-efficiency spectrophotometric method based on nitrogen-doped fluorescent carbon dots (N-FCDs) was developed for the ultrasensitive determination of carmine (CRM) in foodstuffs. The N-FCDs were fabricated via a one-pot hydrothermal method with m-phenylenediamine as the starting material. The detection principle was based on the fluorescence quenching effect of N-FCDs by CRM, where their interaction was due to the inner filter effect (IFE) and static quenching. A good linear relationship was established for CRM detection in a concentration range of 0.1-10.0 μM with a detection limit as low as 11.2 nM. The proposed method achieved satisfactory results for CRM determination in commercial food products with recoveries better than 98.6% and relative standard deviations (RSDs) less than 4.07%. The method established in this study was simple, ultrasensitive and reliable for rapid detecting CRM in a food matrix, which could be potentially used as a useful sensing agent for the analysis of additive food colourants.
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Affiliation(s)
- Qin Hu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Huijuan Sun
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Lingfei Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Lixia Xiao
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Zhen-Quan Yang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Shengqi Rao
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Xiaojuan Gong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Jie Han
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China
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10
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Mohammed A, Gugulothu Y, Bandi R, Dadigala R, Utkoor UK. Ultraspeed synthesis of highly fluorescent N‐doped carbon dots for the label‐free detection of manganese (
VII
). J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000545] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Areef Mohammed
- Department of Chemistry Osmania University Hyderabad India
| | - Yaku Gugulothu
- Department of Chemistry Osmania University Hyderabad India
| | - Rajkumar Bandi
- Department of Chemistry Osmania University Hyderabad India
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11
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Development of a highly sensitive fluorescence method for tartrazine determination in food matrices based on carbon dots. Anal Bioanal Chem 2021; 413:1485-1492. [PMID: 33462660 DOI: 10.1007/s00216-020-03118-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/26/2020] [Accepted: 12/08/2020] [Indexed: 10/22/2022]
Abstract
In this work, an ultrasensitive sensing system based on fluorescent carbon dots (CDs) was developed for the tartrazine (Tar) determination. The CDs were prepared via a simple one-pot hydrothermal method with m-phenylenediamine as the only precursor. The physical and chemical properties were in detail characterized by transmission electron microscopy (TEM), MALDI-TOF MS, UV-vis absorption and photoluminescence (PL) spectroscopy, elemental analysis, and Fourier transform infrared spectroscopy (FTIR). Upon exposure to Tar, the fluorescence of CDs was efficiently quenched via the dynamic interaction between CDs and Tar as well as the inner filter effect (IFE). With this information, the CDs were proposed as a fluorescence probe for Tar detection. It was found that CDs had high sensitivity and selectivity for Tar sensing, and the linear relationship was observed in the range of 0.01-25.0 μM with the corresponding detection limit (3σ/k) of 12.4 nM, which is much more sensitive than any of the existed CD-based sensing platform. The investigated sensing system was finally utilized for Tar sensing in various food matrices with a high degree of accuracy. The spiked recoveries were in a range of 96.4-105.2%, and the relative standard deviations (RSDs) were lower than 4.13%. This work highlights the great application prospects of CDs for Tar sensing in a rapid, simple, and sensitive way.
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12
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Hu Q, Pan Y, Zhang J, Yang ZQ, Xiao L, Gong X, Han J. A sensitive spectrofluorimetry method based on S and N dual-doped carbon nanoparticles for ultra-trace detection of ferrocyanide ion in food salt samples. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 38:195-207. [PMID: 33301365 DOI: 10.1080/19440049.2020.1852322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
An ultra-sensitive spectrofluorimetry method was developed and validated for the rapid determination of ferrocyanide ions (hexacyanidoferrate(II), FeCN6 4-, FCNs) by using sulphur (S) and nitrogen (N) dual-doped fluorescence carbon nanoparticles (S,N-FCNPs) as nanoprobe. The fluorescence of S,N-FCNPs was strongly reduced due to the dynamic interaction between S,N-FCNPs and FeCNs. The developed method proved to be highly sensitive and selective for FeCNs detection with linearity in three concentration ranges over four orders of magnitude, covering 0.01-200.0 μg/mL. A limit of detection (LOD) of 2.8 ng/mL was obtained. The method was successfully applied for the determination of FeCNs in a series of dietary food salt samples and gave satisfactory results; the spiked recoveries were 97.6‒104.6% with standard uncertainty less than 5.8%. The method proved to be applicable for ultra-trace detection of FeCNs in food salt samples, having advantages in great simplicity, rapid response, low cost, favourable selectivity, and high sensitivity.
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Affiliation(s)
- Qin Hu
- College of Food Science and Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
| | - Yangni Pan
- College of Food Science and Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
| | - Jian Zhang
- College of Food Science and Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
| | - Zhen-Quan Yang
- College of Food Science and Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
| | - Lixia Xiao
- College of Food Science and Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
| | - Xiaojuan Gong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University , Taiyuan, PR China
| | - Jie Han
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou, Jiangsu, PR China
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Liu L, Hu Q, Sun H, Han J, Pan Y, Yang ZQ. An ultra-sensitive analytical platform based on bluish green emitting carbon quantum dots for the detection of curcumin in dietary foods. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103639] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Liu F, Li H, Liao D, Xu Y, Yu M, Deng S, Zhang G, Xiao T, Long J, Zhang H, Li Y, Li K, Zhang P. Carbon quantum dots derived from the extracellular polymeric substance of anaerobic ammonium oxidation granular sludge for detection of trace Mn(vii) and Cr(vi). RSC Adv 2020; 10:32249-32258. [PMID: 35518178 PMCID: PMC9056554 DOI: 10.1039/d0ra06133f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 08/24/2020] [Indexed: 11/21/2022] Open
Abstract
Carbon quantum dots (CQDs) were synthesized via a hydrothermal method, in which extracellular polymeric substance (EPS) from anaerobic ammonium oxidation (anammox) granular sludge was used as a carbon precursor, while citric acid and ethylenediamine were applied as auxiliary carbon source and passivation agent, respectively. The synthesized CQDs, with orderly spherical shape and mean size of 7.15 nm, emitted blue fluorescent light under UV radiation of 365 nm. The CQDs had a high fluorescence yield (40.84%), with good water solubility and excellent spectroscopic properties. In addition, the CQDs exhibited selective, sensitive and distinctive fluorescence quenching behaviors for Cr(vi) and Mn(vii) in a PBS buffer solution (NaH2PO4–Na2HPO4) of pH 7, with a detection limit of 5.8 nM for Cr(vi) and 2.3 nM for Mn(vii). Owing to the nitrogen components from the EPS of anammox granules, the CQDs were well nitrogen-doped, promoting electron-transfer and leading to reduction between the CQDs and Mn(vii)/Cr(vi). These results indicate that CQD-based chemical sensing is a simple and efficient means for the fluorescence detection of Mn(vii) and Cr(vi). Fluorescence detection of trace Mn(vii) or Cr(vi) by the CQDs prepared from anaerobic ammonium oxidation granular sludge.![]()
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Affiliation(s)
- Fengli Liu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, College of Chemistry and Chemical Engineering, Guangzhou University Guangzhou 510006 China +86 20 39366505
| | - Huosheng Li
- Institute of Environmental Research at Greater Bay Area, Guangzhou University Guangzhou 510006 China
| | - Dandan Liao
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Yanhong Xu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University Chongqing 400045 China
| | - Mingxia Yu
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Shengwen Deng
- Institute of Environmental Research at Greater Bay Area, Guangzhou University Guangzhou 510006 China
| | - Gaosheng Zhang
- Institute of Environmental Research at Greater Bay Area, Guangzhou University Guangzhou 510006 China
| | - Tangfu Xiao
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Jianyou Long
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Hongguo Zhang
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Yuting Li
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, College of Chemistry and Chemical Engineering, Guangzhou University Guangzhou 510006 China +86 20 39366505
| | - Keke Li
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Ping Zhang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, College of Chemistry and Chemical Engineering, Guangzhou University Guangzhou 510006 China +86 20 39366505
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