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Hebbar A, Selvaraj R, Vinayagam R, Varadavenkatesan T, Kumar PS, Duc PA, Rangasamy G. A critical review on the environmental applications of carbon dots. CHEMOSPHERE 2023; 313:137308. [PMID: 36410502 DOI: 10.1016/j.chemosphere.2022.137308] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/28/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
The discovery of zero-dimensional carbonaceous nanostructures called carbon dots (CDs) and their unique properties associated with fluorescence, quantum confinement and size effects have intrigued researchers. There has been a substantial increase in the amount of research conducted on the lines of synthesis, characterization, modification, and enhancement of properties by doping or design of composite materials, and a diversification of their applications in sensing, catalysis, optoelectronics, photovoltaics, and imaging, among many others. CDs fulfill the need for inexpensive, simple, and continuous environmental monitoring, detection, and remediation of various contaminants such as metals, dyes, pesticides, antibiotics, and other chemicals. The principles of green chemistry have also prompted researchers to rethink novel modes of nanoparticle synthesis by incorporating naturally available carbon precursors or developing micro reactor-based techniques. Photocatalysis using CDs has introduced the possibility of utilizing light to accelerate redox chemical transformations. This comprehensive review aims to provide the reader with a broader perspective of carbon dots by encapsulating the concepts of synthesis, characterization, applications in contaminant detection and photocatalysis, demerits and research gaps, and potential areas of improvement.
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Affiliation(s)
- Akshatha Hebbar
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Raja Selvaraj
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Ramesh Vinayagam
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Thivaharan Varadavenkatesan
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Ponnusamy Senthil Kumar
- Green Technology and Sustainable Development in Construction Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
| | - Pham Anh Duc
- Faculty of Safety Engineering, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Gayathri Rangasamy
- University Centre for Research and Development & Department of Civil Engineering, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India
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Balouch A, Jagirani MS, Alveroglu E, Lal S, Sirajuddin, Mahar AM, Mal D. Ultra-Fast Degradation of Thymol Blue Dye Under Microwave Irradiation Technique Using Alpha-orthorhombic Molybdenum Trioxide (α-MoO3) Colloidal Nanoparticles. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02381-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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3
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A Review on the Catalytic Remediation of Dyes by Tailored Carbon Dots. WATER 2022. [DOI: 10.3390/w14091456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Water polluted with dyes has become a serious global concern during the twenty-first century, especially for developing countries. Such types of environmental contaminant pose a severe threat to biodiversity, ecosystems, and human health globally; therefore, its treatment is an utmost requirement. Advanced technologies including the use of nanomaterials represent a promising water treatment technology with high efficiencies, low production costs, and green synthesis. Among the nanomaterials, carbon dots, as a new class of carbon-based nanoparticles, have attracted attention due to their unique features and advantages over other nanomaterials, which include high water solubility, easy fabrication and surface functionalisation, excellent electron-donating ability, and low toxicity. Such properties make carbon dots potential nanocatalysts for the Fenton-like degradation of environmental pollutants in water. Although recent studies show that carbon dots can successfully catalyse the degradation of dyes, there are still limited and controversial studies on the ecotoxicity and fate of these nanoparticles in the environment. In this review, the authors aim to summarise the recent research advances in water remediation by technologies using carbon dots, discuss important properties and factors for optimised catalytic remediation, and provide critical analysis of ecotoxicity issues and the environmental fate of these nanoparticles.
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Kumar S Kumar S, Kaushik RD, Purohit LP. ZnO-CdO nanocomposites incorporated with graphene oxide nanosheets for efficient photocatalytic degradation of bisphenol A, thymol blue and ciprofloxacin. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127332. [PMID: 34607025 DOI: 10.1016/j.jhazmat.2021.127332] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 09/11/2021] [Accepted: 09/21/2021] [Indexed: 05/27/2023]
Abstract
The widespread existence of different organic contaminants mostly phenolic compounds, organic dyes and antibiotics in water bodies initiated by the various industrial wastes that raised great scientific concern and public awareness as well recently owing to their prospective capability to spread these contaminants resistant gene and pose hazard to human. In the present study, a series of nanostructured ZnO-CdO incorporated with reduced graphene oxide (ZCG nanocomposites) were successfully synthesized by a simple refluxing method and characterized by using the X-ray diffraction (XRD), Raman spectroscopy, FT-IR spectroscopy, photoluminescence spectroscopy, field emission-scanning microscope (FE-SEM) and UV-visible diffused reflectance spectroscopy (DRS) for the photocatalytic degradation of bisphenol A (BPA), thymol blue (ThB) and ciprofloxacin (CFn) with illumination of UV light. The maximum degradation and mineralization of BPA, ThB and CFn was achieved around 98.5%, 98.38% and 99.28% over the ZCG-5 nanocomposite photocatalyst after UV light irradiation for 180 min, 120 min and 75 min, respectively. The superior photocatalytic activity of ZCG-5 ascribed to enhance adsorption capacity, effective separation of charge carriers consequential for the production of more ROS after incorporation of RGO nanosheets with ZnO-CdO in photocatalyst. The conceivable photocatalytic degradation mechanism of BPA, ThB and CFn was elucidated through ROS identification and the assessment of photocatalyst stability by reusability, EEO (kwh/m3order) and UV light dose (mJ/cm2) were evaluated. The plausible photocatalytic degradation pathways were proposed for the degradation of BPA, ThB and CFn via GC-MS analysis. The present work investigates the efficient removal of BPA, ThB and CFn using ZCG nanocomposites as photocatalyst.
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Affiliation(s)
- Sonu Kumar S Kumar
- Department of Chemistry, Gurukula Kangri (Deemed University), Haridwar, India
| | - R D Kaushik
- Department of Chemistry, Gurukula Kangri (Deemed University), Haridwar, India
| | - L P Purohit
- Department of Physics, Gurukula Kangri (Deemed University), Haridwar, India.
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Cailotto S, Massari D, Gigli M, Campalani C, Bonini M, You S, Vomiero A, Selva M, Perosa A, Crestini C. N-Doped Carbon Dot Hydrogels from Brewing Waste for Photocatalytic Wastewater Treatment. ACS OMEGA 2022; 7:4052-4061. [PMID: 35155899 PMCID: PMC8829871 DOI: 10.1021/acsomega.1c05403] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/29/2021] [Indexed: 05/09/2023]
Abstract
The brewery industry annually produces huge amounts of byproducts that represent an underutilized, yet valuable, source of biobased compounds. In this contribution, the two major beer wastes, that is, spent grains and spent yeasts, have been transformed into carbon dots (CDs) by a simple, scalable, and ecofriendly hydrothermal approach. The prepared CDs have been characterized from the chemical, morphological, and optical points of view, highlighting a high level of N-doping, because of the chemical composition of the starting material rich in proteins, photoluminescence emission centered at 420 nm, and lifetime in the range of 5.5-7.5 ns. With the aim of producing a reusable catalytic system for wastewater treatment, CDs have been entrapped into a polyvinyl alcohol matrix and tested for their dye removal ability. The results demonstrate that methylene blue can be efficiently adsorbed from water solutions into the composite hydrogel and subsequently fully degraded by UV irradiation.
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Affiliation(s)
- Simone Cailotto
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
- CSGI
− Italian Research Center for Colloids and Surface Science, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
| | - Daniele Massari
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
- CSGI
− Italian Research Center for Colloids and Surface Science, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
| | - Matteo Gigli
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
- CSGI
− Italian Research Center for Colloids and Surface Science, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
| | - Carlotta Campalani
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Massimo Bonini
- CSGI
− Italian Research Center for Colloids and Surface Science, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
- Department
of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
| | - Shujie You
- Division
of Material Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
| | - Alberto Vomiero
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
- Division
of Material Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, Sweden
| | - Maurizio Selva
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Alvise Perosa
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
| | - Claudia Crestini
- Department
of Molecular Sciences and Nanosystems, Ca’Foscari
University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy
- CSGI
− Italian Research Center for Colloids and Surface Science, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Firenze, Italy
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Beker SA, Khudur LS, Cole I, Ball AS. Catalytic degradation of methylene blue using iron and nitrogen-containing carbon dots as Fenton-like catalysts. NEW J CHEM 2022. [DOI: 10.1039/d1nj04761b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Carbon dots were modified with iron and nitrogen groups to produce specific surface groups and charge which demonstrated high efficiency for the Fenton-like degradation of methylene blue whilst markedly minimising its effluent toxicity.
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Affiliation(s)
- Sabrina A. Beker
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Leadin S. Khudur
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
| | - Ivan Cole
- Advanced Manufacturing and Fabrication, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - Andrew S. Ball
- School of Science, STEM College, RMIT University, Bundoora, VIC 3083, Australia
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Yin T, Zhou X, Shi J. Influence of amphiphilic molecules on the peroxidase-like behavior of nanoparticles in an aqueous solution. RSC Adv 2021; 11:23968-23974. [PMID: 35479042 PMCID: PMC9036758 DOI: 10.1039/d1ra03345j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/23/2021] [Indexed: 11/21/2022] Open
Abstract
Carbon dots (CDs) have drawn considerable attention in recent decades due to their outstanding biocompatibility and environmental friendliness. In this study, we synthesized ionic liquid (1-aminopropyl-3-methyl-imidazolium bromide)-modified carbon dots (IL-CDs) showing good peroxidase-like activity. Furthermore, we investigated their enzymic behavior in the presence of two different amphiphilic molecules, namely tert-butanol (TBA, a typical hydrotrope) and sodium bis (2-ethylhexyl) sulfosuccinate (AOT, a typical anionic surfactant). In an aqueous solution of TBA, a microscopic heterogeneous structure was formed in a certain concentration range of TBA, which resulted in an anomaly in the reaction process. However, in the AOT aqueous solution, the situation became more complicated. IL-CDs formed vesicles or precipitation at different concentrations of AOT, which led to different enzymic activities of IL-CDs due to the variance in the structure and the surface electronic density.
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Affiliation(s)
- Tianxiang Yin
- School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64250804 +86 21 64252012
| | - Xingnan Zhou
- The Affiliated Huai'an Hospital of Xuzhou Medical University and the Second People's Hospital of Huai'an Huai'an 223002 China
| | - Jing Shi
- School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China +86 21 64250804 +86 21 64252012
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8
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Dashtaki A, Mahjoub S, Zabihi E, Pourbagher R. The Effects of Pre-Treatment and Post-Treatment of Thymol against tert-Butyl Hydroperoxide (t-BHP) Cytotoxicity in MCF-7 Cell Line and Fibroblast Derived Foreskin. Rep Biochem Mol Biol 2021; 9:338-347. [PMID: 33649728 DOI: 10.29252/rbmb.9.3.338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background Some recent studies have reported anti-tumor activity for Thymol, but the findings are inconsistent. This study aimed to investigate and compare Thymol's effects on MCF-7 cancer cells and fibroblasts while treated with tert-Butyl hydroperoxide (t-BHP). Methods In the pre-treatment, MCF-7 and fibroblast cells were treated with various Thymol concentrations and incubated for 24 h. Then, t-BHP was added to a final concentration of 50 μM, and the cells were incubated for one h. In the post-treatment, cells were incubated first with 50 μM t-BHP for one h and then treated with Thymol. Cell viability was tested by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Thymol's antioxidant capacity was measured by DPPH and FRAP assays, and lipid peroxidation levels were determined by the TBARS method. Results The thymol effects were dose-dependent, and despite their antioxidant properties, at concentrations of 100 µg/ml or more, increased t-BHP toxicity and reduced cancer cell viability. MTT assay result showed that pre-treatment and post-treatment with Thymol for 24 hours effectively reduced MCF-7 and fibroblast cell viability compared with the untreated control group. Both pre- and post-treatment of Thymol, normal fibroblast cell viability was significantly greater than that of the MCF-7 cells. Conclusion Our finding showed that Thymol appears to be toxic to MCF-7 cells at lower concentrations than fibroblasts after 24 hours of incubation. Pre-treatment with Thymol neutralized the oxidative effect of t-BHP in fibroblasts but was toxic for MCF-7 cells.
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Affiliation(s)
- Afsaneh Dashtaki
- Student Research Committee, Babol University of Medical Sciences, Babol, I. R. Iran.,Department of Clinical Biochemistry, School of Medicine, Babol University of Medical Sciences, Babol, I. R. Iran
| | - Soleiman Mahjoub
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, I. R. Iran.,Department of Clinical Biochemistry, School of Medicine, Babol University of Medical Sciences, Babol, I. R. Iran
| | - Ebrahim Zabihi
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, I. R. Iran
| | - Roghayeh Pourbagher
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, I. R. Iran
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Nayak S, Prasad SR, Mandal D, Das P. Carbon dot cross-linked polyvinylpyrrolidone hybrid hydrogel for simultaneous dye adsorption, photodegradation and bacterial elimination from waste water. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122287. [PMID: 32066019 DOI: 10.1016/j.jhazmat.2020.122287] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 05/08/2023]
Abstract
The creation of a polymeric hydrogel from polyvinylpyrrolidone (PVP) cross-linked by Carbon Quantum Dots (CD) for the adsorption and photocatalytic degradation of both cationic and anionic dyes. PVP, an important biocompatible constituent and often surplus in cosmetic industry, was carboxylated through NaOH refluxing and covalently conjugated to surface amine functionality of CD derived from lemon juice and Cysteamine. The hybrid hydrogel was obtained from PVP-CD covalent conjugate by careful manipulation of pH and found to possess better rheological properties than only carboxylate-PVP. The monolayer physisorption of the dyes on the hydrogel was affected by hydrogen bonding, dispersion or inductive effect, and π-π interaction with the polymer backbone as well as the CD that followed pseudo-second-order kinetics. Degradation of the adsorbed dyes was instated by the unique Reactive Oxygen Species (ROS) generating ability of the CD embedded in the hydrogel matrix upon exposure to sunlight, the mechanism of which is also unveiled. The same CD-induced ROS was found to effectively annihilate both gram-positive and gram-negative bacteria in real polluted water in less than 10 min of photoexcitation of the hydrogel. The hydrogel was restored by mild acid wash that is able to perform dye adsorption and photo-degradation upto four cycles.
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Affiliation(s)
- Suman Nayak
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801103, Bihar, India
| | - Surendra Rajit Prasad
- National Institute of Pharmaceutical Education and Research, Hajipur, 844102, Bihar, India
| | - Debabrata Mandal
- National Institute of Pharmaceutical Education and Research, Hajipur, 844102, Bihar, India
| | - Prolay Das
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801103, Bihar, India.
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10
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Beker SA, Truskewycz A, Cole I, Ball AS. Green synthesis of Opuntia-derived carbon nanodots for the catalytic decolourization of cationic dyes. NEW J CHEM 2020. [DOI: 10.1039/d0nj03013a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Carbon nanodots, rich in functional groups and synthesised using green precursors, catalyse the decolourization of dyes under mild conditions.
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Affiliation(s)
- Sabrina A. Beker
- Centre for Environmental Sustainability and Remediation
- School of Science
- RMIT University
- Bundoora
- Australia
| | - Adam Truskewycz
- Advanced Manufacturing and Fabrication
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Ivan Cole
- Advanced Manufacturing and Fabrication
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Andrew S. Ball
- Centre for Environmental Sustainability and Remediation
- School of Science
- RMIT University
- Bundoora
- Australia
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11
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Dhenadhayalan N, Lin KC, Saleh TA. Recent Advances in Functionalized Carbon Dots toward the Design of Efficient Materials for Sensing and Catalysis Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1905767. [PMID: 31769599 DOI: 10.1002/smll.201905767] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/01/2019] [Indexed: 05/23/2023]
Abstract
Since the past decade, enormous research efforts have been devoted to the detection/degradation and quantification of environmental toxic pollutants and biologically important molecules due to their ubiquitous necessity in the fields of environmental protection and human health. These fields of sensor and catalysis are advanced to a new era after emerging of nanomaterials, especially, carbon nanomaterials including graphene, carbon nanotube, carbon dots (C-dots), etc. Among them, the C-dots in the carbon family are rapidly boosted in the aspect of synthesis and application due to their superior properties of chemical and photostability, highly fluorescent with tunable, non/low-toxicity, and biocompatibility. The C-dot-based functional materials have shown great potential in sensor and catalysis fields for the detection/degradation of environmental pollutants. The major advantage of C-dots is that they can be easily prepared from numerous biomass/waste materials which are inexpensive and environment-friendly and are suitable for a developing trend of sustainable materials. This review is devoted to the recent development (since 2017) in the synthesis of biomass- and chemical-derived C-dots as well as diverse functionalization of C-dots. Their capability as a sensor and catalyst and respective mechanism are summarized. The future perspectives of C-dots are also discussed.
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Affiliation(s)
- Namasivayam Dhenadhayalan
- Department of Chemistry, National Taiwan University, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - King-Chuen Lin
- Department of Chemistry, National Taiwan University, Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Tawfik A Saleh
- Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
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12
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Effect of surface modification on the peroxidase-like behaviors of carbon dots. Colloids Surf B Biointerfaces 2019; 178:163-169. [DOI: 10.1016/j.colsurfb.2019.03.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 01/30/2023]
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13
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Huang Q, He C, Zhang J, Li W, Fu Y. Unlocking the hidden talent of DNA: Unexpected catalytic activity for colorimetric assay of alkaline phosphatase. Anal Chim Acta 2018; 1055:98-105. [PMID: 30782376 DOI: 10.1016/j.aca.2018.12.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 12/11/2018] [Accepted: 12/14/2018] [Indexed: 01/22/2023]
Abstract
Carboxylic acids have been efficiently used to activate H2O2 to form even more potent oxidant-peroxy acids through enzyme-catalyzed processes. By employing acetic acid as the activator, herein we report for the first time that cofactor-free DNA displays unexpected activity in H2O2-mediated oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) under mild conditions. A series of 10-nt oligonucleotides were rationally designed with various combinations of double nucleotides including TG, AG, CG, TA and AC respectively, which demonstrates that the catalytic performance of DNA is highly dependent upon the sequence composition, strand length and continuous nucleotides. Inspired by phosphate-induced inhibition effects on the formation of peracetic acid, an ultrasensitive assay was well-established for monitoring alkaline phosphatase (ALP) on the basis of double terminal-phosphorylated G-rich oligonucleotides. Phosphorylated DNA not only serves as the substrate for ALP-catalyzed hydrolysis, but also acts as the enzyme-like catalyst for signal amplification. Quantitative determination of ALP is realized in a linear range from 0.05 to 15 mU/mL, resulting in the limit of detection of 0.01 mU/mL. The rapid and reliable test also has great potential in analyzing serum samples for practical disease diagnosis.
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Affiliation(s)
- Qingwei Huang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China
| | - Chuan He
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China
| | - Jinli Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China
| | - Wei Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China.
| | - Yan Fu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, PR China.
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