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Ruammaitree A, Praphanwong K, Taiphol A. Facile one-step hydrothermal synthesis of monolayer and turbostratic bilayer n-doped graphene quantum dots using sucrose as a carbon source. RSC Adv 2023; 13:23700-23707. [PMID: 37555086 PMCID: PMC10405785 DOI: 10.1039/d3ra04402e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023] Open
Abstract
Graphene quantum dots (GQDs) have attracted attention from researchers owing to their outstanding properties, such as chemical inertness, stable photoluminescence (PL), biocompatibility, and low toxicity, which make them suitable for bioimaging, optoelectronic device, sensor, and others. At present, there are several studies that report the effect of the size of GQDs on their properties; however, but there is only a few studies that report the effect of the thickness of GQDs on their properties. It may be attributed to the difficulty to obtain the accurate information on the thickness of GQDs. In this study, we demonstrate the facile and one-step hydrothermal synthesis of monolayer and bilayer n-doped graphene quantum dots (NGQDs) using sucrose as a carbon source. UV-visible and PL spectra show the quantum yield of the NGQDs is 4.9 times higher than that of the GQDs. Besides, the NGQDs exhibit sensitive PL for Ag+ ions. In addition, the thickness distribution and interlayer spacing of NGQDs are revealed by X-ray diffraction (XRD) curve fitting, which is calculated using a simple and accurate equation. The information on the structure of the NGQDs from the XRD curve fitting is in a good agreement with the Raman results. This accurate estimation of the structure of GQDs by XRD curve fitting using the simple equation may extend the limits of GDQ study.
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Affiliation(s)
- Akkawat Ruammaitree
- Department of Physics, Faculty of Science and Technology, Thammasat University Pathum Thani 12120 Thailand
- Thammasat University Research Unit in Synthesis and Applications of Graphene, Thammasat University Pathum Thani 12120 Thailand
| | - Kanyaporn Praphanwong
- Department of Physics, Faculty of Science and Technology, Thammasat University Pathum Thani 12120 Thailand
| | - Arunocha Taiphol
- Department of Physics, Faculty of Science and Technology, Thammasat University Pathum Thani 12120 Thailand
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2
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Centane S, Mgidlana S, Openda Y, Nyokong T. Single vs sandwich aptamers: Towards the detection of human epidermal growth factor receptor 2 using composites of phthalocyanine and nanoparticles. Bioelectrochemistry 2023; 153:108496. [PMID: 37392577 DOI: 10.1016/j.bioelechem.2023.108496] [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: 03/31/2023] [Revised: 06/20/2023] [Accepted: 06/23/2023] [Indexed: 07/03/2023]
Abstract
The superiority of the sandwich over a single aptamer based aptasensor assay for the detection of the human epidermal growth factor receptor 2 (HER2) is demonstrated for the first time. Cobalt tris-3,5 dimethoxy-phenoxy pyridine (5) oxy (2)- carboxylic acid phthalocyanine (CoMPhPyCPc) and sulphur/nitrogen doped graphene quantum dots (SNGQDs) and cerium oxide nanoparticles (CeO2NPs) nanocomposite (SNGQDs@CeO2NPs) were used for electrode modification of glassy carbon electrode (GCE) both individually and combined to form the substrates: GCE/SNGQDs@CeO2NPs, GCE/CoMPhPyCPc and GCE/SNGQDs@CeO2NPs/CoMPhPyCPc. The designed substrates were used as immobilization platforms for the amino functionalized HB5 aptamer for the development of both single and sandwich aptasensor assays. A novel bioconjugate, made of the HB5 aptamer and nanocomposite (HB5-SNGQDs@CeO2NPs) was fabricated, and characterized using ultra-violet/visible, Fourier transform infrared, and Raman spectroscopies as well as scanning electron microscopy. HB5-SNGQDs@CeO2NPs was applied as a secondary aptamer in the design of novel sandwich assays towards the electrochemical detection of HER2. The performance of the designed aptasensors were evaluated using electrochemical impedance spectroscopy. The sandwich assay gave low limit of detection of 0.00088 pg/mL, high sensitivity of 773925 Ω pg-1mL, showed stability, and good precision in real samples towards HER2 detection.
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Affiliation(s)
- Sixolile Centane
- Institute of Nanotechnology Innovation, Rhodes University, Makhanda 6140, South Africa
| | - Sithi Mgidlana
- Institute of Nanotechnology Innovation, Rhodes University, Makhanda 6140, South Africa
| | - Yolande Openda
- Institute of Nanotechnology Innovation, Rhodes University, Makhanda 6140, South Africa
| | - Tebello Nyokong
- Institute of Nanotechnology Innovation, Rhodes University, Makhanda 6140, South Africa.
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Annamalai K, Annamalai A, Ravichandran R, Elumalai S. Recyclable waste Dry-cell batteries derived carbon dots (CDs) for detection of Two-fold metal ions and degradation of BTB dye. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 163:61-72. [PMID: 37001313 DOI: 10.1016/j.wasman.2023.03.032] [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: 11/25/2022] [Revised: 03/06/2023] [Accepted: 03/22/2023] [Indexed: 06/19/2023]
Abstract
In modern era, electronic wastes are one of the major threats around us, most of them are reused with less efficiency instead of re-usage, and conversion into valuable products is highly recommended. In this work, we report an innovative approach for the synthesis of highly photoluminescent CDs from waste dry-cell batteries through one-step hydrothermal treatment for the detection and degradation of environmental pollutants. The as-prepared CDs were studied by X-ray photoelectron spectroscopy (XPS), HR-TEM studies, X-ray diffractometer (XRD), Raman spectrometer, FTIR spectroscopy, UV-visible spectrophotometer, and spectrofluorometric measurements. The calculated quantum yield for synthesized CDs was around 13 %. The CDs have uniform particle size distribution, strong photoluminescent behavior, and possess high stability against various environmental conditions. Also, CDs display the selective and sensitive detection of Cr6+ and Co2+ and ions with a detection limit of around 0.11 µM and 0.10 µM respectively. The possible mechanism of CDs was also examined. Moreover, the photocatalytic activity of CDs with Bromothymol Blue (BTB) dye was studied. The degradation efficiency of BTB dye can be achieved at around 84 % over 180 min under the irradiation of direct sunlight in presence of H2O2. To date, it's the first time we have recycled waste dry-cell batteries into CDs as an effective probe for the detection and decomposition of environmental pollution. Furthermore, this work provides not only an easier route to make good quality and improved photoluminescent CDs from waste material like used batteries and also paves way for the reconversion of global treating waste. Finally, the outstanding detection capability with multiple properties of as-prepared CDs provides various environmental applications like the detection of pollutants and carcinogenic polluted water treatment.
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Affiliation(s)
- Kumaresan Annamalai
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India
| | - Arun Annamalai
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India
| | - Ramya Ravichandran
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India
| | - Sundaravadivel Elumalai
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India.
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Inbanathan FPN, Cimatu KLA, Ingram DC, Erasquin UJ, Dasari K, Sultan MS, Sajjad M, Makarov V, Weiner BR, Morell G, Sharifi Abdar P, Jadwisienczak WM. Paramagnetism in Microwave-Synthesized Metal-Free Nitrogen-Doped Graphene Quantum Dots. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093410. [PMID: 37176291 PMCID: PMC10179833 DOI: 10.3390/ma16093410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/11/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Nitrogen-doped graphene quantum dots (NGQDs) have gained significant attention due to their various physical and chemical properties; however, there is a gap in the study of NGQDs' magnetic properties. This work adds to the efforts of bridging the gap by demonstrating the room temperature paramagnetism in GQDs doped with Nitrogen up to 3.26 at.%. The focus of this experimental work was to confirm the paramagnetic behavior of metal free NGQDs resulting from the pyridinic N configuration in the GQDs host. Metal-free nitrogen-doped NGQDs were synthesized using glucose and liquid ammonia as precursors by microwave-assisted synthesis. This was followed by dialysis filtration. The morphology, optical, and magnetic properties of the synthesized NGQDs were characterized carefully through atomic force microscopy (AFM), transmission electron microscopy (TEM)), UV-VIS spectroscopy, fluorescence, X-ray photon spectroscopy (XPS), and vibrating sample magnetometer (VSM). The high-resolution TEM analysis of NGQDs showed that the NGQDs have a hexagonal crystalline structure with a lattice fringe of ~0.24 nm of (1120) graphene plane. The N1s peak using XPS was assigned to pyridinic, pyrrolic, graphitic, and oxygenated NGQDs. The magnetic study showed the room-temperature paramagnetic behavior of NGQDs with pyridinic N configuration, which was found to have a magnetization of 20.8 emu/g.
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Affiliation(s)
- Flavia P N Inbanathan
- School of Electrical Engineering and Computer Science, Ohio University, Athens, OH 45701, USA
| | | | - David C Ingram
- Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USA
| | | | - Kiran Dasari
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
| | - Muhammad Shehzad Sultan
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Muhammad Sajjad
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Vladimir Makarov
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Brad R Weiner
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Department of Chemistry, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
| | - Gerardo Morell
- Department of Physics, University of Puerto Rico-Rio Piedras Campus, San Juan, PR 00925-2537, USA
- Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926-2614, USA
| | - Payman Sharifi Abdar
- Department of Chemical and Biomedical Engineering, Institute for Corrosion and Multiphase Flow Technology, Ohio University, Athens, OH 45701, USA
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Jovanović S, Marković Z, Budimir M, Prekodravac J, Zmejkoski D, Kepić D, Bonasera A, Marković BT. Lights and Dots toward Therapy-Carbon-Based Quantum Dots as New Agents for Photodynamic Therapy. Pharmaceutics 2023; 15:pharmaceutics15041170. [PMID: 37111655 PMCID: PMC10145889 DOI: 10.3390/pharmaceutics15041170] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/01/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
The large number of deaths induced by carcinoma and infections indicates that the need for new, better, targeted therapy is higher than ever. Apart from classical treatments and medication, photodynamic therapy (PDT) is one of the possible approaches to cure these clinical conditions. This strategy offers several advantages, such as lower toxicity, selective treatment, faster recovery time, avoidance of systemic toxic effects, and others. Unfortunately, there is a small number of agents that are approved for usage in clinical PDT. Novel, efficient, biocompatible PDT agents are, thus, highly desired. One of the most promising candidates is represented by the broad family of carbon-based quantum dots, such as graphene quantum dots (GQDs), carbon quantum dots (CQDs), carbon nanodots (CNDs), and carbonized polymer dots (CPDs). In this review paper, these new smart nanomaterials are discussed as potential PDT agents, detailing their toxicity in the dark, and when they are exposed to light, as well as their effects on carcinoma and bacterial cells. The photoinduced effects of carbon-based quantum dots on bacteria and viruses are particularly interesting, since dots usually generate several highly toxic reactive oxygen species under blue light. These species are acting as bombs on pathogen cells, causing various devastating and toxic effects on those targets.
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Affiliation(s)
- Svetlana Jovanović
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Zoran Marković
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Milica Budimir
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Jovana Prekodravac
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Danica Zmejkoski
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Dejan Kepić
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Aurelio Bonasera
- Palermo Research Unit, Department of Physics and Chemistry-Emilio Segrè, University of Palermo and Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), 90128 Palermo, Italy
| | - Biljana Todorović Marković
- Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
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Selvaraj S, Dhesingh RS. Preparation and characterization of carbon quantum dot‐hydroxyapatite‐alginate based hybrid fluorescent ink for sensor application. J Appl Polym Sci 2023. [DOI: 10.1002/app.53721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- Sharmila Selvaraj
- Nano‐Bio Materials and Sensors Laboratory, National Centre for Nanoscience and Nanotechnology University of Madras, Guindy Campus Chennai Tamil Nadu India
| | - Ravi Shankaran Dhesingh
- Nano‐Bio Materials and Sensors Laboratory, National Centre for Nanoscience and Nanotechnology University of Madras, Guindy Campus Chennai Tamil Nadu India
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Du Z, Cai H, Zhao Z, Guo Z, Lin J, Huang Y, Tang C, Chen G, Fang Y. Facile synthesis of graphene quantum dots and C-doping porous BN nanoribbon heterojunctions for boosting CO2 photoreduction. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Construction of step-scheme g-C3N4/Co/ZnO heterojunction photocatalyst for aerobic photocatalytic degradation of synthetic wastewater. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Annamalai A, Annamalai K, Ravichandran R, Bharathkumar S, Elumalai S. Multi-functional carbon dots from simple precursors: an excellent heavy metal ions sensor with photocatalytic activity in aqueous environment. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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