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Ajay Rakkesh R, Naveen TB, Durgalakshmi D, Balakumar S. Covalent organic frameworks: Pioneering remediation solutions for organic pollutants. Chemosphere 2024; 346:140655. [PMID: 37949178 DOI: 10.1016/j.chemosphere.2023.140655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/19/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Covalent Organic Frameworks (COFs) have emerged as a promising class of crystalline porous materials with customizable structures, high surface areas, and tunable functionalities. Their unique properties make them attractive candidates for addressing environmental contamination caused by pharmaceuticals, pesticides, industrial chemicals, persistent organic pollutants (POPs), and endocrine disruptors (EDCs). This review article provides a comprehensive overview of recent advancements and applications of COFs in removing and remedying various environmental contaminants. We delve into the synthesis, properties, and performance of COFs and their potential limitations and future prospects.
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Affiliation(s)
- R Ajay Rakkesh
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, TN, India.
| | - T B Naveen
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, TN, India
| | - D Durgalakshmi
- Department of Medical Physics, Anna University, Chennai, 600 025, TN, India
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai, 600 025, TN, India
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Naveen TB, Durgalakshmi D, Balakumar S, Rakkesh RA. A high valence binary metal-organic framework as an electrode material for aqueous asymmetric supercapacitors. Chem Commun (Camb) 2023; 60:208-211. [PMID: 38050703 DOI: 10.1039/d3cc05195a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
This study presents the chemical transformation of nickel-based metal-organic frameworks into binary metal-organic frameworks by introducing cobalt metal ions. The resulting NiCo-BDC hierarchical nanostructure exhibited higher oxidation states, resulting in an impressive capacitance of 1431 F g-1. Additionally, the device based on this material exhibited exceptional capacity retention over 3000 cycles.
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Affiliation(s)
- T B Naveen
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, TN, 603203, India.
| | - D Durgalakshmi
- Department of Medical Physics, Anna University, Chennai, TN, 600025, India.
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai, TN, 600025, India
| | - R Ajay Rakkesh
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, TN, 603203, India.
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Tharani S, Rebecca PNB, Durgalakshmi D, Balakumar S, Rakkesh RA. Hydrothermal integration of MoO 2-MoS 2@rGO nanoframe networks: A promising approach for efficient bacterial disinfection in wastewater. Chemosphere 2023; 343:140273. [PMID: 37758069 DOI: 10.1016/j.chemosphere.2023.140273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 09/10/2023] [Accepted: 09/23/2023] [Indexed: 09/30/2023]
Abstract
The efficient disinfection of bacterial contaminants in wastewater is a critical challenge in the field of environmental remediation. Herein, we present a novel approach for efficient bacterial disinfection using hydrothermally integrated MoO2-MoS2@rGO nanoframe networks. The developed nanoframe networks exhibit a unique architecture comprising of molybdenum dioxide (MoO2) and molybdenum disulfide (MoS2) impregnated on algae biomass reduced graphene oxide (rGO). The as-synthesized nanoframe networks demonstrate exceptional antibacterial activity against Escherichia coli bacteria. The disinfection efficiency was evaluated by measuring the bacterial viability and observing the morphological changes using scanning electron microscopy. The MoO2-MoS2@rGO nanoframe networks exhibited a remarkable antibacterial effect, achieving a high disinfection rate of 95.8% within a short contact time of 10 min. The efficient bacterial disinfection capability of the nanoframe networks can be attributed to the synergistic effects of MoO2, MoS2, and rGO components. The MoO2 nanoparticles generate reactive oxygen species (ROS), persuading oxidative stress and leading to bacterial inactivation. The MoS2 nanoparticles possess inherent antibacterial properties through the release of Mo and S ions. The rGO nanosheets provide a conductive and stable platform, facilitating the charge transfer during the antibacterial process. Furthermore, the hydrothermal integration method enables easy scalability and cost-effectiveness of the MoO2-MoS2@rGO nanoframe networks. The nanoframe networks can be easily recovered and reused, reducing waste generation and promoting sustainability. Overall, this study presents a promising approach for efficient bacterial disinfection in wastewater using hydrothermally integrated MoO2-MoS2@rGO nanoframe networks. The remarkable antibacterial performance, along with the advantages of scalability and reusability, makes these nanoframe networks a potential candidate for practical applications in environmental remediation and water treatment processes.
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Affiliation(s)
- S Tharani
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur - 603203, TN, India
| | - P N Blessy Rebecca
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur - 603203, TN, India
| | - D Durgalakshmi
- Department of Medical Physics, Anna University, Chennai - 600 025, India
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai - 600 025, India
| | - R Ajay Rakkesh
- Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur - 603203, TN, India.
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Tharani S, Durgalakshmi D, Balakumar S, Rakkesh RA. Futuristic Advancements in Biomass‐Derived Graphene Nanoassemblies: Versatile Biosensors for Point‐of‐Care Devices. ChemistrySelect 2022. [DOI: 10.1002/slct.202203603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- S. Tharani
- Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603203 TN India
| | - D. Durgalakshmi
- Department of Medical Physics Anna University Chennai 600 025 TN India
- Department of Physics Ethiraj College for Women Chennai 600 008 TN India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology University of Madras Chennai 600 025 TN India
| | - R. Ajay Rakkesh
- Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603203 TN India
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Ajay Rakkesh R, Durgalakshmi D, Balakumar S. Scalable approach to fabricate paper-based biomass reduced graphene sensor for the detection of exhaled diabetic breath. Nanotechnology 2022; 33:495703. [PMID: 36041406 DOI: 10.1088/1361-6528/ac8d9c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Herein, we demonstrate a microwave-assisted chemical reduction technique to exfoliate a few layers of graphene from the natural waste material, 'coconut shell'. The microwave irradiation coconut shell is subjected to structural, morphological and functional groups characterization methods including SEM, Raman, FTIR and XPS spectroscopic analyses. The formation of biomass reduced graphene (BRG) has been confirmed through Raman and FTIR spectroscopic analyzes with the presence of D, G and 2D and other functional spectral bands, respectively. The surface topography of the BRG exhibits two-dimensional mat structures with wrinkle topography, imaged by electron microscopic techniques. The metallic behaviour of the BRG is evaluated by band structure calculation using density functional theory. The synthesized nanostructure has been evaluated for exhaled diabetic breath sensing application by fabricating sensor device on the paper-based substrate by roll-to-roll coating technique. The BRG sensor exhibited enhanced sensing response at a very lower concentration of diabetic biomarker with long term stability and rapid response/recovery time of 1.11 s/41.25 s, respectively. Based on our findings, the microwave-assisted BRG is a potential candidate for fabricating highly scalable, inherently safe, economically viable and excellent sensing performance to detect exhaled diabetic breath at room temperature.
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Affiliation(s)
- R Ajay Rakkesh
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur-603203, India
| | - D Durgalakshmi
- Department of Medical Physics, Anna University, Chennai-600 025, India
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai-600 025, India
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Blessy Rebecca PN, Durgalakshmi D, Balakumar S, Rakkesh RA. Biomass‐Derived Graphene‐Based Nanocomposites: A Futuristic Material for Biomedical Applications. ChemistrySelect 2022. [DOI: 10.1002/slct.202104013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- P. N. Blessy Rebecca
- Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603203 TN India
| | - D. Durgalakshmi
- Department of Medical Physics Anna University Chennai 600025 TN India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology University of Madras Chennai 600025 TN India
| | - R. Ajay Rakkesh
- Department of Physics and Nanotechnology SRM Institute of Science and Technology Kattankulathur 603203 TN India
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Bargavi P, Chandran RR, Durgalakshmi D, Rajashree P, Ramya R, Balakumar S. Drug infused Al 2O 3-bioactive glass coatings toward the cure of orthopedic infection. Prog Biomater 2022; 11:79-94. [PMID: 35094302 DOI: 10.1007/s40204-022-00181-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 01/11/2022] [Indexed: 11/27/2022] Open
Abstract
A unique implant coated substrate with dual-drug-eluting system exhibiting antibacterial, anti-inflammatory, and bone regenerative capacity has been fabricated using spray pyrolysis deposition (SPD) method. Bioglass (BG) and BG-alumina (BG-Al) composites coatings with different concentrations of Al incorporated on BG network over the Cp-Ti substrate were fabricated using SPD technique. Phase purity of BG and BG-Al composites were analyzed by XRD in which Na2Ca2Si3O9 and β-Na2Ca4(PO4)2SiO4) and Na7.15(Al7.2Si8.8O32) phases were formed. Surface morphology of the coated substrates was analyzed by SEM. Uniformity of the coatings were evaluated by surface profilometer and the uniform distribution the nanoparticles were confirmed with Elemental mapping. Systematically, each apatite layer formation on coated substrate was confirmed by immersing the samples for 1, 3, and 7 days in simulated body fluid and the needle-like structure was characterized using SEM. Cumulative release of Tetracycline hydrochloride (Tet) antibiotic and Dexamethasone (Dex) anti-inflammatory drug-loaded BG-Al and BG-Al composite-coated substrate were studied for 24 h. Antibacterial activity of the coated substrates were evaluated by time-dependent growth inhibition and minimal inhibitory concentration (MIC) assays in which BG-Al and BG-Al composite loaded with Tet showed considerable growth inhibition against S. aureus. Osteoblast-like cells (MG-63) exhibited profound proliferation with no cytotoxic effects which was due to release of Dex drug-coated substrates. Thus, surface modification of Cp-Ti substrate with BG, BG-Al composites coatings loaded with Tet and Dex drug can be considered for post-operative orthopedic implant infection application.
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Affiliation(s)
- P Bargavi
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai, 600 025, India
| | - R Riju Chandran
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai, 600 025, India
| | - D Durgalakshmi
- Department of Medical Physics, Anna University, Chennai, 600 025, India
| | - P Rajashree
- CAS in Crystallography & Biophysics, University of Madras, Guindy campus, Chennai, 600 025, India
| | - R Ramya
- Saveetha Dental College & Hospitals, SIMTS, Poonamallee High Road, Chennai, 600089, India
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai, 600 025, India.
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Gnanasekaran L, Pachaiappan R, Kumar PS, Hoang TKA, Rajendran S, Durgalakshmi D, Soto-Moscoso M, Cornejo-Ponce L, Gracia F. Visible light driven exotic p (CuO) - n (TiO 2) heterojunction for the photodegradation of 4-chlorophenol and antibacterial activity. Environ Pollut 2021; 287:117304. [PMID: 34015669 DOI: 10.1016/j.envpol.2021.117304] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/20/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
The treatment of industrial waste and harmful bacteria is an important topic due to the release of toxins from the industrial pollutants that damage the water resources. These harmful sources frighten the life of every organism which was later developed as the carcinogenic and mutagenic agents. Therefore, the current study focuses on the breakdown or degradation of 4-chlorophenol and the antibacterial activity against Escherichia coli (E. coli). As a well-known catalyst, pure titanium-di-oxide (TiO2) had not shown the photocatalytic activity in the visible light region. Hence, band position of TiO2 need to be shifted to bring out the absorption in the visible light region. For this purpose, the n-type TiO2 nanocrystalline material's band gap got varied by adding different ratios of p-type CuO. The result had appeared in the formation of p (CuO) - n (TiO2) junction synthesized from sol-gel followed by chemical precipitation methods. The optical band gap value was determined by Kubelka-Munk (K-M) plot through UV-Vis diffusive reflectance spectroscopy (DRS). Further, the comprehensive mechanism and the results of photocatalytic and antibacterial activities were discussed in detail. These investigations are made for tuning the TiO2 catalyst towards improving or eliminating the existing various environmental damages.
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Affiliation(s)
- Lalitha Gnanasekaran
- Laboratorio de Investigaciones Ambientales Zonas Áridas, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile
| | - Rekha Pachaiappan
- Department of Sustainable Energy Management, Stella Maris College, Chennai, 600086, Tamilnadu, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, India
| | - Tuan K A Hoang
- Centre of Excellence in Transportation Electrification and Energy Storage, Hydro-Québec, 1806, Boul. Lionel-Boulet, Varennes, J3X 1S1, Canada
| | - Saravanan Rajendran
- Laboratorio de Investigaciones Ambientales Zonas Áridas, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile.
| | - D Durgalakshmi
- Department of Medical Physics, CEG Campus, Anna University, Chennai, 600 025, India
| | - Matias Soto-Moscoso
- Departamento de Física, Facultad de Ciencias, Universidad Del Bío-bío, Avenida Collao 1202, Casilla 15-C, Concepción, Chile
| | - Lorena Cornejo-Ponce
- Laboratorio de Investigaciones Ambientales Zonas Áridas, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez 1775, Arica, Chile
| | - F Gracia
- Department of Chemical Engineering, Biotechnology and Materials, University of Chile, Beauchef 851, 6th Floor, Santiago, Chile
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Gnanasekaran L, Rajendran S, Priya AK, Durgalakshmi D, Vo DVN, Cornejo-Ponce L, Gracia F, Soto-Moscoso M. Photocatalytic degradation of 2,4-dichlorophenol using bio-green assisted TiO 2-CeO 2 nanocomposite system. Environ Res 2021; 195:110852. [PMID: 33556356 DOI: 10.1016/j.envres.2021.110852] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/27/2021] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
In recent times, cost effective synthesis of semiconductor materials has been a subject of concern for the day to today applications. In this work, novelty has been made on the facile synthesis of metal oxides (TiO2 and CeO2) and nanocomposites (TiO2-CeO2) through sol-gel and precipitation methods of imparting lemon extract. The synthesized materials behave as the functional catalysts which has been further carried out for the photocatalytic degradation against 2,4-Dichlorophenol (2,4-DCP). The materials are then valued for the structural and optical properties. The lemon extract used in synthesis has played a premier role in upgrading the charge carrier separation, bandgap, and size reduction of the composite system. Further, the CeO2 supported TiO2 sample acts as the better visible light catalyst, due to the prevention of aggregation and existence of line dislocation that supported to access the additional electron trap sites.
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Affiliation(s)
- Lalitha Gnanasekaran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, Arica, 1775, Chile
| | - Saravanan Rajendran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, Arica, 1775, Chile.
| | - A K Priya
- Department of Civil Engineering, KPR Institute of Engineering and Technology, Coimbatore, 641027, India
| | - D Durgalakshmi
- Department of Medical Physics, CEG Campus, Anna University, Chennai, 600 025, India
| | - Dai-Viet N Vo
- Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam
| | - Lorena Cornejo-Ponce
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, Arica, 1775, Chile
| | - F Gracia
- Department of Chemical Engineering, Biotechnology and Materials, University of Chile, Beauchef 851, 6th Floor, Santiago, Chile
| | - Matias Soto-Moscoso
- Departamento de Física, Facultad de Ciencias, Universidad Del Bío-bío, Avenida Collao 1202, Casilla 15-C, Concepción, Chile
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Prabha S, Durgalakshmi D, Rajendran S, Lichtfouse E. Plant-derived silica nanoparticles and composites for biosensors, bioimaging, drug delivery and supercapacitors: a review. Environ Chem Lett 2021; 19:1667-1691. [PMID: 33199978 PMCID: PMC7658439 DOI: 10.1007/s10311-020-01123-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 10/17/2020] [Indexed: 05/05/2023]
Abstract
Silica nanoparticles have rapidly found applications in medicine, supercapacitors, batteries, optical fibers and concrete materials, because silica nanoparticles have tunable physical, chemical, optical and mechanical properties. In most applications, high-purity silica comes from synthetic organic precursors, yet this approach could be costly, polluting and non-biocompatible. Alternatively, natural silica sources from biomass are often cheap and abundant, yet they contain impurities. Silica can be extracted from corn cob, coffee husk, rice husk, sugarcane bagasse and wheat husk wastes, which are often disposed of in rivers, lands and ponds. These wastes can be used to prepare homogenous silica nanoparticles. Here we review properties, preparation and applications of silica nanoparticles. Preparation includes chemical and biomass methods. Applications include biosensors, bioimaging, drug delivery and supercapacitors. In particular, to fight the COVID-19 pandemic, recent research has shown that silver nanocluster/silica deposited on a mask reduces SARS-Cov-2 infectivity to zero.
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Affiliation(s)
- S. Prabha
- Department of Medical Physics, Anna University, Chennai, 600025 India
| | - D. Durgalakshmi
- Department of Medical Physics, Anna University, Chennai, 600025 India
| | - Saravanan Rajendran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775 Arica, Chile
| | - Eric Lichtfouse
- Aix-Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Avenue Louis Philibert, 13100 Aix en Provence, France
- International Research Centre for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
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Karimi-Maleh H, Kumar BG, Rajendran S, Qin J, Vadivel S, Durgalakshmi D, Gracia F, Soto-Moscoso M, Orooji Y, Karimi F. Tuning of metal oxides photocatalytic performance using Ag nanoparticles integration. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113588] [Citation(s) in RCA: 203] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Mohanraj J, Durgalakshmi D, Rakkesh RA, Balakumar S, Rajendran S, Karimi-Maleh H. Facile synthesis of paper based graphene electrodes for point of care devices: A double stranded DNA (dsDNA) biosensor. J Colloid Interface Sci 2020; 566:463-472. [DOI: 10.1016/j.jcis.2020.01.089] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/23/2020] [Accepted: 01/23/2020] [Indexed: 12/11/2022]
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Bargavi P, Ramya R, Chitra S, Vijayakumari S, Riju Chandran R, Durgalakshmi D, Rajashree P, Balakumar S. Bioactive, degradable and multi-functional three-dimensional membranous scaffolds of bioglass and alginate composites for tissue regenerative applications. Biomater Sci 2020; 8:4003-4025. [DOI: 10.1039/d0bm00714e] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Multifunctional bioactive hydrogel ECM like membrane for 3D dynamic tissue/disease modelling.
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Affiliation(s)
- P. Bargavi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600 025
- India
| | - R. Ramya
- SRM Dental College
- SRMIST
- Chennai – 600089
- India
| | - S. Chitra
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600 025
- India
| | - S. Vijayakumari
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600 025
- India
| | - R. Riju Chandran
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600 025
- India
| | - D. Durgalakshmi
- Department of Medical Physics
- Anna University
- Chennai – 600 025
- India
| | - P. Rajashree
- CAS in Crystallography & Biophysics
- University of Madras
- Chennai – 600 025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai – 600 025
- India
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Durgalakshmi D, Rakkesh RA, Aruna P, Ganesan S, Balakumar S. Bioactivity and hemocompatibility of sol–gel bioactive glass synthesized under different catalytic conditions. NEW J CHEM 2020. [DOI: 10.1039/d0nj02445g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In bioactive glass synthesis by sol–gel method, HCl catalyst induces biocompatible wollastonite crystallization and supports higher apatite formation.
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Affiliation(s)
- D. Durgalakshmi
- Department of Medical Physics, Anna University
- Chennai – 600 025
- India
| | - R. Ajay Rakkesh
- CAS in Crystallography and Biophysics, University of Madras
- Chennai – 600 025
- India
| | - P. Aruna
- Department of Medical Physics, Anna University
- Chennai – 600 025
- India
| | | | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras
- Chennai – 600 025
- India
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Durgalakshmi D, Ajay Rakkesh R, Kamil S, Karthikeyan S, Balakumar S. Rapid Dilapidation of Alcohol Using Magnesium Oxide and Magnesium Aspartate based Nanostructures: A Raman Spectroscopic and Molecular Simulation Approach. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01105-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Durgalakshmi D, Ajay Rakkesh R, Kesavan M, Ganapathy S, Ajithkumar TG, Karthikeyan S, Balakumar S. Highly reactive crystalline-phase-embedded strontium-bioactive nanorods for multimodal bioactive applications. Biomater Sci 2018; 6:1764-1776. [PMID: 29808842 DOI: 10.1039/c8bm00362a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In the present work, a crystallization-induced strontium-bioactive material, with a composition similar to Bioglass 45S5 system, was obtained using a sol-gel-assisted microwave method with nanorod morphologies of 30-80 nm in size. The effect of crystallization induced in the glass network, and its influence on the bioactivity and mechanical properties of bone and dentin regeneration, were the main novel findings of this work. Rietveld analysis of X-ray diffraction spectra showed the best fit with sodium (combeite, Na2Ca2Si3O9) and calcium (clinophosinaite, Ca2Na6O14P2Si2; calcium strontium silicate, Ca1.5O4SiSr0.5; and calcium carbonate, CaCO3) enriched crystal systems. Multinuclear solid-state NMR studies provided detailed atomistic insight into the presence of crystalline mineral phases in the bioactive material. The dentin matrix and antibacterial studies showed good results for 5% strontium-substituted calcium compared with basic 45S5 composition due to its smaller particle size (30 nm), which suggested applications to dentin regeneration. Simulation studies have been demonstrated with clinophosinaite crystal data from the XRD spectra, with the glycoprotein salivary metabolites also showing that 5% strontium-substituted calcium has a higher binding affinity for the salivary compound, which is suitable for dentin regeneration applications. In vitro apatite formation studies showed that this material is suitable for bone regeneration applications.
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Affiliation(s)
- D Durgalakshmi
- National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai, India.
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Bargavi P, Chitra S, Durgalakshmi D, Rajashree P, Balakumar S. Effect of Titania Concentration in Bioglass/TiO₂ Nanostructures and Its In Vitro Biological Property Assessment. J Nanosci Nanotechnol 2018; 18:4746-4754. [PMID: 29442653 DOI: 10.1166/jnn.2018.15340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bioglass 45S5 (45% SiO2-24.5% NaO-24.5% CaO-6% P2O5) is a unique bioactive material, which is being used for bone and dental substitution. This system has been highly preferred for its osteoconductive and osteoinductive performance. Despite its attractive bioactivity, there are limitations in using this material for orthopedic and dental applications due to its poor processability and mechanical strength. To improve the load-sharing and stress distribution, TiO2 nanoparticles have been introduced into the nanoBioglass (nBG) by sol-gel method. The structural analyses of the samples were confirmed using X-ray diffraction, Raman-spectroscopy and FTIR. The morphologies of the samples were characterized by FESEM. The apatite formation of the nBG/TiO2 composites was investigated by immersing the samples in simulated body Fluid (SBF) solution for 1 and 3 days, which reveals the acceptable compatibility for different concentrations of all the composition. Hemolysis studies of the nanobiomaterials were carried out to understand the interactions of biomaterials with blood which shows 0.2%-2% of lysis which is acceptable as per ASTM standard. Cell culture and cell proliferation studies of bioglass, nBG/TiO2 nanocomposite on MG-63 pre-osteoblast cell line for 24 h, 48 h and 72 h showed 80% to 95% of cell viability. Also, it was found that the nBG/TiO2 bio-nanocomposites containing low content of titania had good bioactivity properties that is comparable to cortical bone. Hence, nBG/TiO2 bio-nanocomposites are greatly promising for medical applications such as bone substitutes especially in load-bearing sites.
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Affiliation(s)
- P Bargavi
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai 600025, India
| | - S Chitra
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai 600025, India
| | - D Durgalakshmi
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai 600025, India
| | - P Rajashree
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai 600025, India
| | - S Balakumar
- National Centre for Nanoscience and Nanotechnology, University of Madras, Guindy Campus, Chennai 600025, India
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Rakkesh RA, Durgalakshmi D, Balakumar S. Graphene based nanoassembly for simultaneous detection and degradation of harmful organic contaminants from aqueous solution. RSC Adv 2016. [DOI: 10.1039/c6ra01784c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene based nanoassemblies that can simultaneously detect and degrade harmful organic contaminants from water are important for conquering the risk of hazardous chemicals.
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Affiliation(s)
- R. Ajay Rakkesh
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy Campus
- Chennai 600 025
- India
| | - D. Durgalakshmi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy Campus
- Chennai 600 025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy Campus
- Chennai 600 025
- India
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19
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Ashok raja C, Balakumar S, Durgalakshmi D, George RP, Anandkumar B, Kamachi Mudali U. Reduced graphene oxide/nano-Bioglass composites: processing and super-anion oxide evaluation. RSC Adv 2016. [DOI: 10.1039/c5ra27160f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
45S5 Bioglass with a mean particle size in the nano regime was synthesized and fabricated with rGO sheets using three different strategies.
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Affiliation(s)
- C. Ashok raja
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
| | - D. Durgalakshmi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
| | - R. P. George
- Corrosion Science and Technology Division
- Materials Characterization Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102
- India
| | - B. Anandkumar
- Corrosion Science and Technology Division
- Materials Characterization Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102
- India
| | - U. Kamachi Mudali
- Corrosion Science and Technology Division
- Materials Characterization Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam 603 102
- India
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Durgalakshmi D, Balakumar S, Raja CA, George RP, Mudali UK. Structural, Morphological and Antibacterial Investigation of Ag-Impregnated Sol-Gel-Derived 45S5 NanoBioglass Systems. J Nanosci Nanotechnol 2015; 15:4285-4295. [PMID: 26369040 DOI: 10.1166/jnn.2015.9724] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An increasing percentage of ageing population requires 30-year survivability of orthopedic devices that is not possible with the current bioinert materials, having a maximum of 15-year survivability. To satisfy this growing need, a shift is needed from replacement of tissues to regeneration of tissues. This is highly possible through the use of silica-bioactive glasses. However, a failure of implant can occur due to infections even by using such materials. Advances in using silver for antibacterial applications have been commercialized. However, higher concentrations of silver also lead to toxic effects. In this study, nanoBioglass 45S5 (NBG) and Ag-NBG were synthesized by using sol-gel method followed by solution-phase method, respectively. The bioactive crystals such as Na2Ca2Si3O9, CaCO3, and AgPO3, very much needed in the field of bone tissue engineering and in antibacterial strategies, were obtained in the NBG Matrix. The morphological investigation of NBG with 1 mM Ag+ concentrations shows the nanospikes arrangement of size 30-40 nm with spherical porous structure of size 10-20 nm, which supports the formation of collagen molecular fibrils on the surface of NBG matrices and enhances osseointegration. Both gram-positive and gram-negative strains show higher antibacterial activity for nanoBioglass with 1 mM Ag+ concentration.
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Durgalakshmi D, Balakumar S. Phase separation induced shell thickness variations in electrospun hollow Bioglass 45S5 fiber mats for drug delivery applications. Phys Chem Chem Phys 2015; 17:15316-23. [DOI: 10.1039/c5cp01738f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hollow fiber mats obtained by an electrospinning technique show higher apatite formation, and they can also be used for drug delivery applications.
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Affiliation(s)
- D. Durgalakshmi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
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Durgalakshmi D, Balakumar S. Analysis of solvent induced porous PMMA–Bioglass monoliths by the phase separation method – mechanical and in vitro biocompatible studies. Phys Chem Chem Phys 2015; 17:1247-56. [DOI: 10.1039/c4cp03515a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bone microstructure and its mechanical properties are mimicked by PMMA–Bioglass monoliths fabricated by the phase separation method.
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Affiliation(s)
- D. Durgalakshmi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Chennai 600025
- India
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Ajay Rakkesh R, Durgalakshmi D, Balakumar S. Nanostructuring of a GNS-V2O5–TiO2 core–shell photocatalyst for water remediation applications under sun-light irradiation. RSC Adv 2015. [DOI: 10.1039/c5ra00180c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The GNS-V2O5–TiO2 composite, as a new class of nanoarchitecture, has been successfully fabricated by a facile hydrothermal process followed by a sol–gel technique.
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Affiliation(s)
- R. Ajay Rakkesh
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy campus
- Chennai 600025
- India
| | - D. Durgalakshmi
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy campus
- Chennai 600025
- India
| | - S. Balakumar
- National Centre for Nanoscience and Nanotechnology
- University of Madras
- Guindy campus
- Chennai 600025
- India
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