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Dutta A, Begum W, Sarkar S, Dam S, Mandal U. Highly Luminescent Nitrogen Doped Carbon Quantum Dots for Mercury Ion Sensing with Antibacterial Activity. J Fluoresc 2025:10.1007/s10895-024-04119-4. [PMID: 39798020 DOI: 10.1007/s10895-024-04119-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2024] [Accepted: 12/27/2024] [Indexed: 01/13/2025]
Abstract
Nitrogen doped Carbon Quantum Dots (NCQDs) have been synthesized using most economical and easiest hydrothermal process. Here, N-phenyl orthophenylenediamine and citric acid were utilised as a source of nitrogen and carbon for the preparation of NCQDs. The synthesized NCQDs were characterized using experimental techniques like UV - Vis absorption, FT-IR, transmission electron microscopy (TEM), X-ray Diffraction (XRD), EDX, dynamic light scattering (DLS), fluorimeter and time resolved fluorescence spectroscopy. Measured quantum yield of the NCQDs was ~ 50.5%. TEM image represented that the NCQDs were quasi-spherical shaped with average size of 3.5 nm. This nitrogen doped carbon quantum dots have been used to study their bactericidal activity against representative Gram-negative (E. coli and P. aeruginosa) and Gram-positive (B. subtilis and S. aureus) bacterial strains using the agar well diffusion method. Results demonstrated that synthesized Nitrogen doped carbon quantum dots have been found to exhibit maximum antibacterial activity against S. aureus with good inhibitory effect with inhibition range from 2 mg mL- 1 to 3 mg mL- 1. These Nitrogen doped carbon quantum dots have also been used as fluorescence probe for sensitive and selective detection of mercury. The emission intensity of carbon quantum dots has drastically quenched by Hg2+ ion. Observed limit of detection (LOD) was found to be 4.98 nM, much below than the approved limit prescribed by Environmental Protection Agency. Hence the synthesized NCQDs play an important role in monitoring the antibacterial effect as well as water quality.
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Affiliation(s)
- Ankita Dutta
- Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, 713104, India
| | - Wasefa Begum
- Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, 713104, India
| | - Subhasish Sarkar
- Department of Microbiology, The University of Burdwan, Golapbag, Burdwan, 713104, India
| | - Somasri Dam
- Department of Microbiology, The University of Burdwan, Golapbag, Burdwan, 713104, India
| | - Ujjwal Mandal
- Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, 713104, India.
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Scarpa D, Cirillo C, Luciano C, Nigro A, Adami R, Cirillo C, Attanasio C, Iuliano M, Ponticorvo E, Sarno M. Rough and Porous Micropebbles of CeCu 2Si 2 for Energy Storage Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7182. [PMID: 38005111 PMCID: PMC10672998 DOI: 10.3390/ma16227182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
Supercapacitors have attracted considerable attention due to their advantages, including being lightweight and having rapid charge-discharge, a good rate capability, and high cyclic stability. Electrodes are one of the most important factors influencing the performance of supercapacitors. Herein, a three-dimensional network of rough and porous micropebbles of CeCu2Si2 has been prepared using a one-step procedure and tested for the first time as a supercapacitor electrode. The synthesized material was extensively characterized in a three-electrode configuration using different electrochemical techniques, such as cyclic voltammetry (CV), galvanostatic charge and discharge (GCD) tests, and electrochemical impedance spectroscopy (EIS). CeCu2Si2 shows rather high mass-capacitance values: 278 F/g at 1 A/g and 295 F/g at 10 mV/s. Moreover, the material exhibits remarkable long-term stability: 98% of the initial capacitance was retained after 20,000 cycles at 10 A/g and the Coulombic efficiency remains equal to 100% at the end of the cycles.
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Affiliation(s)
- Davide Scarpa
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Claudia Cirillo
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Christopher Luciano
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Angela Nigro
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Renata Adami
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Carla Cirillo
- CNR-SPIN, c/o University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;
| | - Carmine Attanasio
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Mariagrazia Iuliano
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Eleonora Ponticorvo
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Maria Sarno
- Department of Physics “E.R. Caianiello”, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy; (C.C.); (C.L.); (A.N.); (R.A.); (C.A.); (M.I.); (E.P.); (M.S.)
- NANO_MATES Research Centre, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
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Chang D, Zhao Z, Niu W, Shi L, Yang Y. Iron ion sensing and in vitro and in vivo imaging based on bright blue-fluorescent carbon dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 260:119964. [PMID: 34052767 DOI: 10.1016/j.saa.2021.119964] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/20/2021] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
Herein, we propose an eco-friendly synthesis of carbon dots (CDs) and ingeniously design a rapid and label-free "turn-off" sensing platform for ultrasensitive recognition of Fe3+ in vitro and in vivo. CDs with extraordinary advantages involving exceptional stability, ultra-low toxicity as well as admirable biocompatibility were simply prepared via one-step hydrothermal strategy of Caulis polygoni multiflora. Result indicated that as-acquired CDs not only exhibit excitation dependency, but also have a high quantum yield of (QY) up to 42%. Miraculously, the fluorescence of CDs can be extinguished sharply by Fe3+ because of static quenching effect with linear range of 0-400 µM, yielding a detection limit of 0.025 μM. Benefiting from these characteristics, CDs have been extended for multicolourful imaging and tracking Fe3+ fluctuations in living cells. Bioimaging of zebrafish larvae exposed to CDs confirmed that it is smoothly circulated to other tissues and organs owing to their small size. Eventually, as-prepared CDs have been implemented for the real-time detection of Fe3+ in nude mice.
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Affiliation(s)
- Dan Chang
- Department of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Zhonghua Zhao
- Institute of Biomedical Science, Shanxi University, Taiyuan 030006, China
| | - Wenjing Niu
- Department of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Lihong Shi
- Department of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
| | - Yongxing Yang
- Department of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
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Zhang M, Zhai X, Sun M, Ma T, Huang Y, Huang B, Du Y, Yan C. When rare earth meets carbon nanodots: mechanisms, applications and outlook. Chem Soc Rev 2020; 49:9220-9248. [PMID: 33165456 DOI: 10.1039/d0cs00462f] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Rare earth (RE) elements are widely used in the luminescence and magnetic fields by virtue of their abundant 4f electron configurations. However, the overall performance and aqueous stability of single-component RE materials need to be urgently improved to satisfy the requirements for multifunctional applications. Carbon nanodots (CNDs) are excellent nanocarriers with abundant functional surface groups, excellent hydrophilicity, unique photoluminescence (PL) and tunable features. Accordingly, RE-CND hybrids combine the merits of both RE and CNDs, which dramatically enhance their overall properties such as luminescent and magnetic-optical imaging performances, leading to highly promising practical applications in the future. Nevertheless, a comprehensive review focusing on the introduction and in-depth understanding of RE-CND hybrid materials has not been reported to date. This review endeavors to summarize the recent advances of RE-CNDs, including their interaction mechanisms, general synthetic strategies and applications in fluorescence, biosensing and multi-modal biomedical imaging. Finally, we present the current challenges and the possible application perspectives of newly developed RE-CND materials. We hope this review will inspire new design ideas and valuable references in this promising field in the future.
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Affiliation(s)
- Mengzhen Zhang
- Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.
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