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Fallah Talooki E, Ghorbani M, Rahimnejad M, Soleimani Lashkenari M. Assessment of the effective parameters for the enhancement of light-harvesting power in the photoelectrochemical microbial fuel cell. ENVIRONMENTAL TECHNOLOGY 2024; 45:3737-3750. [PMID: 37327312 DOI: 10.1080/09593330.2023.2227390] [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: 01/27/2023] [Accepted: 06/12/2023] [Indexed: 06/18/2023]
Abstract
Photo-assisted microbial fuel cells (PMFCs) are novel bioelectrochemical systems that employ light to harvest bioelectricity and efficient contaminant reduction. In this study, the impact of different operational conditions on the electricity generation outputs in a photoelectrochemical double chamber configuration Microbial fuel cell using a highly useful photocathode are evaluated and their trends are compared with the photoreduction efficiency trends. As a photocathode, a binder-free photo electrode decorated with dispersed polyaniline nanofiber (PANI)-cadmium sulphide Quantum Dots (QDs) is prepared here to catalyse the chromium (VI) reduction reaction in a cathode chamber with an improvement in power generation performance. Bioelectricity generation is examined in various process conditions like photocathode materials, pH, initial concentration of catholyte, illumination intensity and time of illumination. Results show that, despite the harmful effect of the initial contaminant concentration on the reduction efficiency of the contaminant, this parameter exhibits a superior ability for improving the power generation efficiency in a Photo-MFC. Furthermore, the calculated power density under higher light irradiation intensity has experienced a significant increase, which is due to an increment in the number of photons produced and an increase in their chance of reaching the electrodes surface. On the other hand, additional results indicate that the power generation decreases with the rise of pH and has witnessed the same trend as the photoreduction efficiency.
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Affiliation(s)
- Elahe Fallah Talooki
- Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Mohsen Ghorbani
- Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Mostafa Rahimnejad
- Biofuel and Renewable Energy Research Center, Chemical Engineering Department, Babol Noshirvani University of Technology, Babol, Iran
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2
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Sakthivel P, Mangalaraja RV, Ramalingam G, Sakthipandi K, Gowtham V. Synthesis, Structure, Morphology, Element composition, Electrochemical, and Optical studies of Zn 0.98-XMn 0.02Ce X Quantum dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123140. [PMID: 37463553 DOI: 10.1016/j.saa.2023.123140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/20/2023]
Abstract
Quantum dots (QDs) are semiconductors whose size falls in a range between 1 and 10 nm; they are generally known as zero-dimension materials. It finds various applications in optical industries including light-emitting diodes, display technology, imaging, and labelling. ZnS is one of the excellent QDs in its class of II-VI semiconductors. In this paper, It is reported that the preparation of Mn-doped ZnS and Mn, Ce co-doped ZnS QDs using facile co-precipitation technique. XRD and HR-TEM results confirmed the cubic structure, particle size, and phase of the synthesized particles, and the crystallite is measured as ∼ 2 nm. The surface morphology, elemental analysis, and FT-IR spectra revealed the purity of the samples and confirmed the presence of dopants as expected. Cyclic voltammetry studies expressed the electrochemical behaviour of the samples, which increased as a function of Ce3+ doping concentration. UV-visible absorbance and transmittance spectra disclosed the optical characteristics of the samples. A wide band gap (4.02 eV) was received for 2% Ce-doped Zn: MnS QDs. Week Blue and strong yellow emissions were received for 4% Ce-doped Zn:MnS QDs. Whereas, high intensity red-emission was received for 2% Ce-doped Zn:MnS QDs. The different colour emissions are discussed in terms of defects produced.
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Affiliation(s)
- P Sakthivel
- Centre for Materials Science, Department of Physics, Science and Humanities, Faculty of Engineering, Karpagam Academy of Higher Education, Coimbatore - 641 021, Tamil Nadu, India.
| | - R V Mangalaraja
- Faculty of Engineering and Sciences, Universidad Adolfo Ibáñez, Diagonal las Torres, 2640, Peñalolén, Santiago, Chile
| | - G Ramalingam
- Quantum Materials Research Lab (QMRL), Department of Nanoscience and Technology, Alagappa University, Karaikudi - 630 003, Tamil Nadu, India
| | - K Sakthipandi
- Department of Physics, SRM TRP Engineering College, Tiruchirappalli 621 105, India
| | - V Gowtham
- Centre for Materials Science, Department of Physics, Science and Humanities, Faculty of Engineering, Karpagam Academy of Higher Education, Coimbatore - 641 021, Tamil Nadu, India
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Qurtulen, Ahmad A. Green tea waste-derived carbon dots: efficient degradation of RhB dye and selective sensing of Cu 2+ ions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:121630-121646. [PMID: 37957492 DOI: 10.1007/s11356-023-30735-x] [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: 08/15/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023]
Abstract
Herein, we have synthesized carbon dots (CDs) using a one-step hydrothermal method from green tea waste, a biomass-derived source with high fluorescent properties and excellent solubility in water. The synthesis of CDs was confirmed through a comprehensive range of characterization techniques, including HRTEM (high-resolution transmission electron microscopy), XPS (X-ray photoelectron spectroscopy), and EDX (energy-dispersive X-ray spectroscopy). The optical properties of the synthesized CDs were assessed using UV-Vis spectroscopy and fluorescence (FL) spectroscopy. The CDs displayed exceptional stability across a wide pH range and various concentrations. Moreover, these CDs exhibited a photoluminescence quantum yield (PLQY) of 21.6%, indicating their efficiency in emitting fluorescent light upon excitation. The CDs also showcased their prowess in fluorometrically detecting Cu2+ ions, displaying high sensitivity and selectivity. They presented two distinct linear ranges: 0.02 to 50 µM and 50 to 100 µM, with recovery rates ranging from 94.2 to 104.06%. Moreover, under visible light irradiation, the CDs exhibited significant efficiency in the photocatalytic removal of dyes. Specifically, the CDs achieved degradation rate of 97.89% for Rhodamine B (RhB) within a 30-min irradiation period. In the context of RhB adsorption, it is evident that the experimental data align more closely with the Freundlich isotherm than the Langmuir isotherm. This is substantiated by a higher R2 value (0.97) for the Freundlich isotherm model compared to the Langmuir adsorption isotherm model (0.93). Notably, the adsorption kinetics was effectively described by pseudo first-order kinetics models. Overall, these results highlight the promising potential of CDs in applications such as environmental remediation and waste treatment processes due to their photocatalytic and sensing capabilities.
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Affiliation(s)
- Qurtulen
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India.
| | - Anees Ahmad
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India
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Vinitha V, Preeyanghaa M, Anbarasu M, Neppolian B, Sivamurugan V. Chemical recycling of polyester textile wastes using silver-doped zinc oxide nanoparticles: an economical solution for circular economy. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27567-0. [PMID: 37217818 DOI: 10.1007/s11356-023-27567-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 05/05/2023] [Indexed: 05/24/2023]
Abstract
The waste management of polyethylene terephthalate (PET)-derived polyester (PES) textile is a global issue, and material recovery through chemical recycling can restore a circular economy. In our investigation, microwave-induced catalytic aminolysis and glycolysis of PES textile wastes using Ag-doped ZnO nanoparticles have been proposed. Ag-doped ZnO is prepared by the sol-gel method and characterised by XRD, FT-IR, UV-Vis, SEM-EDX and TEM. The reaction parameters such as PET-to-catalyst ratio, microwave power and irradiation time, temperature and catalyst recycling have been optimised. The catalyst was found to be more stable and could be recycled up to six times without losing its activity. Both the aminolysis and glycolysis of PES showed 100% conversion and afforded of bis (2-hydroxy ethylene) terephthalamide (BHETA) and bis (2-hydroxy ethylene) terephthalate (BHET), respectively. The depolymerisation of PES wastes using Ag-doped ZnO afforded BHETA and BHET for about 95 and 90%, respectively. The monomers BHET and BHETA confirmed by FT-IR, 1H NMR and mass spectroscopy. According to the findings, 2 mol% Ag-doped ZnO has higher catalytic activity.
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Affiliation(s)
- Viswanathan Vinitha
- PG and Research Department of Chemistry, Pachaiyappa's College, Chennai, 600 030, India
| | - Mani Preeyanghaa
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, India
| | - Murugan Anbarasu
- PG and Research Department of Chemistry, Pachaiyappa's College, Chennai, 600 030, India
| | - Bernaurdshaw Neppolian
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, India
| | - Vajiravelu Sivamurugan
- PG and Research Department of Chemistry, Pachaiyappa's College, Chennai, 600 030, India.
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5
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Amiri S, Vatanpour V, He T. Antifouling thin-film nanocomposite NF membrane with polyvinyl alcohol-sodium alginate-graphene oxide nanocomposite hydrogel coated layer for As(III) removal. CHEMOSPHERE 2023; 322:138159. [PMID: 36812992 DOI: 10.1016/j.chemosphere.2023.138159] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Removal of As(III) from the polluted waters is a challenge. It should be oxidized to As(V) for increasing its rejection by RO membranes. However, in this research, As (III) is directly removed by a high permeable and antifouling membrane prepared through the surface coating and in-situ crosslinking procedure of polyvinyl alcohol (PVA) and sodium alginate (SA) as coating materials containing graphene oxide as a hydrophilic additive on a polysulfone support with glutaraldehyde (GA) chemical crosslinking agent. The properties of the prepared membranes were evaluated through contact angle, zeta potential, ATR-FTIR, SEM, and AFM. The addition of GO in the polymeric networks of SA and PVA hydrogel coating layers led to a better hydrophilicity and a smoother surface and a higher negative surface charge resulted in improvment of permeability and rejection of membranes. Among the prepared hydrogel-coated modified membranes, SA-GO/PSf indicated the highest pure water permeability (15.8 L m-2 h-1 bar-1) and BSA permeability (9.57 L m-2 h-1 bar-1), respectively. The best desalination performance (NaCl, MgSO4, and Na2SO4 rejections of 60.0%, 74.5%, and 92.0%, respectively) and As(III) removal (88.4%) along with satisfactory stability and reusability in cyclic continuous filtration was reported for PVA-SA-GO membrane. In addition, the PVA-SA-GO membrane indicated improved fouling resistance toward BSA foulant with the lowest flux decline of 7%.
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Affiliation(s)
- Saba Amiri
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911, Tehran, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911, Tehran, Iran; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey.
| | - Tao He
- Laboratory for Membrane Materials and Separation Technologies, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
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Das C, Sillanpää M, Zaidi SA, Khan MA, Biswas G. Current trends in carbon-based quantum dots development from solid wastes and their applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:45528-45554. [PMID: 36809626 PMCID: PMC9942668 DOI: 10.1007/s11356-023-25822-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Urbanization and a massive population boom have immensely increased the solid wastes (SWs) generation and are expected to reach 3.40 billion tons by 2050. In many developed and emerging nations, SWs are prevalent in both major and small cities. As a result, in the current context, the reusability of SWs through various applications has taken on added importance. Carbon-based quantum dots (Cb-QDs) and their many variants are synthesized from SWs in a straightforward and practical method. Cb-QDs are a new type of semiconductor that has attracted the interest of researchers due to their wide range of applications, which include everything from energy storage, chemical sensing, to drug delivery. This review is primarily focused on the conversion of SWs into useful materials, which is an essential aspect of waste management for pollution reduction. In this context, the goal of the current review is to investigate the sustainable synthesis routes of carbon quantum dots (CQDs), graphene quantum dots (GQDs), and graphene oxide quantum dots (GOQDs) from various types SWs. The applications of CQDs, GQDs, and GOQDs in the different areas are also been discussed. Finally, the challenges in implementing the existing synthesis methods and future research directions are highlighted.
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Affiliation(s)
- Chanchal Das
- Department of Chemistry, Cooch Behar Panchanan Barma University, West Bengal, Cooch Behar, 736101, India
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, South Africa
| | - Shabi Abbas Zaidi
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
| | - Moonis Ali Khan
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Goutam Biswas
- Department of Chemistry, Cooch Behar Panchanan Barma University, West Bengal, Cooch Behar, 736101, India
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Rahmat M, Kiran S, Gulzar T, Yusuf M, Nawaz R, Khalid J, Fatima N, Ullah A, Azam M. Plant-assisted synthesis and characterization of MnO 2 nanoparticles for removal of crystal violet dye: an environmental remedial approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:57587-57598. [PMID: 36971936 DOI: 10.1007/s11356-023-26601-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 03/17/2023] [Indexed: 05/10/2023]
Abstract
The current study is focused on the use of the Caryota mitis Lour. (Fishtail palm) flower extract as a reducing agent for the preparation of manganese dioxide (MnO2) nanoparticles. Scanning electron microscopy (SEM), four-phase infrared analysis (FT-IR), and x-ray diffraction (XRD) methods were used to characterize the MnO2 nanoparticles. The nature of MnO2 nanoparticles was revealed by an absorption peak at 590 nm in a spectrophotometer (A1000). Then, these MnO2 nanoparticles were applied to decolorize the crystal violet dye. At 0.004% dye concentration, pH 4, and concentration of MnO2 nanoparticles of 0.005 g/L at temperatures of 50 °C, the target dye was decolorized by 91.3%. Percent reductions in COD and TOC were found to be 92.1% and 90.6%, respectively. Finally, the dye decolorization pathway was proposed based on the experimental findings.
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Affiliation(s)
- Muniba Rahmat
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Shumaila Kiran
- Department of Applied Chemistry, Government College University, Faisalabad, Pakistan.
| | - Tahsin Gulzar
- Department of Applied Chemistry, Government College University, Faisalabad, Pakistan
| | - Mohd Yusuf
- Department of Natural and Applied Sciences, School of Science and Technology, The Glocal University, Saharanpur, Uttar Pradesh, 247121, India
| | - Rabia Nawaz
- Department of Applied Chemistry, Government College University, Faisalabad, Pakistan
| | - Javaira Khalid
- Department of Applied Chemistry, Government College University, Faisalabad, Pakistan
| | - Nooria Fatima
- Department of Applied Chemistry, Government College University, Faisalabad, Pakistan
| | - Ata Ullah
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Jhang Road, Faisalabad, Pakistan
| | - Muhammad Azam
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
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Isac L, Enesca A. Recent Developments in ZnS-Based Nanostructures Photocatalysts for Wastewater Treatment. Int J Mol Sci 2022; 23:ijms232415668. [PMID: 36555309 PMCID: PMC9779750 DOI: 10.3390/ijms232415668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/01/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
The continuous growth of the world population has led to the constant increase of environmental pollution, with serious consequences for human health. Toxic, non-biodegradable, and recalcitrant organic pollutants (e.g., dyes, pharmaceuticals, pesticides) are discharged into water resources from various industries, such as textiles, leather, pharmaceuticals, plastics, etc. Consequently, the treatment of industrial wastewater, via a sustainable technology, represents a great challenge for worldwide research. Photocatalytic technology, an innovative technique based on advanced oxidation process (AOP), is considered a green technology with promising prospects in the remediation of global environmental issues. In photocatalysis, a very important role is attributed to the photocatalyst, usually a semiconductor material with high solar light absorption capacity and conductivity for photogenerated-charge carriers. Zinc sulfide (ZnS), as n-type semiconductor with different morphologies and band gap energies (Eg = 3.2-3.71 eV), is recognized as a promising photocatalyst for the removal of organic pollutants from wastewater, especially under UV light irradiation. This review deals with the recent developments (the last five years) in ZnS nanostructures (0D, 1D, 3D) and ZnS-based heterojunctions (n-n, n-p, Z scheme) used as photocatalysts for organic pollutants' degradation under simulated (UV, Vis) and sunlight irradiation in wastewater treatment. The effects of different synthesis parameters (precursors' type and concentration, capping agents' dosages, reaction time and temperature, metal doping, ZnS concentration in heterostructures, etc.) and properties (particle size, morphology, band gap energy, and surface properties) on the photocatalytic performance of ZnS-based photocatalysts for various organic pollutants' degradation are extensively discussed.
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Affiliation(s)
- Luminita Isac
- Product Design, Mechatronics, and Environmental Department, Transilvania University of Brasov, 500036 Brasov, Romania
- Renewable Energy Systems and Recycling Research Center, Transilvania University of Brasov, 500036 Brasov, Romania
- Correspondence:
| | - Alexandru Enesca
- Product Design, Mechatronics, and Environmental Department, Transilvania University of Brasov, 500036 Brasov, Romania
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Eryildiz B, Keskin B, Pasaoglu ME, Turken T, Vatanpour V, Koyuncu I. Preparation and characterization of polyvinyl chloride membranes and their fouling behavior in water purification. J Appl Polym Sci 2022. [DOI: 10.1002/app.53496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bahriye Eryildiz
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Basak Keskin
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Mehmet Emin Pasaoglu
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Turker Turken
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Vahid Vatanpour
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
- Department of Applied Chemistry, Faculty of Chemistry Kharazmi University Tehran Iran
| | - Ismail Koyuncu
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
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Permeability improvement of reverse osmosis membranes by addition of dimethyl sulfoxide in the interfacial polymerization media. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105436] [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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Enhanced negative charge of polyamide thin-film nanocomposite reverse osmosis membrane modified with MIL-101(Cr)-Pyz-SO3H. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Zhu T, Cao L, Kou X, Liu Y, Dong WF, Ge M, Li L. Nitrogen-doped cyan-emissive carbon quantum dots for fluorescence tetracycline detection and lysosome imaging. RSC Adv 2022; 12:33761-33771. [PMID: 36505714 PMCID: PMC9685596 DOI: 10.1039/d2ra04945g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022] Open
Abstract
Tetracyclines (TCs) prevent the growth of peptide chains and the synthesis of proteins, and they are widely used to inhibit Gram-positive and -negative bacteria. For the detection of tetracyclines in cell and in vitro, a convenient and simple detection system based on nitrogen-doped cyan carbon quantum dots (C-CQDs) was developed. C-CQDs have excellent excitation-independent properties, the best optimal excitation peak is 360 nm and the best emission peak is 480 nm. Based on the inner filter effect (IFE), the fluorescence intensity of C-CQDs in solution decreases with the increase of tetracyclines. In the range of 0-100 μM, C-CQDs present a good linear relationship with three tetracyclines (CTC, TET, OCT), with R 2 all greater than 0.999. C-CQDs can detect tetracycline in milk samples with recovery in the range of 98.2-103.6%, which demonstrates their potential and broad application in real samples. Furthermore, C-CQDs exhibit excellent lysosomal targeting, as indicated by a Pearson's coefficient of 0.914 and an overlap of 0.985. The internalisation of C-CQDs was mainly affected by lipid raft-mediated endocytosis in endocytic pathway experiments. These experiments indicate that C-CQDs can be effectively used to detect TC content and target lysosomes as an alternative to commercial dyes.
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Affiliation(s)
- Tongtong Zhu
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of ChinaHefei 230026P. R. China,CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Lei Cao
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of ChinaHefei 230026P. R. China,CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Xinyue Kou
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of ChinaHefei 230026P. R. China,CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Yulu Liu
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of ChinaHefei 230026P. R. China,CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Wen-Fei Dong
- School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of ChinaHefei 230026P. R. China,CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Mingfeng Ge
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China
| | - Li Li
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS)Suzhou 215163P. R. China,Chongqing Guoke Medical Technology Development Co., LtdChongqing 401122China,Zhengzhou Institute of Biomedical Engineering and TechnologyZhengzhouHenan 450001China
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13
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Study the effect of loading non-stoichiometric zinc sulfide on optical characteristics of PVA/CMC/PVP blended polymer films. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03256-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Mukherjee D, Das P, Kundu S, Mandal B. Engineering of graphene quantum dots by varying the properties of graphene oxide for fluorescence detection of picric acid. CHEMOSPHERE 2022; 300:134432. [PMID: 35398072 DOI: 10.1016/j.chemosphere.2022.134432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 03/14/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
The study examines the effect of different forms of graphene oxide (GO) on the synthesis of graphene quantum dots (GQD). GO synthesized at various temperatures i.e. 30, 50, 110 °C possessed different structural and functional properties and was used as a substrate for GQD preparation. Thorough characterization of the GQDs in terms of their structural, morphological, functional, and optical properties was performed. The GQDs exhibited variation in their size and fluorescence properties depending upon the type of GO used. Hydrothermal reduction of GO, prepared at an oxidation temperature of 50 °C (GO-50), minimized the particle size (3.6 nm) and maximized the photoluminescence (PL) intensity and quantum yield (64.8%) of the GQD (GQD-50). GQD-50 was found to detect picric acid (PA) in an aqueous solution via 'turn-off' fluorescence quenching, unlike the other GQDs where the initial precursor is synthesized at 30, 110 °C. Experimental studies summarize that interaction between the fluorophore-quencher resulted in static quenching. The limit of detection was estimated to be 1.2 μM with a detection range of 0-200 μM. The work concludes that optimization of the substrate i.e. GO can result in the development of a simple, non-toxic, cost-effective GQD based sensor for PA detection. The study eliminates the need for doping/functionalization of GQDs as reported previously, and hence finds a promising impact on the development of sensors.
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Affiliation(s)
- Debarati Mukherjee
- Separation Science Laboratory, Department of Chemical Engineering, India Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
| | - Pradip Das
- Separation Science Laboratory, Department of Chemical Engineering, India Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
| | - Sukanya Kundu
- Separation Science Laboratory, Department of Chemical Engineering, India Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
| | - Bishnupada Mandal
- Separation Science Laboratory, Department of Chemical Engineering, India Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
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