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Mohammad A, Srivastava M, Ahmad I, Singh R, Deen PR, Rai A, Lal B, Srivastava N, Gupta VK. Prospects of graphene quantum dots preparation using lignocellulosic wastes for application in photofermentative hydrogen production. CHEMOSPHERE 2024:142804. [PMID: 39029708 DOI: 10.1016/j.chemosphere.2024.142804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 06/06/2024] [Accepted: 07/06/2024] [Indexed: 07/21/2024]
Abstract
Graphene quantum dots (GQDs) are a novel carbon nanomaterial from the graphene family due to their unique physicochemical properties and diverse range of applications. However, in terms of the sustainable utility of GQDs, their synthesis methods are the main roadblock because of their high production costs and the release of toxic byproducts during the production processes. Thus, the search for sustainable and economical fabrication methods for preparing GQDs is one of the most essential areas of research for their practical applications. In this context, lignocellulosic biomass (LCB) wastes are a prime choice for the fabrication of GQDs due to their high carbon and cellulose content, which are favorable for being employed as precursors and reducing agents Additionally, LCBs are a prime source of potential bioenergy production, which is currently a key research hotspot to combat environmental pollution, global warming, and energy crises. Therefore, the present review provides feasibility for sustainable and environmentally friendly fabrication of GQDs using LCB wastes for their possible utility in cellulosic biofuel production technology improvement. Furthermore, the prospective of using these GQDs as catalysts in bioenergy production for the development of low-cost biomass-based biofuel production technology has been discussed along with the existing limitations and their sustainable recommendation.
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Affiliation(s)
- Akbar Mohammad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Manish Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Irfan Ahmad
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Rajeev Singh
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Prakash Ranjan Deen
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Ashutosh Rai
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Basant Lal
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Neha Srivastava
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom
| | - Vijai Kumar Gupta
- Biorefining and Advance Material Research Center, Scotland's Rural College, West Mains Road, Edinburgh, EH9 3JG, United Kingdom.
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2
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Qiao X, Li L, Liu Q, Zhang Y, Han G, Ben H, Zhao H, Jiang W. Determination of carbohydrate content in kenaf degumming wastewater and converting them to carbon dots. Int J Biol Macromol 2024; 265:130952. [PMID: 38499119 DOI: 10.1016/j.ijbiomac.2024.130952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/08/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
The traditional textile degumming process produces abundant wastewater, which contains a lot of monosaccharides and oligosaccharides. It is of great economic and environmental significance to utilize these carbohydrates in high value. In this study, high performance liquid chromatography (HPLC) was used to analyze the carbohydrate components in kenaf degumming wastewater, and then the production of C-dots using the wastewater was explored. The results showed that the types and content in the degumming wastewater were monosaccharides (glucose, xylose and arabinose) and oligosaccharides (dextran, xylan and araban). The carbohydrate (mainly glucan and xylan) content in wastewater accounted for 91.16 % of the total carbohydrates weight loss in kenaf degumming process. By using hydrolysis and hydrothermal reaction on kenaf degumming wastewater, blue-green carbon dots (C-dots) with good performance were prepared and successfully applied to anti-counterfeiting printing. In particular, the as-prepared C-dots prepared from kenaf degumming wastewater with urea added (WUC-dots) showed an excitation-dependent photoluminescence (PL) spectrum and quantum yield (QY) of 2.4 % in aqueous solution. The fluorescent code exhibited a clear outline, excitation-tunable color and good stability, showing a great potential for anti-counterfeiting system.
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Affiliation(s)
- Xiaolong Qiao
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Linlin Li
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Qiulian Liu
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Yuanming Zhang
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Guangting Han
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Haoxi Ben
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Haiguang Zhao
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
| | - Wei Jiang
- College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
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Patra S, Sahu KM, Mahanty J, Swain SK. Ex Vivo Glucose Detection in Human Blood Serums with Carbon Quantum Dot-Doped Oleic Acid-Treated Chitosan Nanocomposites. ACS APPLIED BIO MATERIALS 2023; 6:5730-5745. [PMID: 37972392 DOI: 10.1021/acsabm.3c00851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Herein, carbon quantum dot (CQD)-doped oleic acid (OL)-treated chitosan (Ch) nanocomposites (Ch-OL/CQD) are prepared by a simple solution technique for nonenzymatic ex vivo detection of glucose in human blood samples. From the architecture of the structure, it is observed that the agglomeration of CQD is restricted by OL-treated Ch polymeric chain, and simultaneously the inhibition in the entanglement of Ch-OL polymeric chains in the matrix is attained by the incorporation of CQD, thereby proving the high stability of the nanocomposite. In vitro detection of glucose is studied by the "Turn ON-OFF" fluorescence technique which is again evidenced by the shining core image of nanocomposites in HRTEM. A highly selective glucose sensing against interfering sugars due to the specific spatial arrangement of the hydroxyl groups of glucose, leading to prominent hydrogen-bonding interaction is established, with a very low limit of detection (LOD) of 1.51 μM, covering a wide linear domain from 0 to 104 μM, R2 = 0.98. Moreover, the calculated glucose levels in real human blood serums by Ch-OL/CQD nanocomposites are compared with a commercial glucometer, with recovery percentages from 95.8 to 107.3%. The clinical potential is supported by studying the stimuli responsiveness of the nanocomposites as a function of pH and ionic strength, encouraging the operation of the sensor in a complex biological scenario. The present work may offer an opportunity for the monitoring of glucose in the blood for successful diabetes management.
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Affiliation(s)
- Swapnita Patra
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India
| | - Krishna Manjari Sahu
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India
| | - Jharana Mahanty
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India
| | - Sarat K Swain
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India
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Dubey P. An overview on animal/human biomass-derived carbon dots for optical sensing and bioimaging applications. RSC Adv 2023; 13:35088-35126. [PMID: 38046631 PMCID: PMC10690874 DOI: 10.1039/d3ra06976a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 11/15/2023] [Indexed: 12/05/2023] Open
Abstract
Over the past decade, carbon dots (CDs) have emerged as some of the extremely popular carbon nanostructures for diverse applications. The advantages of sustainable CDs, characterized by their exceptional photoluminescence (PL), high water solubility/dispersibility, non-toxicity, and biocompatibility, substantiate their potential for a wide range of applications in sensing and biology. Moreover, nature offers plant- and animal-derived precursors for the sustainable synthesis of CDs and their doped variants. These sources are not only readily accessible, inexpensive, and renewable but are also environmentally benign green biomass. This review article presents in detail the production of sustainable CDs from various animal and human biomass through bottom-up synthetic methods, including hydrothermal, microwave, microwave-hydrothermal, and pyrolysis methods. The resulting CDs exhibit a uniform size distribution, possibility of heteroatom doping, surface passivation, and remarkable excitation wavelength-dependent/independent emission and up-conversion PL characteristics. Consequently, these CDs have been successfully utilized in multiple applications, such as bioimaging and the detection of various analytes, including heavy metal ions. Finally, a comprehensive assessment is presented, highlighting the prospects and challenges associated with animal/human biomass-derived CDs for multifaceted applications.
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Affiliation(s)
- Prashant Dubey
- Centre of Material Sciences, Institute of Interdisciplinary Studies (IIDS), University of Allahabad Prayagraj-211002 Uttar Pradesh India
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5
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Chaudhary S, Goyal S, Umar A. Fabrication of biogenic carbon-based materials from coconut husk for the eradication of dye. CHEMOSPHERE 2023; 340:139823. [PMID: 37586494 DOI: 10.1016/j.chemosphere.2023.139823] [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: 04/18/2023] [Revised: 07/31/2023] [Accepted: 08/12/2023] [Indexed: 08/18/2023]
Abstract
The highly biocompatible nature of carbon dots (CQDs) and potential usage in waste water treatment makes them as one of the effective alternative for treating water pollution. Herein, biogenic carbon dots (CQDs) with size range of 2 nm were prepared from waste coconut husk as a precursor source. The hydrophilic nature and higher surface area of as prepared CQDs has further supported the superior adsorption efficiency of more than 90% for Victoria blue B (VB) dye from waste water samples. Different dye adsorption parameters including adsorbate and adsorbent dosage, pH of reaction media and equilibrium time have been optimized and found that 8 mg of adsorbent was sufficient to remove 70 mg VB dye in 4 mL aqueous solution in 60 min at pH = 7. The adsorption kinetic (2nd order) and isotherms (Freundlich-type) were well followed on prepared CQDs. The reusability studies up to 5 times with minimal decrement of 4% confirm the constancy of CQDs for the adsorptive removal of VB. The methodology presents a greener way for overcoming ecological issues with sustainable materials in an economical manner.
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Affiliation(s)
- Savita Chaudhary
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
| | - Sandeep Goyal
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Ahmad Umar
- Department of Chemistry, College of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, 11001, Kingdom of Saudi Arabia
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Gurung S, Neha, Arun N, Joshi M, Jaiswal T, Pathak AP, Das P, Singh AK, Tripathi A, Tiwari A. Dual metal ion (Fe 3+ and As 3+) sensing and cell bioimaging using fluorescent carbon quantum dots synthesised from Cynodon dactylon. CHEMOSPHERE 2023; 339:139638. [PMID: 37524264 DOI: 10.1016/j.chemosphere.2023.139638] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 07/09/2023] [Accepted: 07/22/2023] [Indexed: 08/02/2023]
Abstract
In this study, water dispersible fluorescent carbon quantum dot (CQD) has been synthesised, having an average size of 8.6 ± 0.4 nm using Cynodon dactylon (CD) following microwave assisted green synthetic one-step method. As-prepared CQD fluoresces strongly at 444 nm having a quantum yield of 1% in water when excited at 350 nm. This fluorescence of CQD is sensitive toward As3+ and Fe3+ metal ions. These CQD are utilized for dual metal ion fluorescence sensing; turn-on fluorescence sensing for As3+ and turn-off fluorescence sensing for Fe3+ ions. Limit of detection for As3+ and Fe3+ ions has been found to be 19 nM and 0.10 μM respectively, which is the lowest value reported for As3+ without any functionalization. The adsorption kinetics of As3+ and Fe3+ ions on CQD have been examined using pseudo-first-order-kinetic model revealing that physical adsorption is dominant over chemical processes in this work. For 0.41 g/L and 1.90 g/L dose of CQD, the equilibrium adsorption capacity was found to be 1.57 × 10-6 mg/g, 2.91 × 10-7 mg/g, and 1.01 × 10-5 mg/g, 1.69 × 10-6 mg/g respectively for As3+ and Fe3+ ions. Despite having low quantum yield in water, as-prepared CQD showed low cytotoxicity and good tolerance against photodegradation of biological cells at concentrations lower than 62.5 μg/mL and when the cells are illuminated up to 12 h. Owing to this, the synthesised CQD have been utilized as fluorescent probes for in itro cell imaging.
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Affiliation(s)
- Sweta Gurung
- Department of Physics, School of Physical Sciences, Sikkim University, Gangtok, 737102, India
| | - Neha
- Centre for Genetic Disorders, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Nimmala Arun
- School of Physics, University of Hyderabad, Hyderabad, 500046, India
| | - Mayank Joshi
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Tanya Jaiswal
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Anand P Pathak
- School of Physics, University of Hyderabad, Hyderabad, 500046, India
| | - Parimal Das
- Centre for Genetic Disorders, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Amaresh Kumar Singh
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Ajay Tripathi
- Department of Physics, School of Physical Sciences, Sikkim University, Gangtok, 737102, India.
| | - Archana Tiwari
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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7
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Vyas Y, Chundawat P, Dharmendra D, Chaubisa P, Kumar M, Punjabi PB, Ameta C. Revolutionizing fuel production through biologically synthesized zero-dimensional nanoparticles. NANOSCALE ADVANCES 2023; 5:4833-4851. [PMID: 37705808 PMCID: PMC10496885 DOI: 10.1039/d3na00268c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 07/28/2023] [Indexed: 09/15/2023]
Abstract
The sustainable management of wastewater and the production of clean fuel with a reduced carbon footprint require innovative methods, including photocatalytic degradation of pollutants and hydrogen generation. To achieve this, biosynthesized photocatalysts are necessary, with carbon quantum dots (CQDs) being a promising candidate for achieving this goal. In this study, CQDs were prepared from water caltrop peels and a composite of greenly synthesized CQDs with copper selenide (CuSe) was used for the photocatalytic degradation of pollutants and production of fuel. Thymol blue (TB) and Congo red (CR) were chosen as model dyes for degradation studies, with optimized reaction conditions being determined by varying the dose, pH, intensity, and concentration of dyes. The composite (CuSe@CQDs) showed a degradation rate of 99.4% and 97.8% for TB and CR, respectively, within 60 minutes, with a corresponding hydrogen production rate of 2360 and 1875 μmol g-1 h-1. The yield of hydrogen production using the composite was 35.7 and 29 times greater than that of CuSe alone for TB and CR, respectively. Spectroscopic techniques such as XRD, UV-Vis, FESEM, HRTEM, XPS, FTIR, BET, and TGA were used to characterize the composite, and the results revealed that the composite had superior degradation rates compared to CuSe alone, with the degradation rate being enhanced by about three times. GCMS analysis was used to investigate the intermediate and possible degradation pathways. Overall, this study highlights the potential of biosynthesized CQDs as effective photocatalysts for the sustainable management of wastewater and production of fuel.
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Affiliation(s)
- Yogeshwari Vyas
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
| | - Priyanka Chundawat
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
| | - Dharmendra Dharmendra
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
| | - Purnima Chaubisa
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
| | - Mukesh Kumar
- Department of Chemistry, Sahu Jain Degree College, Affiliated toM. J. P. Rohilkhand University, Bareilly Najibabad Bijnor-246763 India
| | - Pinki B Punjabi
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
| | - Chetna Ameta
- Photochemistry Laboratory, Department of Chemistry, University College of Science, M.L. Sukhadia University Udaipur-313001 Rajasthan India
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Almufarij RS, Mohamed ME. Green Synthesis of a Carbon Quantum Dots-Based Superhydrophobic Membrane for Efficient Oil/Water Separation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5456. [PMID: 37570160 PMCID: PMC10419717 DOI: 10.3390/ma16155456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023]
Abstract
The efficient separation of oil and water is a significant challenge worldwide due to the increasing frequency of industrial oily wastewater. Previous work by our group utilizes biological metal-organic framework-based superhydrophobic (S.P) textile fabric for oil/water separation. However, this system is limited due to the low mechanical stability, so there is a need for producing a more robust S.P membrane for oil/water separation. In this study, we report on the synthesis of carbon quantum dots (CQD) from banana leaves via a hydrothermal process and their application in producing a robust S.P coating on textile fabric for oil/water separation. The CQDs were characterized using various techniques including TEM, XRD, absorbance spectroscopy, and the BET method. The TEM images showed that the CQDs were circular in shape with a size of 4.4 nm, while the XRD micrograph indicated that the CQDs were crystalline in nature. The UV-vis graph showed a peak at a wavelength of 278 nm, suggesting strong absorption in the ultraviolet region. The BET-specific surface area of the prepared CQDs is 845 m2/g, with a pore volume of 0.33 cm3/g, and a mean pore diameter of 1.62 nm. We examined the surface wettability, morphology, composition, oil absorption capacity, oil/water separation performance, flux rate, chemical stability, and mechanical stability of the S.P membrane. Our findings indicate that the developed CQD-based S.P membrane possesses excellent S.P properties, displaying high water contact angles of 163° and low water sliding angles of 1°. The membrane demonstrated superior oil absorption capacity, separation efficiency, and flux rate towards three different oils-petroleum ether, n-hexane, and silicone oil. Petroleum ether has the highest separation efficiency (99.5%), and flux rate (13,500 L m-2 h-1), while silicone oil has the lowest. However, silicone oil has the highest absorption capacity (218.9 g/g) and petroleum ether has the lowest (194.8 g/g). For the absorption capacity and separation efficiency, a one-way ANOVA test was conducted. The statistical analyses revealed significant differences in absorption capacity and separation efficiency for the three oils, highlighting the efficacy of the superhydrophobic membrane for tailored oil/water separation. Additionally, the S.P membrane exhibited good mechanical (the membrane maintains its superhydrophobicity until an abrasion length of 850 cm) and chemical stability (the membrane maintains its superhydrophobicity in pH range 1-13), withstanding abrasion and immersion in solutions of varying pH values. The CQD-based S.P membrane shows great potential as a promising material for oil/water separation applications, with excellent performance and stability under various environmental conditions.
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Affiliation(s)
- Rasmiah Saad Almufarij
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Mohamed Elshahat Mohamed
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria 21568, Egypt
- Faculty of Advanced Basic Sciences, Alamein International University, Alamein City 51718, Egypt
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9
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Effect of Hydrothermal Conditions on Kenaf-Based Carbon Quantum Dots Properties and Photocatalytic Degradation. SEPARATIONS 2023. [DOI: 10.3390/separations10020137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
The development of biomass-based CQD is highly attentive to enhancing photocatalytic performance, especially in secondary or ternary heterogeneous photocatalysts by allowing for smooth electron-hole separation and migration. In this study, kenaf-based carbon quantum dots (CQD) were prepared. The main objective of the current work was to investigate temperature, precursor mass and time in hydrothermal synthesis treatment to improve the CQD properties and methylene blue photocatalytic degradation. Optimization of kenaf-based CQD for inclusion in hydrothermal treatment was analyzed. The as-prepared CQDs have been characterized in detail by Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscope (HRTEM), photoluminescence (PL) and ultraviolet–visible (UV–Vis) spectroscopy. It was found that C200-0.5-24 exhibits a higher photocatalytic activity of the methylene blue dye and optimized hydrothermal conditions of 200 °C, 0.5 g and 24 h. Therefore, novel kenaf-based CQD was synthesized for the first time and was successfully optimized in the as-mentioned conditions. During the hydrothermal treatment, precursor mass controls the size and the distribution of CQD nanoparticles formed. The C200-0.5-24 showed a clearly defined and well-distributed CQD with an optimized nanoparticle size of 8.1 ± 2.2 nm. Indeed, the C200-0.5-24 shows the removal rate of 90% of MB being removed within 120 min.
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10
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Gaur VK, Gautam K, Sharma P, Gupta S, Pandey A, You S, Varjani S. Carbon-based catalyst for environmental bioremediation and sustainability: Updates and perspectives on techno-economics and life cycle assessment. ENVIRONMENTAL RESEARCH 2022; 209:112793. [PMID: 35090873 DOI: 10.1016/j.envres.2022.112793] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/15/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
Global rise in the generation of waste has caused an enormous environmental concern and waste management problem. The untreated carbon rich waste serves as a breeding ground for pathogens and thus strategies for production of carbon rich biochar from waste by employing different thermochemical routes namely hydrothermal carbonization, hydrothermal liquefaction and pyrolysis has been of interest by researchers globally. Biochar has been globally produced due to its diverse applications from environmental bioremediation to energy storage. Also, several factors affect the production of biochar including feedstock/biomass type, moisture content, heating rate, and temperature. Recently the application of biochar has increased tremendously owing to the cost effectiveness and eco-friendly nature. Thus this communication summarized and highlights the preferred feedstock for optimized biochar yield along with the factor influencing the production. This review provides a close view on biochar activation approaches and synthesis techniques. The application of biochar in environmental remediation, composting, as a catalyst, and in energy storage has been reviewed. These informative findings were supported with an overview of lifecycle and techno-economical assessments in the production of these carbon based catalysts. Integrated closed loop approaches towards biochar generation with lesser/zero landfill waste for safeguarding the environment has also been discussed. Lastly the research gaps were identified and the future perspectives have been elucidated.
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Affiliation(s)
- Vivek Kumar Gaur
- School of Energy and Chemical Engineering, UNIST, Ulsan, 44919, Republic of Korea; Centre for Energy and Environmental Sustainability, Lucknow, 226 001, Uttar Pradesh, India
| | - Krishna Gautam
- Centre for Energy and Environmental Sustainability, Lucknow, 226 001, Uttar Pradesh, India
| | - Poonam Sharma
- Department of Bioengineering, Integral University, Lucknow, India
| | | | - Ashok Pandey
- Centre for Energy and Environmental Sustainability, Lucknow, 226 001, Uttar Pradesh, India; Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India; India Sustainability Cluster, School of Engineering, University of Petroleum and Energy Studies, Dehradun, 248 007, Uttarakhand, India
| | - Siming You
- James Watt School of Engineering, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat, 382 010, India.
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11
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Wang H, Ren HL, Hu P, Li YS, Zheng Y, Cao Q, Liu ZX, Liu ZS, Yang Y, Lu SY. A Fluorescence Immunochromatographic Strip Based on Quantum Dot Nanobeads for the Rapid Detection of Okadaic Acid. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-022-02302-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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M. J, S. S, M. M, D. P. Improved citric acid-derived carbon dots synthesis through microwave-based heating in a hydrothermal pressure vessel. RSC Adv 2022; 12:32401-32414. [DOI: 10.1039/d2ra06420k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/03/2022] [Indexed: 11/13/2022] Open
Abstract
Carbon dots (CDs) synthesis from citric acid, ethylenediamine, and formamide by microwave-assisted hydrothermal carbonization in a pressurized vessel.
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Affiliation(s)
- Jorns M.
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Strickland S.
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Mullins M.
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Pappas D.
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
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