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Guo J, Fan Y, Qiao C, Ma X, Dong X, Zeng H. Harnessing coal and coal waste for environmental conservation: A review of photocatalytic materials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174437. [PMID: 38960199 DOI: 10.1016/j.scitotenv.2024.174437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/29/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
Fossil fuels, especially coal, have played a pivotal role in driving technological and economic advancements over the past century, though accompanied by numerous environmental challenges. Rapid progress in green and sustainable energy sources, including tidal, wind, and solar energy, coupled with growing environmental concerns, the conventional coal industry is experiencing a sustained decline in both size and financial viability. This situation necessitates the urgent adoption of advanced approaches to coal utilization. Beyond serving as an energy source, coal and its by-products, known as coal waste, can serve as valuable resources for the development of advanced materials, including photocatalysts. The advancement of photocatalytic materials derived from coal and coal waste can capitalize on these natural carbon and mineral sources, providing a viable solution to numerous environmental challenges. Currently, research in this domain remains in its early stages, with existing studies primarily focusing on specific types of photocatalysts or particular aspects of the fabrication process. Therefore, available coal-based and coal waste-based photocatalytic materials were systematically examined and categorized into six types according to their composition and dimensional/structural characteristics. Each type of photocatalytic material was introduced, along with common fabrication and characterization technologies. Representative works were discussed in detail to highlight the unique features of different types of coal-based and coal waste-based photocatalytic materials. Furthermore, the promising applications of these materials in environmental protection and pollution treatment were summarized, while also addressing the challenges and prospects in this research field. This review comprehensively overviews the fundamental knowledge and recent advancements in photocatalytic materials derived from coal and coal waste, with the goal of catalyzing the development of next generation photocatalysts and contributing to the transformation of the conventional coal industry.
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Affiliation(s)
- Jiaqi Guo
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Yuping Fan
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Chenyu Qiao
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Xiaomin Ma
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Xianshu Dong
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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Kuanyshbekov T, Akatan K, Guseinov N, Nemkaeva R, Kurbanova B, Tolepov Z, Tulegenova M, Kabdrakhmanova S, Zhilkashinova A. Renewable Resources as Promising Materials for Obtaining Graphene Oxide-like Structures. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1588. [PMID: 39404315 PMCID: PMC11478307 DOI: 10.3390/nano14191588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Revised: 09/16/2024] [Accepted: 09/20/2024] [Indexed: 10/19/2024]
Abstract
Currently, one of the topical directions in the field of production and application of graphene-like nanostructures is the use of renewable natural raw materials, which have unlimited resources for an economically efficient large-scale yield of a product with environmental safety. In this regard, we present the production of graphene oxide (GO) from a renewable natural raw material of plant biomass, birch activated carbon (BAC), and a comparison of the obtained physicochemical, mechanical, and electrical properties of birch activated carbon-graphene oxide (BAC-GO) and graphite-graphene oxide (G-GO) synthesized from the initial materials, BAC and graphite (G). Results obtained from this study confirm the successful oxidation of BAC, which correlates well with the physical-chemical dates of the G-GO and BAC-GO samples. Change in data after the oxidation of graphite and BAC was facilitated by the structure of the starting materials and, presumably, the location and content of functional oxygen-containing groups in the G-GO and BAC-GO chains. Based on the results, the application of a cost-effective, eco-friendly colloidal solution of nanodispersed BAC-GO from a plant biomass-based high-quality resource for producing large-scale nanostructured graphene is validated which has potential applicability in nanoelectronics, medicine, and other fields.
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Affiliation(s)
- Tilek Kuanyshbekov
- National Scientific Laboratory of Collective Use, Sarsen Amanzholov East Kazakhstan University, 55 Kazakhstan Str., Ust-Kamenogorsk 070002, Kazakhstan; (K.A.); (A.Z.)
- Kaz Graphene, 63 Zapadnyi Str., Ust-Kamenogorsk 070011, Kazakhstan; (N.G.); (Z.T.); (M.T.)
| | - Kydyrmolla Akatan
- National Scientific Laboratory of Collective Use, Sarsen Amanzholov East Kazakhstan University, 55 Kazakhstan Str., Ust-Kamenogorsk 070002, Kazakhstan; (K.A.); (A.Z.)
| | - Nazim Guseinov
- Kaz Graphene, 63 Zapadnyi Str., Ust-Kamenogorsk 070011, Kazakhstan; (N.G.); (Z.T.); (M.T.)
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan;
| | - Renata Nemkaeva
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan;
| | - Bayan Kurbanova
- Department of Physics and Technology, Al-Farabi Kazakh National University, Al-Farabi Avenue, 71, Almaty 050040, Kazakhstan;
| | - Zhandos Tolepov
- Kaz Graphene, 63 Zapadnyi Str., Ust-Kamenogorsk 070011, Kazakhstan; (N.G.); (Z.T.); (M.T.)
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan;
| | - Malika Tulegenova
- Kaz Graphene, 63 Zapadnyi Str., Ust-Kamenogorsk 070011, Kazakhstan; (N.G.); (Z.T.); (M.T.)
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan;
| | - Sana Kabdrakhmanova
- Scientific Center of Composite Materials, 79 Nurmakovstr., Almaty 050026, Kazakhstan;
| | - Almira Zhilkashinova
- National Scientific Laboratory of Collective Use, Sarsen Amanzholov East Kazakhstan University, 55 Kazakhstan Str., Ust-Kamenogorsk 070002, Kazakhstan; (K.A.); (A.Z.)
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Majumder R, Karmakar S, Mishra S, Mallick AB, Das Mukhopadhyay C. Functionalized Carbon Nano-Onions as a Smart Drug Delivery System for the Poorly Soluble Drug Carmustine for the Management of Glioblastoma. ACS APPLIED BIO MATERIALS 2024; 7:154-167. [PMID: 38088856 DOI: 10.1021/acsabm.3c00688] [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: 01/16/2024]
Abstract
The drug delivery system for transporting anticancer agents to targeted tissues in the body is a challenging issue. In search of a suitable biocompatible carrier having controlled and sustained drug release properties of poorly soluble drugs, carbon nano-onions (CNOs) were loaded with an anticancer drug, bis-chloroethyl nitrosourea (BCNU/carmustine). CNOs being autofluorescent, drug-loaded functionalized CNOs (f-CNO-BCNU) can be detected in vivo. Transmission electron microscopy (TEM) and differential light scattering (DLS) techniques were used to analyze the sizes of these f-CNOs. The molecular study revealed that the f-CNO-BCNU readily and noncovalently binds with the folate receptors present on the cancer cell surface in excess. Computer modeling and molecular dynamics simulation followed by binding free energy calculation shows f-CNOs have -29.9 kcal/mol binding free energy, and it noncovalently binds the receptor FRα using loop dynamics of three essential loops present in the protein along with polar stabilization interactions provided by Asp55 and Glu86 residues present in the active site. The f-CNO effectively decreased cancer cell viability with a low IC50 value (the concentration that led to 50% killing of the cells). The cell-based Franz diffusion assay was performed to study the drug release profile. The f-CNO-BCNUs also decreased the mitochondrial membrane potential of U87 cells, increased reactive oxygen species release, and caused a loss of mitochondrial membrane integrity. The f-CNOs also increased the percentage of apoptotic cells observed by the Annexin V assay. Based on observed results, it can be concluded that the f-CNO-BCNU efficiently targets the cancer cells, enhances the bioavailability of carmustine, and can be used as a smart chemotherapeutic agent. This strategy offers better patient compliance and greater bioavailability of the drug.
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Affiliation(s)
- Rabindranath Majumder
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Soumyajit Karmakar
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Amitava Basu Mallick
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
| | - Chitrangada Das Mukhopadhyay
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711103, India
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Kaur D, Singh K, Reynolds WT, Pal B. Graphene oxide-coated Ag-TiO 2 hybrid nanocomposites for superior photocatalytic activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:97660-97672. [PMID: 37596483 DOI: 10.1007/s11356-023-29301-2] [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: 05/23/2023] [Accepted: 08/08/2023] [Indexed: 08/20/2023]
Abstract
Graphene oxide (GO) has now emerged as one of the most promising materials in different areas such as photocatalysis, adsorption, and energy storage due to its high surface area, unique layered structure, etc. Among various types of precursors, anthracite coal has attracted a lot of attention nowadays as it affords GO a high concentration of sp2 carbons resulting in high conductivity and superior absorbance in the visible region. In this report, we have prepared GO-TiO2 nanocomposites as it is supposed to possess high photocatalytic activity owing to facile electron transmission from the conduction band of TiO2 to the GO surface resulting in a much lower degree of electron-hole pair recombination. To boost the photocatalytic activity further, TiO2 was coated with Ag nanoparticles as well. These hybrid structures were characterized by different analytical techniques, for example, XRD, HR-TEM, SEM, and Raman spectroscopy. The XRD pattern of these composites consists of characteristic peaks corresponding to GO, TiO2, and Ag. The HR-TEM studies confirm the presence of GO layers, cube-shaped TiO2, and spherical Ag nanoparticles. Phenol and 4-nitrophenol have been used as model pollutants to evaluate the photooxidation efficiencies under both UV and visible light irradiation. Under UV irradiation, the GO/Ag-TiO2 ternary nanocomposite shows better photooxidation efficiency (62%) compared to Ag-TiO2 (38%), GO-TiO2 (9%), GO (17%), and TiO2 (8%) toward phenol degradation. The GO/Ag-TiO2 is also having the highest photocatalytic activity toward the removal of phenol under visible light irradiation (34%). The ternary heterostructure (85%) also possesses superior photooxidation activity compared to Ag-TiO2 (44%) and GO-TiO2 (71%) toward the degradation of p-nitrophenol under UV light radiation for 60 min. The above observation reveals that the cooperative effect of Ag, TiO2, and GO is playing a crucial role to result in the high photooxidation activity of the GO/Ag-TiO2 hetero-nanocomposites.
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Affiliation(s)
- Davinder Kaur
- School of Chemistry and Biochemistry, TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - Karanveer Singh
- School of Chemistry and Biochemistry, TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India
| | - William T Reynolds
- Materials Science and Engineering Department, Virginia Tech, Blacksburg, VA, 24061-0237, USA
| | - Bonamali Pal
- School of Chemistry and Biochemistry, TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India.
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Balqis N, Mohamed Jan B, Simon Cornelis Metselaar H, Sidek A, Kenanakis G, Ikram R. An Overview of Recycling Wastes into Graphene Derivatives Using Microwave Synthesis; Trends and Prospects. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103726. [PMID: 37241354 DOI: 10.3390/ma16103726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/21/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023]
Abstract
It is no secret that graphene, a two-dimensional single-layered carbon atom crystal lattice, has drawn tremendous attention due to its distinct electronic, surface, mechanical, and optoelectronic properties. Graphene also has opened up new possibilities for future systems and devices due to its distinct structure and characteristics which has increased its demand in a variety of applications. However, scaling up graphene production is still a difficult, daunting, and challenging task. Although there is a vast body of literature reported on the synthesis of graphene through conventional and eco-friendly methods, viable processes for mass graphene production are still lacking. This review focuses on the variety of unwanted waste materials, such as biowastes, coal, and industrial wastes, for producing graphene and its potential derivatives. Among the synthetic routes, the main emphasis relies on microwave-assisted production of graphene derivatives. In addition, a detailed analysis of the characterization of graphene-based materials is presented. This paper also highlights the current advances and applications through the recycling of waste-derived graphene materials using microwave-assisted technology. In the end, it would alleviate the current challenges and forecast the specific direction of waste-derived graphene future prospects and developments.
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Affiliation(s)
- Nuralmeera Balqis
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Badrul Mohamed Jan
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | | | - Akhmal Sidek
- Petroleum Engineering Department, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
| | - George Kenanakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, Vasilika Vouton, GR-700 13 Heraklion, Crete, Greece
| | - Rabia Ikram
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
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Herreros-Lucas C, Vila-Fungueiriño JM, Giménez-López MDC. Electrochemically Versatile Graphite Nanoplatelets Prepared by a Straightforward, Highly Efficient, and Scalable Route. ACS APPLIED MATERIALS & INTERFACES 2023; 15:21375-21383. [PMID: 37015345 PMCID: PMC10165606 DOI: 10.1021/acsami.2c22495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Nanostructured carbon materials with tailor-made structures (e.g., morphology, topological defect, dopant, and surface area) are of significant interest for a variety of applications. However, the preparation method selected for obtaining these tailor-made structures determines the area of application, precluding their use in other technological areas of interest. Currently, there is a lack of simple and low-cost methodologies versatile enough for obtaining freestanding carbon nanostructures that can be used in either energy storage or chemical detection. Here, a novel methodology for the development of a versatile electrochemically active platform based on freestanding graphite nanoplatelets (GNP) has been developed by exploiting the interiors of hollow carbon nanofibers (CNF) comprising nanographene stacks using dry ball-milling. Even though ball-milling could be considered as a universal method for any carbonaceous material, often, it is not as simple (one step, no purification, and no solvents), efficient (just GNP without tubular structures), and quick (just 20 min) as the sustainable method developed in this work, free of surfactants and stabilizer agents. We demonstrate that the freestanding GNP developed in this work (with an average thickness of 3.2 nm), due to the selective edge functionalization with the minimal disruption of the basal plane, can act either as a supercapacitor or as a chemical sensor, showing both a dramatic improvement in the charge storage ability of more than 30 times and an enhanced detection of electrochemically active molecules such as ascorbic acid with a 236 mV potential shift with respect to CNF in both cases. As shown here, GNP stand as an excellent versatile alternative compared to the standard commercially available carbon-based materials. Overall, our approach paves the way for the discovery of new nanocarbon-based electrochemical active platforms with a wide electrochemical applicability.
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Affiliation(s)
- Carlos Herreros-Lucas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - José Manuel Vila-Fungueiriño
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - María Del Carmen Giménez-López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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Novel insights into Graphene oxide-based adsorbents for remediation of hazardous pollutants from aqueous solutions: A comprehensive review. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wang YM, Zhang CH. Reduced Graphene Oxide Derived from Low-Grade Coal for High-Performance Flexible Supercapacitors with Ultrahigh Cyclability. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2989. [PMID: 36080026 PMCID: PMC9457952 DOI: 10.3390/nano12172989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/24/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
Preparation of reduced graphene oxide (RGO) from abundant and inexpensive low-grade coal is regarded as one of the most promising methods for utilizing this resource in a high-value and environmentally sustainable manner. As the main precursor for the fabrication of RGO, graphene oxide (GO) can be extracted from low-grade coal such as lignite, but its size is just in the range of tens to hundreds of nanometers, which limits its practical application. Herein, we demonstrate that large-size RGO sheets can be prepared in large quantities by the pretreatment of lignite using the high temperature-high pressure (HTHP) method. The RGO electrode after the reduction reaction by 50 mM NaBH4 at 105 °C features porosity and high conductivity, which can facilitate high electrochemical reaction efficiency. Thus, we also demonstrate the use of lignite-derived RGO for supercapacitor electrode materials with high performance. The lignite-derived RGO supercapacitor can deliver outstanding volumetric capacitance (30.6 F cm-3), high energy density (4.2 mW h cm-3), excellent flexibility (79.5% retention of the initial capacitance at 180° bending), and a long lifespan (112.3% retention of the initial capacitance after 20,000 cycles). It is believed that the proposed large-size RGO based on reasonable optimization of inferior lignite will offer a new prospect for next-generation energy storage applications.
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Samanta A, Ghosh S, Sarkar S. Sustained generation of peroxide from the air by carbon nano onion under visible light to combat RNA virus. J CHEM SCI 2022; 134:9. [PMID: 35035160 PMCID: PMC8752328 DOI: 10.1007/s12039-021-02013-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/12/2022]
Abstract
Carbon nano onion (CNO) from dried grass has been synthesized by carbonization in the size range, 20 to 100 nm. This shows catalytic property to transform aerial oxygen under visible light to generate reactive oxygen species (ROS). A concept has been presented herein to show that this CNO even under room light generates hydrogen peroxide which inhibits WSN influenza virus (H1N1). The advantage of introducing CNO, synthesized from a cheap source to cater to the global need, is to sterilize infected hospitals indoor and outdoor, aircraft carriers, air conditioner vents due to its sustained conversion of air to ROS. Thus, CNO use could prevent frequent evacuation as used by conventional sanitisers to sterilize infected places from other RNA virus and hospital pathogens under COVID-19 pandemic. Carbon nano onion (CNO) under aerial oxygen on exposure with visible light generates ROS which is capable to rupture the lipid envelope of SARS-CoV-2 followed by disintegrating its RNA.
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Affiliation(s)
- Ankit Samanta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah, West Bengal 711103 India
| | - Subrata Ghosh
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah, West Bengal 711103 India
| | - Sabyasachi Sarkar
- Department of Applied Chemistry, Ramakrishna Mission Vidyamandira, Belur Math, Howrah, West Bengal 711202 India
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Begum A, Sheikh AH, Moula G, Sarkar S. Fe 4S 4 Cubane Type Cluster Immobilized on a Graphene Support: A High Performance H 2 Evolution Catalysis in Acidic Water. Sci Rep 2017; 7:16948. [PMID: 29208921 PMCID: PMC5717245 DOI: 10.1038/s41598-017-17121-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 11/22/2017] [Indexed: 11/10/2022] Open
Abstract
The development of alternate catalysts that utilize non-precious metal based electrode materials such as the first row transition metal complexes is an important goal for economic fuel cell design. In this direction, a new Fe4S4 cubane type cluster, [PPh4]2[Fe4S4(DMET)4] (1) (DMET = cis-1,2-dicarbomethoxyethylene dithiolate) and its composite with functionalized graphene, (1@graphene) have been synthesized and characterized. The presence of nanocrystalline structures on graphene matrix in TEM and SEM images of 1@graphene indicate that the cluster (1) has been immobilized. The composite, 1@graphene evolves H2 gas from p-toluene sulfonic acid (TsOH) in a mixture of H2O and CH3CN under ambient conditions with a significant turnover number of 3200. 1@graphene electro-catalyzes H2 evolution at Ep, −1.2 V with remarkable throughput, catalytic efficiency and stability in only H2O or in only CH3CN. The Fe4S4 cluster (1) alone electro-catalyzes hydrogen evolution at Ep, −0.75 V from TsOH in CH3CN. The X-ray crystal structure of the Fe4S4 cluster (1) (λmax, CH2Cl2, 823 nm; ε, 2200 mol−1 cm−1) shows that it is dianionic with a cumulative oxidation state of +2.5 for the iron centers and short C-S bond distances (ca., 1.712 Å & 1.727 Å) indicating the presence of sulfur based radicals.
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Affiliation(s)
- Ameerunisha Begum
- Department of Chemistry, Faculty of Science, Jamia Hamdard University, New Delhi, 110062, India.
| | - Aasif Hassan Sheikh
- Department of Chemistry, Faculty of Science, Jamia Hamdard University, New Delhi, 110062, India
| | - Golam Moula
- Nanoscience and Synthetic Leaf Laboratory at Downing Hall, Center for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Botanic Garden, Howrah, 711103, West Bengal, India
| | - Sabyasachi Sarkar
- Nanoscience and Synthetic Leaf Laboratory at Downing Hall, Center for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology, Botanic Garden, Howrah, 711103, West Bengal, India
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Maity S, Pakhira B, Ghosh S, Saha R, Sarkar R, Barui A, Sarkar S. Microcarbon-based facial creams activate aerial oxygen under light to reactive oxygen species damaging cell. APPLIED NANOSCIENCE 2017. [DOI: 10.1007/s13204-017-0604-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pakhira B, Samanta A, Das GS, Sarkar S. Graphene oxide : A No-Acid Low-Temperature Synthesis from Graphite. ChemistrySelect 2017. [DOI: 10.1002/slct.201700751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bholanath Pakhira
- Dept. of Chemistry; Sister Nibdedita Govt.General Degree College for Girls, Hastings House; 20 B Judges Court Road, Alipore Kolkata 700027 India
- Dept. of Chemistry; Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden; Howrah 711103 India
| | - Ankit Samanta
- Nano Science and Synthetic Leaf Laboratory at Downing Hall; Center for Healthcare Science and Technology; Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden; Howrah 711103 India
| | - Gouri S Das
- Nano Science and Synthetic Leaf Laboratory at Downing Hall; Center for Healthcare Science and Technology; Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden; Howrah 711103 India
| | - Sabyasachi Sarkar
- Nano Science and Synthetic Leaf Laboratory at Downing Hall; Center for Healthcare Science and Technology; Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden; Howrah 711103 India
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Abstract
Water soluble fluorescent carbon nano onions (wsCNO) cross the blood brain barrier (BBB) in the CADASIL murine model as well as in GBM induced mice.
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Affiliation(s)
- Bholanath Pakhira
- Nano Science and Synthetic Leaf Laboratory
- Centre for Healthcare Science and Technology
- Indian Institute of Engineering Science and Technology
- Howrah
- India
| | - Mitrajit Ghosh
- Institute for Stroke and Dementia Research (ISD) and Munich Cluster for System
- Neurology (Synergy)
- University of Munich
- Medical Centre
- Munich-81377
| | - Afreen Allam
- Cromoz. Inc. 2 Davis Drive
- Research Triangle Park
- USA
| | - Sabyasachi Sarkar
- Nano Science and Synthetic Leaf Laboratory
- Centre for Healthcare Science and Technology
- Indian Institute of Engineering Science and Technology
- Howrah
- India
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