Article
Nanoscience & Nanotechnology
Emad Al-Dhubhani, Michele Tedesco, Wiebe M. de Vos, Michel Saakes
Summary: Electrospinning combined with electrospraying can produce efficient bipolar membranes (BPMs) with enhanced water dissociation performance by introducing MCM-41 as a catalyst, which is of great significance for fuel cell and flow battery applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Monika Wysocka-Zolopa, Izabela Zablocka, Emilia Gradzka, Jakub Goclon, Krzysztof Winkler
Summary: A nanocomposite of polypyrrole@MCM-41 was prepared by polymerizing pyrrole inside silica nanopores, resulting in stable electrochemical activity at positive potentials. Characterization was done using various techniques, and the composite's electrochemical properties were compared with DFT calculations.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Ang Li, Xiao Chen, Tingting Guo, Guangtong Hai, Panpan Liu, Han Yu, Jianhang Xu
Summary: This study utilized molecular dynamics to investigate the molecular motion mechanisms of PCMs with different functional groups confined in mesoporous MCM-41, aiming to reveal the interaction mechanisms between the two at the molecular and atomic levels to provide theoretical guidance for the design and preparation of high-performance composite PCMs based on MCM-41.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Ozge Gorduk, Metin Gencten, Semih Gorduk, Mutlu Sahin, Yucel Sahin
Summary: In this study, three different metallo phthalocyanine/functionalized-multiwalled carbon nanotube/polyaniline/pencil graphite electrode (MPc/f-MWCNT/PANI/PGE) modified electrodes were prepared for supercapacitors, exhibiting high specific capacitance, energy and power densities, and long cycle life. The NiPc/f-MWCNT/PANI/PGE electrode showed the highest specific capacitance among all electrodes and maintained approximately 100% of its capacitance after 1000 charge-discharge cycles. The synergistic effects between the components significantly improved the overall supercapacitor performance of the electrodes, addressing the disadvantages of individual components.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Applied
J. C. Bedoya, R. Valdez, L. Cota, M. A. Alvarez-Amparan, A. Olivas
Summary: In this study, mesoporous Al-MCM-41 nanospheres with variable sizes were successfully synthesized and characterized, showing hexagonal and mesoporous structure with the successful incorporation of Al ions. The smaller nanospheres exhibited more medium acidic sites on the surface. All samples displayed good selectivity towards DME, with the smallest nanospheres achieving 78% DME yield at 300 degrees C. The stability test revealed high DME yield (>60%) maintained during a 48-hour time-on-stream, indicating the potential for material recycling.
Article
Chemistry, Physical
S. Mahendran, V. V. Srinivasan, G. Karthikeyan, M. P. Pachamuthu
Summary: Mesoporous supports with metal incorporation have shown high catalytic activity in organic synthesis and biomass conversion. The niobium incorporated mesoporous materials (Nb-MCM-41) fabricated in this study exhibited efficient conversion of HMF with high selectivity to DFF. Characterization of the solid Nb-MCM-41 catalysts using X-Ray diffraction, thermogravimetric analysis, and other techniques revealed their crystal structure, stability, porosity, and acidity.
MOLECULAR CATALYSIS
(2021)
Article
Materials Science, Paper & Wood
Abderrazak Hamam, Mounira Maiza, Mohamed M. Chehimi, Dehbia Oukil
Summary: In this study, a cellulosic paper substrate coated with polypyrrole through in situ polymerization was developed, followed by the coating of silver nanoparticles. Characterization and electrochemical tests confirmed the unique high performance electrocatalytic properties of this low-cost, flexible cellulosic paper electrode material in aqueous solutions.
Article
Chemistry, Multidisciplinary
C. G. Ann Maria, Ananya S. Agnihotri, Anitha Varghese, M. Nidhin
Summary: A sensitive and selective sensor for the detection of arsenic (iii) in polluted water samples has been developed using chitosan-stabilized silver nanoparticles (AgNPs). The synthesized silver nanoparticles have a size of 6 nm and a polydispersity index (PDI) of 0.3, enhancing the electroactive surface area and sensor sensitivity. The sensor shows high selectivity even in the presence of other possible interferents. The detection of As(iii) was performed using differential pulse anodic stripping voltammetry (DPASV), with a detection limit of 11.39 pM.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Biochemistry & Molecular Biology
Zaria Malindi, Stefan Barth, Heidi Abrahamse
Summary: Melanoma is a highly aggressive cancer with poor treatment response. Photodynamic therapy and nanoparticle-based drug delivery show potential for melanoma treatment. Antibody-drug conjugates and recombinant antibody fragments offer advantages over traditional monoclonal antibodies. SNAP-tag enables precise drug delivery through antibody fragment labeling.
Article
Energy & Fuels
Aroa R. Mainar, Elena Iruin, J. Alberto Blazquez
Summary: Electrically rechargeable zinc-air batteries have low cost, high security and energy density, but low power density, which requires improvement for commercial potential. The development of a new technology, ZASH battery, integrates the advantages of zinc-air and silver-zinc technologies, showing potential for practical applications in the market. Further research on material development beyond conventional approaches could lead to progress in technology for future market applications.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Ceramics
Wafaa S. Abo El-Yazeed, Sohier A. El-Hakam, Reda S. Salama, Amr A. Ibrahim, Awad Ahmed
Summary: In this study, silver exchanged phosphomolybdic acid catalysts were synthesized and characterized. The results showed that the catalysts had good crystallinity, strong Lewis acidity, and weak Bronsted acidity. The prepared catalysts exhibited good catalytic activity in the synthesis 7-hydroxy-4-methyl coumarin and hydroquinone diacetate.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Mohammed Hachemaoui, Carmen B. Molina, Carolina Belver, Jorge Bedia, Adel Mokhtar, Rachida Hamacha, Bouhadjar Boukoussa
Summary: In this study, catalysts based on MCM-41 modified with different metals were prepared by a hydrothermal route and calcined, confirming the formation of metal oxides on their surfaces. The results showed that Cr/MCM-41 and Fe/MCM-41 catalysts exhibited high activity and stability in the catalytic wet peroxide oxidation of acetaminophen, with Fe/MCM-41 showing the best stability among them.
Article
Chemistry, Multidisciplinary
Yongqi Deng, Changchang Teng, Yihan Wu, Kefu Zhang, Lifeng Yan
Summary: The rapidly growing demand for batteries has led to a lack of global mineral resources, making rechargeable organic batteries an attractive alternative. In this study, a composite electrode using a modified polypeptide was synthesized and showed excellent performance in aqueous electrolytes.
Article
Chemistry, Multidisciplinary
Enbo Shangguan, Liming Wang, Yingchao Wang, Linpo Li, Mingxing Chen, Jing Qi, Chengke Wu, Mingyu Wang, Quanmin Li, Shuyan Gao, Jing Li
Summary: This study proposes a simple and effective method to convert discarded acidic zinc-carbon dry batteries into reusable MnO/ZnO/C composites. The resulting electrode exhibits high reversible capacity and rate capability, as well as excellent cycling stability. This strategy offers an economical and facile route to transform zinc-carbon battery waste into useful materials for rechargeable zinc ion batteries.
Article
Chemistry, Multidisciplinary
Hamid Reza Hosseini, Majid Abdouss, Mostafa Golshekan
Summary: This study presents a comprehensive investigation of a novel nanocomposite with superparamagnetic properties and a pH-responsive nanocarrier for efficient drug delivery. The results demonstrate successful fabrication of the nanocomposite and its effectiveness in sustained-release drug delivery, as well as its biocompatibility and ability to enhance therapeutic effects in osteogenesis.
Article
Chemistry, Applied
Manoj Kumar Bharty, Aarti Singh, Pooja Bharati, Shivendra Kumar Pandey, Devesh Kumar Singh, Vellaichamy Ganesan, Praveen Kumar Verma, Arvind Acharya, Akhilesh Bharti, Ray J. Butcher
Summary: This study focuses on the electrocatalytic water oxidation by cobalt(III) complexes and their cytotoxicity against Dalton's lymphoma cells. Complex 2 showed significant cytotoxicity against DL cells with an IC50 value of 5 μM, indicating its potential as an anticancer agent.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Environmental Sciences
Pradeep Kumar, Piyush Kumar Sonkar, Kavindra Nath Tiwari, Amit Kumar Singh, Sunil Kumar Mishra, Jyoti Dixit, Vellaichamy Ganesan, Jasmeet Singh
Summary: In this study, a simple and eco-friendly biosynthesis of silver nanoparticles was achieved using aqueous leaves extract. The synthesized nanoparticles were characterized using various techniques and were found to be selective and sensitive for the detection of Hg2+. The nanoparticles were immobilized on a glassy carbon electrode for electrochemical determination of Hg2+, exhibiting a linear calibration range and a low limit of detection.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Tushar Kant, Kamlesh Shrivas, Indrapal Karbhal, Monisha, Sanjay Yadav, Tikeshwari, Sushama Sahu, Yugal Kishor Mahipal, Vellaichamy Ganesan
Summary: Recently, hydrogen peroxide (H2O2) has been used as a disinfectant in sanitizers for cleaning hands, and solid surfaces of hospitals, offices and homes to prevent the spread of the COVID-19 virus. Effluents from various sources should be monitored for their H2O2 content to avoid environmental pollution. The developed graphene-printed paper electrode showed a wide linear range and a better limit of detection for the determination of H2O2, making it a rapid, economical, flexible, and eco-friendly method for analyzing H2O2 in wastewater.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Physics, Applied
Hasan Afzal, Manju Mishra Patidar, M. P. Saravanan, R. Venkatesh, V. Ganesan
Summary: The interaction between superconductivity and spin-polarized surface states of topological materials provides a platform for research in proximity induced coupling effects and spintronics. This study observed the complex interplay between spin-polarized surface states of MoTe2 nanolayer sheets and superconducting states, and a competition between superconductivity and topological order was found.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Polymer Science
Koushik Nandy, Arti Srivastava, Shere Afgan, Rajesh Kumar, Dharmendra Kumar Yadav, Vellaichamy Ganesan
Summary: In this study, poly(MMA) and poly(AMPS) were prepared using methyl methacrylate (MMA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS), respectively. A silver nanocomposite, Ag-(PMMA-b-PAMPS), was synthesized using the prepared polymers. The Ag-(PMMA-b-PAMPS) was then used to construct an electrochemical sensing platform for the sensitive determination of trace amounts of toxic Hg2+.
Article
Chemistry, Analytical
Ananya Tiwari, Mamta Yadav, Devesh Kumar Singh, Vellaichamy Ganesan
Summary: This study presents an electrochemical sensing framework for the determination of nicotine using a glassy carbon electrode immobilized with Fe(bpy)(3)(2+) supported by Nafion and multi-walled carbon nanotubes. The modified electrode exhibited stable redox peaks and effective electrochemical oxidation of nicotine, with superior performance in terms of selectivity, stability, and reproducibility. Real samples such as beedi and tobacco were also successfully analyzed with satisfactory recovery percentages.
Article
Chemistry, Multidisciplinary
Krishna Kumar, Devesh Kumar Singh, Mrinal Kanti Adak, Vellaichamy Ganesan, Angshuman Roy Choudhury, Subrato Bhattacharya
Summary: A series of Ni(II) complexes were synthesized and integrated with multi-walled carbon nanotubes (MWCNTs). The composite 2@MWCNTs showed the highest onset potential and the highest rate of oxygen reduction, while composites 3a@MWCNTs and 3b@MWCNTs exhibited high selectivity towards two-electron oxygen reduction. Composites 1a@MWCNTs, 1b@MWCNTs, and 1c@MWCNTs showed moderate selectivity and activity for the two-electron oxygen reduction. Composite 3a@MWCNTs demonstrated the optimal combination of activity and selectivity for H2O2 production. All the composites exhibited high durability and could be suitable for long-term oxygen reduction synthesis of H2O2.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Ram Nayan Gautam, Ananya Tiwari, Seema Gupta, M. K. Bharty, Vellaichamy Ganesan, Sundeep Kumar, P. Bharati, R. J. Butcher
Summary: Two complexes [Mn(Hmpth)2(bpy)] (1) and [Mn(Hmpth)2(o-phen)](2) with 1-(4-methoxybenzoyl)-4-phenyl-3-thiosemicarbazide (H2mpth) as ligand and 2-2'-bipyridine (bpy) or o-phenanthroline (o-phen) as co-ligand were synthesized and characterized. The optoelectronic properties of Mn(II) complexes were investigated for the first time, showing that complex 1 has higher fluorescence intensity than H2mpth and complex 2. The thermal behavior and electrochemical characteristics of the complexes were also studied. Cyclic voltammetry analysis revealed a reversible one electron transfer process for the Mn2+/3+ redox processes.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Tasleem, Mamta Yadav, Vellaichamy Ganesan, Muniappan Sankar
Summary: Researchers are exploring alternatives to expensive and unstable Pt-based oxygen reduction reaction (ORR) catalysts used in fuel cells. They have synthesized a nanoconjugate, cobalt(II) porphyrin(5,10,15-triphenyl-20-(4-aminophenyl)porphyrinatocobalt(II), CoTPP-NH2) covalently attached to acid-functionalized multi-walled carbon nanotubes. The nanoconjugate exhibits efficient ORR performance in basic medium, with an ORR onset potential similar to that of platinum-carbon electrodes.
Article
Chemistry, Physical
Devesh Kumar Singh, Murugasenapathi Natchimuthu Karuppusamy, Anshu Shrivastava, Tamilarasan Palanisamy, Indrajit Sinha, Vellaichamy Ganesan
Summary: This study integrates iron phthalocyanine (FePc) with sulfonic acid-functionalized multiwalled carbon nanotubes (MWCNTs-SO3H) to form a composite (FePc@MWCNTs-SO3H), which exhibits significantly improved kinetics and higher four-electron selectivity for electrochemical oxygen reduction reaction (ORR) compared to its counterpart without functionalization (FePc@MWCNTs) in alkaline, neutral, and acidic media. Through in situ electrochemical shell-isolated nanoparticle-enhanced Raman spectroscopy (EC-SHINERS) results and DFT calculations, it is proposed that sulfonate groups interact with the FeOOH intermediate through water-assisted hydrogen bonding, resulting in a substantial increase in ORR selectivity and kinetics. Besides ORR, this study strongly recommends manipulating functional groups on carbon support to enhance the kinetics and selectivity of various important chemical transformations.
Article
Chemistry, Physical
Mamta Yadav, Devesh Kumar Singh, Dharmendra Kumar Yadav, Piyush Kumar Sonkar, Rupali Gupta, Vellaichamy Ganesan
Summary: This study explores the effect of two different catalytic supports (multi-walled carbon nanotubes (MWCNTs) and nitrogen-doped multi-walled carbon nanotubes (NMWCNTs)) and two different catalysts (copper phthalocyanine (CuPc) and sulfonic acid functionalized CuPc (CuPc-SO3-)) on the oxygen reduction reaction (ORR) in an acidic medium. The composite NMWCNTs-CuPc-SO3- exhibits higher ORR activity and selectivity compared to other composites. The durability of NMWCNTs-CuPc-SO3- is attributed to the coordination of CuPc-SO3- with nitrogen (Cu-Nx) on the surface of NMWCNTs.
Article
Chemistry, Physical
Mamta Yadav, Devesh Kumar Singh, Vellaichamy Ganesan
Summary: Efficient and low-cost bifunctional electrocatalysts for oxygen electrocatalysis were developed using a template-free hydrothermal method to grow nickel sulfide on multi-walled carbon nanotubes. The annealed product (Ni-S@MWCNTs-500) exhibited improved oxygen evolution reaction and selective two-electron reduction of oxygen, with high mass activity and stability.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Tushar Kant, Kamlesh Shrivas, Tikeshwari, Vellaichamy Ganesan
Summary: We developed an inkjet-printed graphene paper electrode (IP-GPE) for analyzing mercuric ions (Hg(ii)) in industrial wastewater samples. Graphene (Gr) was fabricated on a paper substrate using a solution-phase exfoliation method with ethyl cellulose (EC) as a stabilizing agent. The IP-GPE showed good performance as a working electrode in electrochemical detection of Hg(ii). The method demonstrated a diffusion-controlled electrochemical detection with a correlation coefficient of 0.95 in cyclic voltammetry. IP-GPE also exhibited a wide linear range and low detection limit for the determination of Hg(ii) in wastewater samples.
Article
Energy & Fuels
Achayalingam Ramesh, Sourabh Basu, Vellaichamy Ganesan, Pawan Kumar Soni, Shanmugam Manivannan, Jeyakumar Kandasamy, Michael Sterlin Leo Hudson, Mohammad Abu Shaz
Summary: In this study, two-dimensional carbon nanosheets derived from biomass precursor were successfully synthesized through a cost-effective salt-templated process. The thickness and capacitance of the nanosheets were altered by adjusting the carbon precursor to salt-template ratio. Thinner carbon nanosheets exhibited superior electrochemical properties and capacitance compared to thicker ones, without the need for chemical activation.
Article
Chemistry, Multidisciplinary
Smita Singh, Mamta Yadav, Devesh Kumar Singh, Dharmendra Kumar Yadav, Piyush Kumar Sonkar, Vellaichamy Ganesan
Summary: A series of metal-organic frameworks (MOFs) with varying Ni : Co ratios were synthesized and characterized. Among them, NiCo-MOF (1 : 1) exhibited efficient electrocatalytic properties for water oxidation and HZ detection.
NEW JOURNAL OF CHEMISTRY
(2022)