Article
Polymer Science
Yago Araujo Vieira, Rosana Oliveira Henriques, Danyelle Gurgel, Diana Hartmann, Ricardo Antonio Francisco Machado, Debora de Oliveira, Bruno Francisco Oechsler, Agenor Furigo Jr
Summary: This study evaluates the potential of polyacrylonitrile particles (PAN) as a support for laccase immobilization. The immobilization yield of laccase was significantly improved using chemically modified PAN particles. The PAN/laccase derivative showed higher activity and stability at low pH and appropriate temperature, indicating the potential of PAN as a new support for laccase immobilization.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Murat Uygun, Victor de la Asuncion-Nadal, Sinem Evli, Deniz Akta Uygun, Beatriz Jurado-Sanchez, Alberto Escarpa
Summary: Laccase-based micromotors were synthesized and used for decolorization of azo dyes in textile wastewater, showing improved dye removal capacity compared to the free enzyme approach. The stability of the immobilized enzyme was enhanced, resulting in higher decolorization efficiencies of 76-94% compared to 34-55% using free enzyme.
APPLIED MATERIALS TODAY
(2021)
Article
Electrochemistry
Noemie Lalaoui, Kilian Gentil, Ilyass Ghandari, Serge Cosnier, Fabien Giroud
Summary: In this study, coated gold nanoparticles with nitrobenzoic moieties were synthesized and physically adsorbed onto multi-walled carbon nanotubes electrodes. These functionalized nanoparticles exhibited good catalytic properties in oxygen reduction reaction and glucose oxidation, showing potential applications.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Jian Peng, Enhui Wu, Xiaoxuan Lou, Qian Deng, Xiaohong Hou, Chongning Lv, Qi Hu
Summary: In this study, a MOF/PVA/Lac composite with excellent enzymatic properties for degrading AQs and removing alizarin green efficiently was synthesized. The degradation product p-toluidine was identified using molecular docking, mass spectrometry, and 2DNMR, confirming the reaction mechanism C-alpha oxidation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Monica Brachi, Fabien Giroud, Serge Cosnier, Alan Le Goff
Summary: In this study, we report a method to modify carbon nanotubes using alkyne-modified diazonium salts and alkyne-modified pyrene, followed by photo-irradiated thiol-yne click reaction. The results demonstrate that the photo-irradiation provides the highest reaction yields. The functionalized carbon nanotubes enable mediated bioelectrocatalytic glucose oxidation under low overpotential and high current density conditions.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Multidisciplinary Sciences
Hyeryeong Lee, Eun Mi Lee, Stacy Simai Reginald, In Seop Chang
Summary: This study compared the effects of different gold-binding peptides fused to enzymes on electrocatalytic activity, bioactivity, and material-binding behaviors, demonstrating the vital role of GBP type in the design, construction, and optimization of enzyme-modified electrodes for efficient interfacial DET in DET-based enzyme-electrode systems.
Article
Biophysics
Davide Tocco, Dorothea Wisser, Marcus Fischer, Wilhelm Schwieger, Andrea Salis, Martin Hartmann
Summary: The laccase from Aspergillus sp. was immobilized on functionalized silica hierarchical MFI zeolite. The immobilized biocatalyst was characterized by various analytical techniques, confirming the chemical anchoring of the enzyme to the zeolitic support. The immobilized laccase showed good stability and activity under acidic pH conditions.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Review
Biophysics
Jiawei Lu, Mingfu Nie, Youran Li, Huilin Zhu, Guiyang Shi
Summary: Enzyme immobilization techniques have evolved significantly, with composite materials playing a crucial role as support materials. Composite nanomaterials, compared to single-component nanomaterials, demonstrate superior performance in enzyme immobilization and other applications. This review aims to provide insights into the design principles of composite nanomaterials for immobilization supports.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Review
Chemistry, Applied
Kwon-Young Choi
Summary: Indigo dyeing technology generates hazardous by-products and sludge, causing environmental pollution. Biological treatments using enzymes have been spotlighted as a green solution, but process design and enzyme production strategy must be optimized for cost-effectiveness. Furthermore, attention should be given to electron mediators supply and unexpected by-products removal during the whole process.
Review
Biochemistry & Molecular Biology
Alexandra Virginia Bounegru, Constantin Apetrei
Summary: In recent years, researchers have focused on developing simple and efficient methods based on electrochemical biosensors to determine hydroxycinnamic acids from various real samples. Enzymatic biosensors represent a promising, low-cost technology for direct monitoring of these important compounds. Immobilization techniques are crucial for stability and obtaining accurate results, and nanomaterials have been utilized to improve enzyme immobilization and electron transport rates.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Florencia Alejandra Bruera, Gustavo Raul Kramer, Juan Ernesto Velazquez, Marcela Alejandra Sadanoski, Maria Isabel Fonseca, Alicia Esther Ares, Pedro Dario Zapata
Summary: Nanoporous aluminum oxide coating was successfully synthesized and used for Laccase immobilization with high enzymatic activity and stability. The bionanocatalyst showed better pH stability and higher Black Liquor removal efficiency compared to free laccase.
SURFACES AND INTERFACES
(2022)
Article
Agricultural Engineering
Chunyang Bao, Yan Wang, Xiaoling Xu, Die Li, Jing Chen, Zhangbin Guan, Bingyu Wang, Mei Hong, Jingyu Zhang, Tianheng Wang, Qiang Zhang
Summary: A facile strategy was developed for the reversible immobilization of enzymes by utilizing non-covalent interaction between protein and carbohydrate. Laccase was successfully immobilized onto glycopolymer microspheres with high enzyme loading and yield, showing enhanced pH stability and activity in biodegradation. The immobilized laccases could be recycled multiple times while the glycopolymer microspheres could be efficiently regenerated for further enzyme immobilization, making them potential reusable carriers for different enzymes.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Shohreh Ariaeenejad, Elaheh Motamedi, Ghasem Hosseini Salekdeh
Summary: This study reports the synthesis of nanocellulose from quinoa husks and its utilization as a carrier for immobilizing a model laccase enzyme. The immobilized enzyme demonstrated efficient removal of malachite green and congo red dyes through a synergistic adsorption degradation approach. This immobilized PersiLac1 enzyme showed remarkable improvement in dye removal and exhibited superior reusability and performance in treating complex textile effluents.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
A. M. Girelli, E. Pambianco, F. R. Scuto
Summary: In this study, laccase from white-rot fungi was immobilized onto delignified spent grain and used for the efficient removal of synthetic dyes from industrial effluents, showing the potential value of biocatalysts in industrial wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Lei Wang, Yuanyuan Liu, Juan Han, Yihan Liu, Huiling Lan, Chunmei Li, Yun Wang
Summary: Inspired by natural biomineralization, researchers have created a morphology-dependent intelligent enzyme-nanoMOFs@aptamers biocatalyst, which enhances substrate aptamers binding and catalytic activity through in situ tailoring of enzyme-nanoMOFs morphology. The resulting nanoflowers achieve on-demand tuning of functionality and enable automatic magnetic separation and cyclic catalysis through structure switch.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Civil
Matthew J. Catenacci, Jeffery R. Owens, Heather R. Luckarift
Summary: Using 3D printing technology, the study investigated the influence of cell geometry and infill materials on the physical properties of geometrically patterned matrices, revealing that matrices reinforced with sand, gravel, or mixtures of the two exhibit better compressive strength than conventional concrete, with potential applications in airfield damage repair. Additionally, a hexagonal geometry with specific density infilled with a mixture of sand and gravel demonstrated maximum strength comparable to conventional concrete, suggesting potential for achieving even higher strength at larger scales with lower relative density.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Engineering, Civil
Rachel Krebs, Jeffery Owens, Heather Luckarift
Summary: HFC-based fire extinguishing agents generate harmful HF(g) which needs real-time detection to prevent exposure levels exceeding IDLH levels. Current commercial sensors are limited in capability for measuring high concentrations of HF.
FIRE SAFETY JOURNAL
(2022)
Article
Chemistry, Physical
Dorottya Hursan, Marietta Abel, Kornelia Baan, Edvin Fako, Gergely F. Samu, Huu Chuong Nguyen, Nuria Lopez, Plamen Atanassov, Zoltan Konya, Andras Sapi, Csaba Janaky
Summary: By synthesizing a set of N-C catalysts with identical morphologies and systematically changing the precursors, the study found that the CO2 reduction activity of these catalysts is correlated with the chemical composition, and the activity trend is similar in different reaction scenarios.
Article
Chemistry, Physical
Michele Ferri, Laurent Delafontaine, Shengyuan Guo, Tristan Asset, Pierangela Cristiani, Sebastiano Campisi, Antonella Gervasini, Plamen Atanassov
Summary: Copper has unique capabilities in CO2 reduction reactions, but faces challenges in industrial-scale applications. Modifying copper-based catalysts with acidic/basic functionalities can optimize selectivity and reduce overpotentials in CO2RR.
ACS ENERGY LETTERS
(2022)
Review
Chemistry, Physical
Carlo Santoro, Paolo Bollella, Benjamin Erable, Plamen Atanassov, Deepak Pant
Summary: The oxygen reduction reaction (ORR) is critical for energy conversion, corrosion, and chemical technologies. It plays a significant role in biological processes and is widely used in bioelectrochemical devices and systems. Researchers are currently studying the specifics of the ORR in close-to-neutral environments and analyzing catalyst limitations and technological challenges associated with oxygen depolarization.
Article
Chemistry, Physical
Alessio Cosenza, Laurent Delafontaine, Alvin Ly, Hanson Wang, Eamonn Murphy, Yuanchao Liu, Stefania Specchia, Plamen Atanassov
Summary: In this study, a set of PGM-free mono-metallic electrocatalysts were synthesized using multiple silica templates and a modified acid-free sacrificial support method. The iron-based electrocatalysts showed higher activity for oxygen reduction reaction (ORR) compared to other catalysts.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Valerio C. A. Ficca, Carlo Santoro, Ernesto Placidi, Fabrizio Arciprete, Alexey Serov, Plamen Atanassov, Barbara Mecheri
Summary: The oxygen reduction reaction (ORR) is crucial for the conversion of energy in fuel cells, and platinum group metal-free (PGM-free) electrocatalysts show promise as alternatives to Pt/C electrocatalysts. However, evaluating the performance of PGM-free catalysts requires specific activity descriptors, and differentiating between the primary and secondary sites of these catalysts can be challenging. In this study, a method for evaluating the interaction between probing molecules and primary and secondary sites of PGM-free electrocatalysts was proposed, with the results suggesting the exchange current density as an effective tool for discriminating poisoning of specific active sites.
Article
Chemistry, Physical
Shengyuan Guo, Yuanchao Liu, Ying Huang, Hanson Wang, Eamonn Murphy, Laurent Delafontaine, Jiazhe Loki Chen, Iryna V. Zenyuk, Plamen Atanassov
Summary: Acetic acid/acetate is an important precursor for chemical manufacturing and biofuel synthesis. Carbon monoxide electrolysis can enhance the selectivity for multicarbon products, and this research explores practical approaches to improve acetate and 1-propanol selectivity and yield using a copper catalyst. The pH and catalyst loading were found to strongly influence the performance, and in situ Raman and multiphysics modeling provided insights into the mechanism of improvement.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Laurent Delafontaine, Alessio Cosenza, Eamonn Murphy, Yuanchao Liu, Jiazhe Chen, Baiyu Sun, Plamen Atanassov
Summary: The renewable electroreduction of CO2 to CO is crucial for future clean energy scenarios, as it allows for the recycling of carbon emissions into value-added chemicals. Non-PGM and M-N-C catalysts show high selectivity for CO and H2 formation, making them ideal candidates for these applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Margaret A. Fitzgerald, Hanson Wang, Alvin Ly, Jayson Foster, Matthew Sorrells, Tristan Asset, Plamen Atanassov, Svitlana Pylypenko
Summary: Polymer electrolyte membrane fuel cells are a promising commercial technology, but there are challenges regarding the utilization and stability of Pt catalysts. This study investigates the effects of nitrogen on the nucleation and stability of Pt catalyst nanoparticles deposited on N-doped carbon supports. Through analysis using XPS and TEM, trends related to nitrogen speciation are identified. The systematic incorporation of high throughput machine-learning-based imaging analysis and identical-location microscopy provides mechanistic insights for catalysis and fuel cells applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kerstin Koeble, Monja Schilling, Laszlo Eifert, Nico Bevilacqua, Kieran F. Fahy, Plamen Atanassov, Aimy Bazylak, Roswitha Zeis
Summary: This study demonstrates the importance of electrode modifications in vanadium redox flow batteries and provides insights into the effects of different modifications on electrochemical performance, wetting behavior, and tendency towards hydrogen evolution side reactions through synchrotron X-ray imaging and traditional characterization approaches.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Kaustubh Khedekar, Andrea Zaffora, Monica Santamaria, Matthew Coats, Svitlana Pylypenko, Jonathan Braaten, Plamen Atanassov, Nobumichi Tamura, Lei Cheng, Christina Johnston, Iryna V. Zenyuk
Summary: Fuel cell heavy-duty vehicles (HDVs) require more durable oxygen-reduction-reaction electrocatalysts, and understanding the realistic degradation mechanisms is crucial. The study investigated the movement and degradation of electrocatalysts in membrane electrode assemblies using micro-X-ray fluorescence spectroscopy. It was found that the electrocatalyst exhibited heavy in-plane movement and preferential movement away from cracks in the cathode catalyst layer. By performing further experiments, the correlation between the increase in nanoparticle size of the electrocatalyst and loading change was discovered. This research provides insights for developing mitigation strategies and durable electrocatalysts in structured cathode catalyst layers.
Article
Chemistry, Physical
Valerio C. A. Ficca, Carlo Santoro, Ernesto Placidi, Fabrizio Arciprete, Alexey Serov, Plamen Atanassov, Barbara Mecheri
Summary: The oxygen reduction reaction (ORR) is crucial for energy conversion in fuel cells, but requires an electrocatalyst. Platinum group metal-free (PGM-free) electrocatalysts are a promising alternative to Pt/C, but their evaluation requires specific activity descriptors. This study proposes a method for evaluating the chemisorption interaction of probing molecules with PGM-free primary and secondary sites to effectively evaluate site density. The results identify the exchange current density as a tool for discriminating specific site poisoning.
Article
Materials Science, Multidisciplinary
David Sebastian, Stefano Trocino, Carmelo Lo Vecchio, Alexey Serov, Plamen Atanassov, Vincenzo Baglio
Summary: Dye-sensitized solar cells (DSSCs) heavily rely on the counter electrode for their performance. Platinum (Pt) has been traditionally used as a counter-electrode material, but its limitations have led to the exploration of alternative materials such as iron-nitrogen-carbon (Fe-N-C) catalysts. This study investigates the performance of Fe-N-C materials as counter electrodes in DSSCs and provides insights for the development of this sustainable technology.
MATERIALS FOR RENEWABLE AND SUSTAINABLE ENERGY
(2023)
Article
Chemistry, Applied
Mohsin Muhyuddin, Giorgio Tseberlidis, Maurizio Acciarri, Oran Lori, Massimiliano D'Arienzo, Massimiliano Cavallini, Plamen Atanassov, Lior Elbaz, Alessandro Lavacchi, Carlo Santoro
Summary: Hydrogen production via water electrolysis is a promising energy solution, but the sluggish hydrogen evolution reaction (HER) hampers its progress. Molybdenum disulfide (MoS2) has emerged as a reliable alternative to expensive platinum group metal (PGM) catalysts. This comprehensive review summarizes recent scientific endeavors to enhance the HER activity of MoS2-based electrocatalysts through various fabrication methods and provides insights into the factors influencing their performance.
JOURNAL OF ENERGY CHEMISTRY
(2023)