Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Ehsan Jalilian, Guy Van Assche, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This study characterized the separate diffusion of water and ions in a polyethylene glycol diacrylate (PEGDA) coating using an integrated spectro-electrochemical technique. The ingress front position profile of ions in the coating was determined by fitting odd random phase electrochemical impedance spectroscopy (ORP-EIS) data with a physically relevant electrochemical equivalent circuit (EEC). The arrival time of ions at the coating/metal oxide interface was obtained from the EEC and verified through in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) measurements in the Kretschmann geometry integrated in the ORP-EIS set-up.
Article
Electrochemistry
Thomas Sanchez, Ekaterina Kurchavova, Viacheslav Shkirskiy, Jolanta Swiatowska, Vincent Vivier, Polina Volovitch
Summary: The study presented the role of local nanometric thinning in trivalent chromium conversion coating for the electrochemical stability of buried metal-oxide-model epoxy interface, and validated the local electrochemical impedance mapping (LEIM) as an effective tool for measuring and quantifying this impact.
ELECTROCHIMICA ACTA
(2021)
Article
Environmental Sciences
Yu Xing, Jing Li, Jingjing Yang, Junyi Li, Weiyi Pang, Francis L. Martin, Li Xu
Summary: This study used spectrochemical techniques to investigate the cytotoxicity of nanoplastics with different surface charges in HepG2 cells. The results showed that all three types of nanoplastics caused biomolecular alterations in cells, affecting cellular lipids, proteins, amino acids, and genetic material. Surface modifications were found to lead to cellular biochemical changes and adverse biological effects, with PS-NH2 exhibiting higher toxicity compared to PS or PS-COOH.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Monika A. Koperska, Jacek Bagniuk, Malgorzata M. Zaitz-Olsza, Katarzyna Gassowska, Dominika Pawcenis, Maciej Sitarz, Ewa Bulska, Joanna Profic-Paczkowska
Summary: This study investigates the degradation mechanism of silk fibroin through FTIR analysis. The results show that peptide bond oxidation occurs in the early stages of aging, regardless of conditions. Water introduction leads to significant changes in the hydrolysis of silk fibroin-based materials. The overall degradation level is affected by oxidation and hydrolysis, with decreased crystallinity and increased hydrolysis and oxidation observed in historical silk banners.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Aurelie Wahl, Melanie Davranche, Murielle Rabiller-Baudry, Mathieu Pedrot, Imane Khatib, Fabian Labonne, Marion Cante, Candice Cuisinier, Julien Gigault
Summary: Microplastics in soils, introduced through composting household waste, have been examined for their distribution and degradation in agricultural soil samples. The microplastics, mainly consisting of polyethylene, polypropylene, polystyrene, and polyvinylchloride, are present in the cultivated depth of the soil but have not migrated deeper. Advanced degradation, possibly due to composting, was observed.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Chemistry, Analytical
Polina S. Fomina, Mikhail A. Proskurnin, Boris Mizaikoff, Dmitry S. Volkov
Summary: This review discusses the analytical capabilities of Fourier-transform infrared spectroscopic techniques for analyzing aqueous solutions and provides examples.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
E. P. Kovalev, A. S. Shalygin, S. A. Prikhod'ko, N. Yu Adonin, O. N. Martyanov
Summary: In this study, the absorption of acetylene by ionic liquids (ILs) was investigated using in situ ATR-FTIR spectroscopy. The analysis revealed a correlation between the spectral changes of absorbed acetylene and the nature of ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Ceramics
Thomas Herisson de Beauvoir, Pierre-Louis Taberna, Patrice Simon, Claude Estournes
Summary: This paper presents the application of in situ impedance analysis in the Cold Sintering Process (CSP), specifically focusing on the influence of acetic acid on the sintering of ZnO and the resulting ceramics. The results demonstrate that this in situ characterization technique has the potential to be applied to a wide range of materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Biotechnology & Applied Microbiology
H. Otmacic Curkovic, D. Mikic, L. Bera, E. Kovacevic, M. Marcelja
Summary: The study aimed to examine corrosion behavior of bare and artificial patinated bronzes in urban outdoor atmosphere. Results showed that artificial patinas initially decreased corrosion resistance but improved over time, with certain combinations showing higher corrosion resistance than naturally patinated bronze.
CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
(2021)
Article
Chemistry, Multidisciplinary
Shaheed Ullah, Michael L. Mckee, Alexander Samokhvalov
Summary: The study reveals the molecular-level interactions between advanced nanomaterial and volatile organic sulfur compounds. The material shows high adsorption capacity for diethyl sulfide and can be easily regenerated by heating. This research is important for environmental remediation and understanding of adsorption mechanisms.
Article
Biotechnology & Applied Microbiology
Juan Zhao, Jing-Kang Cui, Rui-Xue Chen, Zi-Zhuo Tang, Zhi-Lei Tan, Lu-Ying Jiang, Fufeng Liu
Summary: A novel calculation and correction method was developed in this study for quantitative analysis of protein secondary structures in aqueous solutions. This method achieved good reproducibility and high accuracy, with results consistent with circular dichroism experiments and molecular simulations. The proposed method is suitable for directly analyzing protein secondary structures in aqueous solutions with a wide range of concentrations and in different buffer systems.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Electrochemistry
Jorge L. Matos, Vinicius Cerveira, Sara M. Manhabosco, Silvia P. G. Valenzuela, Deborah P. Dick, Luis F. P. Dick
Summary: The corrosion of Zn-coated steels in NaCl solution containing humic acid was studied, showing that humic acid initially slightly promoted corrosion but eventually acted as an inhibitor with an efficiency of around 90%. The formation of a secondary passive layer containing Zn humate was found to block the lateral growth of pits caused by corrosion.
ELECTROCHIMICA ACTA
(2021)
Article
Automation & Control Systems
Zhe Gong, Avram Kachura, Seyed Amir Assadi, Nicholas Cusimano, Joshua Piruzza, James Xu, Olivier Trescases
Summary: The inaccuracy of state-of-power and state-of-charge estimation in electric vehicle batteries leads to virtual loss of battery performance. An in-situ electrochemical impedance spectroscopy system is demonstrated to improve estimation accuracy. The impact of estimation errors on battery performance is quantified through simulations, and the accuracy of three common extraction techniques is examined. Experimental results show an improvement of approximately 8%-9% in SOP estimation accuracy compared to a baseline model.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Chemistry, Physical
Chun Yu, Weinan Dong, Weng Fu, Weiran Zuo, Bao Guo
Summary: This paper investigates the adsorption behavior of MBT onto chalcocite at different electrochemical potentials using SHINERS. The results show that adsorption is less favorable at negative potentials and can even be completely inhibited. The authors propose a cathodic passivating process and the formation of a passivation layer as the reasons for the prevention of adsorption after potentials switch back to positive. This study suggests that electrochemical controlled flotation can enhance the separation efficiency of chalcocite.
APPLIED SURFACE SCIENCE
(2022)
Article
Biochemical Research Methods
Pablo C. Serrano, Gisele E. Nunes, Lindiomar B. Avila Jr, Carleane P. S. Reis, Aldo M. C. Gomes, Francoise T. Reis, Maria L. Sartorelli, Silvia Pedroso Melegari, William G. Matias, Ivan H. Bechtold
Summary: Saxitoxin, a harmful cyanotoxin, requires monitoring in water bodies. An electrochemical impedimetric biosensor using a specific aptamer was developed for its detection, showing high sensitivity and selectivity.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Liu Tong, Dawei Zhang, Rongjun Zhang, Jinke Wang, Lingwei Ma, Patrick Keil, Arjan Mol, Xiaogang Li
Summary: Organic coatings are widely used to prevent corrosion of metals, but they are prone to defects and damages. Developing smart coatings that can detect corrosion and repair themselves is highly desirable. In this study, a corrosion-sensing and self-healing coating containing pH-sensitive microcontainers was designed. The coating showed excellent corrosion protection performance and could accurately report corrosion sites via coloration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
E. Michailidou, P. Visser, J. M. C. Mol, A. Kosari, H. Terryn, K. Baert, Y. Gonzalez -Garcia
Summary: The corrosion inhibiting effect of lithium carbonate has been studied under atmospheric corrosion conditions at the polymer/metal interface. It is found that lithium carbonate offers optimal corrosion protection under moderately alkaline conditions by forming a protective layer identified as aluminum-lithium layered double hydroxide. The presence of lithium carbonate triggers an active-to-passive transition, where anodic dissolution of the aluminum matrix is a crucial step before the formation of the protective layer. The resulting protective layer uniformly covers the surfaces of AA2024-T3 and lithium-containing AA2198-T8, preventing further corrosion reactions.
Review
Environmental Sciences
Prasaanth Ravi Anusuyadevi, Darsi Jaya Prasanna Kumar, A. D. H. V. Omkaara Jyothi, Neha S. Patwardhan, V. Janani, Arjan Mol
Summary: The need to maintain people's lifestyle in the face of global climate change, depletion of groundwater, mineral exhaustion, and water scarcity has led to the recycling and reuse of water from unlikely sources. Researchers have developed effective technologies for treating wastewater, ensuring water security in highly populated regions through centralized treatment facilities, and promoting water sustainability in rural areas through decentralized, renewable-energy-based treatment methodologies. This review article focuses on low-cost purification techniques for recycling wastewater in sparsely populated areas, proposing an electrochemical method for treating blackwater supernatant and other methods for treating solid sludge, which not only improve waste management but also produce value-added products.
Article
Materials Science, Multidisciplinary
Ming Liu, Jia-Ning Zhu, V. A. Popovich, E. Borisov, J. M. C. Mol
Summary: This study investigates the corrosion behavior of three NiTi shape memory alloys fabricated by laser-powder bed fusion (L-PBF) in a 0.9 wt.% NaCl solution at 37 degrees C. The passive film characteristics and corrosion resistance of L-PBF NiTi vary with their preparation process settings. The presence of defects, such as keyhole pores and cracks, on the L-PBF NiTi surfaces accelerates the passivation reaction process, but results in lower corrosion resistance compared to defect-free surfaces.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Mingtao Wang, Liwei Wang, Wendi Yang, Yuxi Liu, Herman Terryn, Zhongyu Cui
Summary: The effect of bisulfite (HSO3-) on the stress corrosion cracking (SCC) behavior of 7050-T7451 aluminum alloy in the presence of Cl- in a thin electrolyte layer environment is investigated. The addition of HSO3- inhibits corrosion initiation but promotes corrosion propagation and hydrogen uptake. Quantitative calculation demonstrates that HSO3- significantly facilitates the synergistic effect among stress, corrosion, and hydrogen, causing a shift in the controlling step of SCC from corrosion-induced hydrogen to mechanical-electrochemical-hydrogen interactions. The buffer effect of HSO3- plays a dominant role in the HSO3--induced acceleration of SCC degradation.
Article
Electrochemistry
Ziyu Li, Axel Homborg, Yaiza Gonzalez-Garcia, Peter Visser, Mohammad Soleimani, Arjan Mol
Summary: The influence of ageing under ambient conditions on the corrosion protective behavior of a lithium-based conversion layer on AA2024-T3 was investigated. Conversion layers aged for short times (0 h and 4 h) showed initial high corrosion inhibition but lower protectiveness after the inhibition stage. Conversion layers aged for longer times (24 h and 72 h) exhibited stable corrosion resistance higher than that of short-time aged samples. It is proposed that freshly-formed conversion layers trapped lithium ions and water molecules, leading to ongoing and heterogeneous growth under ambient conditions. Conversion layers with short ageing times provided early-stage active corrosion protection through lithium-ion release.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jinke Wang, Weimin Tan, Hao Yang, Xingxing Rao, Xinliang Luo, Lingwei Ma, Chenhao Ren, Arjan Mol, Dawei Zhang
Summary: An active protective epoxy coating with weathering resistant, corrosion-warning, and self-healing properties was developed by incorporating tannic acid (TA) loaded mesoporous silica (MSN-TA) nanocontainers. The introduction of MSN-TA nanocontainers could alleviate the coating degradation caused by UV irradiation. The coating containing 5 wt.% MSN-TA nanocontainers exhibited less degradation in surface morphology, wettability, and glossiness compared to the blank coating, and maintained a good barrier property after accelerated weathering.
NPJ MATERIALS DEGRADATION
(2023)
Article
Electrochemistry
Ziyu Li, Gaojie Li, Peter Visser, Axel Homborg, Yaiza Gonzalez-Garcia, Arjan Mol
Summary: This study uses scanning electrochemical microscopy (SECM) to characterize the evolution of local electrochemical surface activity during lithium-based conversion layer formation on aerospace aluminium alloy AA2024T3. It finds that different types of intermetallic particles show different levels of activity during different stages of conversion layer formation, and the overall reactivity of the surface decreases gradually over time.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Jin Yan, Lena Sophie Stickel, Lennart van den Hengel, Haoxu Wang, Prasaanth Ravi Anusuyadevi, Agnieszka Kooijman, Xiaohui Liu, Bahiya Ibrahim, Arjan Mol, Peyman Taheri, Luana Mazzarella, Olindo Isabella, Tom J. Savenije
Summary: In this study, the orientation of perovskite films grown by thermal evaporation was controlled by adjusting the intermediate annealing temperature. The highly oriented perovskite films exhibited improved photoluminescence and a more homogeneous surface potential distribution, suggesting that highly oriented growth is preferred for better charge extraction at the device level.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Luis Cutz, Ursa Tiringer, Wiebren de Jong, Arjan Mol
Summary: Long transport distances and extended storage of biomass pellets can lead to degradation due to moisture sorption. We developed a low-cost and environmentally friendly coating to reduce this degradation. The coating, based on TEOS and GPTMS precursors, was applied to untreated and torrefied wood pellets and significantly increased the water contact angle after a month of storage in a humid environment.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Applied
R. del Olmo, E. Lopez, E. Matykina, U. Tiringer, J. M. C. Mol, M. Mohedano, R. Arrabal
Summary: This study evaluated the corrosion resistance of Flash-PEO coatings on AA2024-T3 alloy with different sealing post-treatments. It was found that the HSG-Ce coating exhibited significant scratch protection during immersion in 3.5 wt% NaCl solution.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Applied
M. Meeusen, J. P. B. van Dam, N. Madelat, E. Jalilian, B. Wouters, T. Hauffman, G. Van Assche, J. M. C. Mol, A. Hubin, H. Terryn
Summary: In this study, a new finite element modelling (FEM) approach is used to simulate the spatiotemporally resolved water uptake in organic coatings. A physical model is developed considering both Fickian diffusion and the adsorption/desorption reaction of water on the polymer matrix. The model is validated and improved by comparing the calculated water concentration and virtual capacitance values with experimental measurements.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Ming Liu, Jia-Ning Zhu, V. A. Popovich, E. Borisov, J. M. C. Mol, Y. Gonzalez-Garcia
Summary: Electrochemical testing and surface analysis were used to study the corrosion behavior and passive film characteristics of 3D-printed NiTi shape memory alloys fabricated by laser-powder bed fusion (LPBF) in artificial saliva at 37 degrees C. The passivity of L-PBF NiTi was found to be influenced by process parameters and resulting surface properties. Defects on the surface of L-PBF NiTi promoted early stage passivation rate, but a slowly formed passive film showed the best corrosion protection. The thickness of the passive film was positively correlated with corrosion protection performance. L-PBF NiTi alloy prepared at a linear energy density of 0.2 J.m(-1) and volumetric energy density of 56 J.mm(-3) exhibited the least defects and best corrosion protection. An outer Ti-rich and inner Ni-rich dense passive film showed higher corrosion resistance.
Article
Chemistry, Multidisciplinary
Ehsan Rahimi, Donghoon Kim, Ruben Offoiach, Roger Sanchis-Gual, Xiang-Zhong Chen, Peyman Taheri, Yaiza Gonzalez-Garcia, Johannes M. C. Mol, Lorenzo Fedrizzi, Salvador Pane, Maria Lekka
Summary: Functional oxide nanoparticles have been widely used in biomedical applications due to their unique properties. However, the biodegradation mechanism of these nanoparticles, especially at the oxide/protein interfaces, is still not well understood. In this study, the electrochemical behavior, electronic properties, and biodegradation mechanism of cobalt ferrite (CFO) and cobalt ferrite-bismuth ferrite (CFO-BFO) core-shell nanoparticles in apoferritin-containing media were investigated. The results showed that the presence of a thin shell of BFO on CFO increased the surface potential. Both samples exhibited higher anodic current densities with decreasing pH and increasing apoferritin concentration. CFO-BFO showed lower anodic current densities compared to CFO, indicating lower electrochemical activity. Biodegradation of both nanoparticles was accelerated by high apoferritin concentrations and acidic media. This systematic study can help predict the lifespan and toxicity of functional nanoparticles in biological environments.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Metallurgy & Metallurgical Engineering
S. Aghaeian, J. C. Brouwer, W. G. Sloof, J. M. C. Mol, A. J. Bottger
Summary: Due to the harsh conditions in steel production, it is difficult to observe the compositional changes in the steel and oxide scale in real-time. A numerical model is developed to predict the formation of oxide phases and composition profile of steel alloy during external oxidation. The model is applied to high-temperature oxidation of Fe-Mn alloys and experimental data is used to determine the kinetic parameters. The simulations show that temperature and oxygen partial pressure affect the thickness of the depleted area.
HIGH TEMPERATURE CORROSION OF MATERIALS
(2023)
