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Hybrid Electrolyte engineering Enables Safe and Wide-Temperature Redox Flow Batteries

Angewandte Chemie 2021年第27期133卷

作者： Leyuan Zhang Prof. Guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA

Electrolyte is an important component in redox flow batteries (RFBs) that determines the current capability, potential window, and safety, but both aqueous and nonaqueous electrolytes have their intrinsic limits. Here, we develop the proof-of-concept hybrid electrolyte chemistry to enable the design of safe and wide-temperature RFBs. In addition to the non-flammable characteristics, the hybrid electrolyte also inherits the high electrochemical stability and wide operational temperature range. It can show a potential window of 2.5 V and maintain high ion conductivities at low temperatures. It also enables LiI to achieve high Coulombic efficiencies of >99.9 %, showing long cycling stability over 800 cycles. Moreover, it enables the successful operation of Zn/LiI RFBs at −20 °C for 150 cycles with nearly no capacity loss. This study highlights the great potential of hybrid electrolyte chemistry for the approach of safe and high-performance large-scale energy storage systems in wide temperature ranges.

关键词： electrolyte chemistry energy storage hybrid electrolyte redox flow batteries wide temperature range

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Electronic and magnetic properties of perovskite selenite and tellurite compounds: CoSeO3, NiSeO3, CoTeO3, and NiTeO3

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Physical Review B 2020年第4期101卷 045107-045107页

作者： A. Rafi M. Iasir Todd Lombardi Qiangsheng Lu Amir M. Mofrad Mitchel Vaninger Xiaoqian Zhang David J. Singh Nuclear Engineering Program University of Missouri Columbia Missouri 65211 USA Department of Physics and Astronomy University of Missouri Columbia Missouri 65211-7010 USA Department of Biomedical Biological and Chemical Engineering University of Missouri Columbia Missouri 65211 USA Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and Engineering Nanjing University Nanjing 210093 China Department of Chemistry University of Missouri Columbia Missouri 65211 USA

Selenium and tellurium are among the few elements that form ABO3 perovskite structures with a four valent ion in the A site. This leads to highly distorted structures and unusual magnetic behavior. Here we investigate the Co and Ni selenite and tellurite compounds, CoSeO3, CoTeO3, NiSeO3, and NiTeO3, using first principles calculations. We find an interplay of crystal field and Jahn-Teller distortions that underpin the electronic and magnetic properties. While all compounds are predicted to show an insulating G-type antiferromagnetic ground state, there is a considerable difference in the anisotropy of the exchange interactions between the Ni and Co compounds. This is related to the Jahn-Teller distortion. Finally, we observe that these four compounds show characteristics generally associated with Mott insulators, even when described at the level of standard density functional theory. These are then dense bulk insulators that are correctly described as insulators in a standard band structure picture but that satisfy the common experimental criteria to classify them as Mott-type insulators.

关键词： Antiferromagnetism Band gap Exchange interaction Jahn-Teller effect

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Zn-doped Nb 2 O 5 as a photocatalyst for rhodamine B degradation and antimicrobial applications: A study on doping concentration effects

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Ceramics International 2025年

作者： Cátia Liane Ücker Renato de Gouveia Cantoneiro Suelen Rodrigues Almeida Giovanni Mikael Noguera Fabra Darwin de Oliveira Brum Camila Cristina De Foggi Marcio Daldin Teodoro Fernando Dal Pont Morisso Valmor Roberto Mastelaro Cristiane Wienke Raubach Sergio da Silva Cava Mateus Meneghetti Ferrer Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas 96010-610 Pelotas RS Brazil Graduate Program in Engineering and Materials Science (PIPE) Federal University of Paraná 81531-990 Curitiba PR Brazil Department of Conservative Dentistry Dental Materials Laboratory School of Dentistry Federal University of Rio Grande do Sul 90035003 Porto Alegre RS Brazil Department of Physics Federal University of São Carlos 13565-905 São Carlos SP Brazil Postgraduate in Materials Technology and Industrial Processes Feevale University 93525-075 Novo Hamburgo RS Brazil São Carlos Institute of Physics University of São Paulo IFSC - USP 13566-590 São Carlos SP Brazil

Zn doped Niobium oxide (Nb 2 O 5 ) prepared by microwave-assisted hydrothermal synthesis was applied to Rhodamine B degradation and, for the first time, to antimicrobial applications. The influence of Zn incorporation in the structure was evaluated using various characterization techniques, including X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, photoluminescence (PL), and UV–visible spectroscopy. All samples exhibited low crystallinity of the pseudo-hexagonal phase due to the temperature used in the material synthesis. The results revealed that increasing the zinc content enhances the number of surface pores and that, up to 1.5 % zinc, reduces the bandgap value. Samples with up to 1.5 % zinc insertion demonstrated improved Rhodamine B dye decolorization efficiency, achieving 100 % decolorization efficiency within 120 min. However, higher zinc concentrations resulted in decreased RhB decolorization performance. Reusability tests confirmed the excellent stability of the samples. Furthermore, the 0.5-ZnNb and 1-ZnNb samples showed strong antimicrobial activity against different microorganisms. This study promotes the development of more sustainable and environmentally responsible processes by synthesizing Nb 2 O 5 with different zinc proportions. The resulting material is applied in both the degradation of organic pollutants and the microbial disinfection of wastewater. The adopted methodology aims to optimize photocatalytic antimicrobial efficiency, providing an effective and eco-friendly solution for effluent treatment, contributing to a cleaner and safer approach to contaminated water management.

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Miniaturized circuitry for capacitive self-sensing and closed-loop control of soft electrostatic transducers

arXiv

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arXiv 2020年

作者： Ly, Khoi Kellaris, Nicholas McMorris, Dade Johnson, Brian K. Acome, Eric Sundaram, Vani Naris, Mantas Humbert, J. Sean Rentschler, Mark E. Keplinger, Christoph Correll, Nikolaus Department of Mechanical Engineering University of Colorado BoulderCO United States Materials Science and Engineering Program University of Colorado BoulderCO United States Department of Electrical Engineering University of Colorado BoulderCO United States Department of Computer Science University of Colorado BoulderCO United States

Soft robotics is a field of robotic system design characterized by materials and structures that exhibit large-scale deformation, high compliance, and rich multifunctionality. The incorporation of soft and deformable structures endows soft robotic systems with the compliance and resiliency that makes them well-adapted for unstructured and dynamic environments. While actuation mechanisms for soft robots vary widely, soft electrostatic transducers such as dielectric elastomer actuators (DEAs) and hydraulically amplified self-healing electrostatic (HASEL) actuators have demonstrated promise due to their muscle-like performance and capacitive self-sensing capabilities. Despite previous efforts to implement self-sensing in electrostatic transducers by overlaying sinusoidal low-voltage signals, these designs still require sensing high-voltage signals, requiring bulky components that prevent integration with miniature, untethered soft robots. We present a circuit design that eliminates the need for any high-voltage sensing components, thereby facilitating the design of simple, low cost circuits using off-the-shelf components. Using this circuit, we perform simultaneous sensing and actuation for a range of electrostatic transducers including circular DEAs and HASEL actuators and demonstrate accurate estimated displacements with errors under 4%. We further develop this circuit into a compact and portable system that couples HV actuation, sensing, and computation as a prototype towards untethered, multifunctional soft robotic systems. Finally, we demonstrate the capabilities of our self-sensing design through feedback-control of a robotic arm powered by Peano-HASEL actuators. Copyright © 2020, The Authors. All rights reserved.

关键词： Electroactive polymer actuators

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Detecting mercury ions in water using a low-cost colorimetric sensor derived from immobilized silver nanoparticles on a paper substrate

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Environmental Nanotechnology, Monitoring and Management 2022年 18卷

作者： Budlayan, Marco Laurence Dalagan, Jhonnybert Lagare-Oracion, Jeanne Phyre Patricio, Jonathan Arco, Susan Latayada, Felmer Vales, Temmy Baje, Benito Alguno, Arnold Capangpangan, Rey Department of Physics School of Science and Engineering Ateneo de Manila University Quezon City 1108 Philippines Department of Chemistry Caraga State University Butuan City 8600 Philippines Materials Science and Polymer Chemistry Laboratory Caraga State University Butuan City 8600 Philippines Materials Science Engineering Program College of Science University of the Philippines Diliman Quezon City 1101 Philippines Synthetic Organic Chemistry Laboratory Institute of Chemistry University of the Philippines Diliman Quezon City 1101 Philippines Physics Unit Philippine Science High School Central Visayas Campus Talaytay Argao 6021 Cebu Philippines Department of Physics Mindanao State University-Iligan Institute of Technology Tibanga Iligan City 9200 Philippines Department of Physical Sciences and Mathematics College of Marine and Allied Sciences Mindanao State University at Naawan Poblacion Naawan 9023 Misamis Oriental Philippines

The exceptional and specific reactivity of mercury ions (Hg2+) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to hel... 详细信息

The exceptional and specific reactivity of mercury ions (Hg²⁺) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to help address the detrimental effects of heavy metal contamination particularly in rural communities. In this paper, we present the plasmonic and colorimetric sensing of Hg²⁺ using a paper-based sensing material derived from thiamine-functionalized (ThAgNPs) that were immobilized on a commercial filter paper. Plasmonic AgNPs with a surface plasmon resonance peak at 420 nm and a size of about 21.3 nm were synthesized by a chemical reduction technique. Fourier transform infrared spectroscopy revealed the characteristic functional groups of thiamine in the spectra of AgNPs, thereby confirming the functionalization of AgNPs. The successful integration of ThAgNPs onto the Whatman filter paper (WFP) matrix was confirmed by the UV–vis and SEM-EDX results. An evident color change from yellowish to white was manifested by the fabricated WFP-ThAgNP sensor in the presence of Hg²⁺ with an appreciable detection of up to 0.5 µM using the naked eye. The colorimetric response of the sensor was also found to be selective towards Hg²⁺ after testing with different metal ions. Moreover, the response was consistent for tap, and creek water samples spiked with Hg²⁺. The results of this work provide a promising baseline technology for the development of an affordable, fast, portable, and reliable sensor that can be used for on-site detection and monitoring of Hg²⁺ levels in the water. © 2022 Elsevier B.V.

关键词： Colorimetric sensor Mercury detection Paper-based device Silver nanoparticle Thiamine

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Morphological Characterization of Brazil Nut Tree (Bertholletia excelsa) Fruit Pericarp

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Journal of Renewable materials 2019年第7期7卷 683-692页

作者： Gustavo P.Petrechen Marcos Arduin JoséD.Ambrósio Materials Science and Engineering Postgraduate Program Federal University of São CarlosSão CarlosBrazil Center of Characterization and Materials Development Federal University of São CarlosSão CarlosBrazil Department of Botany Federal University of São CarlosSão CarlosBrazil Citlab-Science Innovation and Technology LaboratorySorocabaBrazil

This article presents the overall morphological structure of the Brazil nut tree(Bertholletia excelsa)fruit pericarp,from macro to nano *** acquired knowledge would be used for the development of new applications,like using the materials as fillers for biocomposites,or as a hierarchical architecture model for *** research was performed using stereo and light microscopy and conventional and force field emission scanning electron *** pericarp presents three layers:the exocarp,a dark gray,brittle and fragile outer layer;the mesocarp,a beige,dry,rigid,impermeable and fibrous intermediate layer;and the endocarp,an inner layer with similar characteristic as the exocarp,but formed next to the ***,the exocarp and the endocarp presented minor regions of sclereids,fibers and vascular cell bundles,inside major regions of parenchyma *** mesocarp presents a structure of fiber cells regions alternating with sclereids and vascular cells regions,arranged in a composite like arrangement,with the fibers cells bundles acting as randomly oriented disperse phases in a sclereid cells *** arrangement was associated with the mesocarp relative superior proprieties,indicating a great material for using as fillers for biocomposites or in biomimetics applications.

关键词： Bertholletia excelsa brazil nut fruit pericarp morphological structure microscopy

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On sparse identification of complex dynamical systems: a study on discovering influential reactions in chemical reaction networks

arXiv

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arXiv 2020年

作者： Harirchi, Farshad Kim, Doohyun Khalil, Omar Liu, Sijia Elvati, Paolo Baranwal, Mayank Hero, Alfred Violi, Angela Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109–2125 United States Department of Mechanical Engineering University of Michigan Ann ArborMI48109–2125 United States Departments of Chemical Engineering Biomedical Engineering Macromolecular Science and Engineering Biophysics Program University of Michigan Ann ArborMI48109–2125 United States

A wide variety of real life complex networks are prohibitively large for modeling, analysis and control. Understanding the structure and dynamics of such networks entails creating a smaller representative network that preserves its relevant topological and dynamical properties. While modern machine learning methods have enabled identification of governing laws for complex dynamical systems, their inability to produce white-box models with sufficient physical interpretation renders such methods undesirable to domain experts. In this paper, we introduce a hybrid black-box, white-box approach for the sparse identification of the governing laws for complex, highly coupled dynamical systems with particular emphasis on finding the influential reactions in chemical reaction networks for combustion applications, using a data-driven sparse-learning technique. The proposed approach identifies a set of influential reactions using species concentrations and reaction rates, with minimal computational cost without requiring additional data or simulations. The new approach is applied to analyze the combustion chemistry of H2 and C3H8 in a constant-volume homogeneous reactor. The influential reactions determined by the sparse-learning method are consistent with the current kinetics knowledge of chemical mechanisms. Additionally, we show that a reduced version of the parent mechanism can be generated as a combination of the significantly reduced influential reactions identified at different times and conditions and that for both H2 and C3H8 fuel, the reduced mechanisms perform closely to the parent mechanisms as a function of the ignition delay time over a wide range of conditions. Our results demonstrate the potential of the sparse-learning approach as an effective and efficient tool for dynamical system analysis and reduction. The uniqueness of this approach as applied to combustion systems lies in the ability to identify influential reactions in specified conditions and times dur

关键词： Learning systems

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3D printing and bioprinting using multiphoton lithography

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Bioprinting 2020年 20卷

作者： Zuev, Dmitry M. Nguyen, Alexander K. Putlyaev, Valery I. Narayan, Roger J. Department of Materials Science Lomonosov Moscow State University Russian Federation Department of Biomedical Engineering North Carolina State University United States

3D printing based on multiphoton absorption is playing a growing role in biomedical engineering and regenerative medicine. Multiphoton lithography is a 3D printing approach that is based on the multiphoton absorption process. The review focuses on the use of multiphoton lithography to create microneedles, microfluidic devices, nanoprobes, filters, and tissue engineering scaffolds with sub-micrometer scale features. The fundamental requirements of the multiphoton absorption process are described. Efforts to increase the processing rate as well as understand the bioresorbability of multiphoton lithography-created structures are discussed. Improvements to the biocompatibility of the polymers and photoinitiators used in multiphoton lithography are considered. The multiphoton lithography process offers unique opportunities to process tissue engineering scaffolds with small-scale features. © 2020 Elsevier B.V.

关键词： 3D printing Biocompatibility Cytotoxicity Multiphoton lithography Tissue engineering scaffold

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Fluctuating risk of acute kidney injury-related mortality for four weeks after exposure to air pollution: A multi-country time-series study in 6 countries

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Environment International 2024年 183卷 108367页

作者： Min, Jieun Kang, Duk-Hee Kang, Cinoo Bell, Michelle L. Kim, Ho Yang, Juyeon Gasparrini, Antonio Lavigne, Eric Hashizume, Masahiro Kim, Yoonhee Fook Sheng Ng, Chris Honda, Yasushi das Neves Pereira da Silva, Susana Madureira, Joana Leon Guo, Yue Pan, Shih-Chun Armstrong, Ben Sera, Francesco Masselot, Pierre Schwartz, Joel Maria Vicedo-Cabrera, Ana Pyo Lee, Jung Al-Aly, Ziyad Won Lee, Jung Kwag, Youngrin Ha, Eunhee Lee, Whanhee Department of Environmental Medicine College of Medicine Ewha Womans University Seoul Korea Republic of Graduate Program in System Health Science and Engineering College of Medicine Ewha Womans University Seoul Korea Republic of Division of Nephrology Department of Internal Medicine Ewha Womans University School of Medicine Ewha Medical Research Center Seoul Korea Republic of Department of Public Health Sciences Graduate School of Public Health Seoul National University Seoul Korea Republic of Yale School of the Environment Yale University New HavenCT United States Biostatistics Collaboration Unit Yonsei University College of Medicine Seoul Korea Republic of Lab Department of Public Health Environments and Society London School of Hygiene & Tropical Medicine London United Kingdom School of Epidemiology & Public Health Faculty of Medicine University of Ottawa Ottawa Canada Department of Global Health Policy Graduate School of Medicine The University of Tokyo Tokyo Japan Department of Global Environmental Health Graduate School of Medicine University of Tokyo Tokyo Japan School of Tropical Medicine and Global Health Nagasaki University Nagasaki Japan Center for Climate Change Adaptation National Institute for Environmental Studies Tsukuba Japan Department of Epidemiology Instituto Nacional de Saúde Dr. Ricardo Jorge Lisbon Portugal EPIUnit-Institute of Public Health University of Porto Porto Portugal Porto Portugal College of Medicine and NTU Hospital Taipei Taiwan National Institute of Environmental Health Science National Health Research Institutes Zhunan Taiwan Department of Public Health Environments and Society London School of Hygiene & Tropical Medicine London United Kingdom Department of Statistics Computer Science and Applications "G. Parenti" University of Florence Florence Italy Department of Environmental Health Harvard T.H. Chan School of Public Health BostonMA United States Institute of Social and Preventive Medicine Universi

Background: Recent studies have reported that air pollution is related to kidney diseases. However, the global evidence on the risk of death from acute kidney injury (AKI) owing to air pollution is limited. Therefore, we investigated the association between short-term exposure to air pollution—particulate matter ≤ 2.5 μm (PM2.5), ozone (O3), and nitrogen dioxide (NO2)—and AKI-related mortality using a multi-country dataset. Methods: This study included 41,379 AKI-related deaths in 136 locations in six countries during 1987–2018. A novel case time-series design was applied to each air pollutant during 0–28 lag days to estimate the association between air pollution and AKI-related deaths. Moreover, we calculated AKI deaths attributable to non-compliance with the World Health Organization (WHO) air quality guidelines. Results: The relative risks (95% confidence interval) of AKI-related deaths are 1.052 (1.003, 1.103), 1.022 (0.994, 1.050), and 1.022 (0.982, 1.063) for 5, 10, and 10 µg/m3 increase in lag 0–28 days of PM2.5, warm-season O3, and NO2, respectively. The lag-distributed association showed that the risk appeared immediately on the day of exposure to air pollution, gradually decreased, and then increased again reaching the peak approximately 20 days after exposure to PM2.5 and O3. We also found that 1.9%, 6.3%, and 5.2% of AKI deaths were attributed to PM2.5, warm-season O3, and NO2 concentrations above the WHO guidelines. Conclusions: This study provides evidence that public health policies to reduce air pollution may alleviate the burden of death from AKI and suggests the need to investigate the several pathways between air pollution and AKI death. © 2023 The Author(s)

关键词： Air quality

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A ventilated perfused lung model platform to dissect the response of the lungs to viral infection

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Trends in Biotechnology 2025年

作者： Derman, I. Deniz Alioglu, Mecit Altan Moses, Joseph Christakiran Chroneos, Zissis C. Yilmaz, Yasar Ozer Banerjee, Dishary Koff, Jonathan Rizvi, Syed Hasan Askari Klunk, Danielle Nicole Celik, Nazmiye Pochareddy, Sirisha Umstead, Todd M. Namli, Ilayda Holton, Sarah E. Mikacenic, Carmen Thompson, Jessica L. Castaneda, Diana Cadena Hickey, Danielle Reifsnyder Nagamine, Momoka Warang, Prajakta Schotsaert, Michael Chen, Phylip Peeples, Mark E. Palucka, Karolina Ozbolat, Ibrahim T. Engineering Science and Mechanics Department Penn State University University Park PA16802 United States The Huck Institutes of Life Sciences Penn State University University Park PA16802 United States Department of Pediatrics Penn State University College of Medicine HersheyPA17033 United States Department of Cell and Biological Systems Penn State University College of Medicine HersheyPA United States Department of Nanoscience and Nanoengineering Istanbul Technical University Istanbul Turkey Department of Cardiology School of Medicine University of California San Diego La JollaCA92093 United States Department of Medicine Yale University New HavenCT06520 United States Biomedical Engineering Department Penn State University University Park PA16802 United States Genome Sciences Core Penn State University College of Medicine HersheyPA17033 United States Translational Immunology Department Benaroya Research Institute SeattleWA98101 United States Department of Pulmonary Critical Care & Sleep Medicine University of Washington SeattleWA98195 United States Chemistry Department Penn State University University Park PA16802 United States The Jackson laboratory for Genomic Medicine FarmingtonCT06032 United States Department of Materials Science and Engineering Penn State University University Park PA16802 United States Materials Research Institute Penn State University University Park PA16802 United States Department of Microbiology Icahn School of Medicine at Mount Sinai New YorkNY United States Global Health and Emerging Pathogens Institute Icahn School of Medicine at Mount Sinai New YorkNY United States Center for Vaccines and Immunity Abigail Wexner Research Institute at Nationwide Children's Hospital ColumbusOH43205 United States Department of Pediatrics College of Medicine The Ohio State University ColumbusOH43210 United States Infectious Disease Institute The Ohio State University ColumbusOH43210 United States Cancer Ins

In this study, we developed a 3D lung model that incorporated alveolar and vascular components, allowing for the investigation of lung physiology and responses to infection. We investigated the role of ventilation in formation of the alveolar epithelial layer and its response to viral infections. We subjected our perfused model to a continuous respiratory cycle at the air–liquid interface (ALI) for up to 10 days. The results revealed that ventilation increased tight-junction formation with better epithelial barrier function over time. Two viruses, influenza and respiratory syncytial virus (RSV), were tested, where ventilation enhanced infectivity with an increased progression of viral spread over time while sensitizing the epithelium for viral recognition. Ventilation also attenuated the production of key proinflammatory chemokines. Our findings represent a critical step forward in advancing our understanding of lung-specific viral responses and respiratory infections in response to ventilation, shedding light on vital aspects of pulmonary physiology and pathobiology. © 2025 Elsevier Ltd

关键词： Lung cancer

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