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SSRN 2023年

作者： Tian, Mi Gan, Wenjun Oh, Eun-Souk School of Chemical Engineering University of Ulsan 93 Daehak-ro Nam-Gu Ulsan44610 Korea Republic of Department of Macromolecular Materials and Engineering College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai201620 China

An attractive anode material, silicon, suffers fast capacity fading due to the electrical isolation from massive volumetric expansion upon cycling. However, it holds high theoretical capacity and low operation voltage in its practical application. In this study, a new water-based binder, MXene clay/hollow core-shell acrylate composite, was synthesized through an in-situ emulsion polymerization technique to alleviate the fast capacity fading of the silicon anode efficiently. The efficient introduction of conductive MXene clay and the hollow core-shell structure, favorable to electrons and ions transport in silicon-based electrodes, gives a novel conceptual design of the binder material. Such a strategy could alleviate electrical isolation after cycling and promise the better electrochemical performance of the high-capacity anodes. The effect of the MXene introduction and hollow core-shell on the binder performance thoroughly investigates using various characterization tools by comparing with no MXene-containing, core-shell acrylate, and commercial styrene-butadiene latex binders. Consequently, the silicon-based electrode containing the MXene clay/hollow core-shell acrylate binder exhibits high-capacity retention of 1351 mAh g-1 at 0.5 C after 100 cycles and good rate capability over 1100 mAh g-1 at 5 C. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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Design and Optimization of the Porous Metamaterial EM Absorbers in X-band

Design and Optimization of the Porous Metamaterial EM Absorb...

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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Kanat Anurakparadorn Alan Taub Eric Michielssen Macromolecular Science and Engineering Program Department of Material Science and Engineering University of Michigan Ann Arbor Michigan USA Department of Mechanical Engineering University of Michigan Ann Arbor Michigan USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor Michigan USA

A strategy that combines experiment and simulation to design and optimize electromagnetic (EM) metamaterial absorbers containing a periodic porous structure is described. The approach provides the ability to produce absorbers that meet multiple user-specified objectives. Using the measured intrinsic properties of the baseline materials as an input to EM-field based computational modelling and optimization, absorption by the studied metamaterials measured by their reflection loss (RL) increases significantly. The resulting metamaterials have the potential for lower cost and lighter weight while providing greater protection than traditional metal gaskets and foams.

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Colloidal interactions to generate novel coatings

Colloidal interactions to generate novel coatings

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TAPPICon Virtual 2021

作者： Rao, Pradnya Tripp, Carl Bousfield, Doug Department of Chemical and Biomedical Engineering Paper Surface Science Program University of Maine

Latex is a high cost component • Need to use it effectively Prevent or reduce binder migration by attaching latex to the pigment Novel coating structures may be possible that "retain" binder with coating pig... 详细信息

ISBN: (纸本)9781713829683

关键词： Coatings

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Hydrogel derived from water hyacinth and pectin from banana peel as a membrane layer

Hydrogel derived from water hyacinth and pectin from banana ...

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3rd International Conference on chemical engineering and Applied sciences, ICChEAS 2022

作者： Elma, Muthia Kadek Devi Ananda Saraswati, Ni Fransiska Afrida Simatupang, Paskah Febriyanti, Retno Rahma, Aulia Ria Mustalifah, Fitri Chemical Engineering Department Engineering Faculty Lambung Mangkurat University Jl A. Yani Km 36 South Kalimantan Banajrbaru70714 Indonesia Magister Program of Chemical Engineering Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru70714 Indonesia Doctoral Program of Environemntal Science Postgraduate Program Lambung Mangkurat University Jl Brigjen H. Hasan Basri Kayutangi South Kalimantan Banjarmasin70123 Indonesia Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru70714 Indonesia

Hydrogels is a unique material that affordable to apply as a membranes layer. In tropical country, such as Indonesia there is easily found water hyacinth (a weed plant) which is potentially used for hydrogels materials fabrication due to high cellulose content. Carboxymethyl cellulose (CMC) from water hyacinth cellulose and banana peels pectin are used to produce hydrogel for ultrafiltration membrane. The aims of this study are to characterize the functionalization of CMC-pectin membrane with different ratio using Fourier transform infrared spectroscopy (FTIR) and to determines the morphology of its membranes structure. The CMC was synthesized from water hyacinth stems through carboxymethylation. The functionalization group of multiple CMC-pectin membrane ratio is domination with carboxyl group (COO-), carbonyl stretching and carbon group. Meanwhile, CMC-pectin 70:30 wt% ratio displays not smooth structure. There is a water hyacinth stems extracted cellulose fibre on the surface of hydrogel CMC:pectin membrane. In other hand, the addition of pectin in all ratio variation exhibit increasing contact angle number from 63.98° to 68.16° (0-30 wt% pectin). The existence of pectin from banana peels on hydrogel membranes contributes to increase hydrophobicity of hydrogel-membrane, in spite of the contact angle value is below than 90°. © 2023 Elsevier Ltd. All rights reserved.

关键词： Membranes

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CoCo-PBA/tetrabutylammonium bromide as highly efficient catalyst for CO_(2) and epoxides coupling reaction under mild conditions

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Chinese chemical Letters 2022年第2期33卷 1081-1086页

作者： Munir Ullah Khan Saﬁr Ullah Khan Jiraya Kiriratnikom Shah Zareen Xinghong Zhang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Hefei National Laboratory for Physical Science at the Microscale School of Life SciencesUniversity of Science and Technology of ChinaHefei 230027China National Synchrotron Radiation Laboratory Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei 230029China

The development of effective and low-energy-consumption catalysts for CO_(2)conversion into high-value-added products by constructing versatile active sites on the surface of heterogeneous compounds is an ur-gent and challenging *** this study,a stable and well-defined heterogeneous cobalt hexacyanocobal-tate(Co_(3)[Co(CN)_(6)]_(2)),typical cobalt Prussian blue analogue(CoCo-PBA)modified with tetrabutylammo-nium bromide(TBAB),is proven to be the superior catalyst for CO_(2)and epoxide coupling to produce cyclic carbonates with>99%yield under mild reaction conditions(1.0 MPa,65℃).Based on a series of characterizations,it is revealed that the CoCo-PBA structure can maintain relatively high thermal and chemical *** experiments exhibited that the CoCo-PBA system could retain 98%of the original activity after six reaction *** CoCo-PBA/TBAB catalytic system was also highly active for coupling CO_(2)with other industrial-grade *** results show the Co Co-PBA catalytic system potential flexibility and the generality of the catalyst preparation strategy.

关键词： CO_(2)conversion Cyclic carbonates Prussian blue analogue Heterogeneous catalysis Co_(3)[Co(CN)_(6)]_(2)

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Systematic designs of single metal compounds synthesized using ammonia fluoride-based complex as structure directing agents for energy storage

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Journal of Colloid and Interface science 2023年第PartA期652卷 294-304页

作者： Kuo, Tsung-Rong Zher Yu, You Wu, Chung-Hsien Lee, Pin-Yan Kongvarhodom, Chutima Chen, Hung-Ming Husain, Sadang Yougbaré, Sibidou Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Gingen technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan Department of Physics Faculty of Mathematics and Natural Science Lambung Mangkurat University Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou 03 Burkina Faso

Tailoring morphology and composition of metal organic frameworks (MOF) can improve energy storage by establishing high surface area, large porosity and multiple redox states. Structure directing agents (SDA) is functional of designing surface properties of electroactive materials. Ammonium fluoride has functional abilities for designing MOF derivatives with excellent energy storage abilities. Systematic design of MOF derivatives using ammonia fluoride-based complex as SDA can essentially create efficient electroactive materials. Metal species can also play significant roles on redox reactions, which are the main energy storage mechanism for battery-type electrodes. In this work, 2-methylimidazole, two novel SDAs of NH4BF4 and NH4HF2, and six metal species of Al, Mn, Co, Ni, Cu and Zn are coupled to synthesize MOF derivatives for energy storage. Metal species-dependent compositions including hydroxides, oxides, and hydroxide nitrates are observed. The nickel-based derivative (Ni-HBF) shows the highest specific capacitance (CF) of 698.0F/g at 20 mV/s, due to multiple redox states and advanced flower-like surface properties. The diffusion and capacitive-control contributions of MOF derivatives are also analyzed. The battery supercapacitor hybrid with Ni-HBF electrode shows a maximum energy density of 27.9 Wh/kg at 325 W/kg. The CF retention of 170.9% and Coulombic efficiency of 93.2% are achieved after 10,000 cycles. © 2023 Elsevier Inc.

关键词： Supercapacitor

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Sources of dissolved organic matter in initial rainwater and its photochemical activity

Water Cycle

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Water Cycle 2025年 6卷 428-439页

作者： Yanting Xi Sihan Fan Yixin Liu Danni Cui Zhicheng Liao Ziwei Guo Chaochao Lai Haodong Zhang Zhe Zhang Fengxia Han Huan He Bin Huang Xuejun Pan Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650500 China Faculty of Civil Engineering and Mechanics Kunming University of Science and Technology Kunming 650500 China Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed Kunming 650032 China Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (DCEE) University of Cincinnati OH 45221 USA

The dissolved organic matter in initial rainwater (RDOM), including soil-dissolved organic matter (SDOM) and water-soluble organic matter (WSOM) in the atmosphere, can potentially mediate the migration and transformation of contaminants in natural water. However, researches on its sources, characteristics, and impact of environmental factors are limited. This study aims to investigate the main sources of RDOM and its properties influenced by environmental factors (such as light exposure and temperature variation). The results revealed that RDOM was mainly composed of SDOM. Temperature (–5°C, −20°C, temperature alternating, 40°C, 50°C, 60°C) induced the variation of SDOM components, altering its fluorescence characteristics, aromatic components, and hydrophobicity. And high temperature showed a more pronounced effect on SDOM components. However, temperature fluctuations had different impacts on the SDOM-mediated photodegradation of bisphenol A (BPA). Among them, only SDOM that had undergone freeze-thaw cycles exhibited a promotive effect on the photodegradation of BPA, with the most significant effect observed at −20°C. Illumination (ultraviolet light (UV) and natural light (NL)) consumed the chromophoric groups of SDOM, disrupted its intricate electron transfer structure, and reduced the production of •OH and Triplet-state dissolved organic matter ( 3 DOM∗). So, illumination, especially UV, significantly weakened its mediating effect on the photodegradation of BPA. Based on these findings above, RDOM through temperature increase and illumination potentially leads to an inhibition of the degradation rate of organic pollutants. Conversely, RDOM may exhibit an enhanced ability following a freeze-thaw process. This study is crucial for elucidating the environmental effects of RDOM.

关键词： Dissolved organic matter Initial rainwater Photochemical activity Photo modification Temperature changes

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Continuous Inactivating Shiga-toxin Producing E. coli in Milk By a Liquid-phase Plasma Process

Continuous Inactivating Shiga-toxin Producing E. coli in Mil...

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2024 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2024

作者： Yuan, Yuan Sheng, Haiqing Deng, Shaobo Mohotti, Dinithi Booker, Taylor Mukhtar, Ahmad Wu, Sarah Department of Chemical and Biological Engineering University of Idaho MoscowID83844 United States Southern Research and Outreach Center University of Minnesota WasecaMN56093 United States Environmental Science Program University of Idaho MoscowID83844 United States

ISBN: (纸本)9798331302214

In this study, we demonstrate that treating milk using a continuous liquid-phase plasma (CLPD) based process is an effective solution. The effect of different system power (180 W-320 W) and flow rate (30 ml/min-70 ml/min) on the inactivation of Shiga-toxin Producing E. coli (STEC) enriched in pasteurized milk was evaluated. Pasteurized milk without STEC enrichment served as a parallel control. Experiments have shown that CLPD-treated milk exhibits a significant reduction in colony-forming units (CFU) of STEC under majority of treatment conditions based on the two significant operational factors. It has been proven that system power and liquid flow rate significantly impact continuous microbial inactivation in milk. A lower flow rate (30ml/min) and higher system power (300w) result in a notable CFU reduction (6.3 logs), while the higher flow rates with lower system power led to milder changes in STEC reduction in milk. Under strong treatment conditions, the STEC inactivation effect was consistent with low variation. Evaluation of the physicochemical properties of CLPD treated milk revealed lower resultant temperatures compared to conventional pasteurization methods. Scanning Emission Microscopy (SEM) imaging has revealed significant cell disruption of STEC by CLPD processing. These findings offer practical insights into cold plasma treatment of milk, suggesting it as a potential alternative to conventional pasteurization methods. © 2024 ASABE Annual International Meeting. All rights reserved.

关键词： Escherichia coli

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Effect of SiO2 Content on Photocatalytic Activities of ZnO/Ag/SiO2 Nanocomposites Prepared by Spray Pyrolysis 3

Effect of SiO2 Content on Photocatalytic Activities of ZnO/A...

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3rd International Conference and Exhibition on Powder Technology 2021, ICePTi 2021

作者： Riwayati, I. Winardi, S. Madhania, S. Machmudah, S. Shimada, M. Kusdianto, K. Chemical Engineering Department Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia Chemical Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University 4-1 Kagamiyama 1-chome Higashi-Hiroshima Hiroshima739-8527 Japan

Spray pyrolysis is a method for preparing nanocomposite materials in the gas phase. Due to the ease with which the temperature in the furnace can be controlled, this method can produce more uniform nanoparticle sizes. This method can be used to synthesize ZnO nanoparticles. Additionally, due to the photocatalytic properties of the synthesized particles, they are used to decompose synthetic dye waste. Due to electron-hole recombination, ZnO's photocatalytic properties are limited. A doping process with various metals was used to enhance the photocatalytic properties of ZnO nanoparticles. Ag is one of these metals. The addition of Ag metal to ZnO nanoparticles results in the formation of nanocomposites with preferable photocatalytic properties. However, the addition of Ag results in the aggregation of the obtained particles. As a result, the ZnO particles must be trapped in a matrix (for example, SiO2) to inhibit particle growth. This research aims to determine the effect of the SiO2 composition on the characteristics and photocatalytic properties of ZnO/Ag/SiO2 nanocomposite synthesized via spray pyrolysis. SEM (Scanning Electron Microscope) analysis was used to determine the morphology of the nanocomposites, XRD (X-ray Diffraction) analysis was used to determine the purity and degree of crystallization, FTIR (Fourier-transform Infrared) analysis was used to determine the functional groups, and UV-Vis Spectrophotometer analysis was used to determine the photocatalytic characteristics. According to the analysis results, the optimal photocatalytic activity was obtained at 1% SiO2, with a degradation rate of up to 47% of methylene blue and a rate constant (k) of 0.0086 L/min under UV light irradiation. © 2011 Institute of Physics Publishing. All rights reserved.

关键词： ZnO nanoparticles

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MOF-Derived Bimetal-Embedded Carbon with Etched Morphologies as an Efficient Activator of Peroxymonosulfate for Eliminate Emerging Contaminants

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Korean Journal of chemical engineering 2024年第6期41卷 1815-1831页

作者： Chen, Yi-Chun Jiang, Xin-Yu Lin, Jia-Yin Thanh, Bui Xuan Wang, Haitao Huang, Chao-Wei Ghotekar, Suresh Huang, Chih-Feng Lin, Kun-Yi Andrew Department of Biotechnology National Formosa University Yunlin63208 Taiwan Department of Environmental Engineering & amp Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung Taiwan Semiconductor and Green Technology Program National Chung Hsing University 250 Kuo-Kuang Road Taichung Taiwan Ho Chi Minh City Viet Nam Ho Chi Minh City700000 Viet Nam Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University Tianjin300071 China Department of Engineering Science National Cheng Kung University Tainan70101 Taiwan Centre for Herbal Pharmacology and Environmental Sustainability Chettinad Hospital and Research Institute Chettinad Academy of Research and Education Kelambakkam Tamil Nadu Chennai603103 India Department of Chemical Engineering National Chung Hsing University Taichung Taiwan Institute of Analytical and Environmental Sciences National Tsing Hua University Hsinchu Taiwan Department of Civil Engineering National Taipei University of Technology Taipei City Taiwan

As bis(4-hydroxyphenyl)methanone (BHP) is one of the most common UV light stabilizers (UVLS), but exhibits endocrine disrupting toxicity, this study aims to develop useful sulfate radical-based techniques to eliminate BHP from water by activating peroxymonosulfate (PMS). Hence, while cobalt (Co) exhibits efficacy as a transition metal for the activation of PMS, the utilization of manganese/cobalt (Mn/Co) bimetallic oxides presents an even more encouraging prospect as heterogeneous catalysts for PMS activation. In this study, we have successfully produced N-doped carbon-supported Mn/Co nanoparticles (NCMC) with a distinctive hollow-engineered nanostructure. The synthesis involved the utilization of Co-MOF as a precursor, followed by easy etching and Mn doping to achieve the desired composition of Mn/Co bimetallic oxide nanoparticles. The inclusion of Mn dopant facilitates the integration of Mn/Co nanoparticles into the hollow-structured N-doped carbon matrix. NCMC demonstrates much higher activity compared to NCC and the benchmark catalyst, Co3O4 NP, in terms of PMS activation for the degradation of BHP. The findings of the eco-toxicity study indicate that the degradation of BHP by NCMC + PMS does not yield hazardous or extremely toxic byproducts, so establishing NCMC as a potentially effective heterogeneous catalyst for activating PMS in the degradation of BHP. © The Author(s), under exclusive licence to Korean Institute of chemical Engineers, Seoul, Korea 2024.

关键词： Transition metals

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