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Effect of pyrolysis temperature on characteristics of tunable magnetic biochar synthesized from watermelon rind and its tetracycline adsorption performance

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Thairattananon, Phisit Le, Giang T.T. Matsumura, Yukihiko Wu, Kevin C.W. Charinpanitkul, Tawatchai Department of Chemical Engineering Faculty of Engineering Center of Excellence in Particle and Material Processing Technology Chulalongkorn University Bangkok10330 Thailand Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh700000 Viet Nam Faculty of Environmental and Chemical Engineering Duy Tan University Da Nang550000 Viet Nam Mechanical Engineering Program Graduate School of Advanced Science and Engineering Kagamiyama Hiroshima Higashi-Hiroshima739-8527 Japan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan Taiwan Research Network of NANOTEC-KU on Nanocatalyst and Nanomaterials for Sustainable Energy and Environment Bangkok10900 Thailand

Background: Tetracycline is an emerging contaminant in water reservoirs, causing undesirable influences on human society. The promising usage of magnetic biochar (MBC) derived from watermelon rind has been explored in the adsorption of various contaminants owing to its high specific surface area and separability;however, the temperature-dependent changes of MBC and its sorption ability toward antibiotics have not been widely examined. Method: Tunable MBCs could be synthesized via simple pyrolysis of watermelon rind impregnated with FeCl3 at different temperatures (700–900 °C). The as-synthesized MBCs were characterized using scanning electron microscopy (SEM), an elemental analyzer, N2 adsorption/desorption, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffractometry (XRD), and vibrating sample magnetometry (VSM). Then Tetracycline, an emerging contaminant in water reservoirs, was employed as the target contaminant, while adsorption kinetics, isotherm, the effect of pH, and reusability were investigated. Significant findings: The tunability of as-synthesized MBCs could be observed by their distinct changes in structural characteristics when varying pyrolysis temperature. MBC synthesized at 900 °C (MBC900) possessed a high-specific surface area (401 m2.g−1) and saturation magnetization (55.29 emu.g−1), resulting in a greater amount of sorption sites. Tetracycline adsorption by MBCs followed a pseudo-second-order kinetic model and fitted well with the Freundlich model. MBC900 is an excellent adsorbent with a maximum adsorption capacity of 77.6 mg.g−1 and could be used for at least five cycles with an insignificant decrease in the adsorption capacity. © 2024 Taiwan Institute of Chemical Engineers

关键词： Adsorption

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Pressure-driven homogenization of lithium disilicate glasses

arXiv

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arXiv 2023年

作者： Bakhouch, Yasser Buchner, Silvio Silveira, Rafael Abel Resende, Leonardo Pereira, Altair Soria Hasnaoui, Abdellatif Atila, Achraf LS2ME Faculté Polydisciplinaire Khouribga Sultan Moulay Slimane University of Beni Mellal B.P 145 Khouribga25000 Morocco Graduate Program in Materials Science Federal University of Rio Grande do Sul Porto Alegre Brazil Department of Material Science and Engineering Saarland University Saarbrücken66123 Germany

Lithium disilicate glasses and glass-ceramics are good potential candidates for biomedical applications and solid-state batteries, and serve as models of nucleation and crystal growth. Moreover, these glasses exhibit a phase separation that influences their nucleation and crystallization behavior. The atomistic mechanisms of the phase separation and their pressure dependence are unclear so far. Here, we used molecular dynamics simulations supported by experiments to assess the spatial heterogeneity of lithium disilicate glasses prepared under pressure. We show that the glass heterogeneity decreases with increasing the cooling pressure and almost disappears at pressures around 30 GPa. The origin of the heterogeneity is due to the attraction between Li cations to form clustering channels, which decreases with pressure. Through our results, we hope to provide valuable insights and guidance for making glass-ceramics with controlled crystallization. Copyright © 2023, The Authors. All rights reserved.

关键词： Phase separation

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Preparation of a New Hybrid Mgalldh@Magnetite Activated Charcoal by Hydrothermal Method for Stability and Adsorption Mechanism of Congo Red

SSRN

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SSRN 2024年

作者： Ahmad, Nur Kameda, Tomohito Rahman, Mir Tamzid Rahman, Farzana Lesbani, Aldes Graduate School of Mathematics and Natural Science FMIPA Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia Research Center of Inorganic Materials and Complexes Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia Graduate School of Environmental Studies Tohoku University 6-6-20 Aoba Aramaki Aobaku Sendai980-8579 Japan Department of Chemistry Jahangirnagar University Dhaka Savar1342 Bangladesh Department of Nutrition and Food Engineering Daffodil International University Birulia1216 Bangladesh Master Program of Material Science Graduate School of Universitas Sriwijaya Sumatera Selatan Palembang30139 Indonesia

Background The removal of hazardous dyes from water by magnetic adsorbents has received significant interest due to their low cost and ease of separation from the solution phase. This study explores the efficacy of a novel hybrid adsorbent, magnetite and activated charcoal-modified MgAl layered double hydroxide (MgAlLDH@MAC), for removing congo red (CR) from aqueous solutions. Methods MgAlLDH@MAC was successfully prepared via a co-precipitation to hydrothermal method and characterized using FE-SEM, FE-STEM, VSM, BET, XRD, FTIR, XPS, and HPLC analysis. Significant findings The incorporation of magnetite and activated charcoal was successful, resulting in excellent adsorption performance for CR and easy separation from the solution due to its magnetic properties. The adsorbent achieved a maximum adsorption capacity of 625 mg/g, which is in line with the Langmuir isotherm and pseudo-second-order kinetic model. Moreover, the adsorbent demonstrated excellent stability and reusability, retaining 91.78% efficiency after five adsorption-desorption. This study offers a fresh viewpoint on creating high-performance LDH adsorbents that remove dyes quickly and effectively using carbon and magnetite materials. © 2024, The Authors. All rights reserved.

关键词： Magnetite

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Integrated application of grafted ZnO and fungicide to control the fungicide-resistant Colletotrichum spp

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Journal of the Taiwan Institute of Chemical Engineers 2024年 155卷

作者： Chang, Tao-Ho Chen, Yi-Chi Lai, Yu-Fang Wu, Tzu-Chien Lai, Chian-Hui Hsueh, Han-Yu Chang, Pi-Fang Linda Program in Plant Health Care Academy of Circular Economy National Chung Hsing University Nantou540216 Taiwan Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung402202 Taiwan Master Program for Plant Medicine and Good Agricultural Practice National Chung Hsing University Taichung402202 Taiwan Department of Material Science & Engineering National Chung Hsing University Taichung402202 Taiwan Graduate Institute of Biomedical Engineering National Chung Hsing University Taichung402202 Taiwan Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung807378 Taiwan Department of Plant Pathology National Chung Hsing University 402202 Taiwan

Background: The Food and Agriculture Organization has reported approximately 40 % of food loss due to damage from plant pests and diseases, including fungal infections. Continuous application of agrichemicals for controlling fungal infection cause the occurrence of fungicide resistance. Colletotrichum spp., major causal agents for strawberry anthracnose, have gained concern for fungicide resistance issues. Methods: We developed novel antifungal strategies in the present study by integrating multibranched flower-like ZnO (fZnO) and agrochemicals (trifloxystrobin). fZnO compounds were synthesised using an eco-friendly and efficient hydrothermal method. Charged polymers with steric structures, such as hydrophilic polyacrylic acid (PAA) and polyethyleneimine (PEI), were grafted onto fZnO surfaces to improve the suspension ability of the compounds. We used the grafted fZnO compounds in combination with the fungicide trifloxystrobin to evaluate the in vitro and in vivo activities. Significant findings: Grafted fZnO (80 ppm) and trifloxystrobin (100 ppm) effectively inhibited the growth of fungicide-resistant Colletotrichum spp. and limited strawberry anthracnose on leaves. PEI-grafted fZnO shows promise as an eco-friendly additive in sustainable agriculture due to its photocatalytic activity and ability to withstand environmental factors. © 2023

关键词： Zinc oxide

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SCUBE2 regulates adherens junction dynamics and vascular barrier function during inflammation

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Cardiovascular Research 2024年第13期120卷 1636-1649页

作者： Lin, Yuh-Charn Chang, Ya-Jen Gau, Shiang-Shin Lo, Chun-Min Yang, Ruey-Bing Department of Physiology School of Medicine College of Medicine Taipei Medical University Taipei 110301 Taiwan Institute of Biomedical Sciences Academia Sinica 128 Academia Rd. Sec. 2 Taipei 115201 Taiwan Graduate School of Biostudies Kyoto University Kyoto 6068501 Japan Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Kyoto University Kyoto 6068501 Japan Department of Biomedical Engineering National Yang Ming Chiao Tung University Taipei 112304 Taiwan Biomedical Translation Research Center Academia Sinica 99 Ln. 130 Academia Rd. Sec. 1 Taipei 115201 Taiwan Ph.D. Program in Drug Discovery and Development Industry College of Pharmacy Taipei Medical University 250 Wuxing St. Taipei 110301 Taiwan

Aims: SCUBE2 (signal peptide-CUB-epidermal growth factor-like domain-containing protein 2) is a secreted or membrane-bound protein originally identified from endothelial cells (ECs). Our previous work showed that SCUBE2 forms a complex with E-cadherin and stabilizes epithelial adherens junctions (AJs) to promote epithelial phenotypes. However, it remains unclear whether SCUBE2 also interacts with vascular endothelial (VE)-cadherin and modulates EC barrier function. In this study, we investigated whether and how SCUBE2 in ECs regulates vascular barrier maintenance. Methods and results: We showed that SCUBE2 colocalized and interacted with VE-cadherin and VE-protein tyrosine phosphatase (VE-PTP) within EC AJs. Furthermore, SCUBE2 knockdown disrupted EC AJs and increased EC permeability. Expression of EC SCUBE2 was suppressed at both mRNA and protein levels via the nuclear factor-κB signalling pathway in response to pro-inflammatory cytokines or permeability-inducing agents. In line with these findings, EC-specific deletion of Scube2 (EC-KO) in mice impaired baseline barrier function and worsened vascular leakiness of peripheral capillaries after local injection of histamine or vascular endothelial growth factor. EC-KO mice were also sensitive to pulmonary vascular hyperpermeability and leucocyte infiltration in response to acute endotoxin- or influenza virus-induced systemic inflammation. Meanwhile, EC-specific SCUBE2-overexpressing mice were protected from these effects. Molecular studies suggested that SCUBE2 acts as a scaffold molecule enabling VE-PTP to dephosphorylate VE-cadherin, which prevents VE-cadherin internalization and stabilizes EC AJs. As such, loss of SCUBE2 resulted in hyperphosphorylation of VE-cadherin at tyrosine 685, which led to its endocytosis, thus destabilizing EC AJs and reducing barrier function. All of these effects were exacerbated by inflammatory insults. Conclusion: We found that SCUBE2 contributes to vascular integrity by recruiting VE-

关键词： Adherens junctions SCUBE2 Vascular permeability VE-cadherin VE-PTP

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No external load measurement strategy for micro thermoelectric generator based on high-performance Si_(1-x-y)Ge_(x)Sn_(y) film

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Journal of Materiomics 2021年第4期7卷 665-671页

作者： Ying Peng Sijing Zhu Huajun Lai Jie Gao Masashi Kurosawa Osamu Nakatsuka Sakae Tanemura Biaolin Peng Lei Miao Guangxi Key Laboratory of Information Material School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin541004China Department of Materials Physics Graduate School of EngineeringNagoya UniversityNagoya464-8603Japan PRESTO Japan Science and Technology Agency4-1-8HonchoKawaguchiSaitama332-0012Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya464-8601Japan Japan Fine Ceramics Center 2-4-1 MutsunoAtsuta-kuNagoya456-8587Japan Center on Nanoenergy Research Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured MaterialsGuangxi Key Laboratory for Relativity AstrophysicsNanning530004China Department of Materials Science and Engineering SIT Research LaboratoriesInnovative Global ProgramFaculty of EngineeringShibaura Institute of TechnologyTokyo135-8548Japan

In this study,a micro in-plane p-type thermoelectric generator(TEG),which consists of thin-film Si_(1-x-y)Ge_(x)Sn_(y) ternary alloy semiconductor on insulator,is developed to make efficient use of waste heat such as human body.A power factor value as high as 1095 mWm^(-1) K^(-2) had been achieved using Bion implanted and short-term rapid thermal annealing(RTA)*** addition,a measuring scheme for micro TEG without external load resistance was *** one measuring session,multiple parameters can be *** micro single-arm TEG prepared by semiconductor process can output 0.29 nW power at a temperature difference of 15 K,and a cross-sectional power density has reached up to 0.58 mW/cm^(2),which is a superior value for wearable *** findings of this study have important reference value for wearable device performance improvement and output power measuring of micro TEG.

关键词： Si_(1-x-y)Ge_(x)Sn_(y) film P-type TEG No external load measurement Ambient power density

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Full-Duplex Beamforming in the Sub-Terahertz Regime

Full-Duplex Beamforming in the Sub-Terahertz Regime

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International Conference on Infrared and Millimeter Waves

作者： Subhajit Karmakar Atsutse Kludze Jacques Doumani Andrey Baydin Junichiro Kono Yasaman Ghasempour Department of Electrical and Computer Engineering Princeton University Princeton NJ USA Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Smalley-Curl Institute Rice University Houston TX USA Department of Physics and Astronomy Rice University Houston TX USA Department of Material Science and NanoEngineering Rice University Houston TX USA

We propose a novel architecture that realizes full-duplex directional beamforming in the sub-terahertz regime. Our architecture leverages the frequency-controlled beam steering of leaky-wave antenna together with the polarization-dependent response of aligned single-wall carbon nanotubes. We evaluate the performance of this architecture via preliminary experiments.

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Active tuning of plasmon damping via light induced magnetism

arXiv

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arXiv 2022年

作者： Cheng, Oscar Hsu-Cheng Zhao, Boqin Brawley, Zachary Son, Dong Hee Sheldon, Matthew Department of Chemistry Texas A&M University College Station TX United States Center for Nanomedicine Institute for Basic Science Graduate Program of Nano Biomedical Engineering Advanced Science Institute Yonsei University Seoul Korea Republic of Department of Material Science and Engineering Texas A&M University College Station TX United States

Circularly polarized optical excitation of plasmonic nanostructures causes coherent circulating motion of their electrons, which in turn, gives rise to strong optically induced magnetization— a phenomenon known as the inverse Faraday effect (IFE). In this study we report how the IFE also significantly decreases plasmon damping. By modulating the optical polarization state incident on achiral plasmonic nanostructures from linear to circular, we observe reversible increases of reflectance by 78% as well as simultaneous increases of optical field concentration by 35.7% under 109 W/m2 continuous wave (CW) optical excitation. These signatures of decreased plasmon damping were also monitored in the presence of an externally applied magnetic field (0.2 T). The combined interactions allow an estimate of the light-induced magnetization, which corresponds to an effective magnetic field of ~1.3 T during circularly polarized CW excitation (109 W/m2). We rationalize the observed decreases in plasmon damping in terms of the Lorentz forces acting on the circulating electron trajectories. Our results outline strategies for actively modulating intrinsic losses in the metal, and thereby, the optical mode quality and field concentration via opto-magnetic effects encoded in the polarization state of incident light. Copyright © 2022, The Authors. All rights reserved.

关键词： Damping

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Ultrastrong Spin-Photon Coupling in Gadolinium Gallium Garnet

Ultrastrong Spin-Photon Coupling in Gadolinium Gallium Garne...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Kritzell, T. Elijah Bao, Junzhe Doumani, Jacques Lee, Jae Joon Xu, Hongjing Tay, Fuyang Nojiri, Hiroyuki Bamba, Motoaki Baydin, Andrey Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Institute for Materials Research Tohoku University Sendai980-8577 Japan The Hakubi Center for Advanced Research Kyoto University Kyoto606-8502 Japan Department of Physics I Kyoto University Kyoto606-8502 Japan Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Material Science and NanoEngineering Rice University HoustonTX77005 United States

We examine ultrastrong coupling of an ensemble of paramagnetic spins in Gd3Ga5O12 with terahertz photons in the presence of a high external magnetic field both in the bulk and thin-film limits. © 2023 The Author(s)

ISBN: (纸本)9781957171258

关键词： Photons

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Unravelling Exothermic Reaction Dynamics in Polyurethane Polymerization: A Thermo-Kinetic Simulation Approach

SSRN

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SSRN 2023年

作者： Mendija, Leanne Christie C. Dingcong, Roger G. Alfeche, Fortia Louise Adeliene M. Al-Moameri, Harith H. Dumancas, Gerard G. Malaluan, Roberto M. Alguno, Arnold C. Lubguban, Arnold A. Center for Sustainable Polymers Mindanao State University Iligan Institute of Technology Iligan City9200 Philippines Material Science and Engineering Program Graduate School of Engineering Mindanao State University Iligan Institute of Technology Iligan City9200 Philippines Department of Materials Engineering Mustansiriyah University Baghdad10052 Iraq Department of Chemistry The University of Scranton ScrantonPA18510 United States Department of Chemical Engineering and Technology Mindanao State University Iligan Institute of Technology Iligan City9200 Philippines Department of Physics Mindanao State University Iligan Institute of Technology Iligan City9200 Philippines

The pursuit of sustainable polyurethane product development necessitates a profound understanding of precursor materials, particularly polyol since polyurethane properties are heavily influenced by the type of polyol employed during polyurethane production. While traditional polyurethanes are solely derived from hydroxyl functionalized polyols, the emergence of amine-hydroxyl hybrid polyols has garnered significant attention due to their potential for enhancing polyurethane product properties. These hybrid polyols are characterized by the presence of both amine and hydroxyl functional groups. However, characterizing these polyols remains a daunting challenge due to the lack of established experimental testing standards for properties, such as fractional hydroxyl and amine moieties, and thermo-kinetic parameters for amine reactions with isocyanates. To bridge these gaps, this study employed a computational simulation approach to determine the fractions of moieties in both traditional and hybrid polyols. Additionally, this study determined the thermo-kinetic parameters for exothermic isocyanate reactions with amine moieties in hybrid polyols. The computational method integrated energy balance and reaction kinetics analysis for various polyols to elucidate the influence of functional moieties on the thermo-kinetic behavior of polyurethane formations. Validation of the simulated results was conducted by comparing their experimental and simulated gel and foam temperature profiles, highlighting the direct influence of fractional moieties on polyurethane formations. The comparisons revealed an average relative error of less than 5%, indicating the accuracy and credibility of the simulation. Thus, this study represents a pivotal opportunity for advancing knowledge and driving sustainable developments in biobased polyol characterization for polyurethane production streamlining and formulation optimization. © 2023, The Authors. All rights reserved.

关键词： Polymerization

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