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SSRN 2024年

作者： Pei, Wenkai Zheng, Yifan Gao, Jianyu Lei, Juying Liu, Yongdi Zhou, Liang Zhang, Jinlong Wang, Yu National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization Key Laboratory for Advanced Materials Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China Department of Molecular Engineering Graduate School of Engineering Kyoto University Kyoto-Daigaku Katsura Nishikyo-ku Kyoto615-8510 Japan State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Roxarsone (ROX) is the main form of As pollution in the world, and developing effective methods for its elimination is beneficial to human health and ecological environment. Herein, we report glutaraldehyde-crosslinked chitosan encapsulated CoCe-LDH as an outstanding catalyst for the advanced oxidation of ROX and the efficient adsorption of inorganic arsenic. 100% of ROX and more than 98.5% of As(III)/As(V) were eliminated, and over 99.3% of remained inorganic arsenic was oxidized to low toxicity As(V) in the PMS-activation system, and some specific properties of LDH are considered the main reasons. The hierarchical anion exchange has been confirmed to be beneficial for constructing a high concentration PMS inter layer microenvironment. And the unique reverse electron transfer process induced the 100% selective production of singlet oxygen. This work not only develops an advanced ROX removal method, but also provides a new understanding of LDH-based advanced oxidation process. © 2024, The Authors. All rights reserved.

关键词： chemical activation

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Bioethanol Production from Microalgae Biomass at High Solid Loadings

SSRN

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SSRN 2022年

作者： Condor, Billriz E. de Luna, Mark Daniel G. Chang, Yu-Han Chen, Jih-Heng Leong, Yoong Kit Chen, Po-Ting Chen, Chun-Yen Lee, Duu-Jong Chang, Jo-Shu Energy Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City1101 Philippines Department of Chemical Engineering College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines Department of Chemical Engineering National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung Taiwan Department of Biotechnology and Food Technology Southern Taiwan University of Science and Technology Tainan71005 Taiwan University Center for Bioscience and Biotechnology National Cheng Kung University Tainan701 Taiwan Department of Mechanical Engineering City University of Hong Kong Kowloon Tang Hong Kong Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li32003 Taiwan

Industrial adoption of microalgae biofuel technology has always been hindered by its economic viability. To increase the feasibility of bioethanol production from microalgae, fermentation was applied to Chlorella vulgaris FSP-E biomass at high-solid-loading conditions. First, Chlorella vulgaris FSP-E was cultivated to produce microalgae biomass with high carbohydrate content. Next, different ethanol-producing microorganisms were screened. Saccharomyces cerevisiae FAY-1 showed no inhibition when fermenting high initial glucose concentrations and was selected for the fermentation experiments at high solids loading. Optimization of acid hydrolysis at high biomass loading was also performed. The fermentation of microalgal biomass hydrolysate produced a final ethanol concentration and yield higher than most reported literature using microalgae feedstock. In addition, the kinetics of bioethanol fermentation of microalgae hydrolysate under high solid loading were evaluated. These results show the potential of fermenting microalgae biomass at high solids loading in improving the viability of microalgae bioethanol production. © 2022, The Authors. All rights reserved.

关键词： Microalgae

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Tailoring molecular Interaction in Heteronetwork Polymer Electrolytes for Stretchable, High-Voltage Fiber Supercapacitors

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SSRN 2022年

作者： Handayani, Puji Lestari Kim, Taehoon Song, Yeon Hwa Park, Jae Seo Yang, Seung Jae Choi, U. Hyeok Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Changwon51508 Korea Republic of Department of Polymer Engineering Pukyong National University Busan48513 Korea Republic of Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy and Materials Inha University Incheon22212 Korea Republic of

Mechanically and electrochemically stable all-solid-state supercapacitors are of great interest in the field of wearable and portable electronic devices. However, when conventional liquid or gel electrolytes are used in supercapacitors, their discontinuous functions appear in harsh external environments. Here, we prepare freeze-tolerant heteronetwork nanohybrid polymer electrolytes (NPEs), composed of hydrophilic poly(lithium acrylate) (PLiA) containing mobile lithium countercations and mechanically robust silica nanoparticles (SNs) serving as stress buffers, via sol-gel reaction and radical polymerization. The combination of PLiA and SN provides NPE (PLiA-SN) with high room temperature ionic conductivity, remaining 100% even after 700% elongation, as well as exhibiting high ionic conductivity at low temperatures. The cross-linking of SNs with PLiA also gives the resultant NPE superelasticity and self-healing property. The optimized NPE is assembled with metal-organic framework derived carbon-coated CNTY hybrid electrodes to fabricate high-performance all-solid-state fiber supercapacitors (FSCs). The assembled FSC delivers a high specific capacitance, high power and energy densities, as well as a wide operating voltage window. Moreover, the electrochemical performance of the FSC is maintained under varying stretching strains and degrees of bending, and still retains capacity even at a low temperature, demonstrating excellent mechanical, thermal, and electrochemical stability. © 2022, The Authors. All rights reserved.

关键词： Supercapacitor

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Coherent Erbium Spin Defects in Colloidal Nanocrystal Hosts

arXiv

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arXiv 2024年

作者： Wong, Joeson Onizhuk, Mykyta Nagura, Jonah Thind, Arashdeep S. Bindra, Jasleen K. Wicker, Christina Grant, Gregory D. Zhang, Yuxuan Niklas, Jens Poluektov, Oleg G. Klie, Robert F. Zhang, Jiefei Galli, Giulia Heremans, F. Joseph Awschalom, David D. Alivisatos, A. Paul James Franck Institute University of Chicago ChicagoIL60637 United States Department of Chemistry University of Chicago ChicagoIL60637 United States Materials Science Division Argonne National Laboratory LemontIL60439 United States Pritzker School of Molecular Engineering University of Chicago ChicagoIL60637 United States Department of Physics University of Illinois Chicago ChicagoIL60607 United States Chemical Sciences and Engineering Division Argonne National Laboratory LemontIL60439 United States Center for Molecular Engineering Argonne National Laboratory LemontIL60439 United States

We demonstrate nearly a microsecond of spin coherence in Er3+ ions doped in cerium dioxide nanocrystal hosts, despite a large gyromagnetic ratio and nanometric proximity of the spin defect to the nanocrystal surface. The long spin coherence is enabled by reducing the dopant density below the instantaneous diffusion limit in a nuclear spin-free host material, reaching the limit of a single erbium spin defect per nanocrystal. We observe a large Orbach energy in a highly symmetric cubic site, further protecting the coherence in a qubit that would otherwise rapidly decohere. Spatially correlated electron spectroscopy measurements reveal the presence of Ce3+ at the nanocrystal surface that likely acts as extraneous paramagnetic spin noise. Even with these factors, defect-embedded nanocrystal hosts show tremendous promise for quantum sensing and quantum communication applications, with multiple avenues, including core-shell fabrication, redox tuning of oxygen vacancies, and organic surfactant modification, available to further enhance their spin coherence and functionality in the future. © 2024, CC BY.

关键词： Erbium

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Mathematical modelling and optimization of parameters for Al-Si-Fe aluminum alloy reinforced by Al 2 O 3 and graphite particles using Taguchi method

引用

materials Today: Proceedings 2021年 44卷 979-986页

作者： Robale Dinsa Daba Devendra Kumar Sinha Habtamu Beri Satyam Shivam Gautam Gulam Mohammed Sayeed Ahmed Ram Sewak Singh Program of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering ASTU ADAMA Ethiopia Department of Mechanical Engineering North Eastern Regional Institute of Science and Technology Itanagar India Department of Electronics and Communication School of Electrical Engineering and Computing ASTU ADAMA Ethiopia

In the present scenario the aluminum and its alloys are preferred due to requirement of lightweight high strength material. The present research article interrogates experimentally the study of actual density and porosity using powder metallurgy method. The experimental design is done using Taguchi L 16 orthogonal array. Actual density and porosity has been analyzed based on ‘smaller is best’ basis. Actual density and porosity are calculated using Archimedes principle. The leverage of four levels and five process parameters such as weight percentage of Al 2 O 3 , weight percentage of graphite, compaction pressure, compaction time and milling time are considered. Results reveal that Al 2 O 3 weight percentage has the highest leverage on density followed by compaction time and graphite weight percentage.

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Imaging 3D Chemistry at 1 nm Resolution with Fused Multi-Modal Electron Tomography

arXiv

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arXiv 2023年

作者： Schwartz, Jonathan Di, Zichao Wendy Jiang, Yi Manassa, Jason Pietryga, Jacob Qian, Yiwen Cho, Min Gee Rowell, Jonathan L. Zheng, Huihuo Robinson, Richard D. Gu, Junsi Kirilin, Alexey Rozeveld, Steve Ercius, Peter Fessler, Jeffrey A. Xu, Ting Scott, Mary Hovden, Robert Department of Materials Science and Engineering University of Michigan Ann ArborMI United States Mathematics and Computer Science Division Argonne National Laboratory LemontIL United States Advanced Photon Source Facility Argonne National Laboratory LemontIL United States Department of Material Science and Engineering Northwestern University EvanstonIL United States Department of Materials Science and Engineering University of California at Berkeley BerkeleyCA United States Department of Chemistry and Chemical Biology Cornell University IthacaNY United States Argonne Leadership Computing Facility Argonne National Laboratory LemontIL United States Department of Material Science and Engineering Cornell University IthacaNY United States Kavli Institute at Cornell for Nanoscale Science Cornell University IthacaNY United States Dow Chemical Co. MidlandMI United States National Center for Electron Microscopy Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyCA United States Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI United States Materials Science Division Lawrence Berkeley National Laboratory BerkeleyCA United States Applied Physics Program University of Michigan Ann ArborMI United States

Measuring the three-dimensional (3D) distribution of chemistry in nanoscale matter is a longstanding challenge for metrological science. The inelastic scattering events required for 3D chemical imaging are too rare, requiring high beam exposure that destroys the specimen before an experiment completes. Even larger doses are required to achieve high resolution. Thus, chemical mapping in 3D has been unachievable except at lower resolution with the most radiation-hard materials. Here, high-resolution 3D chemical imaging is achieved near or below one nanometer resolution in a Au-Fe3O4 metamaterial, Co3O4 - Mn3O4 core-shell nanocrystals, and ZnS-Cu0.64S0.36 nanomaterial using fused multi-modal electron tomography. Multi-modal data fusion enables high-resolution chemical tomography often with 99% less dose by linking information encoded within both elastic (HAADF) and inelastic (EDX / EELS) signals. Now sub-nanometer 3D resolution of chemistry is measurable for a broad class of geometrically and compositionally complex materials. © 2023, CC BY.

关键词： Zinc sulfide

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Brachiation of a polymer chain in the presence of a dynamic network

引用

Physical Review E 2020年第2期102卷 020501(R)-020501(R)页

作者： Pamela C. Cai Brad A. Krajina Andrew J. Spakowitz Department of Chemical Engineering Stanford University Stanford California 94305 USA Department of Materials Science Stanford University Stanford California 94305 USA Department of Applied Physics Stanford University Stanford California 94305 USA Biophysics Program Stanford University Stanford California 94305 USA

The viscoelastic behavior of a physically crosslinked gel involves a spectrum of molecular relaxation processes, which at the single-chain level involve the chain undergoing transient hand-to-hand motion through the network. We develop a self-consistent theory for describing transiently associating polymer solutions that captures these complex dynamics. A single polymer chain transiently binds to a viscoelastic background that represents the polymer network formed by surrounding polymer chains. The viscoelastic background is described in the equation of motion as a memory kernel, which is self-consistently determined based on the predicted rheological behavior from the chain itself. The solution to the memory kernel is translated into rheological predictions of the complex modulus over a wide range of frequencies to capture the time-dependent behavior of a physical gel. Using the loss tangent predictions, a phase diagram is shown for the sol-gel transition of polymers with dynamic association affinities. This theory provides a predictive, molecular-level framework for the design of associating gels and supramolecular assemblies with targeted rheological properties.

关键词： Polymer gels Rheological properties Viscoelasticity Polymer theory

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Full Crystallographic Imaging of Hexagonal Boron Nitride Monolayers with Phonon-Enhanced Sum-Frequency Microscopy

arXiv

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arXiv 2025年

作者： Mueller, Niclas S. Fellows, Alexander P. John, Ben Naclerio, Andrew E. Carbogno, Christian Gharagozloo-Hubmann, Katayoun Baláž, Damián Kowalski, Ryan A. Heenen, Hendrik H. Scheurer, Christoph Reuter, Karsten Caldwell, Joshua D. Wolf, Martin Kidambi, Piran R. Thämer, Martin Paarmann, Alexander Department of Physical Chemistry Fritz-Haber-Institute of the Max-Planck-Society Berlin14195 Germany Department of Chemical and Biomolecular Engineering Vanderbilt University NashvilleTN37235 United States Theory Department Fritz-Haber-Institute of the Max-Planck-Society Berlin14195 Germany Department of Physics Freie Universität Berlin Berlin14195 Germany Department of Mechanical Engineering Vanderbilt University NashvilleTN37235 United States Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37235 United States

Hexagonal boron nitride (hBN) is an important 2D material for van der Waals heterostructures, single photon emitters, and infrared nanophotonics. The optical characterization of mono- and few-layer samples of hBN however remains a challenge as the material is almost invisible optically. Here we introduce phase-resolved sum-frequency microscopy as a technique for imaging monolayers of hBN grown by chemical vapor deposition (CVD) and visualize their crystal orientation. A combination of femtosecond mid-infrared (IR) and visible laser pulses is used for sum-frequency generation (SFG), which is imaged in a wide-field optical microscope. The IR laser resonantly excites a phonon of hBN that leads to an ~800-fold enhancement of the SFG intensity, making it possible to image large 100x100 µm2 sample areas in less than 1 s. Implementing heterodyne detection in combination with azimuthal rotation of the sample further provides full crystallographic information. Through combined knowledge of topography and crystal orientation, we find that triangular domains of CVD-grown monolayer hBN have nitrogen-terminated zigzag edges. Overall, SFG microscopy can be used as an ultra-sensitive tool to image crystal structure, strain, stacking sequences, and twist angles, and is applicable to the wide range of van der Waals structures, where location and identification of monolayer regions and interfaces with broken inversion symmetry is of paramount importance. © 2025, CC BY.

关键词： Van der Waals forces

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Highly Thin Film with Aerosol-Deposited Perovskite Quantum Dot/Metal Oxide Composite for Perfect Color Conversion and Luminance Enhancement

SSRN

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SSRN 2022年

作者： Kim, Sang-Wook Kim, Sunghoon Kang, Seokwoo Baek, Seungmin Song, Jinouk Mun, Na-Eun Kwon, Hyukmin Pu, Yong-Jin Lee, Tae-Woo Yoo, Seunghyup Oh, Jong-Min Park, Jongwook Department of Applied Chemistry · Food Science and Technology Dong-Eui University Busan47340 Korea Republic of Integrated Engineering Department of Chemical Engineering Kyung Hee University Gyeonggi 17104 Korea Republic of Nanomaterials Laboratory Department of Molecular Science and Technology Ajou University Suwon16499 Korea Republic of Daejeon34141 Korea Republic of Wako Saitama351-0198 Japan Department of Materials Science and Engineering Seoul National University Seoul Korea Republic of Department of Electronic Materials Engineering Kwangwoon University Seoul01897 Korea Republic of

Erstwhile, displays using down-converting color changing medium utilized color filters as an essential part of clarifying the trade-off between true colors and transmittance. In this study, we report the development of a novel, smart process for producing thin luminescent films that completely convert colors and enhance light intensity. Highly dense films are prepared by the co-deposition of perovskite quantum dots and metal oxide particles as color conversion layers and scattering agents, respectively. These layers can be directly deposited on blue organic light-emitting diodes using ultrasonic-assisted aerosol deposition (UAD). This method can allow displays using a down-conversion system to streamline the process due to absence of color filters. Using this method, films can be a minimum of 3 µm thick for complete conversion of blue light, a quarter that of inkjet-printed films. We demonstrate 7,353 cd m-2 in green and 411 cd m-2 in red converted emissions with no blue light leakage. Furthermore, the developed technique was shown to be compatible with versatile patterning processes. For example, UAD may be combined with a fine-metal shadow mask to produce a pattern of 30-μm-diameter dots. Even without using a mask, the method still produces a pattern of 13 μm wide lines. This system provides a new approach that may serve as an alternative to inkjet printing. © 2022, The Authors. All rights reserved.

关键词： Semiconductor quantum dots

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Vanadium Doping Enhances the Photo-Capacity of Fe2o3 Nanoflowers: A Promising Photo-Battery Electrode Material for Iron-Ion Batteries

SSRN

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SSRN 2023年

作者： Khan, Rashmi Banerjee, Joyita Sharma, Gyan Prakash Nagendra, Abharana Bhattacharyya, Dibyendu Sivakumar, Sri Department of Chemical Engineering Indian Institute of Technology UP Kanpur208016 India Materials Science Programme Indian Institute of Technology Kanpur UP Kanpur208016 India Centre for Environmental Science & Engineering Thematic Unit of Excellence on Soft Nanofabrication Indian Institute of Technology Kanpur UP Kanpur208016 India Atomic & Molecular Physics Division Bhabha Atomic Research Centre Mumbai400085 India

Photo-rechargeable metal-ion batteries have become popular as a renewable energy storage device that comprises both photo energy harvesting and energy storage component materials. Certain nanostructures which can play the dual functionality of both energy harvesting and storing it for future use are endorsed to mitigate the problems originating from joining these two modules that work separately. Herein, we report V5+ doped Fe2O3 (V = 8.2 atom%) nanoflowers in-situ grown on nickel foam as a single material possessing both energy harvesting and storing capability. This nanostructure has shown high-capacity values of ~ 280 mAh/g in dark and ~ 360 mAh/g under illumination with enhanced cyclic stability compared to undoped Fe2O3 nanostructures in an aqueous alkaline medium at 2 A/g. Studies from cyclic voltammetry suggest a capacity enhancement of 89.3% at a scan rate of 1 mV/s for the Fe2O3 nanoparticles after doping with V5+. Further, this nanostructure emerged to be as a potential photocathode for iron ion batteries (iron ion in tetramethylene glycol dimethyl ether as electrolyte) with a high initial charge and discharge capacities of 413 mAh/g and 496.6 mAh/g respectively at a current density of 500 mA/g with excellent cyclic stability. © 2023, The Authors. All rights reserved.

关键词： Energy harvesting

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