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LOWER OLEFINS SYNTHESIS IN FISCHER–TROPSCH PROCESS USING SUPPORTED IRON-CATALYSTS

UPB Scientific Bulletin, Series B: Chemistry and Materials science 2022年第3期84卷 3-14页

作者： Vintila, Alin Trifan, Adrian Calinescu, Ioan Bioresources and Polymer Science Department Faculty of Chemical Engineering and Biotehnologies University POLITEHNICA of Bucharest Romania National Research & Development Institute for Chemistry and Petrochemistry ICECHIM Bucharest Romania

Different Fe catalysts have been synthesized both conventionally and by ultrasonic impregnation with different promoters (K, Mn) to obtain light olefins with high selectivity from the synthesis gas, avoiding excess CO2 production and reducing CH4 formation. The performance of proposed catalysts was analyzed and compared in terms of CO conversion, saturated hydrocarbons C2-C4 selectivity, unsaturated hydrocarbons C2-C4 selectivity, and unsaturated hydrocarbons C2-C4 yield, while varying the temperature in the range 250 – 350 °C. The influence of CO:H2 molar ratio (1:1 and 1:2) was also observed. © 2022, Politechnica University of Bucharest. All rights reserved.

关键词： Ultrasonics

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Realizing translucency in aluminosilicate glass at ultralow temperature via cold sintering process

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Journal of Advanced Ceramics 2022年第11期11卷 1714-1724页

作者： Jie GAO Kangjing WANG Wei LUO Xiaowei CHENG Yuchi FAN Wan JIANG State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of Chemistry Fudan UniversityShanghai 200438China

Glass with high visible-light transparency is widely considered as the most important optical material,which typically requires a processing temperature higher than 1000℃.Here,we report a translucent aluminosilicate glass that can be prepared by cold sintering process(CSP)at merely 300℃.After eliminating structural pores in hexagonal faujasite(EMT)-type zeolite by heat treatment,the obtained highly active nanoparticles are consolidated to have nearly full density by adding NaOH solution as liquid ***,direct densification of EMT powder cannot remove the structural pores of zeolite completely,leading to an opaque compact after the *** is proved that the chemical reaction between the NaOH-and zeolite-derived powders is highly beneficial to dissolution–precipitation process during sintering,leading to the ultra-low activation energy of 27.13 kJ/*** the addition of 5 M NaOH solution greatly promotes the densification via the reaction with aluminosilicate powder,lower or higher concentration of solvent can deteriorate the transmittance of ***,the CSP-prepared glass exhibits a Vickers hardness of 4.3 GPa,reaching 60%of the reported value for spark plasma sintering(SPS)-prepared sample.

关键词： glass cold sintering process(CSP) optical properties mechanical properties

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Electrochemical energy storage application of CuO/CuO@Ni-CoMoO4·0.75H2O nanobelt arrays grown directly on Cu foam

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Progress in Natural science:Materials International 2022年第2期32卷 163-170页

作者： Bingbing Zhang Qian Liu Kaibing Xu Rujia Zou Chunrui Wang Department of Physics Donghua University Research Center for Analysis and Measurement Donghua University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University

Supercapacitors are attracting huge research interest because they are expected to achieve battery-level energy density,and they have a longer calendar life and shorter charging ***,due to the out shell materials without contact extra freeway for charge transports,the out shell materials have still limited contribution to high capacitance for array structure at high ***,CO/CO@Ni-CMO NBs were designed and synthesized on Cu foam substrates with CuO NBs as cores or extra freeway and Ni-CoMoO4·0.75 H2O nanobelt as shell by an easily synthetic *** NBs will provide electron "superhighways" and extra outside freeway for charge storage and ***,the Ni doped CoMoO4·0.75 H2O NBs are conducive to the electrical conductivity,and open space among these nanosheets can act as an "ion reservoir",the increment of active sites and the contribution of capacitive ***,the CO@Ni-CMO NBs directly grown on Cu foam could avoid the "dead" volume caused by the tedious process of mixing active materials with polymer binders/conductive *** expected,the CO/CO@Ni-CMO NBs exhibited the high specific capacitance,the good rate performance and the excellent electrochemical stability.

关键词： CuO/CuO@Ni–CoMoO4·0.75H2O Nanobelt arrays Multipath transfer electrons High specific capacitance Cyclic stability

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The revolution of type I organic photosensitizers:current strategies and future directions

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science Bulletin 2025年第8期70卷 1203-1206页

作者： Mengyao Yang Luyan Zhou Yuan-Yuan Zhao Kunemadihalli Mathada Kotraiah Swamy Aibing Chen Juyoung Yoon College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Department of Chemistry and Nanoscience Ewha Womans UniversitySeoul03760Republic of Korea Graduate Program in Innovative Biomaterials Convergence Ewha Womans UniversitySeoul03760Korea

In contrast to traditional treatment methods,such as surgery,chemotherapy,and radiotherapy,photodynamic therapy(PDT)is a unique non-invasive modality with accurate temporal and spatial control,minimal side effects,and... 详细信息

关键词： pdt photodynamic therapy traditional treatment contrast radiotherapyphotodynamic therapy pdt type I organic photosensitizers cancer treatment revolution

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Development of organic redox-active materials in aqueous flow batteries: Current strategies and future perspectives

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SmartMat 2023年第4期4卷 85-104页

作者： Mingguang Pan Minhua Shao Zhong Jin State Key Laboratory of Coordination Chemistry MOE Key Laboratory of Mesoscopic ChemistryMOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

Aqueous redox flow batteries,by using redox-active molecules dissolved in nonflammable water solutions as electrolytes,are a promising technology for grid-scale energy *** redox-active materials offer a new opportunity for the construction of advanced flow batteries due to their advantages of potentially low cost,extensive structural diversity,tunable electrochemical properties,and high natural *** this review,we present the emergence and development of organic redox-active materials for aqueous organic redox flow batteries(AORFBs),in particular,molecular engineering concepts and strategies of organic redox-active *** typical design strategies based on organic redox species for high-capacity,high-stability,and high-voltage AORFBs are outlined and *** engineering of organic redox-active molecules for high aqueous solubility,high chemical/electrochemical stability,and multiple electron numbers as well as satisfactory redox potential gap between the redox pair is essential to realizing high-performance *** molecular engineering,the redoxtargeting strategy is an effective way to obtain high-capacity *** further discuss and analyze the redox reaction mechanisms of organic redox species based on a series of electrochemical and spectroscopic approaches,and succinctly summarize the capacity degradation mechanisms of ***,the current challenges,opportunities,and future directions of organic redox-active materials for AORFBs are presented in detail.

关键词： aqueous redox flow batteries grid energy storage molecular engineering strategies organic redox-active materials redox reaction mechanisms

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Optimizing Neural Networks for Academic Performance Classification Using Feature Selection and Resampling Approach

Mendel

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Mendel 2023年第2期29卷 261-272页

作者： Supriyadi, Didi Purwanto, Purwanto Warsito, Budi Doctorate Program of Information Systems School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Statistics Faculty of Science and Mathematics Universitas Diponegoro Semarang Indonesia Department of Information System Faculty of Informatics Institut Teknologi Telkom Purwokerto Banyumas Indonesia

The features present in large datasets significantly affect the performance of machine learning models. Redundant and irrelevant features will be rejected and cause a decrease in machine learning model performance. This paper proposes HyFeS-ROS-ANN: Hybrid Feature Selection and Resampling combination method for binary classification using artificial neural network multilayer perceptron (MLP). The first stage of this approach is to use a combination of two feature selection methods to select essential features that are highly correlated with model performance. The second stage of this approach is to use a combination of resampling methods to handle unbalanced data classes. Both approaches are applied to the academic performance classification model using the MLP neural network. This research dataset is obtained using three-dimensional (3D) frameworks such as the Big Five Personality to determine the Personality that affects academic performance from the student dimension, the Family Influence Scale (FIS), which measures factors that affect academic performance from the family dimension, and Higher Education Institutions Service Quality (HEISQUAL) to measure service quality and its influence on academic performance from the Education institution dimension. Previous research shows that the CoR-ANN algorithm has a model accuracy rate of 94%. The research results based on the dataset show that our proposed method can improve accuracy by selecting more relevant and essential features in improving model performance. The results show that the features are reduced from 135 to 108, while the HyFS-ROS-ANN model for binary classification accuracy increases to 100%. © 2023, Brno University of Technology. All rights reserved.

关键词： Feature Selection

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Temperature‑Gated Light‑Guiding Hydrogel Fiber for Thermoregulation During Optogenetic Neuromodulation

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Advanced Fiber Materials 2023年第3期5卷 968-978页

作者： Guoyin Chen Siming Xu Qiangqiang Zhou Yuejiao Zhang Yuhan Song Jing Mi Yuehua Liu Kai Hou Jie Pan Department of Orthodontics Shanghai Stomatological Hospital and School of StomatologyFudan UniversityShanghai 200001China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620China

With the rise of optogenetic manipulation of neurons,the effects of optogenetic heating on temperature-sensitive physi-ological processes,and the damage to surrounding tissues have been *** manuscript reports the fabrication of a highly temperature-sensitive semi-interpenetrating optical hydrogel fiber(TSOHF)using the integrated dynamic wet-spinning *** exhibits a structural tunable diameter,clear core/sheath structure,tunable temperature-sensitivity,excellent light propagation property(0.35 dB cm^(-1),650 nm laser light),and good biocompatibility(including tissue-like Young’s modulus,stable dimensional stability,and low cytotoxicity).Based on these properties,a potential application of optogenetic regulation of neural tissue(hypoglossal nerve),with controllable temperature using TSOHF was designed and ***,this work provides new insight into molecular design and a practical approach to continually manufacture a temperature-sensitive hydrogel optical fiber for applications in intelligent photomedicine.

关键词： Temperature-sensitive Light-guiding Fiber Thermoregulation Optogenetic

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Sulfated liposome-based artificial cell membrane glycocalyx nanodecoys for coronavirus inactivation by membrane fusion

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Bioactive Materials 2024年第3期33卷 1-13页

作者： Xu Li Ningtao Cheng Danrong Shi Yutong Li Chen Li Miaojin Zhu Qiao Jin Zhigang Wu Linwei Zhu Yi He Hangping Yao Jian Ji MOE Key Laboratory of Macromolecule Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China School of Medicine Zhejiang UniversityHangzhou310058China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou310003China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou310027China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030032China

As a broad-spectrum antiviral nanoparticle,the cell membrane nanodecoy is a promising strategy for preventing viral ***,most of the cell membrane nanodecoys can only catch virus and cannot induce inactivation,which may bring about a considerably high risk of re-infection owing to the possible viral escape from the *** tackle this challenge,sulfated liposomes are employed to mimic the cell membrane glycocalyx for constructing an artificial cell membrane glycocalyx nanodecoy that exhibits excellent anti-coronavirus activity against HCoV-OC43,wild-type SARS-CoV-2,Alpha and Delta variant SARS-CoV-2 *** addition,this nanodecoy,loaded with surface sulfate groups as SARS-CoV-2 receptor arrays,can enhance the antiviral capability to virus inactivation through destroying the virus membrane structure and transfer the spike protein to postfusion *** bio-inspired recognition and inactivation of viruses in a single supramolecular entity,the artificial cell membrane nanodecoy opens a new avenue for the development of theranostic antiviral nanosystems,whose mass production is favored due to the facile engineering of sulfated liposomes.

关键词： Antiviral nanoparticle Cell membrane nanodecoy Coronavirus Viral inactivation

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Universal nanocomposite coating with antifouling and redox capabilities for electrochemical affinity biosensing in complex biological fluids

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Nanoscale Horizons 2024年第5期9卷 843-852页

作者： Bharti, Aditya Manu Rakesh Kumar, R.K. Chuang, Cheng-Hsin Shaikh, Muhammad Omar International PhD Program for Science National Sun Yat-sen University Kaohsiung80424 Taiwan Institute of Medical Science and Technology National Sun Yat-sen University Kaohsiung80424 Taiwan Department of Chemical Engineering National Taiwan University Taipei City10617 Taiwan Institute of Biomedical Engineering and Nanomedicine National Healthcare Research Institutes Miaoli County350 Taiwan National Sun Yat-sen University Kaohsiung80424 Taiwan Sustainability Science and Management Program Tunghai University Taichung407224 Taiwan

Electrochemical affinity biosensors have the potential to facilitate the development of multiplexed point-of-care diagnostics in complex biological fluids. However, their commercial viability has been hindered by challenges such as electrode biofouling and the lack of inherent redox properties. To address this unmet need, we have developed a universal nanocomposite coating which is unique in its ability to not only allow oriented conjugation of the biorecognition element but also specific detection directly in complex biological fluids like serum and urine owing to its built-in antifouling and redox capabilities, thus improving suitability for point of care testing. This multifunctional coating comprises a 3D porous crosslinked bovine serum albumin matrix for oriented conjugation and antifouling properties with embedded graphene nanosheets modified with amino-ferrocene for enhanced conductivity and mediator-free biosensing. The coating showed minimal signal degradation despite prolonged exposure to 1% bovine serum albumin, artificial urine and untreated human serum for up to 30 days. To demonstrate its utility, we fabricated and tested proof-of-concept electrochemical immunosensors for bladder cancer protein biomarkers, specifically interleukin-8 (IL-8) and vascular endothelial growth factor (VEGF). The practical feasibility was highlighted by the excellent sensitivity and specificity observed for IL-8 and VEGF with a limit of detection of 41 pg mL−1 and 67 pg mL−1, respectively. Consequently, this universal nanocomposite-based electrochemical biosensing platform can be extended to the point of care testing of a broad spectrum of biomarkers present in complex biological fluids, thus enabling reliable and early diagnostics. © 2024 The Royal Society of Chemistry

关键词： Biomarkers

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Inverse Hall-Petch effect in nanocrystalline ice predicted by machine-learned coarse-grained molecular simulations

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Journal of Micromechanics and Molecular Physics 2023年第1期8卷 1-10页

作者： Chen, Guang Tao, Lei Kröger, Martin Li, Ying Department of Mechanical Engineering University of Connecticut Storrs 06269 CT United States Department of Materials Polymer Physics Eth Zürich Zürich CH-8093 Switzerland Department of Mechanical Engineering Institute of Materials Science University of Connecticut Storrs 06269 CT United States Polymer Program Institute of Materials Science University of Connecticut Storrs 06269 CT United States

We study the grain-size effect on mechanical behaviors of polycrystalline ice at nanoscale through large-scale molecular dynamics simulations, enabled by an accurate and efficient machine-learned coarse-grained water model [H. Chan, M. J. Cherukara, B. Narayanan, T. D. Loeffler, C. Benmore, S. K. Gray and S. K. Sankaranarayanan. Machine learning coarse grained models for water. Nature Communications 10(1), p. 379, 2019]. Polycrystalline ice systems with different grain sizes in the range of 5∼30 nm are systematically investigated through uniaxial tensile tests. Simulation results reveal that Young's modulus and yield strength increase as the grain size increases, leading to an inverse Hall-Petch effect in nanocrystalline ice. Such an observation is significantly different from the conventional Hall-Petch effect in polycrystalline ice observed by experiments at millimeter scale. The deformation behavior suggests that grain boundaries (GBs), rather than grain interiors, play the active role in accommodating external loading in nanocrystalline ice. Further void analysis of nanocrystalline ice during deformation reveals that nanocrack initiates and propagates along GBs and eventually leads to failure of systems with larger grain sizes (≥20nm), yielding a sudden drop in the stress-strain curve. While for systems with smaller grain sizes (≤15nm), only extensive plastic deformation is presented without significant void growth. Our simulation results demonstrate that the GB sliding is the governing mechanism for the inverse Hall-Petch effect observed in nanocrystalline ice. © 2023 World Scientific Publishing Company.

关键词： grain boundary inverse Hall-Petch effect molecular dynamics simulation Polycrystalline ice water model

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