检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Luo, Huajie Tang, Shiyu Sun, Zheng Zhang, Yueyun Yao, Yonghao Zheng, Huashan Yang, Jikun Ren, Yang Tang, Mingxue Huang, Houbing Liu, Hui Hinterstein, Manuel Chen, Jun Beijing Advanced Innovation Center for Materials Genome Engineering Department of Physical Chemistry University of Science and Technology Beijing Beijing100083 China School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China Condensed Matter Science and Technology Institute School of Instrumentation Science and Engineering Harbin Institute of Technology Harbin150080 China Department of Physics City University of Hong Kong Kowloon 518057 Hong Kong School of Materials Science and Engineering Beijing University of Science and Technology China Institute of Applied Materials Ceramic Materials and Technologies Karlsruhe Institute of Technology Karlsruhe76131 Germany

The thermal stability of Bi0.5Na0.5TiO3-based piezoelectrics is one of the most critical metrics for practical applications. Finite element method (FEM) calculations estimate that incorporating Ag into the perovskite 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 (BNT-6BT) matrix will generate increased tensile stress during the cooling process from sintering temperatures due to the large mismatch in the thermal expansion coefficient. Thus, we propose a strategy to improve the depolarization temperature (Td) by introducing Ag into the representative BNT-6BT and forming perovskite/metal (BNT-6BT/100xAg) composite ceramics. The Td is improved to 145 °C without the degradation of piezoelectric response, which is approximately 45 °C higher than the prototype BNT-6BT. Comparative experiments demonstrate that the increase in Td stems from the synergistic effect of residual thermal stress, colossal grain size (above 200 μm), and oxygen vacancies. The present study provides an effective method to improve the thermal stability of BNT-based ceramics and can be also extended to other systems. © 2023, The Authors. All rights reserved.

关键词： Perovskite

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Alternative photothermal/electrothermal hierarchical membrane for hypersaline water treatment

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SusMat 2022年第6期2卷 679-688页

作者： Miao Wang Wen He Yuhui Hua Xinwen Xie Shiyan Chen Lei Zhou Yunmao Zhang Yaqi Hou Shihong Lin Haiping Xia Jing Zheng Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina College of Materials Xiamen UniversityXiamenChina Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamenChina Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis Department of ChemistrySouthern University of Science and TechnologyShenzhenChina Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Xiamen UniversityXiamenChina Department of Civil and Environmental Engineering Vanderbilt UniversityNashvilleTennesseeUSA Interdisciplinary Material Science Program Vanderbilt UniversityNashvilleTennesseeUSA Tan Kah Kee Innovation Laboratory Xiamen UniversityXiamenChina Engineering Research Center of Electrochemical Technologies of Ministry of Education Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina

Over the last decades,the treatment of the large quantities of hypersaline wastewater generated by conventional industries,inland desalination,and fossil-fueled power plants has been an important economic issue and also an inescapable green ***,we developed a versatile interfacial heating membrane with alternating utilization of electricity or solar energy for hypersaline water *** hierarchical membrane functions both as a separation membrane and an interface heater,which can quickly(<0.1 s)convert electricity or solar energy into heat to evaporate the outermost layer of hypersaline *** 10wt% hyper-saline water,the freshwater production rate can reach 16.8kg/m^(2)⋅h by applying a voltage of 10 V and 1.36 kg/m^(2)⋅h under 1-sun ***,it exhibits high electrochemical resistance to corrosion and therefore remains stable tack-ling hypersaline water(>5 wt%),with a high salt rejection rate of 99.99%.This system shows an efficient desalination strategy that can provide fresh water from brines for agriculture and industry,and even for daily life.

关键词： carbon nanotubes electrothermal hypersaline water treatment interface evaporate pho-tothermal

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Phase equilibria and thermodynamics assessment of the Co–Fe–Nb ternary system

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Intermetallics 2024年 168卷

作者： Hutabalian, Yohanes Hermana, Gita Novian Laksono, Andromeda Dwi Chen, Sinn-wen Department of Chemical Engineering National Tsing Hua University Taiwan Hsinchu30013 Taiwan Research and Development Center PT. Gotion Indonesia Materials Jakarta12950 Indonesia Department of Advanced Materials Engineering Bandung Polytechnic for Manufacturing West Java Bandung40135 Indonesia Department of Materials Science and Engineering National Taiwan University of Science and Technology Taiwan Taipei10672 Taiwan Study Program of Materials and Metallurgical Engineering Institut Teknologi Kalimantan Soekarno-Hatta Street Km. 15 Karang Joang East Kalimantan Balikpapan76127 Indonesia High Entropy Materials Center National Tsing Hua University Taiwan Hsinchu30013 Taiwan

The Co–Fe–Nb materials system is a crucial material for magnetic applications. Despite its importance, the phase equilibria and thermodynamic characteristics of this ternary system have not been explored in detail. This study employs the Calphad method to model the phase equilibria of the Co–Fe–Nb ternary system. To obtain the ternary interaction parameters, the experimental data on the isothermal sections at temperatures ranging from 700 °C to 1300 °C was evaluated. These findings indicate that the Co–Fe–Nb system contains no ternary compound, and the (Co,Fe)7Nb6 phase exists as a single solid solution. Significant solubility of the third element in the binary compounds of Co2Nb (Laves C14) and Fe2Nb (Laves C15) is also observed. The results are in good agreement with the experimental data. Furthermore, a liquidus projection of the system is presented, for the first time, revealing eight primary solidification phases in the Co–Fe–Nb ternary system. © 2024

关键词： Phase equilibria

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Passivation of Perovskite Films Using Ionic Liquids

Passivation of Perovskite Films Using Ionic Liquids

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2022 Advances in science and engineering Technology International Conferences, ASET 2022

作者： Alashkar, Adnan Ibrahim, Taleb Khamis, Mustafa Hai Alami, Abdul American University of Sharjah Materials Science and Engineering PhD Program Sharjah United Arab Emirates American University of Sharjah Department of Chemical Engineering Sharjah United Arab Emirates American University of Sharjah Department of Biology Chemistry and Enviromental Sciences Sharjah United Arab Emirates University of Sharjah Department of Sustainable and Renewable Energy Engineering Sharjah United Arab Emirates

ISBN: (纸本)9781665418010

In this paper, the carrier recombination, and dynamics of Perovskite Solar Cells (PSC) are investigated. Ionic Liquids (IL) are presented in the bulk perovskite in an attempt to improve the dynamics of the charge transport layer. Time Resolved Photoluminescence (TRPL) is utilized to study the fast electronic decay of the perovskite samples and the influence of the IL on the stability of the perovskite film. The ILs are added to the perovskite in three ratios (5%, 10%, and 20%). The results showed that the presence of the ILs increases the electron lifetime inside the perovskite layer. In addition, 10% IL/perovskite displayed the highest increase of 72% in the lifetime. Where, for higher ratios, the lifetime started deteriorating. © 2022 IEEE.

关键词： Ionic liquids

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Pulsing-Induced Healing of a Surface Crack of a Nickel-Based Alloy

SSRN

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SSRN 2024年

作者： Wang, Qian Quan, Mingming Tan, Zhen Liu, Ming Wang, Dianlong Yang, Xiao Liu, Ying Mao, Yaning Liang, Zhimin Yang, Fuqian Wang, Liwei School of Material Science and Engineering Hebei University of Science and Technology Shijiazhuang050018 China Hebei Key Laboratory of Material Near-Net Forming Technology Shijiazhuang050018 China School of Mechanical Engineering and Automation Fuzhou University Fuzhou350108 China HBIS Group Materials Institute HBIS Group Hebei Shijiazhuang050023 China Materials Program Department of Chemical and Materials Engineering University of Kentucky LexingtonKY40506 United States School of Material Science and Engineering Australia

In this work, we demonstrate the feasibility of applying electric pulses to heal surface cracks on Ni-based GH4169 alloy under compressive load. There exists an incubation time for the onset of the healing of a crack, which is associated with local temperature at the crack tip. The crack size decreases with increasing the pulsing time at a constant healing rate prior to complete healing of the crack. Increasing compressive load accelerates the healing process. The electric pulsing leads to the formation of an influential zone surrounding the crack with the finest grain sizes in the healed crack and the coarsest grain sizes away from the influential zone. The indentation hardness increases with the increase the distance to the crack tip of the healed crack. A model of viscous flow in the crack channel is proposed for the crack healing. The resultant force on the crack faces due to the crack healing increases with the increase of the healing time and the decrease of the crack width. © 2024, The Authors. All rights reserved.

关键词： Crack tips

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Influences of homogenous and heterogenous dopants on structural, electric, and thermodynamic properties of the gallium arsenide (GaAs) nanodot: A DFT study

Hybrid Advances

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Hybrid Advances 2025年 10卷

作者： Rahman, Aoly Ur Saaduzzaman, D.M. Hasan, Syed Mahedi Uddin Sikder, Md Kabir Department of Nanomaterials and Ceramic Engineering Bangladesh University of Engineering and Technology Dhaka Bangladesh Department of Physics Dhaka University of Engineering and Technology Gazipur Dhaka Bangladesh Department of Materials Science and Engineering Rensselaer Polytechnic Institute New York United States Department of Physics Florida Institute of Technology Melbourne FL United States Department of Physics Jahangirnagar University Savar Dhaka Bangladesh

In recent times, low-dimensional semiconducting materials have drawn the attention of researchers due to their wide range of applicability in technological sectors. Among different semiconducting materials, gallium arsenide (GaAs) is the second most prominent materials for developing devices due to its direct band gap and high electron mobility. In this work, the geometric, electronic, and thermodynamic properties of the GaAs nanodot after consecutive doping with homogenous transition metals (Ir–Ir) and heterogeneous transition metals (Ir–Ru & Ir–Pd) have been investigated. The investigation has been performed by employing density functional theory (DFT) with B3LYP hybrid functional using LanL2DZ basis set. The investigation reveals that the GaAs nanodot gains more stability (−98 eV ∼ −468 eV for doped clusters and −21 eV for the pristine cluster) and becomes efficient which is confirmed by studying binding energy and bond lengths in the heterogeneous doping process rather than the sequential homogenous doping process. Moreover, the infrared (IR) spectra analysis confirms that all structures might be found naturally in a stable and true energy minima, except Ga₂As₂Ir₂Ru2 because of the presence of imaginary frequency. Also, the band gap (1.2 eV–2 eV for all doped structures) exhibits a suitable semiconducting nature of the doped structures. The thermodynamic properties show that both homogenous and heterogenous doping techniques cause thermodynamic stability to the GaAs nanodot as well as make them more feasible. Finally, considering all the physicochemical properties it has been concluded that for GaAs nanodot, the heterogenous atom doping process is more efficient than the homogenous atom doping when the dopant number is the same. © 2025 The Authors

关键词： DFT Dopant-dopant interaction GaAs nanodot TM doped GaAs nanodot Transition metal

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Evolution of hierarchical petal-like 3D SnS2 as high-performance electrode materials for supercapacitor applications

Evolution of hierarchical petal-like 3D SnS2 as high-perform...

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作者： Kumar, Niraj Bhusan Sahoo, Bibhuti Chandra Sahu, Krushna Kumar Sahoo, Naresh Naik, Brundabana Soam, Ankur Kumar, Rahul Tripathi, Abhishek Kumar Sahoo, Prasanta Maharashtra Pune411025 India Department of Mechanical Engineering Siksha ‘O’ Anusandhan Deemed to be University Odisha Bhubaneswar751030 India Department of Chemistry Environmental Science and Technology Program Siksha ‘O’ Anusandhan Deemed to be University Odisha Bhubaneswar751030 India Department of Energy Science and Engineering IIT Delhi New Delhi110016 India Department of Metallurgical and Materials Engineering Malaviya National Institute of Technology Jaipur Jaipur302017 India

A simple one-step solvothermal approach has been adopted for the synthesis of SnS2. SEM shows hierarchically SnS2 with petal-like 3-dimensional layer structures because of this process. In this investigation, the as-prepared electrode material have an excellent specific capacitance of 721F g−1 at 1 mVs−1, indicating extraordinary performance. The improved electrochemical performance is because to unique ultrathin petal discrete structure, which provides increased electrolyte/electrode interface, high active sites, rapid ion/electron transfer, and short diffusion distances. A manufactured symmetric solid-state supercapacitor (SSC) device also has a large capacity to operate commercial LEDs, which allows for the assessment of its practical applicability in device-level application. According to the findings of this work, suitably layered 3D SnS2 electrode materials could be a promising route for the development of environmentally friendly energy storage applications. © 2022

关键词： Supercapacitor

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Development and Evaluation of a PANI/PMMA Composite Gas Sensor for Acetone Detection in Breath

Development and Evaluation of a PANI/PMMA Composite Gas Sens...

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STEM Education Conference (iSTEM-Ed), International

作者： Natnaree Phukkaphan Chayanin Khunarak Teerakiat Kerdcharoen Faculty of Science Materials Science and Engineering Program and Center of Nanoscience and Nanotechnology Mahidol University Bangkok Thailand Department of Physics Faculty of Science Mahidol University and NANOTEC Center of Excellence at Mahidol University Bangkok Thailand

ISBN: (数字)9798350365979

ISBN: (纸本)9798350365986

In recent years, the development of sensors capable of detecting acetone levels has garnered attention in health monitoring and personalized medicine. Acetone in the body, a ketone body produced during metabolic processes, has emerged as a promising biomarker for various health conditions, including diabetes, obesity, and metabolic disorders. Its presence in exhaled breath offers a non-invasive means of assessing metabolic health, presenting a unique opportunity for continuous monitoring and early intervention. This research investigated the use of a PANI/PMMA polymer sensor array to measure acetone gas. Breath samples and standard substances (acetone, butyric acid) were collected using a hygienic mask and measured with an electronic nose device. The tests showed the sensor could classify between a blank mask, acetone, butyric acid, and breath odors.

关键词： Obesity Precision medicine Education Electronic noses Sensors Polymers Monitoring

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Acid-catalyzed hydrothermal treatment of sewage sludge: effects of reaction temperature and acid concentration on the production of hydrolysis by-products

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Biomass Conversion and Biorefinery 2023年第9期13卷 7533-7546页

作者： Pham, Van Toi Guan, Chung-Yu Han, Po-Chun Matsagar, Babasaheb M. Wu, Kevin C. W. Ahamad, Tansir Chang, Ching-Yuan Yu, Chang-Ping Graduate Institute of Environmental Engineering National Taiwan University Taipei106 Taiwan Faculty of Environmental Engineering National University of Civil Engineering 55 Giai Phong Hai Ba Trung Hanoi100000 Viet Nam Department of Environmental Engineering National Ilan University Yilan260 Taiwan Ph.D. Program of Green Materials and Precision Devices National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Water Innovation Low Carbon and Environmental Sustainability Research Center National Taiwan University Taipei106 Taiwan

Sewage sludge (SS) is an organic biomass from wastewater treatment plants, but the use of SS to produce bio-based chemicals under acid-catalyzed hydrolysis (ACH) processes is not well investigated. In this study, ACH processes were performed at 120, 150, and 180 °C using sulfuric acid (H2SO4) with concentrations of 0–0.5 M within a reaction time of 90–180 min to produce bio-based chemicals from SS. The results showed that the reaction temperature, reaction time, and concentrations of H2SO4 affected the yields of sugars, levulinic acid (LA), and 5-hydroxymethylfurfural (HMF). The highest xylose and glucose yields were 7.69 mol% and 5.22 mol% at 120 °C with 0.5 M H2SO4 during the 180 min of reaction time, respectively. Besides, under the ACH process at 180 °C and 180 min, the yield of LA reached a maximum value of 0.48 mol% at 0.5 M H2SO4, and the highest yield of HMF was 1.66 mol% at 0.1 M H2SO4. The data obtained also indicated that the ACH process led to an increase in soluble chemical oxygen demand, dissolved organic carbon, and total dissolved nitrogen. Fluorescence excitation-emission matrix of dissolved organic matter and thermogravimetric analysis of the treated SS further supported the enhanced solubilization of SS after ACH process, especially under higher reaction temperature and concentrations of H2SO4. Although the lower yields of bio-based chemicals might restrict the downstream recovery of the target products, the largely improved SS solubilization by ACH suggests that acid-catalyzed hydrothermal hydrolysis process has potential as an alternative pretreatment method of SS. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Sewage sludge

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Measurement of Muscle Stimulation and Hot Compression for Rehabilitation 3

Measurement of Muscle Stimulation and Hot Compression for Re...

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3rd International Conference on Electrical, Communication and Computer engineering, ICECCE 2021

作者： Chirakanphaisarn, Neramitr Thongkanluang, Thadsanee Thammasat University Faculty of Engineering Department of Electrical and Computer Engineering Thailand Suratthani Rajabhat University Program in Materials Technology Manufacturing Faculty of Science and Technology Thailand

ISBN: (纸本)9781665438971

This research is to study the electric muscle stimulation system and hot compress. As well as focusing on building tools for applications in rehabilitation medicine and physical therapy. The neuromuscular system is an important mechanism in human life. In the event that the muscles are stressed or contracted while the subject is recovering, the need for recovery and stimulation tools is an important part of the physical therapy. We designed electrical circuits for automatic control and used an ARDUINO microcontroller to connect analog and digital ports to transmit and receive clinical parameters. The number of voluntary subjects was 20. Each subject remembered to perform 5 stimulation sessions for 10 minutes. Total period that the researcher collects data is approximately 3 months. The trials were based on ethical studies in humans, where trials and researches showed that subjects were 980% satisfied with very few side effects, and subjects had improved muscle development. © 2021 IEEE.

关键词： Muscle

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