检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Campos, João V. Lavagnini, Isabela Reis Zallocco, Vinicius Martins Ferreira, Eduardo B. de Jesus Agnolon Pallone, Eliria Maria Rodrigues, Ana Candida Martins Graduate Program in Materials Science and Engineering Federal University of São Carlos SP São Carlos13635-905 Brazil Department of Materials Engineering Federal University of São Carlos SP São Carlos13635-905 Brazil Center for Research Technology and Education of Vitreous Materials CeRTEV FAPESP LaMaV DEMa/UFSCar SP São Carlos13635-905 Brazil Department of Biosystem Engineering University of São Paulo USP Av. Duque de Caxias Norte 225 SP Pirassununga13635-900 Brazil Postgraduate Programme in Materials Science and Engineering University of São Paulo USP FZEA Av. Duque de Caxias Norte 225 Pirassununga13635-900 Brazil Department of Materials Engineering São Carlos School of Engineering University of São Paulo USP SP São Carlos13566-590 Brazil

Single-phased Li1.5Al0.5Ge1.5(PO4)3NaSICON (Na superionic conductor) glass-ceramic is obtained via a new route using flash-sinter crystallization . Green pellets of glass powder are sinter-crystallized in a few seconds. Our results suggest that controlling the current rise during the flash event is needed to avoid overheating that could cause the melting of the samples. A processing map for the flash sinter-crystallization of Li1.5Al0.5Ge1.5(PO4)3 is developed and presented based on the current density and holding time at the steady-state. The samples fabricated by flash sinter-crystallization are compared with conventionally heated ones. Using this novel technique, single-phase glass-ceramics were obtained with total ionic conductivity at room temperature surpassing those prepared by conventional heating (2.26 10-4S cm-1 and 1.36 10-4S cm-1, respectively). © 2022, The Authors. All rights reserved.

关键词： Solid electrolytes

来源：评论

学校读者我要写书评

暂无评论

Effects of the annealing process on the physical properties of p-Terphenyl films deposited on dichroic filters for X-ARAPUCA

引用

Journal of Instrumentation 2025年第6期20卷 C06006-C06006页

作者： A.P.A. Mendonça L.L. Pagliuso R.B. Merlo F.C. Marques A.A. Machado B.L. Perotti C.A. Figueroa E. Segreto Institute of Physics Gleb Wataghin Universidade Estadual de Campinas (Unicamp) Campinas 13083-859 SP Brazil Postgraduate Program in Materials Science and Engineering (PPGMAT) Universidade de Caxias do Sul (UCS) Caxias do Sul 95070-560 RS Brazil

This study evaluated the adhesion behavior and efficiency of p-Terphenyl (PTP) films subjected to annealing at various temperatures. After substrate cleaning and vacuum thermal evaporation, the samples were annealed in a muffle furnace with a temperature ramp rate of 10 °C/min. The minimum annealing temperature was determined through thermogravimetric analysis. The samples were characterized morphologically and structurally, both before and after annealing, to investigate how these properties were influenced by the thermal process. The VUV light transmission efficiency variation of the PTP film was measured using a monochromator, while adhesion to the substrate was assessed using Scratch Test. The results indicated significant improvements in the optimization of X-ARAPUCA devices. Specific annealing processes were found to enhance the crystallinity and structural order of the films. At moderate annealing temperatures (up to 70 °C), both adhesion and efficiency improved. Conversely, higher temperatures led to material degradation and increased surface roughness. At 70 °C, efficiency increased by approximately 10%, and adhesion was optimized, as evidenced by an increase in the critical supported load, which reached 75 mN.

关键词： Scintillation counters

来源：评论

学校读者我要写书评

暂无评论

Phase formation, microstructural and superconducting properties of YBCO added Ca-compounds extraction eggshells

Results in Materials

引用

Results in materials 2025年 26卷

作者： Yap, Siew Hong Awang Kechik, Mohd Mustafa Humaidi, Syahrul Mohd Shariff, Khairul Khaizi Baqiah, Hussien Chen, Soo Kien Lim, Kean Pah Mohd Zaid, Mohd Hafiz Yaakob, Yazid Abdul Karim, Mohd Khalis Talib, Zainal Abidin Loh, Zhi Wei Kamarudin, Aliah Nursyahirah Shaari, Abdul Halim Miryala, Muralidhar Superconductor & Thin Films Laboratory Department of Physics Faculty of Science Universiti Putra Malaysia UPM Serdang Selangor Darul Ehsan 43400 Malaysia Postgraduate Program (Physics) FMIPA Universitas Sumatera Utara Medan 20222 Indonesia Microwave Research Institute Universiti Teknologi MARA Selangor Shah Alam 40450 Malaysia Shandong Key Laboratory of Biophysics Institute of Biophysics Dezhou University No. 566 University Rd. West Shandong Dezhou China Department of Physics College of Natural Sciences Jeonbuk National University 567 Baekjedaero Deokjingu Jeollabukdo Jeonjusi 54896 South Korea Materials for Energy and Environmental Laboratory Superconducting Materials Group of Science & Engineering Shibaura Institute of Technology 3-7-5 Foxesu Koto-ku Tokyo 135-8548 Japan

For several decades now, the emergence and production of high-quality bulk rare-earth-based superconductors, particularly YBa2Cu3O7-δ (YBCO/Y-123), have been noteworthy advancements with potential implications in var... 详细信息

For several decades now, the emergence and production of high-quality bulk rare-earth-based superconductors, particularly YBa₂Cu₃O_7-δ (YBCO/Y-123), have been noteworthy advancements with potential implications in various fields. This unique research investigated the potential of using chicken eggshells as a source of calcium compounds (CaO, CaCO₃ and Ca(OH)₂) for the synthesis of YBCO. The green approach synthesis of YBCO added with Ca-compounds (0.0100 wt% ≤ x ≤ 0.6000 wt%) was conducted in a systematic manner via thermal treatment method. The crystal structure, surface morphology, and chemical composition of the specimens were characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), and Energy Dispersive X-Ray Spectroscopy (EDX). The results showed the formation of orthorhombic Y-123 phase, Pmmm space group with the high-intensity peaks of Y-123. The addition of Ca-compounds proposed a different trend of grain degradations in the YBCO matrix system with the appearance of Ca-compounds' impurity phases. The superconducting properties such as electrical resistivity analyzed using electrical resistance measurement. Surprisingly, the superconducting parameters improved after Ca-compounds were added into the YBCO system. The hole concentration, p reached the highest value among all the specimens with the lowest superconducting transition width, ∼ΔT_c = 3.805 K (T_c-onset = 93.223 K and T_{c(R = 0)} = 89.418 K) for the lowest concentration of Ca-compounds i.e., 0.0375 wt%. This great finding targeted the green approach impurity materials into YBCO system that can usefully enhance the superconducting properties at high temperature which covers the idea of addition with deficient concentration Ca-compounds. © 2025

关键词： Ca-compounds Critical temperature Grains degradations Hole concentration Superconducting transition width

来源：评论

学校读者我要写书评

暂无评论

Metal-enriched nanoparticles and black carbon:A perspective from the Brazil railway system air pollution

引用

Geoscience Frontiers 2021年第3期12卷 624-635页

作者： Bianca D.Lima Elba C.Teixeira James C.Hower Matheus S.Civeira Omar Ramírez Cheng-Xue Yang Marcos L.S.Oliveira Luis F.O.Silva Postgraduate Program in Remote Sensing and Meteorology Geosciences InstituteUniversidade Federal do Rio Grande do SulAv.Bento Gonçalves9500Porto AlegreRS 91501–970Brazil Research Department Fundação Estadual de Proteção Ambiental Henrique Luís RoesslerAv.Borges de Medeiros261Porto AlegreRS 90020–021Brazil Center for Applied Energy Research University of Kentucky2540 Research Park DriveLexingtonKY 40511USA Postgraduate Program in Mines Metallurgy and MaterialsUniversidade Federal do Rio Grande do SulAv.Bento Gonçalves9500Porto AlegreRS 91501–970Brazil Faculty of Engineering Environmental EngineeringUniversidad Militar Nueva GranadaKm 2 CajicáZipaquiráColombia Institute of Earth Science China University of Geosciences(Beijing)29 Xueyuan RdHaidian DistrictChina Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55-66BarranquillaAtlanticoColombia Universidad de Lima Departamento de Ingeniería civil y Arquitectura.Avenida Javier Prado Este 4600–Santiago de Surco 1503Peru

Having a better understanding of air pollutants in railway systems is crucial to ensure a clean public *** study measured,for the first time in Brazil,nanoparticles(NPs)and black carbon(BC)on two groundlevel platforms and inside trains of the Metropolitan Area of Porto Alegre(MAPA).An intense sampling campaign during thirteen consecutive months was carried out and the chemical composition of NPs was examined by advanced microscopy *** results showed that highest concentrations of the pollutants occur in colder seasons and influenced by variables such as frequency of the trains and passenger ***,internal and external sources of pollution at the stations were *** predominance of NPs enriched with metals that increase oxidative stress like Cd,Fe,Pb,Cr,Zn,Ni,V,Hg,Sn,and Ba both on the platforms and inside trains,including Fe-minerals as hematite and magnetite,represents a critical risk to the health of passengers and employees of the *** interdisciplinary and multi-analytical study aims to provide an improved understanding of reported adverse health effects induced by railway system aerosols.

关键词： Nanoparticles Potential hazardous elements Environmental chemistry Human health Railway environment Indoor air quality

来源：评论

学校读者我要写书评

暂无评论

Morphological Characterization of Brazil Nut Tree (Bertholletia excelsa) Fruit Pericarp

引用

Journal of Renewable materials 2019年第7期7卷 683-692页

作者： Gustavo P.Petrechen Marcos Arduin JoséD.Ambrósio Materials Science and Engineering Postgraduate Program Federal University of São CarlosSão CarlosBrazil Center of Characterization and Materials Development Federal University of São CarlosSão CarlosBrazil Department of Botany Federal University of São CarlosSão CarlosBrazil Citlab-Science Innovation and Technology LaboratorySorocabaBrazil

This article presents the overall morphological structure of the Brazil nut tree(Bertholletia excelsa)fruit pericarp,from macro to nano *** acquired knowledge would be used for the development of new applications,like using the materials as fillers for biocomposites,or as a hierarchical architecture model for *** research was performed using stereo and light microscopy and conventional and force field emission scanning electron *** pericarp presents three layers:the exocarp,a dark gray,brittle and fragile outer layer;the mesocarp,a beige,dry,rigid,impermeable and fibrous intermediate layer;and the endocarp,an inner layer with similar characteristic as the exocarp,but formed next to the ***,the exocarp and the endocarp presented minor regions of sclereids,fibers and vascular cell bundles,inside major regions of parenchyma *** mesocarp presents a structure of fiber cells regions alternating with sclereids and vascular cells regions,arranged in a composite like arrangement,with the fibers cells bundles acting as randomly oriented disperse phases in a sclereid cells *** arrangement was associated with the mesocarp relative superior proprieties,indicating a great material for using as fillers for biocomposites or in biomimetics applications.

关键词： Bertholletia excelsa brazil nut fruit pericarp morphological structure microscopy

来源：评论

学校读者我要写书评

暂无评论

Photodegradation and toxicity assessment of doxycycline using metal (Co, Cu, Fe, and Zn) modified Bi 2 O 3 thin films

引用

Ceramics International 2025年

作者： Fatkhiyatus Sa’adah Heri Sutanto Hadiyanto Hadiyanto Chechia Hu Yu Syuan Liou Lely Ayu Ningsih Doctoral Program of Environmental Science School of Postgraduate Diponegoro University Semarang-Indonesia 50275 Smart Materials Research Center (SMARC) Diponegoro University Semarang-Indonesia 50275 Department of Physics Faculty of Science and Mathematics Diponegoro University Semarang-Indonesia 50275 Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang-Indonesia 50275 Department of Chemical Engineering Sustainable Electrochemical Energy Development Center (SEED) National Taiwan University of Science and Technology Da’an District Taipei City Taiwan 106

Doxycycline (DOX) is a widely used antibiotic, with its usage increasing significantly over the past five years, leading to greater environmental pollution. This research examines the potential of bismuth oxide (Bi 2 O 3 ) thin films modified with transition metal ions (Co, Cu, Fe, and Zn) as novel photocatalysts for the degradation of DOX when exposed to UV irradiation. In this study, 3 wt% of metal were incorporated into Bi 2 O 3 thin films using the sol-gel method and applied to slide glass using a spray coating technique. The ultraviolet–visible absorption spectrum exhibited a significant red shift, enabling the band gap to be reduced from 2.82 to 2.49 eV. DOX degradation was performed using various catalyst, with Zn-Bi 2 O 3 thin films showing the highest performance with 87.28% degradation, rate constant of 0.0951 min -1 , 65.45% mineralization, and a turnover frequency (TOF) of 4.35 h -1 . The degradation process remains steady even after five cycles and effective across different pH conditions, with optimal results observed between pH 5 and 7. Trapping experiments identified , , and as the primary reactive species driving the degradation. Moreover, the photocatalytic mechanism of Zn-Bi 2 O 3 has been comprehensively analyzed through a combination of experimental investigation and DFT calculations. In addition, toxicity assessments were conducted using the Toxicity Estimation Software Tool (T.E.S.T.), and bacterial cultivation tests with S. aureus and E. coli , confirming that Zn-Bi 2 O 3 thin films effectively reduces the environmental risks of DOX through photodegradation. This study demonstrated the efficacy of photocatalytic degradation in addressing antibiotic pollution.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Antimicrobial Potential of Linear Low-Density Polyethylene Food Packages with Ag Nanoparticles in Different Carriers (Sio2 and Hap)

SSRN

引用

SSRN 2023年

作者： da Costa Brito, Sabrina Pereira, Vinicius Alex Cano Prado, Ana Carolina Figueiredo Tobias, Thais Juliana Paris, Elaine Cristina Ferreira, Marcos David São Paulo State University "Julio de Mesquita Filho" Rod. Araraquara Jaú Km 01 SP Araraquara14800-903 Brazil Embrapa Instrumentação Rua XV de Novembro 1452 SP São Carlos13560-970 Brazil Biotechnology Graduate Program Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil Postgraduate Program in Materials Science and Engineering Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil Chemistry Graduate Program University of Sao Paulo Av. Trabalhador São-carlense 400 SP São Carlos13.560-970 Brazil Postgraduate Program in Chemistry Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil

This study intended to verify the antimicrobial efficacy of linear low-density polyethylene films incorporated with silver nanoparticles dispersed in silica and hydroxyapatite carriers at different concentrations. The silver nanoparticles showed a superior inhibitory action on S. aureus and hydroxyapatite was more effective, being this a potential for use in food packaging. © 2023, The Authors. All rights reserved.

关键词： Polymer films

来源：评论

学校读者我要写书评

暂无评论

Zn-doped Nb 2 O 5 as a photocatalyst for rhodamine B degradation and antimicrobial applications: A study on doping concentration effects

引用

Ceramics International 2025年

作者： Cátia Liane Ücker Renato de Gouveia Cantoneiro Suelen Rodrigues Almeida Giovanni Mikael Noguera Fabra Darwin de Oliveira Brum Camila Cristina De Foggi Marcio Daldin Teodoro Fernando Dal Pont Morisso Valmor Roberto Mastelaro Cristiane Wienke Raubach Sergio da Silva Cava Mateus Meneghetti Ferrer Graduate Program in Materials Science and Engineering Technological Development Center Federal University of Pelotas 96010-610 Pelotas RS Brazil Graduate Program in Engineering and Materials Science (PIPE) Federal University of Paraná 81531-990 Curitiba PR Brazil Department of Conservative Dentistry Dental Materials Laboratory School of Dentistry Federal University of Rio Grande do Sul 90035003 Porto Alegre RS Brazil Department of Physics Federal University of São Carlos 13565-905 São Carlos SP Brazil Postgraduate in Materials Technology and Industrial Processes Feevale University 93525-075 Novo Hamburgo RS Brazil São Carlos Institute of Physics University of São Paulo IFSC - USP 13566-590 São Carlos SP Brazil

Zn doped Niobium oxide (Nb 2 O 5 ) prepared by microwave-assisted hydrothermal synthesis was applied to Rhodamine B degradation and, for the first time, to antimicrobial applications. The influence of Zn incorporation in the structure was evaluated using various characterization techniques, including X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, photoluminescence (PL), and UV–visible spectroscopy. All samples exhibited low crystallinity of the pseudo-hexagonal phase due to the temperature used in the material synthesis. The results revealed that increasing the zinc content enhances the number of surface pores and that, up to 1.5 % zinc, reduces the bandgap value. Samples with up to 1.5 % zinc insertion demonstrated improved Rhodamine B dye decolorization efficiency, achieving 100 % decolorization efficiency within 120 min. However, higher zinc concentrations resulted in decreased RhB decolorization performance. Reusability tests confirmed the excellent stability of the samples. Furthermore, the 0.5-ZnNb and 1-ZnNb samples showed strong antimicrobial activity against different microorganisms. This study promotes the development of more sustainable and environmentally responsible processes by synthesizing Nb 2 O 5 with different zinc proportions. The resulting material is applied in both the degradation of organic pollutants and the microbial disinfection of wastewater. The adopted methodology aims to optimize photocatalytic antimicrobial efficiency, providing an effective and eco-friendly solution for effluent treatment, contributing to a cleaner and safer approach to contaminated water management.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Synthesis, Characterization, and performance test of modified Zeolite-Si/Al nanocomposite from pumice and waste cans using slow pyrolysis process for removal pollutant parameters from hard water

引用

Environmental Nanotechnology, Monitoring and Management 2023年 20卷

作者： Gusti Wibowo, Yudha Sudibyo Rianjanu, Aditya Taher, Tarmizi Susanti, Noni Karo Karo, Pulung Suprihatin Iman Supriyatna, Yayat Prasetyo, Erik Bahfie, Fathan Amin, Muhammad Syarifuddin, Hutwan Safitri, Hana Khairurrijal, Khairurrijal Department of Mining Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Research Center for Mining Technology National Research and Innovation Agency Lampung Indonesia Department of Material Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Department of Environmental Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Physics Department Universitas Lampung Lampung Indonesia Department of Environmental Science Postgraduate Program Universitas Jambi Jambi 36122 Indonesia Laboratory of Mine Environmental Department of Mining Engineering Institut Teknologi Sumatera Lampung-35365 Indonesia Department of Physics Institut Teknologi Sumatera Lampung-36365 Indonesia Department of Physics Institut Teknologi Bandung Bandung 40132 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Indonesia

Hard water is one of crucial problems in the world due to its pollutant parameters. Adsorption is a promising method for treating hard water because of its benefits such as low-cost, easy to use, acceptable, and easy to maintenance. In this study, we utilized zeolite functionalized with silicon/aluminum (Ze-Si/Al) as adsorbent materials for hard water treatment. Ten different ratios of Si/Al were added into zeolite by modifying the solid waste source concentration (pumice and cans). The optimum sample was then further tested with different parameters including contact time, dye concentration, and isotherm models. The zeolite-Si/Al adsorbent was characterized by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Results of this study have showed that the best functionalized zeolite was that with Si/Al ratio 0.67, which has higher sorption ability. In contact time test, the equilibrium was reached after 300 min. This study also informed that the concentration of dyes will give impact on removal of pollutant parameters. Isotherm model of Ze-Si/Al fitted with Langmuir method. This study also discussed the potential development and future research direction. Thus, this study is a crucial report to develop the information about waste utilization as source of Si/Al to increasing quality of zeolite. © 2023 Elsevier B.V.

关键词： Adsorption Hard water Wastewater Wastewater treatment zeolite-Si/Al

来源：评论

学校读者我要写书评

暂无评论

Fabrication of silica-nypa membrane applied for water desalination

引用

AIP Conference Proceedings 2024年第1期2710卷

作者： Muthia Elma Isna Syauqiah Era N. R. Oktaviana Siti Fatimah Aulia Rahma Awali Sir Kautsar Harivram Erdina L. A Rampun Chemical Engineering Department Engineering Faculty Lambung Mangkurat University JL. A. Yani KM 36 Banjarbaru South Kalimantan 70714 Indonesia Materials and Membranes Research Group (M2ReG) Lambung Mangkurat University JL. A.Yani KM 36 Banjarbaru South Kalimantan 70714 Indonesia Doctoral Program of Environmental Science postgraduate Program Lambung Mangkurat University Jl. Brigjen H Hasan Basri Kayutangi Banjarmasin South Kalimantan 70123 Indonesia

Carbon source as a template derived from nypa leaf powder enable to strengthen the silica matrix applied for water desalination. This research aims to synthesize silica-nypa membrane, characterize xerogel silica-nypa leaf and investigate the performance of silica-nypa membrane with various concentration of nypa as a carbon template to treat artificial sea water. The concentrations of nypa leaf as a carbon template are 0.1; 0.5 and 2.5 %wt with a calcination temperature of 350 °C through a rapid thermal processing (RTP) technique. Xerogel characterization using FTIR was employed to analyze a spectrum and Scanning Electron Microscopy (SEM) to investigate the membrane morphology. The result shows that the performance of silica-nypa membrane with water fluxes of 2.1915; 2.0163 and 1.1067 kg.m−2. h−1 (for 0.1; 0.5 and 2.5 %wt. carbon template derived from nypa leaf), and the salt rejection value for all concentrations.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：