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Plasma-enhanced interfacial engineering of FeSiAl@PUA@SiO_(2)hybrid for efficient microwave absorption and anti-corrosion

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Nano Research 2023年第1期16卷 645-653页

作者： Hongyan Zhang Feng Cao Hui Xu Wei Tian Ying Pan nasir mahmood Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Department of Engineering Technology Huzhou CollegeHuzhou 313000China School of Science RMIT UniversityMelbourneVIC 3001Australia

Microwave absorption materials are prone to degradation in extremely humid and salty environments,and it is still challenging to develop a dense and firm interface to protect microwave ***,a robust FeSiAl@PUA@SiO2(PUA:acrylic polyurethane)gradient hybrid was prepared through plasma-enhanced chemical vapor deposition(PECVD)to achieve efficient microwave absorption and anti-corrosion *** organic/inorganic dual coat of PUA/SiO2 not only facilitated the interface polarization but also effectively reduced the dielectric constant and optimized impedance *** to the unique hybrid structure,the(PECVD-FeSiAl@PUA)@SiO_(2) exhibited highly efficient microwave absorbing performance in frequency bands covering almost the entire Ku-bands(12-18 GHz)with a minimum reflection loss(RLmin)of−47 dB with a matching thickness of 2.3 *** organic/inorganic dual protection effectively shields against the corrosive medium,as the corrosion potential and the polarization resistance increased from−0.167 to−0.047 V and 8,064 to 16,273Ω·cm^(2),*** the corrosion current decreased from 3.04×10^(−6) to 2.16×10^(−6) A/cm^(2).Hence,the plasma-enhanced densification of PUA created a strong bridge to integrate FeSiAl and organic/inorganic components acquiring dual-function of efficient microwave absorption and anticorrosion,which opened a promising platform for potential practical absorbers.

关键词： FeSiAl polyurethane acrylic inorganic/organic interface microwave absorption anti-corrosion

Flexible carbon fiber-based composites for electromagnetic interference shielding

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Rare Metals 2022年第11期41卷 3612-3629页

作者： Hong-Yan Zhang Jin-Yao Li Ying Pan Yi-Fan Liu nasir mahmood Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China RMIT University School of EngineeringMelbourneVic3001Australia

With the rapid development of electronic information technology,the waste electromagnetic radiation generated by the wireless and various other electronic devices has caused serious harm to human *** development of high-efficiency flexible electromagnetic interference(EMI)shielding materials has become one of the most effective ways to mitigate the increasingly serious problem of electromagnetic *** carbon fiber composites possess most of the physical requirements needed for EMI shielding applications,including high electrical conductivity,large specific surface area,light weight,flexibility,porous structure,and adjustable physical and chemical properties,and various morphology of carbon fibers-based composites applied *** this review,the primary EMI shielding mechanism of carbonfiber-based materials is *** carbon fiber suffers from a low absorption efficiency when used for EMI shielding by itself,it is usually combined with additional EMI filling ***,the methods of adding EMI filler materials to the carbon fiber framework and the influence of different fillers on the EMI shielding performance are also *** addition,the novel structural designs of flexible carbon fiber-based EMI shielding materials,including fiber orientation,core-shell structure,and multilayer heterostructure,are summarized in terms of their classification,which includes composites with metal,polymer,nano-carbon,and *** review concludes with a brief discussion of the challenges,research directions,and future prospects of carbon-fiber-based EMI shielding materials.

关键词： Carbon fibers Electromagnetic interference shielding Flexible Composites

Atomic-Scale Layer-by-Layer Deposition of Fe SiAl@ZnO@Al_(2)O_(3) Hybrid with Threshold Anti-Corrosion and Ultra-High Microwave Absorption Properties in Low-Frequency Bands

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Nano-Micro Letters 2021年第10期13卷 308-321页

作者： Wei Tian Jinyao Li Yifan Liu Rashad Ali Yang Guo Longjiang Deng nasir mahmood Xian Jian National Engineering Researching Centre of Electromagnetic Radiation Control Materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of Electronic Science and Engineering The Yangtze Delta Region Institute HuzhouUniversity of Electronic Science and Technology of ChinaHuzhou 313001People’s Republic of China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of Electrical and Information Engineering Panzhihua UniversityPanzhihua 617000People’s Republic of China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Developing highly efficient magnetic microwave absorb-ers(MAs)is crucial,and yet challenging for anti-corrosion properties in extremely humid and salt-induced foggy ***,a dual-oxide shell of ZnO/Al_(2)O_(3) as a robust barrier to FeSiAl core is introduced to mitigate corrosion *** FeSiAl@ZnO@Al_(2)O_(3) layer by layer hybrid structure is realized with atomic-scale precision through the atomic layer deposition *** to the unique hybrid structure,the FeSiAl@ZnO@Al_(2)O_(3) exhibits record-high micro-wave absorbing performance in low-frequency bands covering L and S bands with a minimum reflection loss(RLmin)of-50.6 dB at 3.4 *** with pure FeSiAl(RLmin of-13.5 dB,a bandwidth of 0.5 GHz),the RLmin value and effective bandwidth of this designed novel absorber increased up to~3.7 and~3 times,***-thermore,the inert ceramic dual-shells have improved 9.0 times the anti-corrosion property of FeSiAl core by multistage barriers towards corrosive medium and obstruction of the electric *** is attributed to the large charge transfer resistance,increased impedance modulus|Z|0.01 Hz,and frequency time constant of FeSiAl@ZnO@Al_(2)O_(3).The research demonstrates a promising platform toward the design of next-generation MAs with improved anti-corrosion properties.

关键词： Atomic layer deposition Magnetic alloy Dual-oxide-shells Microwave absorption Anti-corrosion

Biocompatibility of iron carbide and detection of metals ions signaling proteomic analysis via HPLC/ESl-Orbitrap

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Nano Research 2017年第6期10卷 1912-1923页

作者： Murtaza Hasan Wenlong Yang Yanmin Ju Xin Chu Yun Wang Yulin Deng nasir mahmood Yanglong Hou Department of Materials Science and Engineering College of Engineering Peking University Beijing 700871 China School of Life Sciences Beijing Institu te of Technology Beijing 100081 China

Recently, magnetic nanopartides （NPs） have been extensively used in food industry and biomedical treatments. However, the biocompatibility mechanism on expression proteomics, before consideration of magnetic NPs for clinical application, has not yet been fully elucidated. Therefore, this study was undertaken to identify potential biomarkers of metal ion signaling proteins in human cervical cancer cell line （HeLa） cells. Here, we report the in vitro investigations of the cell cycle response and significant changes in protein abundance of HeLa cells when exposed to self-tailored hydrophilic Fe2C NPs. The comparative proteomic approach based on 180 labeling coupled with high performance liquid chromatography/ electrospray ionization with ion trap mass analyzer （HPLC/ESI-Orbitrap） was applied, and 394 proteins were identified. There were 46 significantly differentiated proteins based on the specific metal ion signaling response. Among them, 60S ribosomal protein L37a, serine/arginine-rich splicing factor 7, calmodulin, and calumenin were downregulated, whereas transketolase was overexpressed. Functional interaction network of Fe2C-regulated proteins was successfully created by the STRING algorithm to show the strong interactions between proteins. This work will not only help to understand the molecular mechanism of metal ion signaling proteins that can potentially be used to develop therapeutic protocols for diagnosis of diseases but also give direction for tailoring biocompatible magnetic NPs.

关键词： biocompatibility,^18O labeling magnetic nanoparticles proteomic analysis

Recent Progress,Challenges,and Prospects in Two‑Dimensional Photo‑Catalyst Materials and Environmental Remediation

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Nano-Micro Letters 2020年第12期12卷 29-105页

作者： Karim Khan Ayesha Khan Tareen Muhammad Aslam Rizwan Ur Rehman Sagar Bin Zhang Weichun Huang Asif mahmood nasir mahmood Kishwar Khan Han Zhang Zhongyi Guo School of Electrical Engineering and Intelligentization Dongguan University of Technology(DGUT)Dongguan 523808GuangdongPeople’s Republic of China Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Government Degree College Paharpur Gomel UniversityDera Ismail KhanK.P.KIslamic Republic of Pakistan School of Materials Science and Engineering Jiangxi University of Science and TechnologyJiangxi 341000People’s Republic of China School of Chemical and Bio‑Molecular Engineering The University of SydneySydneyNSW 2006Australia School of Engineering The Royal Melbourne Institute of Technology(RMIT)UniversityMelbourneVICAustralia Research Laboratory of Electronics(RLE) Massachusetts Institute of Technology(MIT)CambridgeMAUSA

The successful photo-catalyst library gives significant information on feature that affects photo-catalytic performance and proposes new *** is considerably significant to form multi-functional photo-catalysts with flexible *** recently,two-dimensional materials(2DMs)gained much attention from researchers,due to their unique thickness-dependent uses,mainly for photo-catalytic,outstanding chemical and physical ***-catalytic water splitting and hydrogen(H2)evolution by plentiful compounds as electron(e−)donors is estimated to participate in constructing clean method for solar *** photocatalysis received much research attention caused by their applications to tackle numerous energy and environmental *** broad review explains progress regarding 2DMs,significance in structure,and catalytic *** will discuss in detail current progresses of approaches for adjusting 2DMs-based photo-catalysts to assess their photo-activity including doping,hetero-structure scheme,and functional formation *** plans,e.g.,doping and sensitization of semiconducting 2DMs,increasing electrical conductance,improving catalytic active sites,strengthening interface coupling in semiconductors(SCs)2DMs,forming nano-structures,building multi-junction nano-composites,increasing photo-stability of SCs,and using combined results of adapted approaches,are summed ***,to further improve 2DMs photo-catalyst properties,hetero-structure design-based 2DMs’photo-catalyst basic mechanism is also reviewed.

关键词： Two-dimensional materials Photo-catalysts H2O2/H2-production Pollutant degradation CO2 reduction

Mining Software Repository for Cleaning Bugs Using Data Mining Technique

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Computers, Materials & Continua 2021年第10期69卷 873-893页

作者： nasir mahmood Yaser Hafeez Khalid Iqbal Shariq Hussain Muhammad Aqib Muhammad Jamal Oh-Young Song University Institute of Information Technology Pir Mehr Ali Shah Arid Agriculture UniversityRawalpindi46000Pakistan Department of Computer Science COMSATS University IslamabadAttock CampusAttock43600Pakistan Department of Software Engineering Foundation University IslamabadIslamabad44000Pakistan Department of Mathematics and Statistics Pir Mehr Ali Shah Arid Agriculture UniversityRawalpindi46000Pakistan Department of Software Sejong UniversitySeoul05006Korea

Despite advances in technological complexity and efforts,software repository maintenance requires reusing the data to reduce the effort and ***,increasing ambiguity,irrelevance,and bugs while extracting similar data during software development generate a large amount of data from those data that reside in ***,there is a need for a repository mining technique for relevant and bug-free data *** paper proposes a fault prediction approach using a data-mining technique to find good predictors for high-quality *** predict errors in mining data,the Apriori algorithm was used to discover association rules by fixing confidence at more than 40%and support at least 30%.The pruning strategy was adopted based on evaluation ***,the rules were extracted from three projects of different domains;the extracted rules were then combined to obtain the most popular rules based on the evaluation measure *** evaluate the proposed approach,we conducted an experimental study to compare the proposed rules with existing ones using four different industrial *** evaluation showed that the results of our proposal are *** and developers can utilize these rules for defect prediction during early software development.

关键词： Fault prediction association rule data mining frequent pattern mining

Microporous bamboo biochar for lithium-sulfur batteries

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Nano Research 2015年第1期8卷 129-139页

作者： Xingxing Gu Yazhou Wang Chao Lai Jingxia Qiu Sheng Li Yanglong Hou Wayde Martens nasir mahmood Shanqing Zhang Centre for Clean Environment and Energy Environmental Futures Research Institute Griffith School of Environment Gold Coast Campus Griffith University QLD 4222 Australia Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Science and Engineering Faculty Queensland University of Technology QLD 4001 Australia

Being simple, inexpensive, scalable and environmentally friendly, microporous biomass biochars have been attracting enthusiastic attention for application in lithium-sulfur （Li-S） batteries. Herein, porous bamboo biochar is activated via a KOH/annealing process that creates a microporous structure, boosts surface area and enhances electronic conductivity. The treated sample is used to encapsulate sulfur to prepare a microporous bamboo carbon-sulfur （BC-S） nanocomposite for use as the cathode for Li-S batteries for the first time. The BC-S nanocomposite with 50 wt.% sulfur content delivers a high initial capacity of 1,295 mA-h/g at a low discharge rate of 160 mA/g and high capacity retention of 550 mA-h/g after 150 cycles at a high discharge rate of 800 mA/g with excellent coulombic efficiency （995%）. This suggests that the BC-S nanocomposite could be a promising cathode material for Li-S batteries.

关键词： biochars lithium-sulfur batteries microporous structure bamboo carbon-sulfur composites

Strain-regulated sensing properties of α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers for ethanol detection

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Journal of Materials Science & Technology 2021年第9期68卷 132-139页

作者： Huajing Xiong Jianan Fu Jinyao Li Rashad Ali Hong Wang Yifan Liu Hua Su Yuanxun Li Woon-Ming Lau nasir mahmood Chunhong Mu Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Chemistry National Institute of Measurement and Testing Technology of ChinaChengdu 610021China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Jiangxi Guo Chuang Industrial Park Development Co. LtdGanzhou 341000China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054China School of Engineering RMIT University124 La Trobe Street3001 MelbourneVictoriaAustralia National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 611731China

The sensitivity of ethanol sensor is of paramount importance in a variety of areas,including chemical production with ethanol,alcohol testing for driving safety,***,α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers are synthesized,for the first time,through in-situ catalytic chemical vapor deposition combined with hydrothermal techniques for the detection of *** reported α-Fe_(2)O_(3)@C nano-cylinders with double surficial strain effects deliver an ethanol detection sensitivity of 8 times as compared with α-Fe_(2)O_(3) nano-cylinders,10 times higher as compared with its detection sensitivity to ammonia,para-xylene,methanol and *** sensor also exhibits over-14-day operation stability and the minimum detection limit of 10 *** our best knowledge,the performances surpass those of previously reported α-Fe_(2)O_(3).Such attractive performances are attributed to the enhanced charge transfer in α-Fe_(2)O_(3) owing to the double surficial strain effects of α-Fe_(2)O_(3)@C nano-cylinders and the efficient adsorption of ethanol with atomic carbon layers.

关键词： Gas sensor Nano-cylinder Hybrid microstructure Sensitivity Carbon coating

Bifunctional catalysts of Co3O4@GCN tubular nanostructured （TNS） hybrids for oxygen and hydrogen evolution reactions

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Nano Research 2015年第11期8卷 3725-3736页

作者： Muhammad Tahir nasir mahmood Xiaoxue Zhang Tariq mahmood Faheem. K. Butt Imran Aslam M.Tanveer Faryal Idrees Syed Khalid Imran Shakir Yiming Yan Jijun Zou Chuanbao Cao Yanglong Hou Research Centre of Materials Science Beijing Institute of Technology Beijing 100081 China Department of Materials Science and Engineering Peldng University Beijing 100081 China Beijing Key Laboratory for Chemical Power Source and Green Catalyst School of Chemical Engineering and Environment Beijing Institution of Technology Beijing 100081 China Sustainable Energy Technologies (SET) center building No 3 Room 1c23 College of Engineering King Saud University PO BOX 800 Riyadh 11421 Kingdom of Saudi Arabia Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and Technology Tianjin University Collaborative Innovative Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China

Catalysts for oxygen and hydrogen evolution reactions （OER/HER） are at the heart of renewable green energy sources such as water splitting. Although incredible efforts have been made to develop efficient catalysts for OER and HER, great challenges still remain in the development of bifunctional catalysts. Here, we report a novel hybrid of Co3O4 embedded in tubular nanostructures of graphitic carbon nitride （GCN） and synthesized through a facile, large-scale chemical method at low temperature. Strong synergistic effects between Co3O4 and GCN resulted in excellent performance as a bifunctional catalyst for OER and HER. The high surface area, unique tubular nanostructure, and composition of the hybrid made all redox sites easily available for catalysis and provided faster ionic and electronic conduction. The Co3O4@GCN tubular nanostructured （TNS） hybrid exhibited the lowest overpotential （0.12 V） and excellent current density （147 mA/cm^2） in OER, better than benchmarks IrO2 and RuO2, and with superior durability in alkaline media. Furthermore, the Co3O4@GCN TNS hybrid demonstrated excellent performance in HER, with a much lower onset and overpotential, and a stable current density. It is expected that the Co3O4@GCN TNS hybrid developed in this study will be an attractive alternative to noble metals catalysts in large scale water splitting and fuel cells.

关键词： carbon nitride cobalt oxide bifunctional catalyst oxygen evolution reaction hydrogen evolution reaction