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enhancing MXene-based supercapacitors:Role of synthesis and 3D architectures

Journal of energy chemistry 2024年第4期91卷 1-26页

作者： wen Siong Poh wen Jie yiang Wee-Jun Ong Pau Loke Show chuan yi Foo School of energy and chemical engineering Xiamen University MalaysiaSelangor Darul EhsanMalaysia&College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Kelip-kelip!center of Excellence for Light enabling Technologies Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia center of Excellence for NaNo energy&catalysis Technology(cONNEcT) Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia Department of chemical engineering Khalifa UniversityShakhbout Bin Sultan St-Zone 1Abu DhabiUnited Arab Emirates Zhejiang Provincial Key Laboratory for Subtropical Water environment and Marine Biological Resources Protection Wenzhou UniversityWenzhou 325035ZhejiangChina Department of chemical and environmental engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaJalan Broga43500 SemenyihSelangor Darul EhsanMalaysia Department of Sustainable engineering Saveetha School of EngineeringSIMATSChennai 602105India

MXene has been the limelight for studies on electrode active materials,aiming at developing supercapacitors with boosted energy density to meet the emerging influx of wearable and portable electronic *** its various desirable properties including intrinsic flexibility,high specific surface area,excellent metallic conductivity and unique abundance of surface functionalities,its full potential for electrochemical performance is hindered by the notorious restacking phenomenon of MXene *** to its two-dimensional(2D)nature and surface functional groups,inevitable Van der Waals interactions drive the agglomeration of nanosheets,ultimately reducing the exposure of electrochemically active sites to the electrolyte,as well as severely lengthening electrolyte ion transport *** a result,energy and power density deteriorate,limiting the application versatility of MXene-based *** 3D architectures using 2D nanosheets presents as a straightforward yet ingenious approach to mitigate the fatal flaws of ***,the sheer number of distinct methodologies reported,thus far,calls for a systematic review that unravels the rationale behind such 3D MXene structural ***,this review aims to serve this purpose while also scrutinizing the structure–property relationship to correlate such structural modifications to their ensuing electrochemical performance ***,the physicochemical properties of MXene play fundamental roles in determining the effective charge storage capabilities of 3D MXene-based *** largely depends on different MXene synthesis techniques and synthesis condition variations,hence,elucidated in this review as ***,the challenges and perspectives for achieving viable commercialization of MXene-based supercapacitor electrodes are highlighted.

关键词： MXene 3D architectures Synthesis design Supercapacitor energy storage

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On-chip topological nanophotonic devices

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chip 2022年第4期1卷 1-21页

作者： cui-cui Lu Hong-yi Yuan Hong-Yu Zhang wen Zhao Nian-en Zhang Yan-Ji Zheng Sayed Elshahat Yong-chun Liu Key Laboratory of Advanced Optoelectronic Quantum Architecture and Mea-surements of Ministry of Education Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsFrontier Science Center for Quantum InformationTsinghua UniversityBeijing 100084China

On-chip topological nanophotonic devices,which take photons as in-formation carriers with topological protection during light propaga-tion,have great application potential in the next generation photonic *** topological photonic states enable the nanophotonic de-vices to be robust and stable,immune to scattering even with imper-fect *** development,opportunities and challenges of the on-chip topological nanophotonic devices have attracted great atten-tion of scholars,and desired to be *** this review,topologi-cal devices were introduced in the order of functionalities on an in-tegrated photonic chip,*** light source,topological light waveguiding,topological light division and selection,topological light manipulation and topological light ***,we gave out-looks for predicting and promoting the performances of on-chip topo-logical nanophotonic devices from the angles of non-Hermitian sys-tems,non-Abelian topology,metasurfaces,intelligent algorithms and multiple functional topological nanophotonic *** review provides rich knowledge about on-chip topological nanophotonic *** insights in this paper will spark inspiration and inspire new thinking for the realization of topological photonic chips.

关键词： Topological photonics Nanophotonic devices Photonic chip

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Postoperative retroperitoneal desmoid tumor mimics recurrent gastrointestinal stromal tumor:A case report

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World Journal of Gastroenterology 2012年第42期18卷 6172-6176页

作者： Liang-Yu Shih chang-Kuo Wei chih-wen Lin chih-en Tseng Department of Anatomic Pathology BuddhistDalin Tzu Chi General Hospital Chiayi 62247 Taiwan Department of General Surgery BuddhistDalin Tzu Chi General Hospital Chiayi 62247 Taiwan Department of Medical Imaging Buddhist Da-lin Tzu Chi General Hospital Chiayi 62247 Taiwan School of Medicine Buddhist Tzu Chi Uni-versity Hualien 97004 Taiwan

Desmoid tumor is a locally invasive,myofibroblastic,nonmetastatic *** pathogenesis remains unclear and it may involve genetic abnormalities,sex hormones and traumatic injury,including *** intra-abdominal desmoid tumor is rare,especially in the *** report a case of postoperative retroperitoneal desmoid tumor that developed 29 mo after the first excision of a gastrointestinal stromal *** trauma-related intraabdominal desmoid tumors reported in the english literature are also *** an extremely low incidence,postoperative desmoid tumor should be considered in the differential diagnosis when a recurrent neoplasm is found at least one year after ***,it is a clinical challenge to distinguish recurrent malignant neoplasms from desmoid tumors,and surgical resection is the treatment option depending on the anatomic location.

关键词： Desmoid tumor Gastrointestinal stromal tumor Recurrence Retroperitoneum Surgery

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Rational distribution of Ru nanodots on 2D Ti_(3−x)c_(2)T_(y)/g-c_(3)N_(4)heterostructures for boosted photocatalytic H_(2)evolution

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Nano Research 2023年第5期16卷 6652-6660页

作者： wen-Jing yi Xin Du Meng Zhang Sha-Sha yi Rui-Hao Xia chuan-Qi Li Yan Liu Zhong-yi Liu wen-Lei Zhang Xin-Zheng Yue college of chemistry Zhengzhou UniversityZhengzhou 450001China School of Materials Sc.ence and engineering Zhengzhou UniversityZhengzhou 450001China

Incorporating metal nanodots(NDs)into heterostructures for high charge separation and transfer capacities is one of the most effective strategies for improving their photocatalytic ***,controlling the space distribution of metal NDs for optimizing charge transport pathways remains a significant challenge,particularly in two-dimensional(2D)face-to-face ***,we develop a simple targeted self-reduction strategy for selectively loading Ru NDs onto the Ti_(3−x)c_(2)T_(y)(Tc)surface of 2D Tc/g-c_(3)N_(4)(cN)heterojunction based on the reductive Ti vacancy defects creatively increased during the preparation of Tc/cN by reducing ***,the optimized Ru/Tc/cN photocatalyst exhibits an outstanding H_(2)evolution rate of 3.21 mmol·g^(−1)·h^(−1)and a high apparent quantum effic.ency of 30.9%at 380 nm,which is contributed by the unidirectional transfer of the photogenerated electrons from cN to Ru active sites(cN→Tc→Ru)and the suppressed backflow of electrons from Ru sites to cN,as revealed by comprehensive characterizations and density functional theory(DFT)*** work provides a novel strategy for synthesizing the highly effic.ent photocatalysts with a controllable charge transfer paths,which will boost the development of photocatalysis.

关键词： Ru/Ti_(3−x)c_(2)T_(y)/g-c_(3)N_(4) targeted self-reduction strategy selective growth unidirectional electron migration photocatalytic H_(2)evolution

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constitutive Modeling for Flow Behaviors of Superaustenitic Stainless Steel S32654 during Hot Deformation

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Journal of Iron and Steel Research International 2016年第2期23卷 178-184页

作者： en-xiang PU Han FenG Min LIU wen-jie ZHenG Han DONG Zhi-gang SONG central Iron and Steel Research Institute Beijing 100081China School of Materials Sc.ence and engineering Tsinghua UniversityBeijing 100084China

Hot deformation behavior of superaustenitic stainless steel S32654 was investigated with hot compression tests at temperatures of 950-1250 c and strain rates of 0. 001-10 s-1. Above 1150 ℃, with strain rate lower than 0.1 s -1 , the flow curves exhibit nearly steady state behavior, while at higher strain rate, continuous flow softening occurs. To provide a precise prediction of flow behavior for the alloy, the constitutive modeling considering effect of strain was derived on the basis of the obtained experimental data and constitutive relationship which incorporated Ar- rhenius term and hyperbolic sine type equation. The material constants α, n, Q and lnA are found to be functions of the strain and can be fitted employing eighth-order polynomial. The developed constitutive model can be employed to describe the deformation behavior of superaustenitic stainless steel S32654.

关键词： S32654 superaustenitic stainless steel hot deformation constitutive modeling

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Optical Remote-sensing Monitoring and Forecasting of Atmospheric Pollution in Huaibei Area, china

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chinese Journal of chemical Physics 2012年第6期25卷 739-742,I0004页

作者： Su-wen Li Pin-hua Xie en-hua Jiang Yong Zhang Hai-feng Dai college of Physics and Electronic Information Huaibei Normal University Huaibei 235000 China Hefei lnstitutes of Physical Sc.ence Chinese Academy of Sciences Hefei 230031 China

Huaibei is an energy city. coal as the primary energy consumption brings a large number of regional pollution in Huaibei area. Differential optical absorption spectroscopy （DOAS） as optical remote sensing technology has been applied to monitor regional average concen- trations and inventory of nitrogen dioxide, sulfur dioxide and ozone. DOAS system was set up and applied to monitor the main air pollutants in Huaibei area. Monitoring data were obtained from 7 to 28 August, 2011. Monitoring results show measurements in controlling pollution are effective, and emissions of pollutants are up to the national standard in Huaibei area. Prediction model was also created to track changing trend of pollutions. These will provide raw data support for effective evaluation of environmental quality in Huaibei area.

关键词： Optical remote sensing Atmospheric pollution Huaibei area Monitoring Forecasting

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Proportional directional valve based automatic steering system for tractors

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Frontiers of Information Technology & Electronic.engineering 2016年第5期17卷 458-464页

作者： Jin-yi LIU Jing-quan TAN en-rong MAO Zheng-he SONG Zhong-xiang ZHU Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment China Agricultural University

Most automatic steering systems for large tractors are designed with hydraulic systems that run on either constant flow or constant pressure. Such designs are limited in adaptability and applicability. Moreover, their control valves can unload in the neutral position and eventually lead to serious hydraulic leakage over long operation periods. In response to the problems noted above, a multifunctional automatic hydraulic steering circuit is presented. The system design is composed of a 5-way-3-position proportional directional valve, two pilot-controlled check valves, a pressure-compensated directional valve, a pressurecompensated flow regulator valve, a load shuttle valve, and a check valve, among other components. It is adaptable to most open-center systems with constant flow supply and closed-center systems with load feedback. The design maintains the lowest pressure under load feedback and stays at the neutral position during unloading, thus meeting the requirements for steering. The steering controller is based on proportional-integral-derivative(PID) running on a 51-microcontroller-unit master control chip. An experimental platform is developed to establish the basic characteristics of the system subject to stepwise inputs and sinusoidal tracking. Test results show that the system design demonstrates excellent control accuracy, fast response, and negligible leak during long operation periods.

关键词： Automatic steering system Hydraulic circuit Proportional directional valve Proportional-integral-derivative(PID) control

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endoscopic findings in a patient with Henoch-Schonlein purpura

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World Journal of Gastroenterology 2005年第15期11卷 2354-2356页

作者： Ming-Jen c.en Tsang-en Wang wen-Hsiung chang Shu-Jung Tsai Division of Gastroenterology

Henoch-Schonlein purpura (HSP) is a systemic vasculitis of the small vessels of the skin, joints, GI tract, and kidney. It preferentially affects children but may also occur in adults. We report a 60-year-old man with HSP who presented with colicky abdominal pain, bloody diarrhea, arthralgia, and skin rash. The gastrointestinal tract was viewed by upper endoscopy and colonoscopy. We found characteristic.endoscopic findings in the stomach, cecum and sigmoid colon, the combination of which has rarely been demonstrated in one patient. Histologic examination of skin biopsy specimens revealed leukocytoclastic vasculitis with positive staining for IgA in the capillaries. endoscopy appears to have substantial diagnostic utility in patients suspected of having HSP, especially when abdominal symptoms precede the cutaneous lesions.

关键词： Henoch-Schonlein purpura Purpura endoscopy

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Phylogeny of Limenitidinae Butterflies (Lepidoptera: Nymphalidae) Inferred from Mitochondrial cytochrome Oxidase I Gene Sequences

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Agricultural Sc.ences in china 2011年第4期10卷 566-575页

作者： ZHANG Min cAO Tian-wen ZHONG Yang GUO Ya-ping MA en-bo Research Institute of Applied Biology Shanxi University Taiyuan 030006 P.R.China Institute of Plant Protection Shanxi Academy of Agricultural Sciences Taiyuan 030031 P.R.China School of Life Sc.ences Fudan University Shanghai 200433 P.R.China

The phylogenetic analyses of the subfamily Limenitidinae are performed based on 1 471 bp of mtDNA cytochrome oxidase subunit I （cOI） gene sequence data which were obtained from 21 individuals spanning 9 genera, along with those of 17 species obtained from GenBank, using Apatura iris, Aglais urticae, and Polyura dolon as outgroup species. Although the transitions at the third codon positions of the cOI data set were highly saturated, they were still retained for analysis as they contain the majority of the phylogenetic information, and thus, the maximum pasimony （MP） under different weighting schemes and maximum likelihood （ML） trees were reconstructed in this study. The results showed that within this subfamily, the results based on the cOI gene sequences are approximately identical to the traditional classification results. However, the clustering of Lexias pardalis and Tanaecia julii within the genus Euthalia as well as the clustering of Phaedyma aspasia within the genus Neptis with weak support are different from that of the current classification scheme made by chinese scholars. The genus Limenitis is splited into two subclusters in the trees constructed by using MP and ML methods. These results support one of the strongest hypotheses for the tribe relationships within Limenitidinae.

关键词： Nymphalidae Limenitidinae mtDNA molecular phylogeny cytochrome oxidase I gene

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Orientations of Rare-earth-containing Heteropolyoxometalates with Different Sizes in the Interlayer of Synthetic Multibilayer Films

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chinese chemical Letters 2002年第9期13卷 887-890页

作者： Yong Hui WANG Xin Long WANG chang wen HU en Bo WANG Institute of Polyoxometalate chemistry Faculty of ChemistryNortheast Normal UniversityChangchun 130024

Three rare-earth-containing heteropolyoxometalates with different sizes, Na9[Eu(W5 O18)2], K13[Eu(SiW11O39)2], and K17[Eu(P2W17O61)2], have been incorporated by self-assembly into the interlayer of synthetic multibila... 详细信息

关键词： Rare-earth-containing heteropolyoxometalate synthetic multibilayer film DODA orientation.

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