检索结果-南通市图书馆

Recent Advancements on Photothermal Conversion and Antibacterial Applications over MXenes-Based Materials

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第11期14卷 107-142页

作者： Shuyan Hao Hecheng Han Zhengyi Yang Mengting Chen Yanyan Jiang Guixia Lu Lun Dong Hongling Wen Hui Li Jiurong Liu Lili Wu Zhou wang fenglong wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061People’s Republic of China Department of Virology School of Public HealthShandong UniversityJinan 250012People’s Republic of China Shenzhen Research Institute of Shandong University A301 Virtual University Park in South District of Nanshan High-Tech ZoneShenzhen 518057People’s Republic of China School of Civil Engineering Qingdao University of TechnologyQingdao 266033People’s Republic of China Department of Breast Surgery Qilu HospitalShandong UniversityJinan 250012People’s Republic of China

The pernicious bacterial proliferation and emergence of super-resistant bacteria have already posed a great threat to public health,which drives researchers to develop antibiotic-free strategies to eradicate these fierce *** enormous achievements have already been achieved,it remains an arduous challenge to realize efficient sterilization to cut off the drug resistance ***,photothermal therapy(PTT)has emerged as a promising solution to efficiently damage the integrity of pathogenic bacteria based on hyperthermia beyond their *** now,numerous photothermal agents have been studied for antimicrobial *** them,MXenes(a type of two-dimensional transition metal carbides or nitrides)are extensively investigated as one of the most promising candidates due to their high aspect ratio,atomic-thin thickness,excellent photothermal performance,low cytotoxicity,and ultrahigh dispersibility in aqueous ***,the enormous application scenarios using their antibacterial properties can be tailored via elaborated designs of MXenes-based *** this review,the synthetic approaches and textural properties of MXenes have been systematically presented first,and then the photothermal properties and sterilization mechanisms using MXenes-based materials are ***,recent progress in diverse fields making use of the photothermal and antibacterial performances of MXenes-based materials are well summarized to reveal the potential applications of these materials for various purposes,including in vitro and in vivo sterilization,solar water evaporation and purification,and flexible antibacterial *** but not least,the current challenges and future perspectives are discussed to provide theoretical guidance for the fabrication of efficient antimicrobial systems using MXenes.

关键词： MXenes Antibacterial mechanisms Photothermal properties Antibacterial applications

基于自燃对流与三维平板大攻角绕流模型的纸螺旋动力扭矩研究

在线全文

学校读者我要写书评

暂无评论

物理与工程 2024年第4期34卷 183-190+198页

作者：石嘉舜刘振宇周子翔王凤龙徐春龙长安大学理学院长安大学工程机械学院

本文以蜡烛自燃空气对流与平板大攻角绕流为理论基础，对2022年青年物理学家锦标赛(IYPT2022)设计题“蜡烛动力涡旋机”(Candle Powered Turbine)针对性地开展了理论分析、实验研究和数值模拟分析。本文根据蜡烛燃烧的纹影法图像对蜡烛... 详细信息

本文以蜡烛自燃空气对流与平板大攻角绕流为理论基础，对2022年青年物理学家锦标赛(IYPT2022)设计题“蜡烛动力涡旋机”(Candle Powered Turbine)针对性地开展了理论分析、实验研究和数值模拟分析。本文根据蜡烛燃烧的纹影法图像对蜡烛流场进行简化，建立了蜡烛自燃空气对流模型，并将平板大攻角绕流模型进行推广应用，得到了纸螺旋在蜡烛流场中所受扭矩的理论公式；通过实验探究了环带宽度、轴向倾角对纸螺旋扭矩的影响规律，并获得了最优化参数；对最优化装置进行了CFD数值仿真分析和实验研究，仿真结果和实验结果较好地吻合，验证了本文所提出的纸螺旋在蜡烛燃烧形成的空气对流场中运动的扭矩理论的准确性。本文的贡献是，把燃料燃烧形成的自然对流作为动力应用在旋转装置，对余能利用具有潜在的应用价值；三维平板大攻角绕流模型的建立为雷诺数在10～4～10～6范围内时三维平板类大攻角低速绕流的总压力计算提供了简便的计算方法。

关键词：平板绕流大攻角绕流总压力自然对流

Shining light on transition metal sulfides:New choices as highly efficient antibacterial agents

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2021年第8期14卷 2512-2534页

作者： Hecheng Han Jingjing Yang Xiaoyan Li Yuan Qi Zhengyi Yang Zejun Han Yanyan Jiang Martina Stenzel Hui Li Yixin Yin Yi Du Jiurong Liu fenglong wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China Department of Endodontics School and Hospital of StomatologyCheeloo College of Medicine&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationShandong UniversityJinan 250012China Suzhou Institute of Shandong University Suzhou 215123China ShenZhen Research Institute of Shandong University Shenzhen 518057China School of Chemistry University of New South WalesSydneyNSW 2052Australia Oral Implantology Center Jinan Stomatology HospitalJinan 250001China

Globally,millions of people die of microbial infection-related diseases every *** more terrible situation is that due to the overuse of antibiotics,especially in developing countries,people are struggling to fight with the bacteria *** emergence of super-bacteria will be an intractable environmental and health hazard in the future unless novel bactericidal weapons are ***,it is critical to develop viable antibacterial approaches to sustain the prosperous development of human *** researches indicate that transition metal sulfides(TMSs)represent prominent bactericidal application potential owing to the meritorious antibacterial performance,acceptable biocompatibility,high solar energy utilization efficiency,and excellent photo-to-thermal conversion characteristics,and thus,a comprehensive review on the recent advances in this area would be beneficial for the future *** this review article,we start with the antibacterial mechanisms of TMSs to provide a preliminary ***,the state-of-the-art research progresses on the strategies for TMSs materials engineering so as to promote their antibacterial properties are systematically surveyed and summarized,followed by a summary of the practical application scenarios of TMSs-based antibacterial ***,based on the thorough survey and analysis,we emphasize the challenges and future development trends in this area.

关键词： antibacterial mechanisms transition metal sulfides surface functionalization strain-selective bactericidal strategies metabolism and toxicology

One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ChemPhysMater 2023年第4期2卷 337-345页

作者： Wenjing Du Jinbo Zhao fenglong wang Huan Yang Ling Chen Xingyu Yao Lili Wu Jiurong Liu College of Materials Engineering Henan Key Laboratory of Electronic Ceramics Materials and ApplicationHenan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of EngineeringZhengzhou 451191China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250100China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of School of Materials Science and EngineeringShandong UniversityJinan 250061China Department of Chemical Engineering and Safety Binzhou UniversityBinzhou 256600China

In this study we report,for the first time,the synthesis of Co-doped NiO microspheres assembled by two-dimension nanosheets using a facile solvothermal *** H 2 S gas-sensing performance of the as-prepared samples was systematically *** result demonstrates that the Co–NiO sensor with Co/Ni molar ratio of 1%(1%Co–NiO)exhibits high response(12.9)and rapid response speed(110 s)to 20×10^(−6) H_(2)S at 200℃ in comparison with the pure NiO ***,excellent selectivity,repeatability,and stability were *** sensing mechanism illustrates that the superior gas-sensing properties can be attributed to two factors.(1)The hierarchical microspherical construction with an ultrahigh specific surface area of 163.1 m^(2)g^(−1) provides adequate active sites for H_(2)S gas adsorption,porous structures,and an interlayer gap that accelerates the diffusion of H_(2)S gas,resulting in improved sensitivity and response speed of the sensor.(2)Co-doping results in a decrease in the particle sizes(ca.4 nm)and increase in the number of adsorbed ionized oxygen species,which improves sensitivity and ***,this study provides a facile approach for the synthesis of hierarchical Co–NiO microspheres with enhanced H_(2)S gas-sensing performance.

关键词： Co-doped NiO Gas sensor Hierarchical microspheres Hydrogen sulfide

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

行为地理学的学科特色与拓展路径

地理科学进展 2022年第1期41卷 16-26页

作者：王丰龙华南师范大学地理科学学院/行政区划与空间治理研究中心广州510631 中国行政区划研究中心/华东师范大学中国现代城市研究中心上海200062

行为地理学是人文地理学的一门重要的分支学科,因其独特的分析视角和对人地关系的深入阐释而在20世纪70年代快速发展。但是,目前缺少关于行为地理学学科框架的系统界定,对于行为地理学在人文地理学中的独特性和学科分工的讨论尚不够深入... 详细信息

行为地理学是人文地理学的一门重要的分支学科,因其独特的分析视角和对人地关系的深入阐释而在20世纪70年代快速发展。但是,目前缺少关于行为地理学学科框架的系统界定,对于行为地理学在人文地理学中的独特性和学科分工的讨论尚不够深入,这既不利于人文地理学其他子学科的研究者正确认识行为地理学研究的价值,也不利于行为地理学者之间凝聚共识、构建学术共同体。恰逢中国行为地理学专业委员会成立之际,论文尝试进一步厘清行为地理学的学科特色与定位,在回应当前行为地理学面临的一些学科属性和理论路径选择方面的困惑的基础上,指出行为地理学的一些拓展路径。行为地理学兼具研究对象和研究方法论的定位,其核心价值在于提供了理解人地关系的个体视角、主观视角和过程视角;未来行为地理学应该在坚持自身特色的基础上,立足尺度理论推动微观尺度研究与宏观尺度研究的对话整合,进一步拓展对行为的心理机制解释和相关因果机制的检验,并立足中国的地理背景加强中国行为地理学研究的原创性和应用价值。期待更多学者积极投身行为地理学研究之中,共同推动中国行为地理学的发展。

关键词：行为地理学心理学尺度过程学科特色中国学派

Scour and silting evolution and its influencing factors in Inner Mongolian Reach of the Yellow River

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2011年第6期21卷 1037-1046页

作者： QIN Yi ZHANG Xiaofang wang fenglong YAN Heng HAN Haijun Key Laboratory of North-West Water Resources and Ecology Environment of Ministry of Education Xi＇an University of Technology Xi＇an 710048 China Zhoushan Water Conservancy Survey and Design Institute Zhoushan 316000 Zhejiang China Harbin Water Conservancy Plan and Design Institute Harbin 150076 China

Rivers with fluvial equilibrium are characterized by bed deformation adjustment. The erosion-deposition area in cross-section reflects this characteristic, which is a base of researching the river scour and deposition evolution by time series analysis. With an ero- sion-deposition area indicator method proposed in this paper, the time series of ero- sion-deposition area quantity at Bygl and Shhk stations were obtained with the series duration of 31 years from 1976 to 2006. After analysis of its trend and mutation, three different ten- dencies about the evolution were observed in general from the quasi-equilibrium phase through a rapid shrinkage to the final new quasi-equilibrium. It is also found that the trend of erosion-deposition area series will change once a big flood occurred in some of the tributaries and its ever greater influence is due to the decrease of deluge with the completion of up- stream reservoirs. Almost all the turning points were coincident with the time when hy- per-concentrated sediment flood occurred in some tributaries. With the time series of clear mutations since the late 1990s, the Inner Mongolian Reach has been in a new equilibrium phase. This can be concluded in two aspects. 1. The absence of big floods and sediment transportation from tributaries result in the river shrinkage, and to regain the channel flow-carrying capacity in Inner Mongolian Reach a large flood is needed both of high peak discharge and of lengthy interval to destroy the new equilibrium. 2. The proposed method of erosion-deposition area indicator is of great help to channel scour-deposition evolution analysis because it can demonstrate real time deformation of cross section in quantity.

关键词： Inner Mongolian Reach of the Yellow River erosion-deposition area indicator evolution equilibrium

The Key Driver of China’s New Economic Development Pattern:A Major Power’s Flying Geese Paradigm

在线全文

学校读者我要写书评

暂无评论

China Economist 2021年第5期16卷 104-131页

作者： Su Qingyi wang fenglong University of Chinese Academy of Social Sciences(UCASS) Institute of World Economics and Politics Chinese Academy of Social Sciences(CASS)BeijingChina School of International Relations UCASSBeijingChina

This paper examines China’s flying geese paradigm that serves as a key driver of a new pattern of the country’s economic *** results suggest that such a major power’s flying geese paradigm has taken shape in the aftermath of the global financial crisis in ***,this paradigm has provincial heterogeneity in that industrial relocation varies across *** instance,China’s central and western regions have shown differences while serving as destinations for labor-intensive industries and processing *** flying geese paradigm evolves in a slow and nonlinear manner,and may be subject to stagnation and even reversal.

关键词： new economic development pattern flying geese paradigm industrial relocation labor-intensive industries processing trade

High-permittivity Sb_(2)S_(3) single-crystal nanorods as a brand-new choice for electromagnetic wave absorption

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2021年第7期64卷 1733-1741页

作者： Jing Qiao Xue Zhang Chang Liu Zhou wang Wei Liu fenglong wang Jiurong Liu School of Materials Science and Engineering Shandong UniversityJinan 250061China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

The application of antimony sulfide(Sb_(2)S_(3))has been limited mainly to the energy storage and photoelectric conversion ***,in this work,the application of Sb_(2)S_(3) is extended to the field of electromagnetic(EM)wave absorption for the first ***-permittivity Sb_(2)S_(3) singlecrystal nanorods were prepared successfully and exhibited excellent performance,with a low reflection loss of -65.9 dB(13.0 GHz,3.8 mm)and an ultra-wide effective absorption bandwidth of 9.5 GHz(8.5-18.0 GHz,4.1 mm).After excluding the general absorption mechanisms,including conductive losses,interfacial polarization,and dipole polarization,the distinctive single-crystal volume polarization affected by shape anisotropy was *** work not only meets the challenge of a single-component dielectric material design but also introduces a new concept for construction of efficient dielectric EM wave absorption material.

关键词： antimony sulfide single-crystal nanorods high permittivity volume polarization electromagnetic wave absorption

PtCu-SnO_(2)nanocomposites for ultrasensitive and rapid ultra-low formaldehyde sensing

在线全文

学校读者我要写书评

暂无评论

ChemPhysMater 2022年第3期1卷 227-236页

作者： Zejun Han Yunxiang Tang Guixia Lu Yuan Qi Hao Wu Zhengyi Yang Hecheng Han Xue Zhang Lili Wu Zhou wang Jiurong Liu fenglong wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China School of Civil Engineering Qingdao University of TechnologyQingdao 266033China School of Energy and Environment City University of Hong KongHong Kong 999077China Shenzhen Research Institute of Shandong University A301 Virtual University Park in South District of Nanshan High-tech ZoneShenzhen 518057China

SnO 2 nanospheres with diameters of 30∼50 nm and Pt x Cu 1-x bimetallic nanoparticles with sizes of approxi-mately 10 nm were synthesized via hydrothermal and solvothermal methods,*** Pt x Cu 1-x bimetal-lic nanoparticles were impregnated on the surface of the SnO 2 spheres to form Pt x Cu 1-x-SnO 2 *** varying the atomic ratios between platinum(Pt)and copper(Cu),we found that Pt 0.75 Cu 0.25-SnO 2,with a large specific surface area of 89.21 m 2/g,enabled the selective and accurate detection of low-concentration formalde-hyde compared to other metal-deposited samples and pure SnO *** response value of Pt 0.75 Cu 0.25-SnO 2 to 500×10−9 formaldehyde was approximately 20 at an operating temperature of 160◦C with an extremely high-speed response(15 s).The porous structures with large specific surface areas,as well as the improved catalytic effects of Pt 0.75 Cu 0.25,comprehensively contributed to the enhanced sensing performance towards formaldehyde.

关键词： SnO_(2)nanospheres Pt^(x)Cu_(1-x)bimetallic nanoparticles Formaldehyde sensing Catalytic effect