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催化中的极限结构:单原子,亚纳米团簇和电子

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Science China Materials 2023年第12期66卷 4521-4541页

作者：王泓麟李晶朱宏伟 State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Lab of Solid Waste Reuse for Building Materials Beijing Building Materials Academy of Science ResearchBeijing 100041China

催化剂的尺寸在降低到原子尺度时表现出显著的性能提升,如原子利用率提高、配位不饱和度增强和比表面积增加.为了实现高效催化,针对原子分布和电子行为的精细设计与调控至关重要,由此引入了“极限结构”这一概念.极限结构涵盖了单个原... 详细信息

催化剂的尺寸在降低到原子尺度时表现出显著的性能提升,如原子利用率提高、配位不饱和度增强和比表面积增加.为了实现高效催化,针对原子分布和电子行为的精细设计与调控至关重要,由此引入了“极限结构”这一概念.极限结构涵盖了单个原子、双原子,单个原子链/层和亚纳米团簇等结构.围绕这些极限结构在原子和电子尺度上研究催化剂,可以更深入地理解其本征性质并为未来的催化剂设计提供新的方向.本文总结了极限结构在催化应用中的最新进展和研究方向,重点讨论单原子、亚纳米团簇和电子尺度的反应动力学.特别关注极限结构的优化策略,如金属-支撑作用增强、缺陷和电子结构调控.探讨了各种极限结构之间的相互关系,强调了每个结构的特性.最后,展望了极限结构在催化领域的未来发展趋势.

关键词： ultimate structures catalysts single atoms subnanoclusters

Flow-induced voltage generation in graphene network

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Nano Research 2015年第8期8卷 2467-2473页

作者： Junchao Lao Yijia He Xiao Li FuzhangWu Tingting Yang Miao zhu Yangyang Zhang Pengzhan Sun Zhen Zhen Baochang Cheng hongwei zhu Institute for Advanced Study Nanchang University Nanchang 330031 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China

我们基于一个 graphene 网络(GN ) 报导一个电压发电机。响应在 GN 脱衣上的离子的答案的微滴的运动，几百毫伏特的电压在周围的条件下面被观察。在电压产生过程， GN 的唯一的结构在改进电子转移的率起一个重要作用。给他们的优秀机械... 详细信息

我们基于一个 graphene 网络(GN ) 报导一个电压发电机。响应在 GN 脱衣上的离子的答案的微滴的运动，几百毫伏特的电压在周围的条件下面被观察。在电压产生过程， GN 的唯一的结构在改进电子转移的率起一个重要作用。给他们的优秀机械性质， GN 可以为在象被暴露下雨的雨衣，伞，窗口，和另外的表面那样的各种各样的地方收获震动的精力发现应用。

关键词：电压发生器石墨网络 Windows 电子传递速率室温条件离子溶液产生过程

Graphene oxide as an antimicrobial agent can extenCthe vase life of cut flowers

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Nano Research 2018年第11期11卷 6010-6022页

作者： Yijia He Lichao Qian Xu Liu Ruirui Hu Meirong Huang Yule Liu Guoqiang Chen Dusan Losic hongwei zhu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China Center for Plant Biology and MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 China Department of Biology School of Life Sciences Tsinghua University Beijing 100084 China School of Chemical Engineering Engineering North Building The University of Adelaide Adelaide SA 5005 Australia

“PlantNanOmics” is an emerging topic in agricultural research that explores the potential effect of application of nanomaterials on plant growth. Graphene oxide (GO) has excellent properties due to its basal carbon plane and oxygen-containing functional groups. In the present work, the antimicrobial activity of GO was exploited to extend the vase life and improve the quality of cut roses (cv. Carola). The results revealed that the cut roses cultivated in low doses of GO (0.1 mg/L) had longer vase life, larger diameter, and better water relations. Microbial contaminations at the basal stem end is the most common reason for stem blockage that causes water stress and early wilting of cut flowers. GO was found to act as a germicide, effectively inhibiting the microbial growth at the cut stem end and improving water uptake and water balance of cut roses. Therefore, GO can serve as a promising preservative to increase the ornamental value of cut flowers.

关键词： graphene oxide cut flower antimicrobial water transport vase life

Recent advances in friction and lubrication of graphene and other 2D materials:Mechanisms and applications

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Friction 2019年第3期7卷 199-216页

作者： Lincong LIU Ming ZHOU Long JIN Liangchuan LI Youtang MO Guoshi SU Xiao LI hongwei zhu Yu TIAN School of Mechanical Engineering Guangxi University of Science and TechnologyLiuzhou545006China Chengdu Carbon Co. Ltd.No.88South2RoadEconomic and Technological Development ZoneChengdu610100China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China State Key Laboratory of Tribology Tsinghua UniversityBeijing100084China

Two-dimensional materials having a layered structure comprise a monolayer or multilayers of atomic thickness and ultra-low shear *** high specific surface area,in-plane strength,weak layer-layer interaction,and surface chemical stability result in remarkably low friction and wear-resisting ***,2D materials have attracted considerable *** recent years,great advances have been made in the scientific research and industrial applications of anti-friction,anti-wear,and lubrication of 2D *** this article,the basic nanoscale friction mechanisms of 2D materials including interfacial friction and surface friction mechanisms are *** paper also includes a review of reports on lubrication mechanisms based on the film-formation,self-healing,and ball bearing mechanisms and applications based on lubricant additives,nanoscale lubricating films,and space lubrication materials of 2D materials in ***,the challenges and potential applications of 2D materials in the field of lubrication were also presented.

关键词： two-dimensional materials graphene anti-friction anti-wear lubrication

Effect of Ermiao Fang with Xixin(Herba Asari Mandshurici) on bone marrow stem cell directional homing to a focal zone in an osteoarthritis rat model

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Journal of Traditional Chinese Medicine 2014年第4期34卷 477-487页

作者： Ying Xu Guojing Dai Qian Liu hongwei zhu Weiheng Chen Ping Zhang Tiejun Zhao Na Lin the Center for Theory of Traditional Chinese Medicine Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Department of Bone and Joint Wangjing Hospital China Academy of Chinese Medical Sciences

OBJECTIVE: To investigate the effects of Ermiao Fang(EM) with medical guide Xixin(Herba Asari Mandshurici)(HAM) on bone marrow stem cell migration to a focal zone in osteoarthritis(OA) ***: OA rats were induced by arthrectomy and assigned to sham-operated, model, EM, or EM plus HAM *** rats were injected with recombinant human granulocyte colony-stimulating factor 30μg·kg-1·d-1for7 days and treated with EMor EM plus HAM at 1.6 or 1.9 g·kg-1·d-1 for 3 or 6 weeks, respectively. Chondrocyte apoptosis and cartilage matrix components were tested by transferase-mediated deoxyuridine triphosphate-biotin nick end labeling assay and special staining. Levels of interleukin-1 beta(IL-1β) tumor necrosis factor alpha(TNF-α) nitric oxide(NO), and inducible nitric oxide synthase(iNOS) in serum were detected by enzyme-linked immunosorbent assay or radioimmunoassay. Matrix metalloproteinases(MMPs)-13,tissue inhibitors of metalloproteinases(TIMPs)-1,Bromodeoxyuridine(BrdU), cluster of differentiation 34(CD34), and stromal cell-derived factor 1(SDF-1) were measured by immunohistochemical ***:The EM and EM plus HAM groups had significantly less cartilage damage and synovium inflammation the model group. Moreover, the EM and EM plus HAM groups had less chondrocyte apoptosis and more proteoglycan and collagen content than the model *** EM and EMplus HAM groups had obviously higher MMPs-13 and TIMPs-1 expression in the cartilage than the model group. Moreover, the two formula groups had less release of IL-1β, TNF-α, NO, and iNOS than model group. Importantly, the expressions of BrdU, CD34,and SDF-1 in cartilage were significantly higher in the EM and EM plus HAM-Medtreated rats than model group. Notably, the EM plus HAM treatment seemed to have the greatest ***: HAM improves the therapeutic effects of EM on OA rats by enhancing BMSC directional homing to the focal zone.

关键词：骨性关节炎骨髓干细胞动物模型细辛焦点重组人粒细胞集落刺激因子金属蛋白酶组织抑制因子归巢

Nest-like multilevel structured graphene oxide-on-polyacrylonitrile membranes for highly efficient filtration of ultrafine particles

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Journal of Materiomics 2019年第3期5卷 422-427页

作者： Jing Li Danzhen Zhang Xin Jiang Xuanliang Zhao Ruirui Hu Yujia Zhong hongwei zhu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Developing filtration media for particulate matter(PM)removal has been proven to be extremely ***,we report a facile and scalable strategy to fabricate a multi-level structured polyacrylonitrile/graphene oxide(PAN/GO)air filtration membrane to remove ultrafine particles in air by combining multi-jet electrospinning and physical *** approach allows the thin PAN nanofibers and two-dimensional GO nanosheets to form interpenetrating bonding structures on non-woven fabric and to assemble into stable filtration *** resultant composite membranes can filtrate 300 nm particles with a high removal efficiency of 98.8%,a low pressure drop of 55 Pa,and a desirable quality factor of 0.34 Pa^(-1).This multi-level PAN/GO filter is expected to have wider applications not only for the ultrafine particle filtration and separation but also for the design of three-dimensional functional structures in the future.

关键词： Graphene oxide Polyacrylonitrile Electrospinning Ultrafine particles

Hydrophobic ionic liquid-in-polymer composites for ultrafast,linear response and highly sensitive humidity sensing

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Nano Research 2021年第4期14卷 1202-1209页

作者： Xuanliang Zhao Kanglin Zhou Yujia Zhong Peng Liu Zechen Li Jialiang Pan Yu Long Meirong Huang Abdelrahman Brakat hongwei zhu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering University of CaliforniaBerkeleyUSA

Traditional ionic liquids are sensitive to humidity but with long response time and nonlinear *** liquid-state ionic liquids are usually hard for dehydration which have ultralong response time for humidity *** immobilization of ionic liquids provide a possible way for high performance humidity *** materials and structures also promised faster response in humidity sensing,because of easier desorption of *** this work,we prepared flexible humidity sensitive composites based on hydrophobic ionic liquid and *** combination of hydrophobic ionic liquid with hydrophobic polymer realized linear response,high sensitivity with low hysteresis to *** adjusting the ratio of ionic liquid,not only the impedance but also the hydrophobicity of composite could be modulated,which had a significant influence on the humidity sensing *** morphology and microstructure of the material also affected its interaction with water *** to the diverse processing methods of polymer,highly transparent film fabricated by spinning-coating and nanofibrous membrane fabricated by electrospinning could be prepared and exhibited different response time,which could be used for different application ***,the fibrous membrane made with electrospinning method showed an ultrafast response and could distinguish up to 120 Hz humidity change,due to its fibrous structure with high specific surface *** humidity sensors with ultrafast,linear response and high sensitivity showed potential applications in human respiratory monitoring and flexible non-contact *** better show the multifunction of ionic liquid-polymer composite,as a proof of concept,we fabricated an integrated humidity sensitive color change device by utilizing lower ionic liquid content composite for sensing in the humidity sensing module and higher ionic liquid content composite as the electrolyte in the electrochromic module.

关键词： ionic liquid flexible humidity sensing ultrafast response hydrophobic

The CropGPT project:Call for a global,coordinated effort in precision design breeding driven by Al using biological big data

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Molecular Plant 2024年第2期17卷 215-218页

作者： Wanchao zhu Rui Han Xiaoyang Shang Tao Zhou Chengyong Liang Xiaomeng Qin Hong Chen Zaiwen Feng hongwei Zhang Xingming Fan Weifu Li Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region College of AgronomyNorthwest A&F UniversityYanglingShaanxi712100China College of Informatics Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijing 100081China institute of Food Crops Sciences Yunnan Academy of Agricultural Sciences2238 Beijing RoadKunmingYunnan 650200China Hubei Hongshan Laboratory Wuhan 430070China Shenzhen Institute of Nutrition and Health Huazhong Agricultural UniversityWuhan 430070China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Since the beginning of humanity,people have been seeking practical solutions to meet their most basic need:*** advent of agriculture greatly increased the food supply and led to a rapid increase in the human *** food production via agriculture can be attributed to both improved crop management practices and crop breeding through ***(crop)breeding has been categorized into four major stages based on the techniques employed(Wallace et al.,2018).

关键词： breeding seeking Wallace

The sedimentary structure characteristics and spatial distribution pattern of the Zhaoji Salt Mine derived from dense array ambient noise tomography

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Journal of Earth Science 2024年

作者： hongwei Wang Xiaofeng Tian Qiaoxia Liu Jia Cheng Ming Zhou Zhiping Xu Jiyan Lin Shuaipeng zhu Geophysics Exploration Center China Earthquake Administration School of Earth Sciences and Resources China University of Geosciences (Beijing)

Due to the lack of the three-dimensional structure of the Zhaoji salt basin， the salt mining enterprises have obvious clustering when choosing sites. Production capacity declines rapidly as mining deepens， the enterprises are entering a stage of stagnation in production. In this study， a dense seismic array of 125 short-period stations was deployed around the core mining area and its vicinity of the salt mine industry， we use the ambient noise tomography (ANT) method to image the three-dimensional shear wave velocity structure at the depth shallower than 3 km. The results indicate: (1) The overall shear wave velocity in the study area is relatively lower， ranging from 0.8 and 1.8 km/s， which could be related to the loose and thick deposition of the Zhaoji Sub-Depression. (2) The three-dimensional shear wave velocity structure reveals that the sedimentary thickness of the Zhaoji Sub-Depression is deeper in the southeast and shallower in the northwest， with the sedimentary center located around Heping Town and Dahuangzhuang Town. (3) The Zhaoji salt mine is a low-velocity anomalous zone in the shear wave velocity structure with an inverse 'C' character spreading along Nanchenji Town and Zhaoji Town， with a depth ranging from approximately 1.2 to 2.8 km， it may be caused by the development of rock fissures due to water extraction and injection. The surrounding rock exhibits relatively high velocity， which reflects the morphological characteristics of the Zhaoji salt basin. The three-dimensional shear wave velocity model obtained in this study provides scientific guidance for the industrial exploitation of the Zhaoji salt mine and reference for salt exploration of the Hongze Salt Basin. It also provides an important basis for the seismic risk assessment of the salt basins. Simultaneously， it holds significant implications for exploring the application of ambient noise tomography method in spatial detection of salt mine belt.

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