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Cu,N codoped carbon nanosheets encapsulating ultrasmall Cu nanoparticles for enhancing selective 1,2-propanediol oxidation

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Journal of Energy Chemistry 2024年第4期91卷 27-35页

作者： Yonghai Feng Min yu Minjia Meng Lei Liu Dewei Rao Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

In the selective oxidation of biomass-based 1,2-propanediol(PDO)with oxygen as the terminal oxidant,it is challenging to improve the lactic acid(LA)selectivity for nonnoble metal nanoparticles(NPs)due to their limited oxygen reduction rate and easy C-C *** the high economic feasibility of nonnoble metals,i.e.,Cu,in this work,copper and nitrogen codoped porous carbon nanosheets encapsulating ultrafine Cu nanoparticles(Cu@Cu-N-C)were developed to realize highly selective of PDO oxidation to *** carbon-encapsulated ultrasmall Cu^(0)NPs in Cu@Cu-N-C have high PDO dehydrogenation activity while N-coordinated Cu(Cu-N)sites are responsible for the high oxygen reduction ***,the performance of catalytic PDO conversion to LA is optimized by a proposed pathway of PDO→hydroxylacetone→lactaldehyde→***,the enhanced LA selectivity is 88.5%,and the PDO conversion is up to 75.1%in an O_(2)-pressurized reaction system(1.0 MPa O_(2)),superior to other Cu-based catalysts,while in a milder nonpressurized system(O_(2)flow rate of 100 mL min-1),a remarkable LA selectivity(94.2%)is obtained with 39.8%PDO conversion,2.2 times higher than that of supported Au nanoparticles(1%Au/C).Moreover,carbon encapsulation offers Cu@Cu-N-C with strong leaching resistance for better recycling.

关键词： Selective oxidation Copper and nitrogen doped carbon 1,2-Propanediol Ultrasmall Cu nanoparticles Lactic acid

Constructing S-scheme charge separation in cobalt phthalocyanine/oxygen-doped g-C_(3)N_(4) heterojunction with enhanced photothermal-assisted photocatalytic H_(2) evolution

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Rare Metals 2024年第1期43卷 198-211页

作者： Wei-Long Shi Zheng Xu yu-Xing Shi Ling-Ling Li Jia-Lin Lu Xin-Hai Sun Xin Du Feng Guo Chang-yu Lu School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina College of Chemistry Zhengzhou UniversityZhengzhou 450001China School of Water Resource and Environment Hebei Province Key Laboratory of Sustained Utilization and Development of Water RecourseHebei Center for Ecological and Environmental Geology ResearchHebei Geo UniversityShijiazhuang 050031China

Hydrogen acquisition from solar energy is an effective way to address energy crisis,which makes the development of efficient photocatalysts become the main direction of scientific ***,cobalt phthalocyanine/oxygen-doped g-C_(3)N_(4)(CoPc/OCN) S-scheme heterojunction photocatalyst was designed by coupling multi-step calcination with solvothermal method for enhanced photothermal-assisted photocatalytic H_(2) *** multistep calcined g-C_(3)N_(4) is easier for O-doping formation,and the ethanol solvothermal strategy is utilized to enhance the dispersion of CoPc on OCN nano sheet surface and forms sufficient S-scheme heterojunction through *** addition,the active sites and excellent photothermal properties of CoPc itself further improve the integrated photocatalytic activity of CoPc/OCN S-scheme *** optimal photocatalytic hydrogen evolution rate of CoPc/OCN S-scheme heterojunction photocatalyst reached 9.56 mmol·g^(-1)·h^(-1),which is 2.69 and 1.23 times higher than that of CN and OCN,*** work provides a valuable design idea and scheme for enhancing the multi-factor co-assisted photocatalytic H_(2) evolution performance.

关键词： Photothermal Photocatalytic H_(2)evolution Cobalt phthalocyanine Oxygen-doped g-C_(3)N_(4) Sscheme heterojunction

Effects of hot deformation and in-situ ZrB2 particle on microstructure and tensile performance of AA7085 composite sheets

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Journal of Iron and Steel Research(International) 2024年第7期31卷 1778-1791页

作者： Jiang-jing Wu Xi-zhou Kai Chuang Guan yu-tao Zhao School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

To provide a new idea to reduce anisotropy for sheets in the thickness direction by microstructure modification and,mean-while,maintain or even enhance tensile performance,the in-situ ZrB2 particle/AA7085 composite sheets with thicknesses of 1,2,3,and 6 mm were *** as-cast grain size was significantly refined by the heterogeneous nucleus of the ZrB2 *** microstructure results show that severe hot deformation converts as-cast disordered microstructure into a sequential microstructure by crushing the remanent phases and matrix into a fiber *** the solid solution and aging heat treatment,the composite sheets exhibit largely recrystallized grains compared with partially recrystallized grains in the matrix sheets,and weak or even free texture exists in the *** grain size in the composite sheets decreases with the increase in thickness *** the thickness range of 1-3 mm,the composite sheets maintain a similar tensile per-formance as that in matrix sheets,while the strength and ductility in the 6-mm-thick composite sheet are improved.

关键词： Composite sheet Grain structure Texture Dislocation Strengthening

城市规划展示馆设计中的情感传递——以晋中城市规划展示馆为例

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遗产与保护研究 2017年第6期2卷 94-96页

作者：余振江北京建筑大学北京100044

自2000年2月15日,我国第一座城市规划展示馆——上海市规划展示馆正式对外开放以来,全国各大中城市及区县都积极开始兴建此类展馆,作为城市宣传的重要窗口,城市规划展示馆为公众了解城市历史,关注城市变化,参与城市发展等提供了重要的... 详细信息

自2000年2月15日,我国第一座城市规划展示馆——上海市规划展示馆正式对外开放以来,全国各大中城市及区县都积极开始兴建此类展馆,作为城市宣传的重要窗口,城市规划展示馆为公众了解城市历史,关注城市变化,参与城市发展等提供了重要的平台。城市展示馆的作用并不应只停留在收藏和展示空间的功能上,而应通过建筑由内而外地传达城市人文、地理以及文化信息,并且通过这一途径源源不断地传递真切的城市关怀。

关键词：城市规划展示馆重构民居建筑情感传递

Insights into Nano-and Micro-Structured Scaffolds for Advanced Electrochemical Energy Storage

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Nano-Micro Letters 2024年第7期16卷 187-230页

作者： Jiajia Qiu yu Duan Shaoyuan Li Huaping Zhao Wenhui Ma Weidong Shi Yong Lei Fachgebiet Angewandte Nanophysik Institut Für Physik and IMN MacroNanoTechnische Universit.t Ilmenau98693 IlmenauGermany Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093People’s Republic of China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Science and Technology Pu’er UniversityPu’er 665000People’s Republic of China

Adopting a nano-and micro-structuring approach to fully unleashing the genuine potential of electrode active material benefits in-depth understandings and research progress toward higher energy density electrochemical energy stor-age devices at all technology readiness *** to various challenging issues,especially limited stability,nano-and micro-structured(NMS)electrodes undergo fast electrochemical performance *** emerging NMS scaffold design is a pivotal aspect of many electrodes as it endows them with both robustness and electrochemical performance enhancement,even though it only occupies comple-mentary and facilitating components for the main ***,extensive efforts are urgently needed toward optimizing the stereoscopic geometrical design of NMS scaffolds to minimize the volume ratio and maximize their functionality to fulfill the ever-increasing dependency and desire for energy power source *** review will aim at highlighting these NMS scaffold design strategies,summariz-ing their corresponding strengths and challenges,and thereby outlining the potential solutions to resolve these challenges,design principles,and key perspectives for future research in this ***,this review will be one of the earliest reviews from this viewpoint.

关键词： Nano-and micro-structured Interconnected porous Scaffolds Electrode design Electrochemical energy storage

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火烧迹地土壤斥水性和渗透性变化特性

水文地质工程地质 2019年第6期46卷 40-45页

作者：王严胡卸文杨瀛于振江曹希超西南交通大学地球科学与环境工程学院四川成都610031 西南交通大学高速铁路运营安全空间信息技术国家地方联合工程实验室四川成都610031

林火会造成火烧迹地土壤斥水性增强及渗透性降低,导致降雨期间流域内地表产流率激增。在一定条件下,尤其是地形陡峭的高海拔山区,地表产流激增一般是泥石流灾害发生的重要诱因。然而,对于高海拔山区火烧迹地土壤斥水性和渗透性变化特征... 详细信息

林火会造成火烧迹地土壤斥水性增强及渗透性降低,导致降雨期间流域内地表产流率激增。在一定条件下,尤其是地形陡峭的高海拔山区,地表产流激增一般是泥石流灾害发生的重要诱因。然而,对于高海拔山区火烧迹地土壤斥水性和渗透性变化特征的研究相对缺乏。以海拔高程3029~4474 m的四川省雅江县恶古乡火烧迹地为研究对象,通过现场水滴入渗试验和圆盘入渗试验,探究斥水性强度分布及其与土壤入渗参数之间的内在联系。结果显示:土壤斥水性强度分布具备较大的空间异质性,林火对斥水性的影响深度在轻度火烧区为2 cm,在中度和严重火烧区为3 cm;研究区土壤渗透能力与斥水性强度呈反比,饱和导水率和吸渗率与水滴入渗时间之间遵循幂函数分布,其变异系数与火烈度呈正比,且严重火烧区部分土壤由于斥水性被高温破坏造成饱和导水率增大;斥水性土壤相较于亲水性土壤出现明显的入渗延迟现象。研究结果丰富了高海拔山区火烧迹地水文特征的研究,为揭示火烧迹地泥石流坡面物源起动机理提供理论依据。

关键词：林火烈度火烧迹地斥水性饱和导水率吸渗率

利用回归预测技术进行港口吞吐量预测的方法研究

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水运工程 2004年第4期 12-14页

作者：黄荣富李霞明顾宏余解放军镇江船艇学院江苏镇江212003

以某港口近15年的货物吞吐量作为原始数据,采用回归分析技术,建立回归预测模型,得到预测结果,为港口的发展战略研究提供一定的技术支持。

关键词：回归预测技术吞吐量模型检验

Target Detection Algorithm in Foggy Scenes Based on Dual Subnets

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Computers, Materials & Continua 2024年第2期78卷 1915-1931页

作者： yuecheng yu Liming Cai Anqi Ning Jinlong Shi Xudong Chen Shixin Huang School of Computer Science Jiangsu University of Science and TechnologyZhenjiang212100China Information Department China Merchants Heavy IndustryNantong226116China

Under the influence of air humidity,dust,aerosols,etc.,in real scenes,haze presents an uneven *** this way,the image quality and contrast will *** this case,It is difficult to detect the target in the image by the universal detection ***,a dual subnet based on multi-task collaborative training(DSMCT)is proposed in this ***,in the training phase,the Gated Context Aggregation Network(GCANet)is used as the supervisory network of YOLOX to promote the extraction of clean information in foggy *** the test phase,only the YOLOX branch needs to be activated to ensure the detection speed of the ***,the deformable convolution module is used to improve GCANet to enhance the model’s ability to capture details of non-homogeneous ***,the Coordinate Attention mechanism is introduced into the Vision Transformer and the backbone network of YOLOX is *** this way,the feature extraction ability of the network for deep-level information can be *** experimental results on artificial fog data set FOG_VOC and real fog data set RTTS show that the map value of DSMCT reached 86.56%and 62.39%,respectively,which was 2.27%and 4.41%higher than the current most advanced detection *** DSMCT network has high practicality and effectiveness for target detection in real foggy scenes.

关键词： Target detection fog target detection YOLOX twin network multi-task learning

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泥水平衡顶管技术在贫水中粗砂地质中的应用

施工技术 2008年第9期37卷 64-66页

作者：张宽峰于振江耿磊西安市第二市政工程公司管道分公司陕西西安710075

泥水平衡顶管施工技术在贫水的西北地区尚无成熟的施工经验;结合纬零街道路改造工程混凝土管道顶进施工,指出了泥水平衡顶管施工的优点,并根据工程实践,总结出泥水平衡顶管施工技术在贫水砂层中顶进的施工技术措施及应注意的问题,保证... 详细信息

泥水平衡顶管施工技术在贫水的西北地区尚无成熟的施工经验;结合纬零街道路改造工程混凝土管道顶进施工,指出了泥水平衡顶管施工的优点,并根据工程实践,总结出泥水平衡顶管施工技术在贫水砂层中顶进的施工技术措施及应注意的问题,保证了顶进施工顺利实施。

关键词：顶管施工泥水平衡贫水中粗砂地质施工技术