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Tandem synthesis of tertiary amines using graphene encapsulated Ni nocatalyst via nitro compounds hydrogenation and primary amine methylation

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Green Chemical Engineering 2022年第1期3卷 64-70页

作者： Jianguo Liu yanpei song Huanli Wang Longlong Ma Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China Dalian National Laboratory for Clean Energy Dalian116023China CAS Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou510640China

Development of the economic, environmentally friendly synthesis of amines from nitro compounds remains important and challenging. In this work, the graphene shell encapsulated none noble Ni-based catalysts were successfully designed and synthesized via an environmentally friendly method using H2O or Et OH as solvent. These fresh and recycling catalysts were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. For the nitro compounds hydrogenation, Ni@C-600-H2O exhibits the best catalytic activity to achieve 100 mol/mol conversions of nitrobenzene and 99% selectivity of aniline under mild reaction conditions of 1.0 MPa H2and 60°*** halogen-substituted, olefin substituted nitro compounds and aliphatic nitro compounds were investigated and desired products were obtained in excellent selectivity. What is more, the catalyst had excellent stability and could be recycled 13 times without any significant loss in selectivity and activity. Furthermore, we also reported the methodology for tertiary amines synthesis using Ni-based catalyst via one-pot, cost-effective tandem combination reaction with nitrobenzene hydrogenation and amines N-methylation.

关键词： Encapsulated graphene shell Ni@graphene catalyst Selective hydrogenation Nitro compounds

基于增量动力地震易损性分析的高层结构抗震加固研究

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地震工程学报 2024年第2期46卷 309-317页

作者：宋颜培陈锦晶南昌交通学院土木建筑学院江西南昌330038

由于承重结构构件分布不均匀,导致高层建筑框架承重构件间的距离不相等。在地震时,这种不规则分布可能引起加速度共振效应,从而导致建筑失稳。为此,以地震动强度、地震动速度峰值、最大层间位移角为参数指标,分析高层建筑的极限状态,提... 详细信息

由于承重结构构件分布不均匀,导致高层建筑框架承重构件间的距离不相等。在地震时,这种不规则分布可能引起加速度共振效应,从而导致建筑失稳。为此,以地震动强度、地震动速度峰值、最大层间位移角为参数指标,分析高层建筑的极限状态,提出基于增量动力地震易损性分析的高层结构抗震加固研究。以某实际工程为试验对象,运用ABAQUS软件构造高层建筑框架结构三维模型,选取多条地震波以及符合场地条件的地震动记录进行验证,绘制地震易损性曲线。结果表明:在高层建筑框架结构中安装阻尼器,可增强结构中各构件的承载力,改善高层建筑抗震性能;增加钢板厚度可提高结构抗震水平,降低极限状态下框架结构IO、LS与CP的超越概率;提高混凝土强度,可改善框架结构抗倒塌性能。高层结构完成抗震加固后,抗震能力由0.91提升至1.01。由此证明,以增量动力分析得到的结构易损性为基础,对建筑易损性较大的地方进行加固、完善,能够改善高层建筑框架结构地震易损性,减少地震灾害损失。

关键词：增量动力分析高层建筑易损性三维模型地震动强度地震记录

Room-temperature phonon-coupled single-photon emission in hexagonal boron nitride

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 109-114页

作者： Jia-Min Lai Qing-Hai Tan Feilong song Haonan Chang yanpei Lv Xue-Lu Liu Jinghua Teng Weibo Gao Ping-Heng Tan Jun Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing100083China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education&Research Institute of Materials Science Shanxi Normal UniversityTaiyuan 030000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore

Photon-lattice(phonon)coupling is fundamental to light-matter interaction,particularly when it reaches the quantum limit of the phonon-coupled single-photon emission,which holds great potential for quantum manipulation and quantum information ***,we report single defect state-phonon coupling in hexagonal boron nitride(h BN)at room *** ultrabroad spectrum of single-photon emissions can be achieved by selecting the excitation *** photoluminescence excitation spectroscopy,we observe single-phonon-assisted resonance-enhanced single-photon emission,along with multiple phonon replicas that herald the creation of phonon Fock *** also develop a transition model to gain insight into the physical process behind the single defect state-phonon *** work sets the stage for manipulating electron-phonon coupling state with single quantum-level precision at room temperature.

关键词： temperature phonon hexagonal

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Damping Property of Supersaturated ZnA127Ce Alloy during Natural Aging

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Journal of Materials Science & Technology 2001年第1期17卷 9-10页

作者： Jingpei XIE Yaomin ZHU yanpei song Xiaoying WANG and Quande CHEN Dept.of Material Engineering , Luoyang Institute of Technology, Luoyang 471039. China Dep. of Mater. Eng. Luoyang Inst. of Technol. Luoyang 471039 China

The microstructures and damping property of supersaturated ZnA127Ce alloy during natural aging have been investigated. H-800 TEM was mainly used to research the microstructures. The relationship between microstructure and damping property was primarily studied. The results showed that solution plus natural aging was the best heat treatment, which could improve the damping property. Both continuous precipitation and cellular reaction occurred during the aging. Continuous precipitation follows the sequence: β→spherical GP zones→elliptical GP zones→intermediate phase R→n. The cellular reaction can be written as follows:β→a+n+ε.

关键词： Ce Damping Property of Supersaturated ZnA127Ce Alloy during Natural Aging

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建筑外墙钢板涂层的耐高温性能研究

兵器材料科学与工程 2023年第3期46卷 35-40页

作者：宋颜培俞希楠南昌交通学院土木建筑学院江西南昌330038

在镀锌TS278GD钢板上,用纳米硅溶胶、丙烯酸树脂、钼酸盐、胶态SiO2系钝化膜、钛盐等原料制备CD-1、CD-2、CD-3建筑外墙钢板涂层试件。通过涂层附着力、合成时间、腐蚀质量变化、涂层硬度、隔热性能等测试,分析3种建筑外墙钢板涂层的耐... 详细信息

在镀锌TS278GD钢板上,用纳米硅溶胶、丙烯酸树脂、钼酸盐、胶态SiO2系钝化膜、钛盐等原料制备CD-1、CD-2、CD-3建筑外墙钢板涂层试件。通过涂层附着力、合成时间、腐蚀质量变化、涂层硬度、隔热性能等测试,分析3种建筑外墙钢板涂层的耐高温性能。结果表明:在弯曲与上下折叠测试中CD-1轻微分层,CD-2出现轻微裂痕,CD-3无分层、脱落等现象,说明CD-3涂层附着力较高;CD-3在高温下可迅速实现涂层粘合反应,所需时间短;氙灯高温老化测试中CD-3的光泽率大于80%,高温光照未影响其表面光泽;800℃时CD-3的腐蚀质量变化低于另两种试件,且CD-3在800、900、1 000℃下均保持较小的腐蚀质量变化;当继续加热时CD-3的硬度及隔热效果仍最佳;因此以钼酸盐+胶态SiO2系钝化膜+CA-TJ薄膜+钛盐为复合涂层的建筑外墙钢板试件耐高温性能最佳。

关键词：钢板涂层建筑外墙耐高温性能腐蚀质量变化光泽保持率隔热效果

Microstructures and Properties of Recycled Composites – Particle Reinforced Iron Matrix Functionally Graded Materials Fabricated by Centrifugal Casting

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Engineering（科研） 2010年第5期2卷 360-366页

作者： yanpei song Shuangxu Bi Xiuqing Li 不详

Microstructures and properties of recycled composites ring parts containing cast tungsten carbide particles (CTCp) in a bainitic matrix fabricated from dead or waste composites roll rings by centrifugal casting after remelting treatment, have been tested using SEM, EDS and XRD analyses as well as mechanical property testers. The test results show that the CTCp surface were partially dissolved into the liquid iron at 1650 oC during remelting. The undissolved CTCp in the Fe melt moved towards the outer region under the action of the centrifugal force during casting, which caused the formation of outer reinforced region and inner unreinforced region along the radial direction of the parts. SEM observation displays that the undissolved CTCp distribution in the outer region is even, and the volume fraction of them is increased with increasing rotational speed of the mold. Besides, mechanical tests of the parts show that the outer region exhibits superior hardness, and the inner region has sufficient impact toughness;the volume fraction of CTCP influences the mechanical properties. The dissolution-reprecipition of CTCP during centrifugal casting was also discussed.

关键词： Recycled Composites Centrifugal Casting Mechanical Properties Microstructures

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原位自生钢基复合材料耐磨性能的研究

特种铸造及有色合金 2007年第3期27卷 229-231页

作者：魏永辉宋延沛河南科技大学材料科学与工程学院

用铸造的方法制备了原位自生复合碳化物[(Ti,W,Cr,V,Nb)C]增强钢基复合材料,并对该复合材料的磨粒磨损性能及磨损机理进行了研究。结果表明,采用该方法制备的钢基自生复合材料中,自生碳化物颗粒细小、圆整、且分布均匀,碳化物颗粒增强... 详细信息

用铸造的方法制备了原位自生复合碳化物[(Ti,W,Cr,V,Nb)C]增强钢基复合材料,并对该复合材料的磨粒磨损性能及磨损机理进行了研究。结果表明,采用该方法制备的钢基自生复合材料中,自生碳化物颗粒细小、圆整、且分布均匀,碳化物颗粒增强相体积分数达到42.8%;原位自生钢基复合材料的耐磨性能优良。在磨粒磨损条件下,其磨损机制主要是显微切削、颗粒脱落和脆性剥落;稀土和合金元素能够提高原位自生钢基复合材料的耐磨性能。

关键词：原位自生钢基复合材料复合碳化物增强耐磨性

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雾化喷射切削液在镍基合金车削中的试验研究

工具技术 2022年第10期56卷 44-49页

作者：周汉宋延沛陈丹萍苏明海南科技职业大学机电工程学院海口市571126 河南科技大学材料科学与工程学院河南省洛阳市471000

镍基高温合金具有良好的耐腐蚀、高强度和耐高温等优良性能,广泛应用于航空、航天工业领域中。针对镍基高温合金Inconel 718加工质量要求,根据不同切削参数,分别在雾化喷射切削液冷却加工方式和干式加工方式条件下进行了车削对比试验,... 详细信息

镍基高温合金具有良好的耐腐蚀、高强度和耐高温等优良性能,广泛应用于航空、航天工业领域中。针对镍基高温合金Inconel 718加工质量要求,根据不同切削参数,分别在雾化喷射切削液冷却加工方式和干式加工方式条件下进行了车削对比试验,并对加工振动、表面形貌、功耗、切屑形态、刀具磨损、刀具寿命和加工成本等重要性能指标进行了评估。结果表明,与干式加工技术相比,采用雾化喷射切削液技术能够获得良好的切削表面质量,且在加工成本方面具有一定的优势。

关键词：镍基合金雾化喷射切削参数表面质量

热处理工艺对Cr15Ni2MnMoCuNbRE铸钢组织及性能的影响

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金属热处理 2022年第2期47卷 178-182页

作者：宋延沛陈丹萍周汉林小丽李丽海南科技职业大学机电工程学院海南海口570100 河南科技大学材料科学与工程学院河南洛阳471023

采用扫描电镜、力学性能试验机和腐蚀磨损试验机研究了热处理工艺对Cr15Ni2MnMoCuNbRE铸钢组织、力学性能和耐腐蚀磨损性能的影响。结果表明,试验钢经860℃处理后的组织为奥氏体+晶界网状碳化物,热处理加热温度升高,试验钢的组织和性能... 详细信息

采用扫描电镜、力学性能试验机和腐蚀磨损试验机研究了热处理工艺对Cr15Ni2MnMoCuNbRE铸钢组织、力学性能和耐腐蚀磨损性能的影响。结果表明,试验钢经860℃处理后的组织为奥氏体+晶界网状碳化物,热处理加热温度升高,试验钢的组织和性能均得到不同程度的改善。当加热温度从860℃升至1000℃后,试验钢组织中晶界碳化物减少,形态改善,碳化物由晶界网状转变为细棒状,力学性能和耐腐蚀磨损性能显著提高。与加热温度860℃处理的试验钢相比,加热温度为1000℃处理的试验钢,其硬度和冲击吸收能量分别提高了5.9%和49.8%,达到了57.5 HRC和35.5 J,耐腐蚀磨损性能提高了1.88倍。

关键词： Cr15Ni2MnMoCuNbRE铸钢热处理工艺组织力学性能耐腐蚀磨损性能