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Simultaneous improving luminescence intensity and stability of CsPbBr_(3):SCN−@Eu/Zr-Uio-66-NH_(2) with tunable emissions from blue to green and applications in indoor photovoltaics

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Nano Research 2024年第8期17卷 6879-6887页

作者： Minze Li Yao Sun honglai lu Peifen Zhu Ruihong Wang Guofeng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA

The construction of stable and efficient materials that emit blue and green light remains a *** the blue light materials reported,metal-organic framework(MOF)materials are rarely reported as blue phosphors due to their weak luminescence *** on the construction of CsPbBr_(3)@MOF(CPB@MOF),an innovative idea was proposed to simultaneously enhance the green luminescence of CPB and the blue luminescence of MOF through the interaction between CPB and MOF for the first *** expected,the blue luminescence from CPB:7%SCN−@0.5%MOF:Eu as well as the green luminescence from 5%CPB:7%SCN−@MOF:Eu was sufficient to construct high-performance light-emitting diode(LED)devices and further excite solar cells to generate stable photoelectric *** white LED(WLED)device with excellent color quality(color rendering index(CRI)=96.2)and correlated color temperature(CCT=9688 K)can be constructed by using the obtained blue-emitting CPB:7%SCN-@0.5%MOF:Eu,green-emitting 5%CPB:7%SCN−@MOF:Eu,and red-emitting PPB:30%Mn^(2+).The density functional theory(DFT)theoretical calculation results indicate that the p orbital of Pb plays the major role in the conduction band,and the p orbital of Br plays the major role in the valance band of CPB and CPB:SCN−.While the p orbital of O plays the major role in both the conduction band and valance band of *** heat capacity of CPB and CPB:SCN−separately reaches the Dulong–Petit limit at 200 and 400 K,indicating that the thermal stability of CsPbBr_(3)increases after SCN−doping.

关键词： CsPbBr_(3):SCN−@Uio-66-NH_(2) composites luminescence stability white light-emitting diodes(WLEDs) indoor photovoltaics density functional theory(DFT)calculation

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仿生Al_(2)O_(3)/SiCnw/环氧复合材料的制备及性能研究

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电子显微学报 2024年第5期43卷 571-579页

作者：张宇贝孙晓毅李逢时张蔷卢洪来岳永海北京航空航天大学化学学院北京102206 北京航空航天大学国际前沿交叉科学研究院北京100191

生物结构为设计和制造具有优异性能的先进材料提供了灵感,本文受螳螂虾中抗冲击区域结构启发,发展了一种基于3D打印制备氧化铝正弦波纹结构与冰模板法构筑碳化硅纳米线层状结构相结合的多组装策略,并通过浸渗环氧树脂,最终成功构建了仿... 详细信息

生物结构为设计和制造具有优异性能的先进材料提供了灵感,本文受螳螂虾中抗冲击区域结构启发,发展了一种基于3D打印制备氧化铝正弦波纹结构与冰模板法构筑碳化硅纳米线层状结构相结合的多组装策略,并通过浸渗环氧树脂,最终成功构建了仿生陶瓷-聚合物复合材料。实验表明,波纹结构和与之垂直排列的层状结构通过多尺度耦合强化作用,同时利用聚合物阻止了裂纹扩展,使得该复合结构的力学性能较于单一结构得到了提升。这种通过双组装高效制备仿生多级次结构的策略,在航空航天、装甲防护以及电磁屏蔽等领域具有较大应用潜力。

关键词： 3D打印冰模板法仿生多层级结构结构表征力学性能

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Bubble size fractal dimension,gas holdup,and mass transfer in a bubble column with dual internals

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Chinese Journal of Chemical Engineering 2020年第12期28卷 2968-2976页

作者： Xiao Xu Junjie Wang Qiang Yang Lei Wang Hao lu honglai Liu Hualin Wang School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and TechnologyShanghai 200237China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

As the scale of residual oil treatment increases and cleaner production improves in China,slurry bubble column reactors face many challenges and opportunities for residual oil hydrogenation *** internals development is critical to adapt the long-term stable *** this paper,the volumetric mass transfer coefficient,gas holdup and bubble size in a gas-liquid up-flow column are studied with two kinds of *** gas holdup and volumetric mass transfer coefficient increase by 120% and 42% when the fractal dimension of bubbles increases from 0.56 to 2.56,*** enhanced mass transfer processing may improve the coke suppression ability in the slurry reactor for residual oil *** results can be useful for the exploration of reacting conditions,scale-up strategies,and oil *** work is valuable for the design of reactor systems and technological processes.

关键词： Gas-liquid reactor Fractal dimension Mass transfer Bubble column

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CO_2 capture through halogen bonding: A theoretical perspective

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Science China Chemistry 2012年第8期55卷 1566-1572页

作者： LI HaiYing lu YunXiang ZHU Xiang PENG ChangJun HU Jun LIU honglai HU Ying State Key Laboratory of Chemical Engineerin0g Department of ChemistryEast China University of Science and TechnologyShanghai 200237China

Halogen bonding interactions between several halogenated ion pairs and CO2 molecules have been investigated by means of density functional theory calculations. To account for the influence of solvent environment, the implicit polarized continuum model was also employed. The bromide and iodide cations of ionic liquids (ILs) under study can interact with CO2 molecules via X O interactions, which become much stronger in strength than those in the complexes of iodo-perfluorobenzenes, very effective halogen bond donors, with CO2 molecules. Such interactions, albeit somewhat weaker in strength, are also observed between halogenated ion pairs and CO2 molecules. Thus, the solubility of CO2 may be improved when using halogenated ILs, as a result of the formation of X O halogen bonds. Under solvent effects, the strength of the interactions tends to be weakened to some degree, with a concomitant elongation of intermolecular distances. The results presented here would be very useful in the design and synthesis of novel and potent ILs for CO2 physical absorption.

关键词： halogen bonding interactions CO2 physical absorption calculations

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Halogen bond-driven 2D self-assembly on solid surface: A first-principles study

Halogen bond-driven 2D self-assembly on solid surface: A fir...

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第十三届全国量子化学会议

作者： Shaoze Zhang Yunxiang lu honglai Liu Key Laboratory for Advanced Materials and School of Chemistry ＆ Molecular Engineering East China University of Science and Technology

The formation of halogen bond-driven 2D supramolecular assemblies on solid surfaces has become a hot research topic in recent years. We present a first-principles density functional theory（DFT） study of the halogen-bonded network formation on graphene and gold surfaces. The interplay between halogen and hydrogen bonds in the self-assemblies of functional molecules containing bromine substituents and carbonyl groups was also studied. To unravel the nature of molecule-molecule and molecule-substrate interactions, the noncovalent interaction index（NCI）, electron density difference（EDD）, charge decomposition analysis（CDA）, density of state（DOS）, and topographical scan tunneling microscopy（STM） image analyses were *** bonds appear to be the primary interactions in the self-assembled networks, with geometries in good agreement with the experimental STM images. This is the first systematic quantitative analysis of these interactions on solid surfaces via periodic DFT method, which should be of great importance in the applications of halogen bonds in molecular self-assembly on surfaces.

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Strong extraction ability of Task-Specific Ionic Liquids over Conventional Ionic Liquids : An Experimental and Theoretical Study

Strong extraction ability of Task-Specific Ionic Liquids ove...

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中国化学会第十二届全国量子化学会议

作者： Weihong Wu Yunxiang lu Mengying Liu Changjun Peng honglai Liu Ying Hu State Key Laboratory of Chemical Engineering and Department of Chemistry East China University of Science and Technology

A hydrophobic task-specific ionic liquid designed to extract Cu2+from water was prepared by appending thiourea-substituted alkyl groups to imidazoles and combining the resulting cationic species with *** new ionic liquid was characterized and investigated for metal ion extraction capabilities,compared with conventional ionic *** used in liquid/liquid extraction of Cu2+from aqueous solutions,the metal ion extraction rate increased tremendously in *** surface analysis and Fukui Function indicates that the thiourea group possesses a powerful electronic interaction to metal ion and a strong electron donating ability,which may responsible for the improving in extraction.

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相位校正器的粘接热应力分析

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激光与光电子学进展 2023年第5期60卷 294-299页

作者：卢飞向汝建徐宏来张卫中国工程物理研究院高能激光科学与技术重点实验室四川绵阳621900 中国工程物理研究院应用电子学研究所四川绵阳621900

粘接工艺会影响相位校正器的实际性能,然而在研制过程中相位校正器的镜面常出现破损情况。分析粘接工艺后校正面面形的特征和镜面破损的特点发现,镜面玻璃与连接柱头材料之间热膨胀系数差异过大会导致高温固化后校正面相应位置的残余应... 详细信息

粘接工艺会影响相位校正器的实际性能,然而在研制过程中相位校正器的镜面常出现破损情况。分析粘接工艺后校正面面形的特征和镜面破损的特点发现,镜面玻璃与连接柱头材料之间热膨胀系数差异过大会导致高温固化后校正面相应位置的残余应力过大。建立数值模型对连接处的热应力进行仿真,并选取热膨胀系数与镜面玻璃相近的柱头材料以及固化温度更低的黏接剂减小残余应力。将柱头材料更换为热膨胀系数与玻璃材料(K9)更匹配的3Cr13,实验结果表明,高温固化后相位校正器的静态面形有了极大改善,多次实验均未出现校正面破损的情况。

关键词：光学器件相位校正器粘接热应力高温固化镜面破损

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相位校正器粘接局部应力控制技术

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强激光与粒子束 2015年第7期27卷 11-14页

作者：徐宏来向汝建卢飞雒仲祥李国会中国工程物理研究院应用电子学研究所四川绵阳621900 中国工程物理研究院高能激光科学与技术重点实验室四川绵阳621900

通过理论分析,对相位校正器的镜面与支撑结构间的粘接建立模型进行仿真研究,提出了在相位校正器镜片上加工小圆柱,使其粘接应力由镜片本身转移到突出部位的小柱子上,有效改善了相位校正器镜面局部粘接应力,使镜面局部高阶像差得到缓解,... 详细信息

通过理论分析,对相位校正器的镜面与支撑结构间的粘接建立模型进行仿真研究,提出了在相位校正器镜片上加工小圆柱,使其粘接应力由镜片本身转移到突出部位的小柱子上,有效改善了相位校正器镜面局部粘接应力,使镜面局部高阶像差得到缓解,并通过试验验证了其有效性。

关键词：相位校正器粘接应力 3D镜片

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EMISSION AND SURFACE CHARACTERISTICS OF A DISPENSER CATHODE COATED WITH RHENIUM

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Journal of Electronics(China) 1991年第2期8卷 180-186页

作者：张洪来由玉新程永吉王亚杰吕庆年 Institute of Electronics Academia SinicaBeijing

The emission and surface characteristics of a dispenser cathode coated with Re *** is found that the dispenser cathode coated with Re has both higher current densityand more uniform distribution of emission than the S-type *** Auger images of Bashow that the Ba distribution on the surface of the cathode coated with Re is more uniform thanthat on the surface of the S-type *** analytical results by XPS and low energy AESshow that the Ba on the surface of the cathode coated with Re has stronger metallic propertythan that on the surface of the S type cathode.

关键词： Thermionic cathode M type cathode Thermionic emission cathode surface analysis

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MBr(M=Na,K)在离子液体[Bmim]Br水溶液中的溶解度

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化工学报 2012年第10期63卷 3011-3016页

作者：任颖倩陆轶群彭昌军刘洪来华东理工大学化学系化学工程联合国家重点实验室上海200237

为探索溴化1-丁基-3-甲基咪唑([Bmim]Br)离子液体对无机溴化物MBr(M=Na,K)在水中溶解度的影响,采用等温溶解平衡法在常压下测定了298.15～328.15K范围内MBr在[Bmim]Br(1)+H2O(2)溶液中的溶解度,考察了离子液体含量对溶解度的影响。实验... 详细信息

为探索溴化1-丁基-3-甲基咪唑([Bmim]Br)离子液体对无机溴化物MBr(M=Na,K)在水中溶解度的影响,采用等温溶解平衡法在常压下测定了298.15～328.15K范围内MBr在[Bmim]Br(1)+H2O(2)溶液中的溶解度,考察了离子液体含量对溶解度的影响。实验结果表明,[Bmim]Br的加入会显著降低MBr(M=Na,K)在水中的溶解度,离子液体[Bmim]Br对KBr的盐析作用比对NaBr的盐析作用大。不同温度下的溶解度数据可用Pitzer混合电解质溶液模型进行关联,得到了混合离子相互作用参数以及MBr在混合溶剂中的平均活度因子和溶剂的渗透系数。模型计算的溶解度与实验结果吻合良好,平均活度因子和溶剂的渗透系数均随离子液体含量的增加而增加。

关键词：离子液体溶解度 Pitzer模型

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