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Measuring Charge Distribution of Molecular Cations by an Atomic Coulomb Probe Microscope

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Chinese Physics Letters 2022年第11期39卷 12-17页

作者： xitao yu Xiaoqing Hu Jiaqi Zhou Xinyu Zhang Xinning Zhao Shaokui Jia Xiaorui Xue Dianxiang Ren Xiaokai Li Yong Wu Xueguang Ren Sizuo Luo Dajun Ding Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China Institute of Applied Physics and Computational Mathematics Beijing 100088China School of Physics Xi'an Jiaotong UniversityXi'an 710049China

Imaging the charge distributions and structures of molecules and clusters will promote the understanding of the dynamics of the quantum ***,we report a method by using an Ar atom as a tip to probe the charge distributions of benzene(Bz)cations in gas ***,the measured charge distributions of Bz^(+)(δ_(H)=0.204,δ_(C)=-0.037)and Bz^(2+)(δ_(H)=0.248,δ_(C)=0.0853)agree well with the calculated Mulliken distributions,and the structures of Bz2 is reconstructed by using the measured charge *** structures of two Bz2isomers(T-shaped and PD isomers)can be resolved from the measured inter-molecular potential V(R)between two Bz ions,and the structures of Bz dimer agree well with the theoretical predictions.

关键词： isomers charge Probe

Remediation of polychlorinated biphenyl-contaminated soil by microwave irradiation with assistance of activated carbon

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Remediation of polychlorinated biphenyl-contaminated soil by...

Electrochemical hydrodechlorination of 4-chlorobiphenyl in aqueous solution using Pd-loaded cathode materials

持久性有机污染物论坛2006暨第一届持久性有机污染物全国学术研讨会

作者： xitao Liu, Gang yu (Persistent Organic Pollutants Research Centre, Department of Environmental Science & Engineering, Tsinghua University, Beijing, China, 100084,

The application of microwave and activated carbon for the treatment of polychlorinated biphenyl (PCB) contaminated soil was explored in this study with a model compound of 2,4,5-trichlorobiphenyl (PCB29). PCB-contaminated soil was treated in a quartz reactor by microwave irradiation at 2450 MHz with the addition of granular activated carbon (GAC). A sheltered type-K thermocouple was applied to record the temperature rising courses. It was shown that the addition of GAC could effectively promote the temperature rising courses. The determination of PCB residues in soil by gas chromatography (GC) revealed that rates of PCB removal were highly dependent on microwave power, soil moisture content, and the amount of GAC added. GC with mass spectrum (MS) detector and ion chromatography were employed for the analysis of degradation intermediates and chlorine ions, respectively. It was suggested that microwave irradiation with the assistance of activated carbon might be a potential technology for the remediation of PCB-contaminated soil.

关键词： Microwave Irradiation Activated Carbon Remediation PCB Soil

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Electrochemical hydrodechlorination of 4-chlorobiphenyl in a...

持久性有机污染物论坛2006暨第一届持久性有机污染物全国学术研讨会

作者： Bo Yang, Gang yu, and xitao Liu (Persistent Organic Pollutants Research Centre, Department of Environmental Science & Engineering, Tsinghua University, Beijing, China, 100084)

The electrochemical hydrodechlorination of 4-chlorobiphenyl (4-MCB) in aqueous solution containing MeOH and surfactant was investigated under constant current electrolysis by using a membrane-separated flow-though cell operated in batch-recycle modes. The effects of catalyst type, cathode substrate, cathode recycle, and catalyst loading on the conversion of 1 mM 4-MCB were evaluated. The catalyst of Pd, Pt, or Ni and several types of cathode substrates such as metallic mesh/foam and activated carbon material were tested. It was found that the Pd-loaded nickel foam was most suitable to be used as cathode for the treatment of 4-MCB due to its high performance and stability, which could rapidly dechlorinate 4-MCB to biphenyl with 94.3% conversion and 91.5% yield under constant current of 15mA after 3h electrolysis. During the electrolysis, the current efficiencies and energy consumptions were in range of 5.5-20% and 2.1-7.9 kWh·kg-1, respectively.

关键词： Electrochemical hydrodechlorination (HDC) 4-chlorobiphenyl Pd Cathode materials nickel foam

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山东烟台苹果施肥现状调查

中国果树 2021年第7期 91-95页

作者：陈毅凡吴天昊韩熙睿俞红于喜涛王承国中国农业大学烟台研究院山东264670

为促进烟台市苹果产业发展,推动有机肥替代化肥的进程,对山东省烟台市苹果主要产区施肥现状及存在问题进行了调查。结果表明:烟台市苹果园中,79.4%的农户施基肥,以商品有机肥为主;20.6%的农户不施基肥,只追肥,以三元复合肥为主。基肥中,... 详细信息

为促进烟台市苹果产业发展,推动有机肥替代化肥的进程,对山东省烟台市苹果主要产区施肥现状及存在问题进行了调查。结果表明:烟台市苹果园中,79.4%的农户施基肥,以商品有机肥为主;20.6%的农户不施基肥,只追肥,以三元复合肥为主。基肥中,N、P_(2)O_(5)、K_(2)O养分的平均投入量分别为172.1、202.1、178.9 kg/hm^(2);追肥中,N、P_(2)O_(5)、K_(2)O养分的平均投入量分别为336.2、342.4、342.9 kg/hm^(2)。对烟台市苹果园的养分总投入量进行分级,N、P_(2)O_(5)、K_(2)O投入量合理的农户分别占23.5%、8.8%、26.5%。烟台市苹果园施肥主要的问题为有机肥投入不足,化肥N、P_(2)O_(5)、K_(2)O各养分投入过量,其中P_(2)O_(5)过量最为严重。

关键词：烟台市苹果园施肥有机肥化肥

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对大学生科研训练的几点思考

科教文汇 2015年第8期 183-184页

作者：于喜涛崔晓燕成建红中国农业大学(烟台) 山东烟台264670

创新型人才培养是21世纪高等教育研究的重要课题,大学生科研训练作为创新能力提高的重要途径在高校中以各种形式逐渐开展起来,作者结合自己在科研训练方面的管理经验,浅谈一下对大学生科研训练的若干思考。

关键词：高等教育科研训练创新能力

Effect of grit blasting and subsequent heat treatment on stress rupture property of a Ni-based single-crystal superalloy SGX3

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Acta Metallurgica Sinica(English Letters) 2020年第12期33卷 1681-1688页

作者： Jinshan He Zhengrong yu Longfei Li xitao Wang Qiang Feng Beijing Advanced Innovation Center for Material Genome Engineering Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Material Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

In the present study,the effect of grit blasting and subsequent heat treatment on the stress rupture properties of a thirdgeneration nickel-based single-crystal superalloy SGX3 sheet was *** was found that the stress rupture life of alloy SGX3 sheet at 980℃/250 MPa was reduced by about 60%by only vacuum heat treatment at 1100℃ for 200 h and further reduced by 20%and 70%respectively with grit blasting of 0.3 MPa/1 min and 0.5 MPa/2 min before heat *** microstructure analysis results indicated that the degradation of stress rupture life of alloy SGX3 sheet by vacuum heat treatment was mainly attributed to the variation ofγ/γ′microstructure,i.e.,the decrease inγ′volume fraction and the coarsening ofγ′***,such degradation by grit blasting and subsequent vacuum heat treatment should be attributed to the formation of cellular recrystallization with different thicknesses at the surface of alloy SGX3 sheet,which not only acts as the vulnerable site for cracks to initiate and propagate but also reduces the effective loading area.

关键词： Ni-based single-crystal superalloy Creep life Degradation Recrystallization

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职业英语技能竞赛常见问题分析及对策

北京工业职业技术学院学报 2017年第2期16卷 47-49页

作者：孙春晖于喜涛王承国宋玉娥烟台城乡建设学校山东烟台264004 中国农业大学烟台研究院山东烟台264670 北京工业职业技术学院电气与信息工程学院北京100042

2012年中等职业院校职业英语技能正式成为全国职业院校技能大赛赛项,大赛主要考察选手在职业环境下的英语语言交际能力和基本职业素质。结合自2012年以来连续4年辅导学生参加国赛的经验,分析选手在在线测评、情境交流、职场应用和职业风... 详细信息

2012年中等职业院校职业英语技能正式成为全国职业院校技能大赛赛项,大赛主要考察选手在职业环境下的英语语言交际能力和基本职业素质。结合自2012年以来连续4年辅导学生参加国赛的经验,分析选手在在线测评、情境交流、职场应用和职业风采4个竞赛环节中常见的问题,并给出相应的对策。

关键词：职业英语技能大赛英语交际能力职业素养

设施农业工程专业《自动控制原理》课程的教学研究

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农业网络信息 2016年第1期 111-113页

作者：王承国刘曙光于喜涛陈晓峰中国农业大学烟台研究院山东烟台264670

《自动控制原理》不仅是电类各相关学科的一门专业基础课,而且在农业工程、机械工程、能源动力工程、冶金工程等非电类专业的课程设置中也占有重要地位。《自动控制原理》课程理论性、逻辑性都很强,涉及多方面的数理知识,而且比较抽象,... 详细信息

《自动控制原理》不仅是电类各相关学科的一门专业基础课,而且在农业工程、机械工程、能源动力工程、冶金工程等非电类专业的课程设置中也占有重要地位。《自动控制原理》课程理论性、逻辑性都很强,涉及多方面的数理知识,而且比较抽象,是一门具有一定深度和难度的课程。在教学效果上,学生只是机械地记住了若干公式定理,面对具体问题的时候,不知如何运用相应的理论知识去解决实际问题。总结多年的教学经验以及结合农科院校实际,分析了该课程教学体系及实践环节存在的问题,提出了构建该课程立体化教学体系的思路和内涵。

关键词：自动控制原理教学改革实践双语教学

Rational design of high-quality 2D/3D perovskite heterostructure crystals for record-performance polarization-sensitive photodetection

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National Science Review 2021年第10期8卷 60-67页

作者： Xinyuan Zhang Lina Li Chengmin Ji xitao Liu Qing Li Kun Zhang yu Peng Maochun Hong Junhua Luo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University School of Chemistry and Chemical Engineering Jiangxi Normal University

Polarization-sensitive photodetection is central to optics applications and has been successfully demonstrated in photodetectors of two-dimensional(2D) materials, such as layered hybrid perovskites;however, achieving high polarization sensitivity in such a photodetector remains extremely ***, for the first time, we demonstrate a high-performance polarization-sensitive photodetector using single-crystalline 2D/3D perovskite heterostructure, namely,(4-AMP)(MA)2Pb3Br10/MAPbBr3(MA = methylammonium; 4-AMP = 4-(aminomethyl)piperidinium), which exhibits ultrahigh polarization sensitivity up to 17.6 under self-driven mode. To our knowledge, such a high polarization selectivity has surpassed all of the reported perovskite-based devices, and is comparable to, or even better than, the traditional inorganic heterostructure-based photodetectors. Further studies reveal that the built-in electric field formed at the junction can spatially separate the photogenerated electrons and holes, reducing their recombination rate and thus enhancing the performance for polarization-sensitive *** work provides a new source of polarization-sensitive materials and insights into designing novel optoelectronic devices.

关键词： polarization-sensitive photodetection hybrid perovskite single-crystalline heterostructure high polarization sensitivity