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Holey graphene oxide-templated construction of nano nickel-based metal–organic framework for highly efficient asymmetric supercapacitor

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Nano Research 2022年第10期15卷 9047-9056页

作者： Hang Wang Pengfei Zhao Xingmao Zhang Su Zhang Xiaolong Lu Zhipeng Qiu kang ren Zheng Xu Ruxin Yao Tong Wei Zhuangjun Fan State Key Laboratory of Heavy Oil Processing School of Materials Science and EngineeringChina University of PetroleumQingdao 266580China Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and CultureSchool of Chemistry&Material ScienceShanxi Normal UniversityTaiyuan 030006China

Metal–organic frameworks(MOFs)with redox-active metal sites and controllable crystalline structures make it possible to access the merits of highly-efficient electrode materials in electrochemical energy storage ***,most MOFs suffer from low capacitance and poor cycling stability that largely thwart their ***,we present the holey graphene oxide(HGO)template strategy to prepare nano two-dimensional Ni(BDC)with HGO as both template and capping agent(denoted as Ni(BDC)-HGOx,x=10,20,30,and 40 according to the added HGO amount).Structural analyses reveal that HGO can significantly inhibit the Ni(BDC)agglomeration,thus offering a high ion-accessible surface ***(BDC)-HGO30 with well-exposed active sites exhibits a high capacitance of 1,115.6 F·g^(−1) at 1 A·g^(−1) in 6 M KOH aqueous,1.8 times that of bulk Ni(BDC).An asymmetric supercapacitor with Ni(BDC)-HGO30 as a positive electrode and activated carbon as the opposing electrode delivers an energy density of 52.5 W·h·kg^(−1) and a power density up to 18.0 kW·kg−1,with 92.5%capacitance retention after 10,000 *** intermittent titration technique and in situ electrochemical–Raman measurements were exploited to elucidate the electrochemical behavior of Ni(BDC)-*** results pave the way for the development of rationally tuned MOF materials for enhancing supercapacitor performances.

关键词： holey graphene oxide templated construction nano MOFs supercapacitor

Novel Phosphonoacetic Acid *** of N-(Ethoxycarbonylmethylphosphonyl)-α-Amino Esters and-α-Amino Phosphonic Acid Esters and Their Bioactivities

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Chinese Chemical Letters 1997年第12期8卷 0-0,0-0页

作者： Hui Ying LI kang Tai ren Ru Yu CHEN(Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071) Inst. of Elemento-Organic Chemistry Nankai University Tianjin 300071 China

A series of novel phosphonoacetic acid derivatives, N-(ethoxycarbonylmethy-ethoxyphosphonyl)-α-amino acid esters and α-amino phosphonates, were synthesized via the reaction of the corresponding phosphonyl chloride with amino acid ester hydrochlorides or amino phosphonates in the presence of a base. The preliminary bioassay shows that some compounds show significant anti-viral activity against tobacco mosaic virus (TMV)

关键词： Novel Phosphonoacetic Acid Derivatives.Synthesis of N cm PN Amino Phosphonic Acid Esters and Their Bioactivities Ethoxycarbonylmethylphosphonyl Amino Esters and

Two-dimensional simulation on the rolling process of semi-solid 60Si2Mn by finite element method

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Journal of University of Science and Technology Beijing 2002年第4期9卷 273-276页

作者： renbo Song, Yonglin kang, Xueping ren, Hongbo Dong, and Jiwen WangMaterials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China Mat. Sci. and Eng. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The effect of various process variables on the law of metal flow for semi-solid rolling 60Si2Mn was studied by finite element method. Semi-solid 60Si2Mn can be described as compressible rigid visco-plastic porous material saturated with liquid. In terms of ther-mo-mechanical coupling condition, the distributions of stress, velocity and temperature were studied using software MARC. The simulation results show that the rigid visco-plastic model can accurately describe the semi-solid 60Si2Mn rolling process. The great deformation can achieve completely in view of low flow stress of semi-solid slurry.

关键词： finite-element analysis semi-solid thermo-mechanical coupling compressible rigid visco-plastic model rolling

Free Surface Flow Generated by Submerged Twin-cylinders in Forward Motion Using a Fully Nonlinear Method

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Journal of Marine Science and Application 2015年第2期14卷 146-155页

作者： kang ren Shili Sun School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China College of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China

The free surface flow generated by twin-cylinders in forced motion submerged beneath the free surface is studied based on the boundary element method. Two relative locations, namely, horizontal and vertical, are examined for the twin cylinders. In both cases, the twin cylinders are starting from rest and ultimately moving with the same constant speed through an accelerating process. Assuming that the fluid is inviscid and incompressible and the flow to be irrotational, the integral Laplace equation can be discretized based on the boundary element method. Fully-nonlinear boundary conditions are satisfied on the unknown free surface and the moving body surface. The free surface is traced by a Lagrangian technique. Regriding and remeshing are applied, which is crucial to quality of the numerical results. Single circular cylinder and elliptical cylinder are calculated by linear method and fully nonlinear method for accuracy checking and then fully nonlinear method is conducted on the twin cylinder cases, respectively. The generated wave elevation and the resultant force are analysed to discuss the influence of the gap between the two cylinders as well as the water depth. It is found that no matter the kind of distribution, when the moving cylinders are close to each other, they suffer hydrodynamic force with large absolute value in the direction of motion. The trend of force varying with the increase of gap can be clearly seen from numerical analysis. The vertically distributed twin cylinders seem to attract with each other while the horizontally distributed twin cylinders are opposite when they are close to each other.

关键词： free surface flow submerged twin cylinders fullynonlinear method forced steady motion boundary element method

Immunoassay of chemical contaminants in milk:A review

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Journal of Integrative Agriculture 2015年第11期14卷 2282-2295页

作者： XU Fei ren kang YANG Yu-ze GUO Jiang-peng MA Guang-peng LIU Yi-ming LU Yong-qiang LI Xiu-bo National Feed Drug Reference Laboratories Feed Research InstituteChinese Academy of Agricultural Sciences Beijing General Station of Animal Husbandry China Rural Technology Development Center Ministry of Science and Technology of China

The detection of chemical contaminants is critical to ensure dairy safety. These contaminants include veterinary medicines, antibiotics, pesticides, heavy metals, mycotoxins, and persistent organic pollutants （POPs）. Immunoassays have recently been used to detect contaminants in milk because of their simple operation, high speed, and low cost. This article describes the latest developments in the most important component of immunoassays--antibodies, and then reviews the four major substrates used for immunoassays （i.e., microplates, membranes, gels, and chips） as well as their use in the detection of milk contaminants. The paper concludes with prospects for further aDDlications of these immunoassavs.

关键词： milk chemical contaminants immunoassay antibodies

Saline Water Irrigation Scheduling Through a Crop-Water-Salinity Production Function and a Soil-Water-Salinity Dynamic Model

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Pedosphere 2007年第3期17卷 303-317页

作者： WANG Yang-ren kang Shao-Zhong LI Fu-Sheng ZHANG Lu ZHANG Jian-Hua Center for Agricultural Water Research in China China Agricultural University Beijing 100083 （China） Department of Water Conservancy Engineering Tianjin Agricultural University Tianjin 300384 （China） Agricultural College Guangxi University Nanning 530005 （China） CSIRO Land and-Water GPO Box 1666 Canberra ACT 2601 （Australia） Department of Biology Hong Kong Baptist University Kowloon Tang Hong Kong （China）

Using a crop-water-salinity production function and a soil-water-salinity dynamic model, optimal irrigation scheduling was developed to maximize net return per irrigated area. Plot and field experiments were used to obtain the crop water sensitivity index, the salinity sensitivity index, and other parameters. Using data collected during 35 years to calculate the 10-day mean precipitation and evaporation, the variation in soil salinity concentrations and in the yields of winter wheat and cotton were simulated for 49 irrigation scheduling that were combined from 7 irrigation schemes over 3 irrigation dates and 7 salinity concentrations of saline irrigation water (fresh water and 6 levels of saline water). Comparison of predicted results with irrigation data obtained from a large area of the field showed that the model was valid and reliable. Based on the analysis of the investment cost of the irrigation that employed deep tube wells or shallow tube wells, a saline water irrigation schedule and a corresponding strategy for groundwater development and utilization were proposed. For wheat or cotton, if the salinity concentration was higher than 7.0 g L-1 in groundwater, irrigation was needed with only fresh water; if about 5.0 g L-1, irrigation was required twice with fresh water and once with saline water; and if not higher than 3.0 g L-1, irrigation could be solely with saline water.

关键词： crop-water-salinity production function irrigation scheduling saline water irrigation water-salinity dy- namic model

A Novel Nucleophilic Substitution of 3-Halo-6-phenoxypyridazines

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Chinese Chemical Letters 1999年第1期10卷 13-14页

作者： kang Tat ren Hut Ying LI Jun QI Hong Hai SONG Xiang WANG Hua Zheng YANG(Institute of Elemento-Organic Chemistry,State Key Laboratory of Elemento-Organic Chemistry, Tianjin, 300071) Inst. of Elemento-Organic Chemistry State Key Lab. Elemento-Organ. Chem. Tianjin 300071 China

A novel nucleophilic substitution of pyridazines is found, in which phenoxy group is dislodged rather than the halogen atom, on treating 3-halo-6-phenoxypyridazines with alkoxy anion. The reactivity of substituents on benzene ring and the halogen atom of pyridazines are studied. Reasonable explanation based on the quantum chemical calculations are given.

关键词： nucleophilic substitution 3-halo-6-phenoxypyridazines mechanisms

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基于小波分析的母线负荷预测不良数据检测

中国电力 2011年第8期44卷 5-8页

作者：康仁甘肃省电力公司天水供电公司甘肃天水741000

母线负荷预测是电力系统调度运行的重要基础,而母线负荷预测中可能存在较多的不良数据,极大地影响预测精度。以准确检测母线负荷预测中的不良数据为目标,分析不良数据的来源,指出了数据奇异点与不良数据的关系,提出了基于小波分析理论... 详细信息

母线负荷预测是电力系统调度运行的重要基础,而母线负荷预测中可能存在较多的不良数据,极大地影响预测精度。以准确检测母线负荷预测中的不良数据为目标,分析不良数据的来源,指出了数据奇异点与不良数据的关系,提出了基于小波分析理论进行不良数据检测的方法。理论分析表明,该方法具有完整、精确、准确及简单的特点,通过实验证明了该方法能够很好地识别增幅点、降幅点、突变点等典型的不良数据,有效提高预测精度。希望能够对母线负荷预测工作提供有益的参考。

关键词：母线负荷预测不良数据小波分析检测

QUANTUM CHEMICAL CALCULATIONS ON THE ELECTRONIC STRUCTURE AND SPECTRA OF[Mo_3O_4-nSn]^(4+)(n=O-4)CLUSTER CATIONS

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Chinese Chemical Letters 1992年第1期3卷 43-46页

作者： Zhi Ru LI Qian Shu LI Ji kang FANG Zhi ren ZHENG Jun ZHENG Department of Chemistry,Jilin University,Changchun,130023

The electronic structure and spectra of [Mo3O4-nSn]^(4+)(n=0-4) cations were calculated by means of INDO/CI quantum chemistry method to account for the experimental data of their spectra in water solutions.

关键词： HOMO n=O-4)CLUSTER CATIONS Ho LUMO n QUANTUM CHEMICAL CALCULATIONS ON THE ELECTRONIC STRUCTURE AND SPECTRA OF[Mo3O4-nSn Mo