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SBA-15介孔分子筛表面的磺酸基改性及其催化性能

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催化学报 2002年第5期23卷 435-438页

作者：袁兴东沈健李国辉 ji-man kim Sang-Eon PARK 抚顺石油学院石油化工系辽宁抚顺113001 中国科学院山西煤炭化学研究所山西太原030001 韩国化学研究院

采用后合成方法 ,将含有巯基的化合物 3 巯丙基三甲氧基硅烷 (MPTMS)键合在大孔径、厚孔壁的新型纯硅介孔分子筛SBA 15表面上 ,经氧化和酸化后得到含有强酸性的磺酸基团的固体酸催化剂SBA 15 SO3 H .用X射线衍射、红外光谱、固体核磁... 详细信息

采用后合成方法 ,将含有巯基的化合物 3 巯丙基三甲氧基硅烷 (MPTMS)键合在大孔径、厚孔壁的新型纯硅介孔分子筛SBA 15表面上 ,经氧化和酸化后得到含有强酸性的磺酸基团的固体酸催化剂SBA 15 SO3 H .用X射线衍射、红外光谱、固体核磁共振及热失重等方法对改性前后的SBA 15样品进行了表征 .结果表明 ,改性后SBA 15分子筛的结构未发生变化 ,MPTMS键合于分子筛的表面 ,改性后的分子筛具有质子酸中心 .SBA 15 SO3 H催化剂对十八碳烯酸与甲醇的酯化反应具有较高的活性。

关键词：催化性能介孔分子筛 SBA-15 固体酸磺酸表面改性十八碳烯酸酯化甲醇十八碳烯酸甲酯

Synthesis and Characterization of Highly Ordered Mesoporous Materials

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Synthesis and Characterization of Highly Ordered Mesoporous ...

表面含磺酸基的介孔分子筛SBA-15-SO_3H的直接合成

全国第十七届大环化学暨第九届超分子化学学术研讨会

作者： Mingshi jin ji man kim Key Laboratory for Organism Resources of the Changbai Mountain and Functional Molecules(Yanbian University) and Department of ChemistryCollege of ScienceYanbian University Departement of Chemistry Sungkyunkwan University

＜正＞Recently,synthesis and application of various kinds of mesoporous materials have been attracted much attention in the fields of energy conversion and storage,catalysis,sensing,adsorption and separation[1].Especi... 详细信息

关键词： Mesoporous silica Mesoporous transition metal Oxides Mesoporous carbon Nanocasting method

来源： cnki会议评论

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催化学报 2003年第2期24卷 83-86页

作者：袁兴东沈健李国辉周敬来 ji-man kim Sang-Eon Park 抚顺石油学院石油化工系辽宁抚顺113001 中国科学院山西煤炭化学研究所山西太原030001 韩国化学研究院分子工程催化中心

采用水热法直接合成了含磺酸基的介孔分子筛SBA 15 SO3H .XRD表征结果表明 ,该分子筛具有规则的、六方立柱形的中孔结构 ,通过酸碱滴定和XRD确定了正硅酸乙酯 /有机硅的最佳合成配比为 9(α =0 1) .2 9SiMASNMR固体核磁结果表明 ,含... 详细信息

采用水热法直接合成了含磺酸基的介孔分子筛SBA 15 SO3H .XRD表征结果表明 ,该分子筛具有规则的、六方立柱形的中孔结构 ,通过酸碱滴定和XRD确定了正硅酸乙酯 /有机硅的最佳合成配比为 9(α =0 1) .2 9SiMASNMR固体核磁结果表明 ,含磺酸基的有机基团Si (CH2 ) 3 SO3H中的硅与SBA 15骨架上的氧通过Si O键结合 ,形成稳定的有机 /无机组成 ,FT IR谱表明 :在SBA 15 SO3H表面含有质子酸中心 SO3H .N2 吸附脱附和TEM结果表明 ,SBA 15 SO3H具有较大的比表面积、孔容和孔径 ,孔大小是单一的 ,孔分布是高度有序的 .酯化反应结果表明 ,与后合成法相比 ,直接法合成的催化剂既具有较高的稳定性 ,又具有简便。

关键词：磺酸介孔分子筛 SBA-15-SO3H 直接合成 SBA-15分子筛固体酸表面改性多相催化剂

Aligned Ion Conduction Pathway of Polyrotaxane‑Based Electrolyte with Dispersed Hydrophobic Chains for Solid‑State Lithium–Oxygen Batteries

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Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram kim Myeong‑Chang Sung Gwang‑Hee Lee Byoungjoon Hwang Sojung Seo ji‑Hun Seo Dong‑Wan kim Department of Materials Science and Engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of Civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical Engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

介孔有机硅分子筛PMO-SO_3H的合成及催化性能

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石油化工 2003年第11期32卷 929-932页

作者：杨丽娜袁兴东亓玉台沈健金知晚哈尔滨工业大学应用化学系黑龙江哈尔滨150001 辽宁石油化工大学石油化工系辽宁抚顺113001 韩国亚洲大学分子科技系

在碱性和水热条件下,以十八烷基三甲基氯化胺(ODTMA)为模板剂、有机硅为硅源,合成出含磺酸基的介孔有机硅分子筛PMO-SO3H。分别进行了XRD、红外光谱和TGA分析,并用N2吸附-脱附法测定其比表面积和孔分布,同时进行了苯酚烷基化反应。结果... 详细信息

在碱性和水热条件下,以十八烷基三甲基氯化胺(ODTMA)为模板剂、有机硅为硅源,合成出含磺酸基的介孔有机硅分子筛PMO-SO3H。分别进行了XRD、红外光谱和TGA分析,并用N2吸附-脱附法测定其比表面积和孔分布,同时进行了苯酚烷基化反应。结果表明,磺酸基摩尔分数高达0.15时,仍然具有介孔分子筛MCM-41的完整晶体结构;比表面积和孔径随磺酸基含量的增加而降低,磺酸基摩尔分数为0.25时,比表面积和孔径仍保持较高值;含磺酸基的介孔分子筛比沸石分子筛催化剂具有更高的活性,介孔有机硅分子筛比介孔硅基分子筛具有更高的水热稳定性;磺酸基在分子筛表面的最佳摩尔分数为0.15。

关键词：介孔有机硅分子筛固体酸磺酸表面改性多相催化剂烷基化合成催化性能

Endpoint Estimates of Generalized Homogeneous Littlewood–Paley g-functions over Non-Homogeneous Metric Measure Spaces

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Acta Mathematica Sinica,English Series 2016年第9期32卷 1035-1074页

作者： Xing FU ji man ZHAO School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education Beijing 100875 P. R. China

Let （x, d,u） be a metric measure the upper doubling conditions. Under the weak space satisfying both the geometrically doubling and reverse doubling condition, the authors prove that the generalized homogeneous Littlewood-Paley g-function gr （r ∈ [2, ∞）） is bounded from Hardy space H1（u） into L1（u）. Moreover, the authors show that, if f ∈ RBMO（u）, then [gr（f）]r is either infinite everywhere or finite almost everywhere, and in the latter case, [gr（f）]r belongs to RBLO（u） with the norm no more than ｜｜f｜｜ RBMO（u） multiplied by a positive constant which is independent of f. As a corollary, the authors obtain the boundedness of gr from RBMO（u） into RBLO（u）. The vector valued Calderon-Zygmund theory over （X, d, u） is also established with details in this paper.

关键词： Non-homogeneous metric measure space generalized homogeneous Littlewood-Paley g-function Hardy space RBMO(u) RBLO(u) vector valued Calderon Zygmund theory

Littlewood–Paley Operators on Spaces with Variable Exponent on Homogeneous Groups

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Acta Mathematica Sinica,English Series 2020年第5期36卷 535-558页

作者： Dong Li LIU ji man ZHAO Key Laboratory of Mathematics and Complex Systems Ministry of Education Institution of Mathematics and Mathematical Education School of Mathematical SciencesBeijing Normal UniversityBeijing 100875P.R.China

In this paper,on homogeneous groups,we study the Littlewood–Paley operators in variable exponent ***,we prove that the weighted Littlewood–Paley operators are controlled by the weighted Hardy–Littlewood maximal function,and obtain the vector-valued inequalities of the Littlewood–Paley operators,including the Lusin function,Littlewood–Paley g function and gλ* ***,we prove the boundedness of multilinear Littlewood–Paley gψ,λ* function.

关键词： Littlewood–Paley operators variable Lebesgue spaces homogeneous groups

Objective Evaluation Method of Steering Comfort Based on Movement Quality Evaluation of Driver Steering maneuver

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Chinese Journal of Mechanical Engineering 2014年第5期27卷 1027-1037页

作者： YANG Yiyong LIU Yahui WANG man ji Run ji Xuewu School of Engineering and Technology China University of Geosciences(Beijing) State Key Laboratory of Automotive Safety and Energy Tsinghua University National Research Center for Rehabilitation Technical Aids

The existing research of steering comfort mainly focuses on the subjective evaluation,aiming at designing and optimizing the steering *** the development of steering system,especially the evaluation of steering comfort,the objective evaluation methods considered the kinematic characteristics of driver steering maneuver are not proposed,which means that the objective evaluation of steering cannot be conducted with the evaluation of kinematic characteristics of driver in steering *** order to propose the objective evaluation methods of steering comfort,the evaluation of steering movement quality of driver is developed on the basis of the study of the kinematic characteristics of steering ***,the steering motion trajectories of the driver in both comfortable and certain extreme uncomfortable operation conditions are detected using the Vicon motion capture *** operation conditions are under the restrictions of the vertical height and horizontal distance between steering wheel center and the H-point of driver,and the steering resisting torque ***,the movement quality evaluation of driver steering maneuver is assessed using twelve kinds of evaluation indices based on the kinematic analyses of the steering motion trajectories to propose an objective evaluation ***,an integrated discomfort index of steering maneuver is proposed on the basis of the regression analysis of subjective evaluation rating and the movement quality evaluation indices,including the Jerk,Discomfort and Joint Torque *** test results show that the proposed integrated discomfort index gives a good fitting with the subjective evaluation of discomfort,which means it can be used to evaluate or predict the discomfort level of steering *** paper proposes an objective evaluation method of steering comfort based on the movement quality evaluation of driver steering maneuver.

关键词： steering maneuver movement quality evaluation driver discomfort

Robust fault detection of piecewise affine ARX systems

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Journal of Control and Decision 2020年第3期7卷 276-285页

作者： Young-man kim School of Engineering Liberty University1971 University Blvd.LynchburgVAUSA

In this paper,l1 regularisation-based robust fault detection technique for PWARX(PieceWise affine Auto Regressive eXogenous)systems is *** problem is formulated in convex optimisation form using l1 regularisation hence,global solution can be *** regularisation constant plays a key role for finding the number of *** MSE(mean square error)value between actual system and its model under no fault is used as a threshold for tracking dynamics change and detecting *** simplicity of turning only one parameter(regularisation constant)outstands this approach from *** proposed algorithm also shows the capability of separating the dynamics change from additive fault under *** illustration concludes this proposal by demonstrating its effectiveness.

关键词： Piecewise affine ARX fault detection regularisation convex optimisation sparsity