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Journal of Energy Chemistry 2024年第5期92卷 311-321页

作者： Shuang Luo Tie Shu Min Mao Haijie Yu Yuxin Zheng Daqian Ding lingmei liu Kexin Yao Jianjian Wang School of Chemistry and Chemical Engineering State Key Laboratory of Coal Mine Disaster Dynamics and ControlInstitute of Advanced Interdisciplinary StudiesMulti-scale Porous Materials CenterChongqing UniversityChongqing 401331China Key Laboratory for Efficient Conversion and Circular Economy of Coal Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot 010051Inner MongoliaChina

Selective conversion of fructose to 1,2-propanediol(1,2-PDO)is considered as a sustainable and cost-effective alternative to petroleum-based processes,however,this approach still faces challenges associated with low efficiency and harsh reaction ***,we have successfully synthesized a novel bifunctional Ru-WO_(x)-MgO_(y) catalyst through a facile'one-pot'solvothermal ***,this catalyst exhibits exceptional catalytic performances in the conversion of fructose to 1,2-PDO under mild reaction *** yield of 1,2-PDO is up to 56.2%at 140°C for 4 h under an ultra-low hydrogen pressure of only 0.2 MPa,surpassing the reported results in recent literature(below 51%).Comprehensive characterizations and density functional theory(DFT)calculations reveal that the presence of oxygen vacancies in the Ru-WO_(x)-MgO_(y) catalyst,serving as active acidic sites,facilitates the chemoselective cleavage of C-C bonds in fructose,which leads to the generation of active intermediates and ultimately resulted in the high yield of 1,2-PDO.

关键词： Biomass Fructose 1,2-Propanediol Retroaldol condensation Heterogenous catalysis

氯乙烯光催化氟化联合合成HFC-152a和HCFC-142b后处理工艺的研究

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中国氯碱 2024年第6期 18-20,24页

作者：刘岭梅上海氯碱化工股份有限公司上海

根据氯乙烯光催化氟化联合合成HFC-152a和HCFC-142b反应产物的特点,设计了工艺成熟、流程合理的后处理工艺,并提出了各工序的技术要点。

关键词：氯乙烯 HFC-152a HCFC-142b 后处理工艺

村庄空间形态结构与地震及次生地质灾害影响因子的关联性研究——以鲁甸县龙头山镇为例

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灾害学 2024年第3期39卷 178-186页

作者：刘玲梅王培茗张泽宁云南大学建筑与规划学院云南昆明650500

为促进村庄更好选址布局与建设,该文运用GIS技术、分形几何学、空间句法等方法,研究了鲁甸县龙头山镇村庄空间形态结构与地震及次生地质灾害影响因子的关联性。结果表明:①村庄所处岩层越硬越厚、地势越平坦、距公路越近、距最近居民点... 详细信息

为促进村庄更好选址布局与建设,该文运用GIS技术、分形几何学、空间句法等方法,研究了鲁甸县龙头山镇村庄空间形态结构与地震及次生地质灾害影响因子的关联性。结果表明:①村庄所处岩层越硬越厚、地势越平坦、距公路越近、距最近居民点越远的区域,村庄建设受限越小村庄形态越复杂。②村庄所处距震中越近、岩层越软越薄、地势越陡峭崎岖、受邻村居民影响越大的区域,村庄紧凑度越高。③村庄建筑长轴方向平行于地震断裂带的数量相对较多,人们利用建筑刚度较大的长轴方向来应对地震产生的较大能量,从而减轻建筑受损程度。④村庄距最近一次地震震中越近、岩层越软越薄、地势越陡峭崎岖、距公路越近,其地质灾害隐患点越多,村庄道路越曲折越复杂。

关键词：村庄形态村庄空间结构地震及次生地质灾害影响因子关联性龙头山镇

Low-Dose Electron Microscopy Imaging of Electron Beam-Sensitive Crystalline Materials

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Accounts of Materials Research 2022年第5期3卷 552-564页

作者： Jia Lv Hui Zhang Daliang Zhang lingmei liu Yu Han Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 400044P.R.China Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

As one of the most widely used characterization tools in materials science,(scanning)transmission electron microscopy((S)TEM)has the unique ability to directly image specimens with atomic *** to diffraction-based techniques,the main advantage of(S)TEM imaging is that in addition to the periodic average structures of crystalline materials,it can be used to probe nonperiodic local structures such as surfaces,interfaces,dopants,and defects,which have crucial impacts on material ***,many crystalline materials are extremely sensitive to electron beam irradiation,which can only withstand dozens(or even fewer)of electrons per square angstrom before they undergo structural *** using electron doses lower than the thresholds can in principle preserve their structures,the thus acquired images are too noisy to be ***,high-resolution imaging of the inherent structures of such electron beam-sensitive materials using(S)TEM is a longstanding *** recent years,the advances in electron detectors and image-acquisition methods have enabled high-resolution(S)TEM with ultralow electron doses,largely overcoming this challenge.A series of highly electron beam-sensitive materials that are traditionally considered impossible to be imaged with(S)TEM,including metal organic frameworks(MOFs),covalent organic frameworks(COFs),organic−inorganic hybrid halide perovskites,and supramolecular crystals,have been successfully imaged at atomic *** technological advance has greatly expanded the application range of electron *** Account focuses on our recent works pertaining to the high-resolution imaging of electron beam-sensitive materials using very low electron *** first explain that the use of direct-detection electron-counting(DDEC)cameras provides the hardware basis for successful low-dose high-resolution TEM(HRTEM).Subsequently,we introduce a suite of methods to address the challenges peculiar to low-d

关键词： Electron crystalline precise

Huge Market Potential of Matt PVC Resin

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China Chemical Reporter 2009年第10期20卷 21-21页

作者： liu lingmei

China’s PVC(polyvinyl chloride)sector hasdeveloped rapidly in recent *** aremore than 100 PVC producers in China todayand the production capacity of generalpurpose PVC resin already reached more than15.0 million t/a by the end of *** domestic supply of PVC is surplus,and the competition is therefore quite ***’s PVC sector should accelerate

关键词： sector polyvinyl surplus resin accelerate competit

PVDC Has Broad Market Prospects

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China Chemical Reporter 2007年第9期18卷 21-21页

作者： liu lingmei

Polyvinyhdene chloride resin (PVDC) isa copolymer with vinylidene chloridemonomer as major component,broadlyapplied in fields such as food *** PVDC productscan help to balance the excess chlorinemade in the chlor-alkali industry,andhelp manufacturers improve perfor-mance and competitive *** products include emulsion andresin *** emulsion can be di-rectly coated on the surface of *** PVDC emulsion iswater soluble,it is easy to use,safe *** it is broadly appliedin packaging by the tobacco,food andmedicine industries.

关键词： PVDC packaging emulsion copolymer competitive thou

Facile Exfoliation of Two-Dimensional Crystalline Monolayer Nanosheets from an Amorphous Metal-Organic Framework

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CCS Chemistry 2022年第6期4卷 1879-1888页

作者： Jiahui Wang Pengfei Yang lingmei liu Bin Zheng Jing Jiang Jian-ping Ma Yi Yan Song Yang Luo Yang Qi-Kui liu Yu Han Yin Chen College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083 Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal 23955-6900 Multi-Scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 400044 School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an 710054 College of Chemistry Chemical Engineering&Materials ScienceKey Laboratory of Molecular and Nano ProbesMinistry of EducationCollaborative Innovation Centre of Functionalized Probes for Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan 250014 College of Chemistry Xiangtan UniversityXiangtan 411105 Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety Changsha 410083

The large-scale preparation ofmonolayer two-dimensional(2D)material remains a great challenge,which hinders its real-world ***,we report a novel layered metal–organic framework(MOF),IPM-1,whichwas synthesized froma cage-like organic linker,with extremely weak interlaminar *** subjected to external disturbance,IPM-1 degenerated into an intermediate state between the crystalline and amorphous phase,in which the layers retain the inplane two-dimensional periodic structure but aremisaligned in the third dimension,leading to the loss of apparent porosity and *** amorphous IPM-1 is readily exfoliated at gramscale into crystalline 2D nanosheets with a thickness of 1.15 nm,excellent thickness homogeneity,lateral size up to 10μm,and restored ***-1 nanosheets exhibit high chemical stability and catalytic activity in the oxidation of alcohol,combining the advantages of both homogeneous and heterogeneous *** work underscores that MOFs without apparent crystallinity can be ideal precursors for the successful preparation of 2D crystalline monolayer nanosheets.

关键词： cage molecule intermediate phase supramolecular assembly monolayer nanosheet liquid exfoliation

Marine Yeasts and Their Applications in Mariculture

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Journal of Ocean University of China 2006年第3期5卷 251-256页

作者： CHI Zhenming liu Zhiqiang GAO lingmei GONG Fang MA Chunling WANG Xianghong LI Haifeng UNESCO Chinese Center of Marine Biotechnology Ocean University of China Qingdao 266003 P. R. China

The terrestrial yeasts have been receiving great attention in science and industry for over one hundred years because they can produce many kinds of bioactive substances. However, little is known about the bioactive substances of marine yeasts. In recent years, it has been found that marine yeasts have wide applications in mariculture and other fields. Therefore,marine yeasts, the bioactive substances from them and the applications of marine yeasts themselves and the bioactive substances they produced are reviewed in this paper.

关键词： marine yeasts bioactive substances mariculture single cell protein

Catalytically active atomically thin cuprate with periodic Cu single sites

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National Science Review 2023年第1期10卷 226-235页

作者： Huimin Yang Shibo Xi Na Guo Mu Wang lingmei liu Pin Lyu Xiaolong Yu Jing Li Haomin Xu Xiao Hai Zejun Li Xinzhe Li Tao Sun Xiaoxu Zhao Yu Han Wei Yu Jie Wu Chun Zhang Honghan Fei Ming Joo Koh Jiong Lu Department of Chemistry National University of Singapore Institute of Chemical and Engineering Sciences Department of Physics National University of Singapore Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology SDU-ANU Joint Science College Shandong University School of Materials Science and Engineering Peking University Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore Department of Chemistry Tongji University

Rational design and synthesis of catalytically active two-dimensional(2D) materials with an abundance of atomically precise active sites in their basal planes remains a great ***,we report a ligand exchange strategy to exfoliate bulk [Cu4(OH)6] [O3S(CH2)4SO3] cuprate crystals into atomically thin 2D cuprate layers([Cu2(OH)3]+).The basal plane of 2D cuprate layers contains periodic arrays of accessible unsaturated Cu(Ⅱ) single sites(2D-CuSSs),which are found to promote efficient oxidative Chan-Lam *** me chanistic studies reveal that the reactions proceed via coordinatively unsaturated CuO4(Ⅰ) single sites with the formation of Cu(Ⅰ) species in the rate-limiting step,as corroborated by both operando experimental and theoretical *** robust stability of 2D-CuSSs in both batch and continuous flow reactions,coupled with their recyclability and good performance in complex molecule derivatization,render 2D-CuSSs attractive catalyst candidates for broad utility in fine chemical synthesis.

关键词： exfoliation nanosheet heterogeneous catalysis

国外基于语料库的隐喻研究:方法、问题与展望

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外语教学理论与实践 2017年第1期 36-40,21页

作者：柳超健曹灵美苏州大学浙江传媒学院上海财经大学浙江学院

语料库方法与隐喻理论相结合近年来已发展成为隐喻研究领域中的主流趋势。该方法为隐喻研究提供了实证性理据的支撑,拓宽了隐喻研究的范围,在一定程度上克服了早期隐喻研究在方法论层面的诸多缺陷与不足。然而这一研究范式在语料收集与... 详细信息

语料库方法与隐喻理论相结合近年来已发展成为隐喻研究领域中的主流趋势。该方法为隐喻研究提供了实证性理据的支撑,拓宽了隐喻研究的范围,在一定程度上克服了早期隐喻研究在方法论层面的诸多缺陷与不足。然而这一研究范式在语料收集与识别等方面依然受到学界的质疑与挑战,具体表现在语料的检索方法、语料的代表性与平衡性及语料的间接性方面的问题。文章对这些问题进行了系统梳理与分析,并对未来的语料库隐喻研究提出了相关建议。

关键词：隐喻语料库语料检索隐喻识别