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Journal of Wuhan University of Technology(Materials Science) 2021年第3期36卷 318-330页

作者： SHI Jinrong ZHAN Zhigang ZHANG Di YU Yuan YANG Xiaoxiang he luyan PAN Mu Foshan Xianhu Laboratory Foshan 528000China State Key Laboratory of Advanced Technology for Materials Synthesis and Pro-cessing Wuhan University of TechnologyWuhan 430070China

A two-dimensional geometric model is developed for a polymer electrolyte based on the liquid water penetration mechanism in the membrane electrode assemblies under the action of capillary *** effects of the diameter,number,and distribution of cracks in the micro-pore layers(MPLs)of the modeled MEA on the performance of the PEMFC are simulated to investigate the influence of mass transfer across the *** results indicate that liquid water in the catalyst layer(CL)of the MEA can be discharged to gas channels through the cracks in MEA under the action of capillary pressure,thereby alleviating the flooding in the CL and enhancing the diffusion of oxygen to the *** the proportion of the total area of cracks in the active area of the MEA was 8%-12%,crack diameter was 20-30μm,and cracks were distributed *** with and without cracks were prepared,fuel cells were assembled,and their performance was *** effects of cracks on mass transfer were then *** study helps prepare MEAs with controllable cracks.

关键词： PEMFC MEA cracking liquid saturation oxygen concentration transfer

Sulfonamide and Morpholine-Based Dual Chemosensor for Cu^2＋ and Ag^＋ in Different Solvent Media

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Chinese Journal of Chemistry 2016年第9期34卷 931-936页

作者： Fang Hu Rui Li Jinjian Wang luyan he Xing Li Jun Yin Shenghua Liu School of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University Wuhan Hubei 430079 China

The detection of cations has attracted considerable interest because of their importance in various physiological processes. In this study, compound 1 bearing sulfonamidc and morpholine functionalities was synthesized. Its structure was well characterized by NMR spectroscopy and mass spectrometry. UV/vis absorption spectra and fluorescence spectra indicated that it displayed high sensitivity and selectivity for Cu^2＋ and Ag^＋ by switching solvent media. It means that：（1） it showed selective response to Cu2＋ in acetonitrile, （2） whereas it exhibited high selectivity for Ag^＋ in water. The density functional theory calculations were used to clearly explain the different recognition behaviors in different solvent media. This research suggests that compound 1 bearing sulfonamide and morpholine functionalities could act as a multiftmctional chemosensor for monitoring multiple cations by changing solvent media and provides an alternative approach to design novel dual cations chemosensors.

关键词： sulfonamide morpholine multifunctional chemosensor cation density functional theory

滇东菌子山喀斯特森林群落乔木优势树种生态位和种间联结

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应用生态学报 2023年第7期34卷 1771-1778页

作者：刘雨婷侯满福贺露炎唐伟赵俊广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室/漓江流域景观资源可持续利用广西重点实验室广西桂林541004 广西师范大学环境与资源学院广西桂林541004 师宗县林业和草原局云南师宗655700

为揭示滇东菌子山喀斯特森林树种的种间关系,基于样方调查数据,运用生态位测定、χ^(2)检验、联结系数(AC)、Spearman秩相关检验等方法研究了乔木优势树种生态位和种间联结性。结果表明:滇青冈生态位宽度最大,胡桃楸生态位宽度最小;生... 详细信息

为揭示滇东菌子山喀斯特森林树种的种间关系,基于样方调查数据,运用生态位测定、χ^(2)检验、联结系数(AC)、Spearman秩相关检验等方法研究了乔木优势树种生态位和种间联结性。结果表明:滇青冈生态位宽度最大,胡桃楸生态位宽度最小;生态位宽度与频度的排序比与重要值的排序更一致。乔木优势树种生态位重叠程度总体较低,平均值为0.21,物种对环境资源利用相似性较低。乔木优势树种的总体联结性为显著正联结,正负联结比为1.07,群落总体上处于相对稳定的演替后期。乔木优势树种的χ^(2)检验、Spearman秩相关检验结果显示,65.3%的种对间呈不显著联结,种间联结性较弱。物种间联结系数(AC)、Spearman秩相关系数与相应生态位重叠指数间均呈极显著正相关。滇青冈⁃多脉猫乳、球核荚蒾⁃大叶臭花椒、小花香槐⁃山羊角树、大叶臭花椒⁃小花香槐等种对联结性强、生态位宽,在滇东及邻近喀斯特生态恢复中有较好的潜在应用价值。

关键词：种间联结生态位种对喀斯特森林

亚热带岩溶森林类型和坡位对碳酸盐岩溶蚀的影响

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中国岩溶 2023年第4期42卷 842-852页

作者：侯满福刘雨婷张杰贺露炎梁江弈广西师范大学环境与资源学院广西桂林541004 珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学) 广西桂林541004 内江师范学院地理与资源科学学院四川内江641100 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室吉林长春130102

文章采用标准溶蚀试片法对比两种亚热带岩溶森林不同坡位的碳酸盐岩溶蚀速率,并分析其与土壤CO_(2)含量(pCO_(2))和土壤含水量的对应关系。结果表明:青冈林的平均溶蚀速率(5.22±0.99 mg·cm^(−2)·a^(−1))显著高于化香树林(3.58±2.59... 详细信息

文章采用标准溶蚀试片法对比两种亚热带岩溶森林不同坡位的碳酸盐岩溶蚀速率,并分析其与土壤CO_(2)含量(pCO_(2))和土壤含水量的对应关系。结果表明:青冈林的平均溶蚀速率(5.22±0.99 mg·cm^(−2)·a^(−1))显著高于化香树林(3.58±2.59 mg·cm^(−2)·a^(−1));青冈林的土下溶蚀速率在垂直剖面上先增加后递减,峰值位于土下20 cm,而化香树林的随土壤深度增加而增加;青冈林不同坡位的溶蚀速率差异不显著,而化香树林中坡显著高于上坡和下坡;不同森林类型坡位间的溶蚀速率未表现一致规律。森林类型间溶速率差异与土壤含水量有较好的对应而与土壤pCO_(2)相反,森林内坡位间及土壤垂直剖面的溶蚀速率差异与土壤pCO_(2)有更好对应性。亚热带不同岩溶森林类型间溶蚀速率差异显著,可用土壤含水量较好解释;不同坡位间差异没有一致规律,但可用土壤pCO_(2)较好解释。

关键词：标准溶蚀试片碳酸盐岩风化溶蚀速率森林类型碳汇

亚热带地区3种喀斯特林分凋落物组成对其持水性能的影响

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水土保持通报 2022年第6期42卷 137-145页

作者：唐伟侯满福刘雨婷贺露炎吴兴澳广西师范大学环境与资源学院广西桂林541004 珍稀濒危动植物生态与环境保护教育部重点实验室/广西漓江流域景观资源保育与可持续利用重点实验室广西师范大学广西桂林541004

[目的]揭示亚热带不同喀斯特林分凋落物组成对其持水性能的影响,为丰富森林生态水文研究和加深凋落物层与水文功能关系的认识提供科学依据。[方法]收集亚热带喀斯特区的青冈林、青冈+光蜡树林、化香树+密花树林3种代表性林分的凋落物层... 详细信息

[目的]揭示亚热带不同喀斯特林分凋落物组成对其持水性能的影响,为丰富森林生态水文研究和加深凋落物层与水文功能关系的认识提供科学依据。[方法]收集亚热带喀斯特区的青冈林、青冈+光蜡树林、化香树+密花树林3种代表性林分的凋落物层,将其分为半分解、未分解枝、未分解叶和其他未分解凋落物4种成分,选择每种林分前3种主要成分分别按0%,20%,40%,60%,80%和100%比例混合成21组质量相同、组成比例不同的处理(3种林分共63组处理)。采用浸水法研究其持水性能。[结果]①3种林分类型不同组成凋落物的持水率和吸水速率分别与浸水时间呈对数函数关系(R^(2)≥0.718)和幂函数关系(R^(2)≥0.998);在各浸水时段的持水率和吸水速率以化香树+密花树林纯未分解叶凋落物最大,青冈+光蜡树林纯未分解枝凋落物最小;②凋落物的持水率和吸水速率均与未分解叶比例呈极显著正相关关系(p<0.01),与未分解枝的比例呈极显著负相关关系(p<0.01),与半分解凋落物的比例无明显关系;③3种林分类型凋落物层的总蓄积量及其最大持水量无显著差异,但青冈林凋落物层的最大吸水速率显著高于化香树+密花树林。[结论]凋落物组成显著影响其持水性能。在凋落物生态水文效应研究中应综合考虑凋落物蓄积量及其组成的影响。

关键词：凋落物组成持水性能喀斯特森林不同林分亚热带

沸石掺量对膨润土类衬垫重金属吸附特性的影响

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浙江工业大学学报 2022年第5期50卷 513-516页

作者：刘继状许四法付亚君汪俊何露艳浙江建设职业技术学院浙江杭州311231 浙江工业大学土木工程学院浙江杭州310023 浙江唐盛房地产有限公司浙江杭州310000

膨润土衬垫作为垃圾填埋场防渗系统,遇重金属等有害物质时性能会下降。采用单元体试验分析Zn^(2+)对膨润土渗透特性的影响和沸石改善膨润土膨胀性能的效果。研究结果表明:沸石的掺入能改善膨润土的自由膨胀量,其中掺量为12.5%时效果最好... 详细信息

膨润土衬垫作为垃圾填埋场防渗系统,遇重金属等有害物质时性能会下降。采用单元体试验分析Zn^(2+)对膨润土渗透特性的影响和沸石改善膨润土膨胀性能的效果。研究结果表明:沸石的掺入能改善膨润土的自由膨胀量,其中掺量为12.5%时效果最好;随着沸石掺量增加,混合土渗透性能得到提升,渗透系数从10^(-7) cm/s降至10^(-8 )cm/s;同一沸石掺量下,Zn^(2+)浓度上升,渗透性能下降;沸石掺入后膨润土膨胀量增大且紧密地附着在石屑表层,吸附渗滤液中离子,因此混合土拥有较强的吸附能力,渗滤液中Zn^(2+)浓度下降。研究成果对垃圾填埋场衬垫系统设计和应用具有较好借鉴意义。

关键词：石屑-膨润土沸石渗透特性吸附性能

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表面活性剂残留与刺激性相关性研究

中国洗涤用品工业 2024年第7期 72-78页

作者：何璐燕孙毅时磊李金媛张淇琦杭州赛维质量技术咨询有限公司浙江杭州310000

通过靛蓝胭脂染色法、玉米醇溶蛋白过滤称重法和人体刺激性试验测试表面活性剂残留与刺激性,分析探讨不同种类的表面活性剂的残留与刺激性。结果表明刺激性小的表面活性剂,与角蛋白结合能力越小,表面活性剂的残留越小。

关键词：表面活性剂残留刺激性靛蓝胭脂染色法玉米醇溶蛋白

NON-ZONAL BAROCLINIC INSTABILITY IN The NORTH PACIFIC SUBTROPICAL COUNTERCURRENT

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Journal of Hydrodynamics 2004年第5期16卷 564-570页

作者： luyan LUODe-hai CollegeofPhysicalandEnvironmentalOceanography OceanUniversityofChinaQingdao266003China CollegeofPhysicalandEnvironmentalOceanography OceanUniversityofChinaQingdao266003China

Observations indicated that in the region of the Subtropical Countercurrent(STCC) over the Pacific (140°E-170°W, 19°N-28°N), the eddy kinetic energy over the western sideis much higher than that over the eastern side. The cause of such a behavior was theoreticallyinvestigated in this paper. The calculation of geostrophic current in this region indicates thatthere are relatively strong meridional geostrophic currents in this region even though the zonalcurrent is dominant in most seasons. Using a 2. 5-layer reduced-gravity model, ba-roclinicinstability of non-zonal current was discussed. It is found that at the western side of STCC thevertical shear of the meridional geostrophic current will be in favor of the ba-roclinicinstability, but at its eastern side it will suppress ba-roclinic instability, thus causing thegrowth of eddies over the western side much faster than that over the eastern side.

关键词： subtropical countercurrent (STCC) meridional geostrophic current baroclinicinstability

Rapid room-temperature synthesis of a porphyrinic MOF for encapsulating metal nanoparticles

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Nano Research 2021年第2期14卷 444-449页

作者： Huihui he luyan Li Yang Liu Meruyert Kassymova Dandan Li Liangliang Zhang Hai-Long Jiang Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Poly technical University(NPU)Xi’an 710072China Institutes of Physics Science and Information Technology Anhui UniversityHefei 230601China hefei National Laboratory for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

While metal nanoparticles(NPs)have shown great promising applications as heterogeneous catalysts,their agglomeration caused by thermodynamic instability is detrimental to the catalytic *** tackle this hurdle,we successfully prepared a functional and stable porphyrinic metal-organic framework(MOF),PCN-224-RT,as a host for encapsulating metal nanoparticles by direct stirring at room *** a result,Pt@PCN-224-RT composites with well-dispersed Pt NPs can be constructed by introducing pre-synthesized Pt NPs into the precursor solution of *** note,the rapid and simple stirring method in this work is more in line with the requirements of environmental friendly and industrialization compared with traditional solvothermal methods.

关键词： metal nanoparticles room tem perature and rapid synthesis PCN-224 Ostwald ripening

Comparison Study on the Microstructure of Nanocrystalline TiO_2 in Different Ti-Si Binary Oxides

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Journal of Materials Science & Technology 2007年第5期23卷 604-610页

作者： luyan WANG Yanping SUN Bingshe XU Chemical Engineering Department Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Interface and Engineering in Advanced Material Ministry of Education Taiyuan University of Technology Taiyuan 030024 China

Three different Ti-Si oxide structuares, silica supported titania, silica coated titania and intimately mixed silicatitania, containing 10%-40% SiO2, were made by sol-gel process. The variations of microstructure parameters of nanocrystalline （nc） TiO2-anatase in the three kirds of binary oxides, including in-plane spacing d, cell constants （ao, co）, cell volume V, cell axial ratio co/ao and crystal grain size, were comparatively investigated by high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD）. It is found that the microstructure parameters vary remarkably with increasing SiO2 content and annealing temperature. Different structured Ti-Si binary oxides lead to different variation tendencies of microstructure parameters. The more SiO2 the binary oxide contains, the more lattice defects of nc TiO2-anatase appear; diffusion or migration of Si cations could be an important influential factor in the variations of microstructure. The grain size of nc TiO2 in the three kinds of binary oxides not only depends on SiO2 content and annealing temperature but also on the degree of lattice microstrain and distortion of nc TiO2-anatase. Both grain size and phase transformation of nc TiO2-anatase are effectively inhibited with increasing SiO2 content.

关键词： Ti-Si binary oxide Sol-gel Microstructure parameter Comparison