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二硅化钼改性硅酸镱环境障涂层的高温抗氧化行为及机理

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热喷涂技术 2024年第1期16卷 100-108页

作者：梁锐辉钟鑫洪督赵芳霞牛亚然张振忠郑学斌中国科学院上海硅酸盐研究所上海200050 南京工业大学材料科学与工程学院南京211816

新一代高推重比航空发动机的发展对环境障涂层(EBCs)的服役寿命和温度提出了苛刻的要求。稀土硅酸盐作为EBCs材料应用于面层,在服役过程中易产生纵向裂纹,为腐蚀性介质的侵蚀提供通道,严重影响EBCs的寿命。二硅化钼(MoSi_(2))具有优异... 详细信息

新一代高推重比航空发动机的发展对环境障涂层(EBCs)的服役寿命和温度提出了苛刻的要求。稀土硅酸盐作为EBCs材料应用于面层,在服役过程中易产生纵向裂纹,为腐蚀性介质的侵蚀提供通道,严重影响EBCs的寿命。二硅化钼(MoSi_(2))具有优异的高温性能,有望改善稀土硅酸盐EBCs体系的高温性能。采用MoSi_(2)改性Yb_(2)SiO_(5)面层,通过真空等离子喷涂技术(VPS)分别制备了Yb_(2)SiO_(5)-XMoSi_(2)(X=0,5%和10%,体积分数)为面层,Yb_(2)Si_(2)O_(7)为中间层,Si为黏结层的三种环境障涂层体系。研究了涂层在1350℃长时间氧化前后显微结构演化过程。结果发现,掺杂MoSi_(2)涂层体系在高温氧化500 h后仍能保持结构完整且面层裂纹减少。原因在于,MoSi_(2)可消耗氧化剂,减缓涂层内部TGO的增长速率,反应产物Yb_(2)Si_(2)O_(7)与中间层成分一致,具有较好的化学相容性,有效改善了涂层体系的高温性能。

关键词：环境障涂层硅酸镱 MoSi_(2) 真空等离子喷涂高温抗氧化行为

Polyoxometalate-loaded Nanocellulose Sponge as a Novel Catalyst for the Regioselective hydroboration of Phenylacetylene

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Paper And Biomaterials 2019年第2期4卷 1-9页

作者： GuoQing Yang CongCong Zhang BiJia Wang ZhiPing Mao hong Xu Yi Zhong XueLing Feng XiaoFeng Sui Key Lab of Science and Technology of Eco-textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201620China Innovation Center for Textile Science and Technology of DhU Donghua UniversityShanghai201620China

In this work,an amino-modified cellulose nanofiber sponge was prepared and used as a support for polyoxometalate(POM)catalysts with a high loading *** transform infrared spectroscopy,thermogravimetric analysis,and energy-dispersive X-ray spectroscopy revealed that an Anderson-type POM,(Nh4)4[CuMo6O18(Oh)6]·5h2O was successfully immobilized on the sponge based on electrostatic *** analysis indicated that the POM-loaded sponge retained its porous structure and that the POM was homogeneously distributed on the sponge *** POM-loaded sponge exhibited excellent mechanical properties by recovering 79.9%of its original thickness following a 60%compression *** POM-loaded sponge was found to effectively catalyze the hydroboration of phenylacetylenes,yielding excellent conversion and regioselectivity of up to 96%and 99%,*** catalytic activity remained unchanged after five reuse *** findings represent a scalable strategy for immobilizing POMs on porous supports.

关键词： cellulose nanofiber polyoxometalates catalyst immobilization hydroboration heterogeneous catalyst

State-Feedback Path Tracking Control for Autonomous Vehicle with Sampled-Data Measurements

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State-Feedback Path Tracking Control for Autonomous Vehicle ...

100 cm^(2) Organic Photovoltaic Cells with 23%Efficiency under Indoor Illumination

第37届中国控制会议

作者： Guangyong An Changzhu Zhang hong Sun Department of Control Science and Engineering Tongji University

This paper investigates the problem of fuzzy h control for path tracking in autonomous vehicle with sampled-data measurements. Considering the variations of vehicle mass and velocity, a Takagi-Sugeno fuzzy model is proposed to describe the lateral vehicle dynamics. Under Lyapunov stability framework, sufficient conditions in terms of linear matrix inequalities have been derived for the stability of the path tracking system and the existence of admissible state feedback controllers, is also given for the closed-loop system to be asymptotically stable with a prescribed h disturbance attenuation level. Finally, the joint simulation(Matlab/Simulink and Carsim) results are provided to illustrate the effectiveness of the proposed method.

关键词： Path Tracking h∞ Control Sampled-data Measurements Autonomous Vehicle

来源： cnki会议评论

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Chinese Journal of Polymer Science 2022年第8期40卷 979-988,I0011页

作者： Yong Cui hui-Feng Yao Ye Xu Peng-Qing Bi Jian-Qi Zhang Tao Zhang Ling hong Zhi-hao Chen Zhi-Xiang Wei Xiao-Tao hao Jian-hui hou Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China CAS key laboratory of nanosystem and hierarchical fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China

The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad *** organic semiconductors intrinsically have less ordered intermolecular packing than inorganic materials,the relatively larger energetic disorder is one of the main results that limit the photovoltaic efficiency of the OPV cells at low carrier ***,we optimize the alkyl chains of non-fullerene acceptors to get suppressed energetic *** find the optimal acceptor DTz-R1 with the shortest alkyl chain has the strongest crystalline property and lowest energetic *** a result,over 26%efficiency is recorded for the 1 cm^(2) OPV cells under a light-emitting diode illumination of 500 *** also fabricate a 100 cm^(2) cell device and get a PCE of 23.0%,which is an outstanding value for large-area OPV *** results suggest that modulation of the energetic disorder is of great importance for further improving the efficiency of OPV cells,especially for indoor applications.

关键词： Organic photovoltaic cells Low light intensity Energetic disorder Energy loss Power conversion efficiency

心肌缺血再灌注损伤对L-型钙通道自抑制功能的影响

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中国循证心血管医学杂志 2024年第5期16卷 586-592页

作者：夏冰李心茹席宏陈剑楠杨玲玉李学文岳志杰山西医科大学第三医院心血管内科(山西白求恩医院山西医学科学院同济山西医院) 太原030032 山西医科大学第三医院麻醉科(山西白求恩医院山西医学科学院同济山西医院) 太原030032

目的探究心肌缺血再灌注(I/R)损伤对L-型钙通道(L-VDCC)自抑制功能的影响及机制。方法采用大鼠离体心脏灌流的方法构建I/R模型,BL-420N生物信号采集与分析系统监测I/R后心脏功能的变化;用CoCl2对急性分离的大鼠心肌细胞造成缺氧损伤,构... 详细信息

目的探究心肌缺血再灌注(I/R)损伤对L-型钙通道(L-VDCC)自抑制功能的影响及机制。方法采用大鼠离体心脏灌流的方法构建I/R模型,BL-420N生物信号采集与分析系统监测I/R后心脏功能的变化;用CoCl2对急性分离的大鼠心肌细胞造成缺氧损伤,构建细胞I/R模型,并用膜片钳、Co-IP及Western Blot检测L-VDCC的功能变化。结果与缺血0 min组和缺血30 min组相比,缺血60 min组复灌后心脏收缩力降低,心肌电活动减弱;缺氧6 h组和缺氧12 h组相比于缺氧0 h组细胞L-VDCC电流-电压(I-V)曲线峰值增大,稳态激活曲线左移,通道半激活电压(V1/2)增大,稳态激活曲线斜率因子Ka值降低,细胞死亡率增加;Cav1.2结合DCT及CaM的量减少,差异均有统计学意义(P<0.05);PKA、PKG等外源性调节蛋白表达水平无明显变化。结论心肌I/R损伤可引起心肌细胞L-VDCC自抑制功能减弱,Ca2+内流增加,引起细胞钙超载,促进心肌细胞死亡。

关键词：缺血再灌注损伤钙超载 L型钙通道自抑制功能心肌

NOVEL REACTIONS BETWEEN ChROMIUM CARBYNE COMPOUNDS AND DICOBALT OCTACRBONYL

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Chinese Chemical Letters 1995年第12期6卷 1069-1072页

作者： hong Sui SUN Yuan Qi YIN Xiao Zeng YOU and Yong Jiang LIU.(State key laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University,Nanjing 210093)(Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 7 Nanjing Univ Inst Coordinat Chem State Key Lab Coordinat Chem Nanjing 210093 Peoples R China Chinese Acad Sci Lanzhou Inst Chem Phys Lanzhou 730000 Peoples R China

The carbyne compounds(1), and (bipy=α,α'-dipyridyl) (2) react with dicobalt octacarbonyl in dichloromethane at room temperature, after chromatography on silica gel column, to give compounds [Co3(μ3-CC6h5)(CO)9] (3),[Co2Cr(μ3-CC6h5)Br(CO)8(Py)2] (4), and [Co2Cr(μ3-CC6h5)Br(CO)8(bipy)](5). Their structures were deduced from elemental analyses, IR, hNMR, 13C-{1h}NMR, and mass spectra.

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S vacant CuIn_(5)S_(8) confined in a few-layer MoSe_(2) with interlayerexpanded hollow heterostructures boost photocatalytic CO_(2) reduction

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Rare Metals 2022年第1期41卷 144-154页

作者： Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng Cai Xiao-Xiao Zou Jing-Wen Jiang Zhi-Yuan Mei Gen-Fu Zhao Xiao-Fei Yang hong Guo School of Materials and Energy Yunnan UniversityKunming 650091China Nanomaterials and Energy Lab Department of Mechanical and Materials EngineeringWestern UniversityLondonON N6A 5B9Canada

The conversion of CO_(2)into CO,Ch_(4)and other hydrocarbons through solar energy can alleviate the energy shortage *** design a novel photocatalyst with S defects CuIn_(5)S_(8)@MoSe_(2)hollow *** interlayerexpanded MoSe_(2)can increase the adsorption of *** unique hollow structure can improve the light utilization efficiency and the electron–holes ***_(5)S_(8)with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO_(2)***,S vacant CuIn_(5)S_(8)confined in a few-layers MoSe_(2)with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO_(2)*** 8-h light reaction,the outputs of CO and Ch_(4)for the 15.3 wt%CuIn_(5)S_(8)@MoSe_(2)sample containing S vacancies(Vs)are 30.4 and 14.7 lmol·g^(-1),*** mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.

关键词： Sulfur vacancy CuIn_(5)S_(8) MoSe_(2)heterojunction Photocatalytic CO_(2)reduction

Identifying the active sites in C-N codoped TiO_(2) electrode for electrocatalytic water oxidation to produce h_(2)O_(2)

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Journal of Central South University 2022年第9期29卷 3016-3029页

作者： XUE Sheng-guo TANG Lu TANG Tian ZhANG Feng LYU hua-gang LIU hong-yu JIANG Jun hUANG Yan-hong School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of heavy Metal Pollution Central South UniversityChangsha 410083China Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China Guangxi Research Institute of Environmental Protection Nanning 530000China

Unveiling the active site of an electrocatalyst is fundamental for the development of efficient electrode *** the two-electron water oxidation to produce h_(2)O_(2),competitive reactions,including four-and one-electron water oxidation and surface reconstruction derived from the high-oxidative environment co-existed,leading to great challenges to identify the real active sites on the *** this work,Ti/TiO_(2)-based electrodes calcined under air,nitrogen,or urea atmospheres were selected as electrocatalysts for two-electron water *** analyses were applied to evaluate the catalytic activity and *** morphological and current change on the electrode surface were determined by scanning electrochemical microscopy,while the chemical and valence evolutions with depth distributions were tested by XPS combined with cluster argon ion *** results demonstrated that Ti/TiO_(2) nanotube arrays served as the support,while the functional groups of carbonyl groups and pyrrolic nitrogen derived from the co-pyrolysis with urea were the active sites for the h_(2)O_(2) *** finding provided a new horizon to design efficient catalysts for h_(2)O_(2) production.

关键词： hydrogen peroxide in-situ characterization titanium dioxide electrode carbonyl pyrrolic nitrogen

Protective effect of indomethacin in renal ischemia-reperfusion injury in mice

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第8期15卷 735-742页

作者： Sheng-hong ZhU Li-jia ZhOU hong JIANG Rong-jun ChEN Chuan LIN Shi FENG Juan JIN Jiang-hua ChEN Jian-yong WU Kidney Disease Center the First Affiliated Hospital School of Medicine Zhejiang University Kidney Disease Center Shaoxing Second Hospital

Objective： To evaluate the renoprotection effects of non-steroidal anti-inflammatory drugs （NSAIDs） in renal ischemia-reperfusion injury （IRI） and the cyclooxygenase （COX）-1/2 blockade association by indomethacin （IMT） in the mice model. Methods： After the left renal pedicle of mice was clamped, IMT was administrated by intraperitoneal injection with four doses： 1, 3, 5, and 7 mg/kg. Blood and kidney samples were collected 24 h after IRI. The renal functions were assayed by the cytokines and serum creatinine （SCr） using enzyme-linked immunosorbent assay （ELISA） kits. Kidney samples were analyzed by hematoxylin and eosin （h＆E） and immunohistochemistry stainings. Results： The mice administered with 5 mg/kg IMT had a marked reduction in SCr and significantly less tubular damage The tumor necrosis factor a （TNF-α） activity in renal homogenates and interleukin 6 （IL-6） activity in serum had a marked reduction at doses of 5 and 7 mg/kg IMT. The administration of 3 and 5 mg/kg IMT had a marked reduction in the ratio of thromboxane B2 to 6-keto-prostaglandin F1α. COX-1 and COX-2 stainings were weaker in 5 mg/kg IMT groups than that in the other groups. Conclusions： There was a dose response in the IMT function of renal IRI in mice, and IMT had a protective effect in a certain dose range. The effect of IMT on mice IRI was related to COX-1/2 blockades.

关键词： Non-steroidal anti-inflammatory drug (NSAID) Indomethacin (IMT) Ischemia-reperfusion injury (IRI) Dosage Protective effect