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engineering 2023年第2期 152-161页

作者：姚恺清宋崇虎方红王峰陈炼蒋少华查国君侯豪情 Department of chemistry and chemical engineering Jiangxi Normal University Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Materials Science and Engineering Nanjing Forestry University school of New Energy Science and engineering Xinyu University

在现代新材料的快速发展中，用节能、省时、低成本和简便的新型方法制备具有优良机械性能和热学性能的轻质、低密度和高孔隙率气凝胶十分必要。在本工作中，我们使用短切电纺聚酰亚胺(PI)纤维作为支撑骨架，通过开发出一种无需特殊干燥...

在现代新材料的快速发展中，用节能、省时、低成本和简便的新型方法制备具有优良机械性能和热学性能的轻质、低密度和高孔隙率气凝胶十分必要。在本工作中，我们使用短切电纺聚酰亚胺(PI)纤维作为支撑骨架，通过开发出一种无需特殊干燥方法的真空干燥(VD)与冷冻萃取相结合的方法，制备出高性能PI纤维气凝胶(PIFA)。所得PIFAs具有低密度(≤52.8 mg·cm–3)和高孔隙率(>96%)。该PIFA在至少20 000次的循环压缩过程中展现出高度的耐疲劳性及低能量损失系数。密度为39.1 mg·cm-3的PIFA具有40.4 mW·m–1·K–1的热导率。通过进一步使用聚硅氮烷对PIFA复合改性后，其具备更强的耐火性和氮气氛围中的高残留率(>70%)。这些优异的性能使PIFAs及其复合材料成为可应用于建筑工业、航空和航天工业轻质材料、隔热和防火层以及高温反应催化剂载体的可选材料。此外，本工作中提出的冷冻萃取/VD法因其节能、省时和节约成本而可拓展于制备其他材料。

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Synthesis, Crystal Structure and Antineoplasmic Activity of 3,6,8- Tribromo-5-hydroxy-2,7-dimethoxy-2-phenyl-2,3-dihydrochromen-4-one

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Synthesis, Crystal Structure and Antitumor Activity of Tectochrysin-6-sulfonate

结构化学 2018年第7期 1071-1077页

作者： LIWu-Wu ZHENGMin-Yan LIXiao-Bo ZHANGZun-Ting college of chemistry & chemical engineering，xianyang normal University Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical chemistry，National engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China and school of chemistry and chemical engineering，Shaanxi normal University

The reaction of 5-hydroxyl-7-methoxyflavone（tectochrysin） with bromine obtained 3,6,8-tribromo-5-hydroxy-2,7-dimethoxy-2,3-dihydrochromen-4-one（1）, which was characterized by FT-IR, 1 H-NMR, 13C-NMR, elemental analysis and X-ray single-crystal diffraction. Complex 1 belongs to the monoclinic system, space group pbca with a = 9.4673（8）, b = 17.9938（15）, c = 21.2004（17） ?, V = 3611.5（5） ?3, Z = 8, μ = 0.6726 mm-1, Dc = 1.795 g/cm3, F（000） = 2080, the final R = 0.0358 and wR = 0.0644 with I > 2σ（I）. The results show that the addition reaction occurs at the carbon-carbon double bond（C2 and C3） of tectochrysin and 1 belongs to dihydroflavone. The reaction mechanism was discussed and the structure revealed that the crystal structure of 1 is stabilized by intramolecular hydrogen bonds and C–Br···π interactions. The antitumor ability of 1 was evaluated against human leukemia cells（K562）, human breast cancer cells（MCF-7） and human lung cancer cells（A549）. 1 exhibited potent antitumor activities against human leukemia cells（K562） with the IC50 values of 18.9 μmol/L.

关键词： 3,6,8-tribromo-5-hydroxy-2 7-dimethoxy-2 3-dihydrochromen-4-one spectroscopic property crystal structure reaction mechanisms antitumor activity

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CsPb(I_(x)Br_(1-x))_(3) solar cells

结构化学 2018年第1期 97-104页

作者： LI Wu-Wu ZHANG Zun-Ting college of chemistry & chemical engineering Xianyang Normal University Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical chemistry National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China and School of Chemistry and Chemical EngineeringShaanxi Normal University

In order to enhance water-solubility and biological utilization rate of tectochrysin,sodium 5-hydroxyl-7-methoxyflavone-6-sulfonate(1) was synthesized and its structure was identified on the basis of 1 H NMR,FT-IR and elemental analysis.5-Hydroxyl-7-methoxyflavone-6-sulfonate was assembled with Ni(II) or Mn(II),hexaquanickel(II) bis(5-hydroxyl-7-methoxyflavone-6-sulfonate) tetrahydrate(2) and hexaquamanganese(II) bis(5-hydroxyl-7-methoxyflavone-6-sulfonate) tetrahydrate(3) were obtained and characterized by IR *** crystal structures of 2 and 3 were determined by X-ray single-crystal diffraction *** results showed that 2 and 3 are isomorphous crystals and crystallize in monoclinic crystal system,space group C2/*** 2 and 3,the supramolecular structures are organized into hydrophilic and hydrophobic *** regions are generated by O–H???O hydrogen bonds among sulfonate groups,latticed water molecules and coordinated water *** π-π stacking interactions assemble the flavone skeletons into columns and these columns form hydrophobic *** sulfonate groups play an important role as a bridge of the hydrophilic and hydrophobic regions as well as the inorganic and organic ***-dimensional networks of 2 and 3 are furnished by extensive array of hydrogen bonds,π-π stacking interactions and electrostatic *** anti-proliferative activities of 1~3 in vitro against human leukemia cells K562 and human lung cancer cells A549 were evaluated by the standard MTT *** pharmacological activity results showed that the introduction of sulfonic acid groups enhanced the antitumor activity of tectochrysin.

关键词： 5-hydroxyl-7-methoxyflavone-6-sulfonate spectroscopic property crystal structure antitumor activity

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Science Bulletin 2019年第20期64卷 1532-1539页

作者： Xue Jia Chuantian Zuo Shuxia Tao Kuan Sun Yixin Zhao Shangfeng Yang Ming Cheng Mingkui Wang Yongbo Yuan Junliang Yang Feng Gao Guichuan Xing Zhanhua Wei Lijun Zhang Hin-Lap Yip Mingzhen Liu Qing Shen Longwei Yin Liyuan Han Shengzhong Liu Lianzhou Wang Jingshan Luo Hairen Tan Zhiwen Jin Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing100190China University of Chinese Academy of Sciences Beijing100049China CSIRO Manufacturing Bag10Clayton SouthVictoria3169Australia Center for Computational Energy Research Department of Applied PhysicsEindhoven University of Technology5600MB EindhovenThe Netherlands MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityChongqing400044China school of Environmental Science and engineering Shanghai Jiao Tong UniversityShanghai200240China Department of Materials Science and engineering University of Science and Technology of ChinaHefei230026China Institute for Energy Research Jiangsu UniversityZhenjiang212013China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China school of Physics and Electronics Central South UniversityChangsha410083China Department of Physics Chemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden Institute of Applied Physics and Materials engineering University of MacaoMacao999078China college of Materials Science&engineering Huaqiao UniversityXiamen361021China college of Materials Science and engineering Jilin UniversityChangchun130012China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou510640China Center for Applied chemistry School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu611731China Faculty of Informatics and engineering The University of Electro-CommunicationsTokyo182-8585Japan school of Materials Science and engineering Shandong UniversityJinan250061China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Normal UniversityXi’an710119China

Owing to its nice performance, low cost, and simple solution-processing, organic-inorganic hybrid perovskite solar cell(PSC) becomes a promising candidate for next-generation high-efficiency solar *** power conversion efficiency(PCE) has boosted from 3.8% to 25.2% over the past ten years. Despite the rapid progress in PCE, the device stability is a key issue that impedes the commercialization of PSCs. Recently, all-inorganic cesium lead halide perovskites have attracted much attention due to their better stability compared with their organic-inorganic counterpart. In this progress report, we summarize the properties of CsPb(IxBr1-x)3 and their applications in solar cells. The current challenges and corresponding solutions are discussed. Finally, we share our perspectives on CsPb(IxBr1-x)3 solar cells and outline possible directions to further improve the device performance.

关键词： Perovskite solar cells Cesium lead halide perovskites Power conversion efficiency Stability

High-performance polyamide nanofiltration membrane with arch-bridge structure on a highly hydrated cellulose nanofiber support

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Science China Materials 2020年第12期63卷 2570-2581页

作者： Xiangxiu Teng Wangxi Fang Yuanzhe Liang Shihong Lin Hongzhen Lin Shasha Liu Zhenyi Wang Yuzhang Zhu Jian Jin i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China school of Physical Science and Technology Shanghai Tech UniversityShanghai 200031China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Department of Civil and Environmental engineering Vanderbilt UniversityNashvilleTN 37235-1831United States college of chemistry and chemical engineering Qilu Normal UniversityJinan 250200China

Nanofiltration(NF)membranes with outstanding performance are highly demanded for more efficient desalination and wastewater ***,improving water permeance while maintaining high solute rejection by using the current membrane fabrication techniques remains a ***,polyamide(PA)NF membrane with archbridge structure is successfully prepared via interfacial polymerization(IP)on a composite support membrane of saltreinforced hydrophilic bacterial cellulose nanofibers(BCNs)nanofilm/polytetrafluoroethylene(BCNs/PTFE).The strong hydration of BCNs promotes Marangoni convection along water/organic solvent interface during the IP process,which creates extra area for interfacial reaction and produces a thin PA active layer with arch-bridge *** arch-bridge structures endow the resulting PA active layer with substantial larger active area for water ***,the PA NF membrane exhibits exceptional desalination performance with a permeance up to 42.5 L m^-2h^-1bar^-1 and a rejection of Na2SO4as high as 99.1%,yielding an overall desalination performance better than almost all of the state-of-the-art NF membranes reported so far in terms of perm-selectivity.

关键词： nanofiltration membrane crumpled structure cellulose nanofibers interfacial polymerization desalination

Low-Temperature Aging Provides 22% E cient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells

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Nano-Micro Letters 2020年第7期12卷 29-42页

作者： Xin Wang Luyao Wang Tong Shan Shibing Leng Hongliang Zhong Qinye Bao Zheng-Hong Lu Lin-Long Deng Chun-Chao Chen school of Material Science and engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China school of chemistry and chemical engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Key Laboratory of Solar Materials and Devices Department of Electronic ScienceSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200240People’s Republic of China Department of Materials Science and engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005People’s Republic of China

Previous reports of formamidinium/methylamine(FAMA)-mixed halide perovskite solar cells have focused mainly on controlling the morphology of the perovskite film and its interface—for example,through the inclusion of bromine and surface *** this paper,we describe a new processing pathway for the growth of a high-quality bromine-free FAMAPbI3 halide perovskites via the control of intermediate *** low-temperature aging growth(LTAG)of a freshly deposited perovskite film,α-phase perovskites can be seeded in the intermediate phase and,at the same time,prevent beta-phase perovskite to *** postannealing,large grain-size perovskites with significantly reduced PbI2 presence on the surface can be obtained,thereby eliminating the need of additional surface passivation *** pristine LTAG-treated solar cells could provide PCEs of greater than 22%without elaborate use of bromine or an additional passivation *** importantly,when using this LTAG process,the growth of the pure alpha-phase FAMAPbI3 was highly reproducible.

关键词： Aging growth Bromine-free Passivation layer Lead iodide Perovskite solar cells

Super high maximum on-state currents in 2D transistors

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Journal of Semiconductors 2022年第12期43卷 9-11页

作者： Xiaotian Sun Qiuhui Li Ruge Quhe Yangyang Wang Jing Lu college of chemistry and chemical engineering and Henan Key Laboratory of Function-Oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934China State Key Laboratory of Information Photonics and Optical Communications and school of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory for Mesoscopic Physics and school of Physics Peking UniversityBeijing 100871China Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094China Collaborative Innovation Center of Quantum Matter Beijing 100871China Beijing Key Laboratory for Magnetoelectric Materials and Devices(BKL-MEMD) Peking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Key Laboratory for the Physics and chemistry of Nanodevices Peking UniversityBeijing 100871China

Two-dimensional(2D)materials have been recognized as a type of potential channel material to replace silicon in future field-effect transistors(FETs)by the International Technology Roadmap for Semiconductors(ITRS)and its succesor the International Roadmap for Devices and Systems(IRDS)[1−4].Substantial first principle quantum transport simulations have predicted that many 2D transistors,including those with MoS2,WSe2,phosphorene,and Bi2O2Se channels,own excellent device performance and are able to extend Moore’s law down to the sub-10 nm scale[4].

关键词： transistors replace state

Glassy magnetic ground state in layered compound MnSb_(2)Te_(4)

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Science China Materials 2022年第2期65卷 477-485页

作者： Hao Li Yaoxin Li Yukun Lian Weiwei Xie Ling Chen Jinsong Zhang Yang Wu Shoushan Fan school of Materials Science and engineering Tsinghua UniversityBeijing 100084China Department of Mechanical engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Department of chemistry and chemical Biology Rutgers UniversityPiscataway 08854USA Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China

As a sister compound of MnBi_(2)Te_(4),the highquality MnSb_(2)Te_(4) single crystals are grown via solid-state reaction where prolonged annealing and narrow temperature window play critical roles on account of its thermal ***-crystal X-ray diffraction(SCXRD)analysis on MnSb_(2)Te_(4) illustrates a crystal model that is isostructural to MnBi_(2)Te_(4),consisting of Te-Sb-Te-Mn-Te-Sb-Te septuple layers(SLs)stacking in an ABC ***,MnSb_(2)Te_(4) reveals a more pronounced cation intermixing in comparison with MnBi_(2)Te_(4),comprising 28.9(7)%Sb antisite defects on the Mn(3a)site and 19.3(6)%Mn antisite defects on the Sb(6c)site,which may give rise to novel magnetic properties in emerging layered MnBi_(2)Te_(4)-family *** the antiferromagnetic(AFM)nature in MnBi_(2)Te_(4),MnSb_(2)Te_(4) exhibits a glassy magnetic ground state below 24 K and can be easily tuned to a ferromagnetic state under a weak applied magnetic *** magnetic hysteresis,anisotropy,and relaxation process are investigated in detail via static and dynamic magnetization ***,anomalous Hall effect as a p-type conductor is demonstrated with transport *** work grants MnSb_(2)Te_(4) a possible access to the future exploration of exotic quantum physics by removing the odd/even layer number restraint in realizing quantum transport phenomena in intrinsic AFM MnBi_(2)Te_(4)-family materials,as a result of the crossover between its magnetism and potential topology arising from the Sb-Te layer.

关键词： MnSb2Te4 crystal growth glassy magnetic ground state anomalous Hall effect

Synthesis and Electrochemical Properties of Mg-doped LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2 Cathode Materials for Li-ion Battery

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 212-216页

作者：傅春燕 Shaoyang Medical college Level Speciaity school Department of Pharmacy

The layered LiNi0.6Co0.2-xMn0.2MgxO2 （x=0.00,0.03,0.05,0.07） cathode materials were prepared by a co-precipitation *** properties of the Mg-doped LiNi0.6Co0.2Mn0.2O2 were investigated by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,and electrochemical *** studies showed that the Mg-doped LiNi0.6Co0.2Mn0.2O2 had the same layered structure as the undoped *** SEM images exhibited that the particle size of Mg-doped LiNi0.6Co0.2Mn0.2O2 was finer than that of the undoped LiNi0.6Co0.2 Mn0.2O2 and that the smallest particle size is only about 1μ*** Mg-doped LiNi0.6Co0.2Mn0.2O2 samples were investigated on the Li extraction/insertion performances through charge/discharge,cyclic voltammogram （CV）,and electrochemical impedance spectra（EIS）.The optimal doping content of Mg was that x= 0.03 in the LiNi0.6Co0.2-xMn0.2MgxO2 samples to achieve high discharge capacity and good cyclic *** electrode reaction reversibility and electronic conductivity was enhanced,and the charge transfer resistance was decreased through *** improved electrochemical performances of the Mg-doped LiNi0.6Co0.2Mn0.2O2 cathode materials are attributed to the addition of Mg 2＋ ion by stabilizing the layer structure.

关键词： lithium ion batteries LiNi0.6Co0.2Mn0.2O2 Mg-doping cyclic voltammogram (CV)