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Journal of Advanced Ceramics 2023年第1期12卷 59-71页

作者： Shun LI zhijian peng Xiuli FU State Key Laboratory of Information Photonics and Optical Communications School of Integrated CircuitsBeijing University of Posts and TelecommunicationsBeijing 100876China School of Science China University of GeosciencesBeijing 100083China

Owing to the robust Li-ion storage properties induced by entropy stabilization effect,transition metal(TM)-based high-entropy oxides(HEOs)are promising electrode materials for highperformance Li-ion batteries(LIBs).In this study,a six-component Zn_(0.5)Co_(0.5)Mn_(0.5)Fe_(0.5)Al_(0.5)Mg_(0.5)O_(4) spinel-structured HEO(denoted as 6M-HEO,where M=Zn,Co,Mn,Fe,Al,and Mg)was synthesized using a facile coprecipitation *** used as an anode of the LIBs,its stable high-entropy nanostructures exhibit high specific capacity(290 mAh·g^(−1) at a current density of 2 A·g^(−1)),ultra-long cycling stability(maintained 81%of the initial capacity after 5000 cycles),and outstanding rate *** excellent performance can be attributed to two ***,its high-entropy structure can reduce the stress caused by intercalation and avoid volume expansion of the HEO *** a result,the cyclic stability was significantly ***,owing to the unique element selection in this study,four active elements(Zn,Co,Mn,and Fe)were incorporated in inactive MgO and Al2O3 matrice after the first discharge process,which would allow such high-entropy materials to withstand the rapid shuttle of Li ions.

关键词： coprecipitation method high-entropy oxide(HEO) Li-ion batteries(LIBs) anode

Effective passivation of black phosphorus transistor against ambient degradation by an ultra-thin tin oxide film

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Science Bulletin 2019年第9期64卷 570-574页

作者： Dianzhong Wu zhijian peng Chuanhong Jin Zhiyong Zhang School of Engineering and Technology China University of Geosciences Hunan Institute of Advanced Sensing and Information Technology Xiangtan University

Recently, two-dimensional (2D) layered semiconducting materials have been considered as promising channel materials to construct aggressively-scaled transistors owing to their excellent electrostatics and remained hig... 详细信息

关键词： BP SnO FET Effective passivation of black phosphorus transistor against ambient degradation by an ultra-thin tin oxide film

Effect of anionic group[SiO_(4)]^(4-)/[PO_(4)]^(3-) on the luminescence properties of Dy^(3+)-doped tungstate structural compounds

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Journal of Advanced Ceramics 2021年第4期10卷 843-851页

作者： Ning LIU Lefu MEI Jianxiong BIN Ze ZHANG zhijian peng School of Science China University of Geosciences(Beijing)Beijing 100083China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Sciences and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Novel scheelite structures of Li_(2)Ca(WO_(4))_(2),Li_(2)Ca_(2)(WO_(4))(SiO_(4)),and LiCa_(2)(WO_(4))(PO_(4))fluorescent materials were successfully prepared using a high-temperature solid-phase *** compounds were characterized by X-ray diffraction and energy dispersive *** tests revealed that the substitution of[WO_(4)]^(2-)by[SiO_(4)]^(4-) or [PO_(4)]^(3-) tetrahedron in tungstate had no significant influence on the crystal structure of the Li_(2)Ca(WO_(4))_(2).When Dy^(3+) ions were introduced as an activator at an optimum doping concentration of 0.08 mol%,all of the as-prepared phosphors generated yellow light emissions,and the emission peak was located close to 576 ***[WO_(4)]^(2-) with [SiO_(4)]^(4-) or [PO_(4)]^(3-) tetrahedron significantly increased the luminescence of the Li_(2)Ca(WO_(4))_(2) *** them,the LiCa_(2)(WO_(4))(PO_(4)):0.08Dy^(3+) phosphor had the best luminescence properties,decay life(r=0.049 ms),and thermal stability(87.8%).In addition,the as-prepared yellow Li_(2)Ca(WO_(4))_(2):0.08Dy^(3+),Li_(2)Ca_(2)(WO_(4))(SiO_(4)):0.08Dy^(3+),and LiCa_(2)(WO_(4))(PO_(4)):0.08Dy^(3+) phosphor can be used to fabricate white light emitting diode(LED)devices.

关键词： phosphors scheelite structure luminescence property anion substitution

Progress on rare-earth doped ZnO-based varistor materials

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Journal of Advanced Ceramics 2013年第3期2卷 201-212页

作者： Feng JIANG zhijian peng Yanxu ZANG Xiuli FU School of Engineering and Technology China University of GeosciencesBeijing 100083P.R.China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876P.R.China

Rare-earth(RE)doping can greatly enhance the voltage gradient of ZnO-based varistors,and their nonlinear coefficient,leakage current,energy absorption capability,through-current capability and residual voltage can also be improved to certain *** this review,the progress on RE-doped ZnO-based varistor materials in recent years was *** mechanism of RE doping on the electrical performance of ZnO varistors was *** issues in exploring new ZnO-based varistor materials by RE doping were indicated,and the development trends in this area were proposed.

关键词： ZnO varistor rare-earth(RE) doping

Significantly improved near-field communication antennas based on novel Ho^(3+)and Co^(2+)ions co-doped Ni-Zn ferrites

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Journal of Advanced Ceramics 2024年第3期13卷 293-309页

作者： Pao Yang Zhiqing Liu Hongbin Qi Xiuli Fu zhijian peng School of Science China University of GeosciencesBeijing 100083China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Kunshan GuoLi Electronic Technology Co. Ltd.Kunshan 215300China

In near-field communication(NFC)antennas,soft magnetic ferrites are usually applied as a substrate to reduce eddy current loss and increase magnetic field *** this purpose,the applied ferrites are required to have high permeability and saturation magnetization together with low magnetic loss and dielectric ***,for most soft magnetic ferrites,it is difficult to meet all the *** novel Ni-Zn ferrite ceramics co-doped by Ho^(3+)and Co^(2+)ions with chemical formula Ni_(0.5-x)Zn_(0.5)Ho_(0.02)Co_(x)Fe_(1.98)O_(4)(x=0-0.2)were designed and prepared to balance these needs on the basis of molten salt synthesis with metal nitrates as raw materials and potassium hydroxide(KOH)as the precipitation agent and molten salt *** the substitution of Ho^(3+),the saturation magnetization and initial permeability decrease,but with further doping of Co^(2+),the saturation magnetization gradually increases,while the initial permeability continues to *** x=0.1,the sample will have the lowest dielectric constant,magnetic and dielectric loss,as well as the highest Curie temperature(305℃).Moreover,the acquired Ni-Zn ferrites have been applied simulatively in NFC antennas,revealing that the device manufactured with the optimal Ni_(0.4)Zn_(0.5)Ho_(0.02)Co_(0.1)Fe_(1.98)O_(4)ferrite ceramics would have significantly improved performance at 13.56 MHz with low leakage and long transmit distance of magnetic ***,the Ni_(0.4)Zn_(0.5)Ho_(0.02)Co_(0.1)Fe_(1.98)O_(4)ferrite ceramics would be a good candidate for NFC antenna substrates.

关键词： electromagnetic properties co-doping microstrip antennas Ni-Zn ferrite

Process design and economic analysis of methacrylic acid extraction for three organic solvents

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Chinese Journal of Chemical Engineering 2019年第12期27卷 2909-2916页

作者： Jie Li zhijian peng Chunshan Li Ping Li Rafiqul Gani School of Engineering and Technology China University of GeosciencesBeijing 100083China Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and EngineeringKey Laboratory of Multiphase Complex SystemsZhongke Langfang Institute of Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China PSE for SPEED Skyttemosen 6DK-3450 AllerodDenmark

In this work,a techno-economic study for the solvent based extraction of methacrylic acid from an aqueous solution is *** involved phase equilibrium calculations in process design are verified by measured experimental ***,experiments are conducted with different solvent candidates to measure LLE(liquid–liquid equilibrium)data and to establish the effects of extraction temperature and dosage of ***,the binary interaction parameters for the UNIQUAC model to be used for equilibrium calculations are fine-tuned with measured ***,a process for the solvent based extraction of methacrylic acid recovery is designed and verified through simulation with the regressed UNIQUAC model *** optimal configuration of the process flowsheet is determined by minimizing the total annualized *** the three solvent candidates considered-cyclohexane,hexane and toluene-the highest efficiency and the lowest total annualized cost is found with toluene as the solvent.

关键词： Extraction Methacrylic acid Optimization Techno-economic analysis

Cutting Performance of WC-Co Alloys Modified by Nano-Additives

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Journal of Materials Science & Technology 2012年第3期28卷 205-213页

作者： You Wang Zhaoyi Pan Chengbiao Wang Xiaoguang Sun zhijian peng BaolinWang Laboratory of Nano Surface Engineering Department of Materials Science Harbin Institute of Technology Harbin 150001 China School ＇of Engineering and Technology China University of Geosciences Beijing 100083 China

In this paper,the microstructure of WC-Co alloys with and without nano-additives was characterized by scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The hardness and fracture toughness was tested by using a Vickers hardness tester and a universal testing *** cutting test was carried out at different feed velocities（250 r/min and 320 r/min）,and the contact pairs are cutting tools and 45# steel *** showed that the hardness and fracture toughness of WC-Co cemented carbides with nano-additives are higher than that of WC-Co cemented carbides without nano-additives,and they are increased 10.21% and 19.69%,*** flank worn width and crater width of cutting tools decrease greatly with the addition of *** the nano-modified specimen with WC grain size of 7 μm,both the flank worn width and crater width are the minimum after the cutting *** there are little built-up layers and some pile-up regions on the flank face leading to high cutting performance for the nano-modified cemented *** are some melted regions on the flank face of cutting tools without nano-additives,and the WC grains on the cross section of alloys without nano-additives show severe *** wear type of WC-Co is flank wear,and the wear mechanism is abrasive,adhesion and oxidation wear.

关键词： Cutting tools Hardness Fracture Surface analysis

A novel synthetic method of porous and nanoflower-like Al_(2)O_(3)/MoS_(2)catalyst for reduction of SO_(2)to elemental sulfur

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Nano Research 2023年第5期16卷 6076-6084页

作者： Yiqian Yang Jiayuan Yu Yu Chen Gang Wang Chunshan Li Erqiang Wang zhijian peng School of Engineering and Technology China University of GeosciencesBeijing 100083China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

MoS_(2)nanoflowers are favored for their potential in the production of elemental sulfur due to abundant surface area and good catalytic performance for reducing SO_(2).A novel synthetic strategy of porous Al_(2)O_(3)supported on the MoS_(2)with nanoflower structure was *** effects of preparation concentration,calcination atmosphere,Al_(2)O_(3)contents on the growth of catalysts with nanoflower structure were systematically studied via X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM),Fourier transform infrared(FTIR)spectroscopy,Brunauer–Emmett–Teller(BET).The surface area was increased to 295.502 m^(2)/g and the amount of Lewis acid on the surface of the Al_(2)O_(3)/MoS_(2)catalyst was increased by adjusting the ratio of Al/*** porous and nanoflower structures of Al_(2)O_(3)/MoS_(2)catalysts promoted the sulfur selectivity without inhibiting the catalytic performance of MoS_(2).The conversion of SO_(2)and the selectivity of sulfur were 100%and 92%after 100 h life evaluation.

关键词： porous catalyst nanoflower reduction of SO_(2) sulfur production hydrogen

Applications of polymer single nanochannels in biosensors

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Chinese Science Bulletin 2013年第13期58卷 1473-1482页

作者： HOU GuangLei peng zhijian TIAN Ye ZHANG HuaCheng JIANG Lei School of Engineering and Technology China University of Geosciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of ChemistryChinese Academy of Sciences

There are many elaborate masterpieces exist in natural world. Learning from nature, people developed serial intelligent biomimetic devices. Biomimetic smart nanochannels received widespread attention for mimicking biological processes in bodies. Excellent stability, tailorable surface characteristics and nano-size effects rend polymer single nanochannel an ideal candidate for constructing sensitive and reproducible biosensors. Nanochannels are responsive for special analytes while appropriate recognition elements are modified in channels wall. In this review, we summarized recent works in contructing biosensors that are using polymer single nanochannels for detecting various analytes.

关键词：生物传感器纳米通道聚合物应用纳米尺寸效应仿生智能生物过程表面特性

(TiZrHf)P2O7: An equimolar multicomponent or high entropy ceramic with good thermal stability and low thermal conductivity

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Journal of Materials Science & Technology 2019年第10期35卷 2227-2231页

作者： Zifan Zhao Huimin Xiang Fu-Zhi Dai zhijian peng Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China School of Engineering and Technology China University of GeosciencesBeijing 100083China

Zr P2O7 is a promising material for high temperature insulating applications. However, decomposition above 1400℃ is the bottleneck that limiting its application at high temperatures. To improve the thermal stability, a novel multicomponent equimolar solid solution(Ti Zr Hf)P2O7 was designed and successfully synthesized in this work inspired by high-entropy ceramic(HEC) concept. The as-synthesized(Ti Zr Hf)P2O7 exhibits good thermal stability, which is not decomposed after heating at 1550℃ for 3 h. It also shows lower thermal conductivity(0.78 W m^-1 K^-1) compared to the constituting metal pyrophosphates Ti P2O7, Zr P2O7 and Hf P2O7. The combination of high thermal stability and low thermal conductivity renders(Ti Zr Hf)P2O7 promising for high temperature thermal insulating applications.

关键词： Metal phosphates (TiZrHf)P2O7 High-entropy ceramics Thermal stability Thermal conductivity