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Multifunctional photon conversion materials for enhancing silicon solar cells

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Light(Science & Applications) 2024年第4期13卷 598-601页

作者： Yiyan Zhang guanying Chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology150001 HarbinChina

A type of multifunctional erbium(Er^(3+))and ytterbium(Yb^(3+))codoped NaY(WO4)2 phosphors,with simultaneous photon upconversion,photon quantum cutting,and luminescence ratiometric temperature sensing abilities,have b... 详细信息

关键词： photon luminescence quantum

Recent progress in lanthanide ions doped inorganic metal halide perovskites

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Journal of Rare Earths 2024年第2期42卷 237-250,I0001页

作者： Yiyan Zhang Tianyu Zhao guanying Chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Laboratory of Urban Water Resource and EnvironmentKey Laboratory of Micro-systems and Micro-structuresMinistry of EducationHarbin Institute of TechnologyHarbin150001China

Benefiting from their large molar extinction coefficient,high carrier mobility,narrow and tunable emissions,inorganic metal halide perovskites(IMHPs) demonstrate great potential in various optoelectrical devices including solar cells,light emitting diodes and photodetectors in the past few years.Metal ions doping,well-known as a modification method of semiconductors,has been extensively applied in IMHPs as well.Diverse metal ions have been doped in IMHPs including alkali metals,alkali earth metals,transition metals and lanthanide metals,which either improve their optical performances or induce intriguing brand-new properties.Among them,lanthanide metals feature plentiful energy levels and stable optical properties and are one of the most noteworthy species.Here we review recent progress in lanthanide ions doped IMHPs.We summarize Yb,Eu or Er ions singly doping in detail,which was the most investigated species in IMHPs.Other lanthanide ions are also reviewed synoptically.Furthermore,we introduce lanthanide ions multi-doped IMHPs and at last we put forward several potential development directions.As the interests in lanthanide ions doped IMHPs rise,researchers have made some achievements in the field.Still though,there are more unexplored issues.Although there are review articles focusing on metal ions doped IMHPs or lanthanide ions doped perovskites,this review aims to provide an overall introduction of lanthanide ions doped IMHPs.This review may help researchers learn about lanthanide ions doped IMHPs and is to inspire researchers to make further promotion in this field.

关键词： Halide perovskite Lanthanide Doping Rare earths

Complete degradation of high-loaded phenol using tungstate-based ionic liquids with long chain substituent at mild conditions

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Green Energy & Environment 2023年第2期8卷 452-458页

作者： Yingying yang Honglei Fan Tianbin Wu guanying yang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing100190China Education Research Center of Chaoyang District Beijing100021China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing100049China College of Chemistry and Chemical Engineering Yantai UniversityYantaiChina

Phenol in waste water threatens human health and is difficultly to be decomposed by nature.Efficient degradation of high-loaded phenol in water under mild condition is still a great challenge.Herein,ionic liquids with tungstate anion were designed and prepared.It was found that dodecyltrimethylammonium tungstate could catalyzed degradation of phenol into gases and water thoroughly at 323 k in 8 h.Tungstate anion revealed good catalytic oxidative activity and long carbon chain group connecting with cation of ionic liquids enriched phenol around catalysts,which induced the complete degradation of phenol at mild conditions.Increasing the amounts of hydrogen peroxide benefited to the total degradation of phenol.In addition,the ionic liquid could be reused for its excellent thermal stability.Our work provided a different strategy to treat waste water containing phenol efficiently.

关键词： Ionic liquid Oxidative degradation Phenol Tungstate Hydrogen peroxide

Increasing operational stability of journal bearing in hydraulic suspension micro-pump by herringbone grooved structure

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Science China(Technological Sciences) 2024年第3期67卷 853-862页

作者： HONG Tao XING guanying ZUO HuaiYu XUE Song LUO XiaoBing State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The operational stability of radial journal bearings is the bottleneck that limits the reliability of hydraulic suspension micropump. Due to self-excited vibrations, the whirl amplitude of the plain journal bearing(PJB) is large at high rotational speeds,which will accelerate wear failure. It has been proven that employing herringbone grooved journal bearing(HGJB) is an effective method to reduce the whirl amplitude and improve operational stability. However, enhancing the stability of journal bearings in micro-pumps by herringbone grooved structures has rarely been studied, and its effect needs to be verified. We validated the mechanism of the stability improvement with the CFD method and compared the dynamic characteristics of HGJB and PJB by rotor dynamics evaluation and experiment. The experimental results show that under the same conditions the whirl amplitude of the HGJB decreases by 29.61% in the x direction and by 24.09% in the y direction compared with that of the PJB. This study reveals the effect of the herringbone grooved structure on the operational stability of bearings and may provide guidance for the reliability improvement of hydraulic suspension micro-pump.

关键词： journal bearing herringbone groove hydrodynamic effect micro-pump

Electrochemical reduction of CO_2 to CO using graphene oxide/carbon nanotube electrode in ionic liquid/acetonitrile system

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中国科学：化学英文版 2016年第5期59卷 551-556页

作者： Qinggong Zhu Jun Ma Xinchen Kang Xiaofu Sun Jiayin Hu guanying yang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences

Electrochemical reduction of CO_2 to CO is an interesting topic. In this work, we prepared metal-free electrodes by depositing graphene oxide(GO), multi-walled carbon nanotube(MWCNT), and GO/MWCNT composites on carbon paper(CP) using electrophoretic deposition(EPD) method. The electrodes were characterized by different methods, such as X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The electrochemical reduction of CO_2 to CO was conducted on the electrodes in 1-butyl-3-methylimidazolium tetrafluoroborate([Bmim]BF4)/acetonitrile(Me CN) electrolyte, and the composition of the electrolyte influenced the reaction significantly. It was demonstrated that GO/MWCNT-CP electrode was very effective for the reaction in IL(90 wt%)/Me CN binary mixture, the Faradaic efficiency of CO and current density were even higher than those on Au and Ag electrodes in the same electrolyte.

关键词：碳纳米管电极电化学还原二氧化碳氧化石墨乙腈离子液体 X射线光电子能谱多壁碳纳米管

Preparation of PMMA Foam by Supercritical CO_(2) with Ethanol

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Chinese Chemical Letters 2001年第2期12卷 183-184页

作者： Zhi Min LIU guanying yang Dan LI Bu Xing HAN Center for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100080

Supercritical CO2 with ethanol as blowing agent foamed poly（methylmethacrylate）（PMMA） fiber at 308.15K and in the pressure range from 12-15MPa. The foam structure was detected using scanning electron microscope. ... 详细信息

关键词： PMMA Foam CO2.

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福建藤牌的功能演变及文化意义

雕塑 2024年第2期 86-87页

作者：杨冠英福州大学厦门工艺美术学院

明清时期,藤牌是出自福建的冷兵器之一,伴随着戚继光抗倭和郑成功收复台湾地区而闻名于世。随着时代的变迁,藤牌的功能逐步演变为具有福建特色的文化艺术佳品。本论文旨在通过对福建藤牌的溯源研究,探索其在内地和台湾地区的传播历史和... 详细信息

明清时期,藤牌是出自福建的冷兵器之一,伴随着戚继光抗倭和郑成功收复台湾地区而闻名于世。随着时代的变迁,藤牌的功能逐步演变为具有福建特色的文化艺术佳品。本论文旨在通过对福建藤牌的溯源研究,探索其在内地和台湾地区的传播历史和演变过程,揭示福建藤牌的文化意义和现实价值,旨在进一步挖掘藤牌文化艺术的丰富内涵,促进福建藤牌传统文化的传承和转化。

关键词：福建藤牌功能演变文化意义现实价值

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Synthesis of cyclic carbonates and dimethyl carbonate using CO_(2) as a building block catalyzed by MOF-5/KI and MOF-5/KI/K_(2)CO_(3)

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中国化学前沿:英文版 2011年第1期6卷 21-30页

作者： Jinliang SONG Binbin ZHANG Tao JIANG guanying yang Buxing HAN Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190China

The synthesis of cyclic carbonates or dimethyl carbonate(DMC)using CO_(2) as a building block is a very interesting topic.In this work,we found that the metalorganic framework-5(MOF-5)/KI was an active and a selective catalytic system for the synthesis of cyclic carbonates from CO_(2) and epoxides,and MOF-5/KI/K_(2)CO_(3) was efficient for the preparation of DMC from CO_(2),propylene,and methanol by a sequential route.The impacts of temperature,pressure,and reaction time length on the reactions were investigated,and the mechanism of the reactions is proposed on the basis of the experimental results.

关键词： carbon dioxide cyclic carbonates dimethyl carbonate(DMC) metal-organic framework-5(MOF-5) sequential route propylene oxide

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基于高密度聚乙烯材料的3D打印数值仿真

塑料 2024年第3期53卷 28-33,55页

作者：蒲海洋隋江华沈烈杨冠英刘润强大连海洋大学航海与船舶工程学院辽宁大连116000 大连蓝旗船舶科技有限公司辽宁大连116000

结合传统熔融沉积(FDM)3D打印机尺寸限制模型尺寸的现象,将高密度聚乙烯材料(HDPE)应用于3D打印领域。首先采用正交试验方法并结合ANSYS PolyFlow软件,研究料筒内流道结构参数及不同螺杆挤出量对流道内流体速度与温度的影响程度。结果表... 详细信息

结合传统熔融沉积(FDM)3D打印机尺寸限制模型尺寸的现象,将高密度聚乙烯材料(HDPE)应用于3D打印领域。首先采用正交试验方法并结合ANSYS PolyFlow软件,研究料筒内流道结构参数及不同螺杆挤出量对流道内流体速度与温度的影响程度。结果表明,喷嘴内径对流体速度及流体温度的影响最大,对收敛角的影响最小。当挤出量为2 cm^(3)/s、喷嘴直径为4 mm、收敛角为150°时,工艺方案最佳。然后,进行挤出及打印试验,完成290 mm×175 mm×65 mm矩形模型的打印,证明HDPE在3D打印领域应用的可行性。最后,打印试件并进行拉伸试验,结果表明,与板材挤压制造的拉伸试件相比,3D打印制作的拉伸试件性能较差。

关键词： 3D打印 HDPE ANSYS 正交试验拉伸试验