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A-site assisted perovskite crystallization via ion-exchange MOFs for high efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2024年第6期93卷 436-442,I0011页

作者： Xingrui zhang Jian zhang Wei Wang boyuan Hu Yayu Dong Debin Xia Kaifeng Lin Yulin Yang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

Here,a novel strategy is proposed targeting the volatility of A-site cations and the disordered arrangement of perovskite grains through employing Cs~+contained metal-organic frameworks In-aip(Cs)obtained by ion-exchange and crystalline transform.Interatomic forces between Cs-O atoms split the pore channels of the pristine In-aip,endowing In-aip(Cs)with multidimensional charge transport channels,In addition,the partially freed Cs~+in the interlayer compensates for the vacancy of A-site cations during the perovskite preparation process.The In-aip(Cs)modified perovskite films have a flat morphology,large grains and excellent optoelectronic properties.Benefiting from the high-quality perovskite films and faster charge extraction,the In-aip(Cs)-modified PSCs achieved a champion PCE of 23.03%,superior to the In-aip-modified(22.29%)and control device(21.13%),More importantly,the unencapsulated PSCs modified with In-aip(Cs)exhibited outstanding humidity and thermal stability.Over a period of almost 1000 h,the unencapsulated In-aip(Cs)-modified device retained 85%of its initial PCE after storing in a glove box at 85℃,and retained 87%of the primary PCE upon storage in ambient condition at 25℃under a humidity of 40%.

关键词： Metal-organic frameworks PSCs Stability Defect passivation

Multifunctional MOF@COF Nanoparticles Mediated Perovskite Films Management Toward Sustainable Perovskite Solar Cells

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Nano-Micro Letters 2024年第9期16卷 195-208页

作者： Yayu Dong Jian zhang Hongyu zhang Wei Wang boyuan Hu Debin Xia Kaifeng Lin Lin Geng Yulin Yang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013JiangxiPeople’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangPeople’s Republic of China

Although covalent organic frameworks(COFs)with highπ-conjugation have recently exhibited great prospects in perovskite solar cells(PSCs),their further application in PSCs is still hindered by face-to-face stacking and aggregation issues.Herein,metal-organic framework(MOF-808)is selected as an ideal platform for the in situ homogeneous growth of a COF to construct a core-shell MOF@COF nanoparticle,which could effectively inhibit COF stacking and aggregation.The synergistic intrinsic mechanisms induced by the MOF@COF nanoparticles for reinforcing intrinsic stability and mitigating lead leakage in PSCs have been explored.The complementary utilization ofπ-conjugated skeletons and nanopores could optimize the crystallization of large-grained perovskite films and eliminate defects.The resulting PSCs achieve an impressive power conversion efficiency of 23.61%with superior open circuit voltage(1.20 V)and maintained approximately 90%of the original power conversion efficiency after 2000 h(30-50%RH and 25-30℃).Benefiting from the synergistic effects of the in situ chemical fixation and adsorption abilities of the MOF@COF nanoparticles,the amount of lead leakage from unpackaged PSCs soaked in water(<5 ppm)satisfies the laboratory assessment required for the Resource Conservation and Recovery Act Regulation.

关键词： Perovskite solar cells Covalent organic frameworks Metal-organic frameworks Lead leakage Stability

Insights into the floatability between spodumene and albite from crystal chemistry standpoint

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International Journal of Mining Science and Technology 2022年第6期32卷 1329-1339页

作者： Hepeng Zhou Fanxin Xie Yongbing zhang boyuan zhang Siqi Yang Xianping Luo Engineering Research Center for High-efficiency Development and Application Technology of Tungsten Resources(Jiangxi University of Science and Technology) Ministry of EducationGanzhou 341000China Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control Jiangxi University of Science and TechnologyGanzhou 341000China

Spodumene is a silicate mineral rich in lithium.However,the gangue mineral,albite has similar crystal chemical structure and composition to spodumene.In this work,the density functional theory(DFT)calculation was taken to research the floatability from the perspective of crystal chemistry.And contact angle test and reagent adsorption test were used to support the simulation results.In addition,the weighted total density of broken bonds is proposed for the first time to judge the generation probability of cleavage surface.The DFT calculation results display that the Na and Al sites on the albite surface are the adsorption sites of water molecules.While the water molecules only bond with Al atom on the surface of spodumene and each Al site can adsorb only one water molecule.Thus,the wetting effect of water molecules on the albite surface is stronger than that of spodumene.This is consistent with the result of contact angle.In sodium oleate system,the oleic acid anion is adsorbed on the spodumene surface in form of a multicomponent ring while the albite is a single ring.Theoretically,oleic acid anion can be strongly adsorbed on the surface of spodumene and albite under vacuum.The adsorption strength of spodumene is higher than that of albite.However,on hydrated surface,the adsorption strength of oleic acid anion on mineral surface is greatly reduced due to the interaction between water molecules and metal site on mineral surface.Thus,spodumene and albite are hard to float without external activated ions in sodium oleate system.

关键词： Spodumene Albite Floatability Crystal chemistry DFT calculation

Pore structure characterization and seepage analysis of ionic rare earth orebodies based on computed tomography images

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International Journal of Mining Science and Technology 2022年第2期32卷 411-421页

作者： Xianping Luo Yongbing zhang Hepeng Zhou Kunzhong He boyuan zhang Dongming zhang Weijing Xiao National Innovation Center for Rare Earth Functional Material Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Ionic Rare Earth Resources Development and Application Ministry of EducationJiangxi University of Science and TechnologyGanzhou 341000China Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution Control Jiangxi University of Science and TechnologyGanzhou 341000China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China

Pore network structure of ore body is a diffusion channel of leaching agent solution that exerts a significant influence on seepage.The ore body structure,pore distribution,pore and throat size,and pore network characteristics of topsoil,weathered,and semiweathered layers of ionic rare earth ore in southern Jiangxi Province were explored in this study.The effect of leaching operation on the pore structure was investigated,and main factors affecting the seepage were analyzed.Results showed that the semiweathered layer presents a dense structure and a small number of unconnected pores.Pores of topsoil and weathered layers are mainly long and narrow column openings with some planar fractures.Even pore distribution and large size span were observed.Compared with the weathered layer,the topsoil layer demonstrates larger voids,smaller average pore volume and equivalent radius,and fewer coordination throats;however,the average equivalent radius of the throat in the topsoil layer is larger and largescale channels exist through ore body vertically.Hence,permeability of the topsoil layer is significantly higher than that of the weathered layer.Colloidal clay minerals migrate easily and the occurrence of silting in the small porosity blocks the throat and significantly decreases the permeability of the ore body in the leaching process.The equivalent radius of the throat is the key to the seepage.Reducing the migration of fine particles is an effective measure to protect the throat and shorten the leaching period.

关键词： Ionic rare earth ore CT scanning 3D visualization Pore characteristics Permeability

Enhancing the leaching effect of an ion-absorbed rare earth ore by ameliorating the seepage effect with sodium dodecyl sulfate surfactant

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International Journal of Mining Science and Technology 2021年第6期31卷 995-1002页

作者： Yongbing zhang boyuan zhang Siqi Yang Zhigang Zhong Hepeng Zhou Xianping Luo Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution Control Ganzhou 341000China Key Laboratory of Ionic Rare Earth Resources Development and Application Ministry of EducationGanzhou 341000China Faculty of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Ameliorating the problem of low leaching efficiency,long leaching period,and high agent consumption should be studied to efficiently exploit ion-absorbed rare earth ore resources.In this study,the surfactant sodium dodecyl sulfate(SDS) is used to enhance the leaching effect of an ion-absorbed rare earth ore by ameliorating the seepage effect for the first time.The effects of surfactant concentration,leaching agent dosage,solution flow velocity,and solution pH on the leaching rate were explored,and the mechanism of SDS was discussed.Under the optimum conditions,the addition of a small amount of SDS(mass fraction0.04%) can increase the leaching rate by about 5%,shorten the leaching period,and reduce the consumption of the leaching agent.SDS significantly ameliorates the seepage effect of the ore body by reducing the surface tension of the leaching agent and ameliorating the wettability of the mineral surface.This effect is the main factor that improves the leaching efficiency.DFT(density functional theory) calculation results show that SDS can react with rare earth ions,which reduces the adsorption strength on clay mineral surfaces.Hence,rare earth ions are easily exchanged by ammonium ions,and mass transfer is enhanced.

关键词： Ion-absorbed rare earth ore Surfactant Sodium dodecyl sulfate Leaching Seepage effect Adsorption

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对国内地铁线路标识色设计现状的分析和思考

包装工程 2024年第10期45卷 158-167页

作者：张博远方兴罗蕾武汉理工大学武汉430070

目的明晰我国地铁线路标识色设计现状,发现现存问题,为使线路标识色更好地适应大运量轨道交通情境提出新的设计策略。方法对相关学术文献和现有实践进行探讨;搜集并整理国内各城市已投入使用的地铁线路标识色,并依据孟塞尔系统对色彩的... 详细信息

目的明晰我国地铁线路标识色设计现状,发现现存问题,为使线路标识色更好地适应大运量轨道交通情境提出新的设计策略。方法对相关学术文献和现有实践进行探讨;搜集并整理国内各城市已投入使用的地铁线路标识色,并依据孟塞尔系统对色彩的色度属性进行分析;以问卷方式展开色彩舒适度调研,以探索地铁线路标识色色度属性对其舒适度的影响。结果阐释了当前国内地铁线路标识色设计实践的基本原则及对应的实施方法,将其设计诉求总结为功能和赋能两种层次,并梳理了其内部的六种向度;发现了关于色彩可读性和舒适性的规律。结论在地铁线路标识色设计中,色彩可读性的潜在影响常被忽略,其应被作为相关设计实践的重要考量因素;地铁线路标识色的舒适度受其明度对比的影响;提出了面向复杂地铁线网的色彩设计策略,以维系地铁信息界面兼顾辨识度和舒适度的色彩秩序。

关键词：地铁线路标识色现状调研可读性舒适性

维普期刊数据库博看期刊

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多重关系视角下心理咨询的伦理风险治理

医学与哲学 2024年第4期45卷 48-52页

作者：姜佳黄庆之张博源首都医科大学医学人文学院北京100069 北京市精神卫生保健所北京100088

多重关系是心理咨询的一项重要伦理议题,也是影响心理咨询服务质量的主要因素。以多重关系为视角,系统性梳理心理咨询的伦理风险、评析国内服务环境现状,解读域外伦理和法律规范的治理逻辑。对于心理咨询服务缺乏有效治理的问题,建议以... 详细信息

多重关系是心理咨询的一项重要伦理议题,也是影响心理咨询服务质量的主要因素。以多重关系为视角,系统性梳理心理咨询的伦理风险、评析国内服务环境现状,解读域外伦理和法律规范的治理逻辑。对于心理咨询服务缺乏有效治理的问题,建议以伦理规范为基础,在伦理规范中建立相应的预判机制、督导机制和约束机制,在立法中确定心理咨询师对多重关系的预防义务、风险应对义务,建立心理咨询督导制度。最终形成和完善由政府部门、行业协会等利益相关方参与的共同治理法治框架。

关键词：多重关系心理咨询伦理风险

真实分岔静脉下多种血液流变模型的溶栓治疗差异数值研究

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力学学报 2024年第5期56卷 1328-1341页

作者：程鸿宇林博远姜胜晖张祥雷周宏明温州大学机电工程学院浙江温州325035 温州职业技术学院浙江温州325035

静脉血栓栓塞(VTE)是一种常见的心血管疾病,建立基于计算流体力学(CFD)的数值模型是开展血栓治疗研究的重要手段.然而,血液的流变模型众多,多种血液流变模型之间存在显著的差异.目前,针对不同血液流变模型间的差异表现尚未得到充分研究... 详细信息

静脉血栓栓塞(VTE)是一种常见的心血管疾病,建立基于计算流体力学(CFD)的数值模型是开展血栓治疗研究的重要手段.然而,血液的流变模型众多,多种血液流变模型之间存在显著的差异.目前,针对不同血液流变模型间的差异表现尚未得到充分研究.本研究提出一种生物流体力学模型以用于静脉血栓治疗数值研究,研究考虑静脉血流、血管结构以及药物传质间的作用耦合,并将血液视为不同流变特性的7种流体、静脉瓣膜视为超弹性固体、血栓块视为多孔材料.针对患者理想化和特异性的血管模型进行数值模拟,综合分析静脉血栓的溶栓治疗数值结果.结果表明,患者特异性血管模型更接近实际血管情况,其受分岔、弯曲等局部特征的影响,流速变化明显、涡流强度和Pe较高、瓣膜位移值较大.同时,不同血液流变学模型的研究结果不同.在患者特异性模型下,牛顿模型的血液黏度较小,流速和Pe较大,物质传质更快,溶栓表现较优;非牛顿模型中Bingham流体表现差异最显著,其血液黏度值较高,Pe较小,溶栓表现较差.本研究提倡采用患者实际血管模型、考虑血液实际流变特性进行静脉血栓数值研究,以推动血栓治疗领域的数字医疗、智慧医疗技术进步.

关键词：静脉血栓血液流变特性生物流体力学溶栓治疗数值模拟

新修《民事诉讼法》中的网络侵权管辖研究——兼论涉外民事诉讼管辖规则

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天中学刊 2024年第3期39卷 32-42页

作者：张弛侯伯远北京大学法学院北京100871

我国现有网络侵权纠纷地域管辖规则难以实现当事人之间程序利益的平衡、司法资源与秩序利益的平衡、实体正义与程序正义的平衡。2023年《民事诉讼法》以适当联系为补充根据扩大了平行诉讼的可能性,以先受理和不方便法院的混合规则强化... 详细信息

我国现有网络侵权纠纷地域管辖规则难以实现当事人之间程序利益的平衡、司法资源与秩序利益的平衡、实体正义与程序正义的平衡。2023年《民事诉讼法》以适当联系为补充根据扩大了平行诉讼的可能性,以先受理和不方便法院的混合规则强化了法院的自由裁量权,增加了涉外网络侵权纠纷管辖规则的不确定性。国内和涉外民商事纠纷管辖规则均为民事诉讼管辖体系的重要组成部分,均具有民事诉讼本质和涉网特征,由此构成了网络侵权纠纷管辖体系的重塑动因。为解决当事人诉讼地位的差异、新兴权益保护的迫切需求、管辖规则与其他诉讼制度的衔接问题,应根据涉网程度不同,重塑“非网—弱网—强网—专网”的多层次管辖体系,以平衡网络侵权纠纷主体诉讼能力的差异,实现法院案件审判全流程的制度衔接,兼顾国内与涉外管辖规则的有机结合。

关键词：网络侵权地域管辖涉外民事诉讼互联网法院 2023年《民事诉讼法》