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Balanced Polysulfide Containment and Lithium Ion Transport in Lithium-Sulfur Batteries via Nitrogen-doped Carbon Hollow Multi-shelled Structures on Modified Separators

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Chemical Research in Chinese Universities 2024年第4期40卷 690-698页

作者： RAO Fu XIAO Qian wei yanze WANG Jiangyan YU Ranbo WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BeijingBeijing100083P.R.China

Representing the next-generation technology in lithium-ion batteries,lithium-sulfur(Li-S)batteries offer increased specific energy without relying on scarce metals like nickel and cobalt,but suffer from a low practical specific energy due to poor conductivity and a short lifespan due to the shuttle effect of *** the confinement of polysulfides and the transport of lithium ions requires highly elaborate modifiers for *** multi-shelled structures(HoMSs)show promise as hierarchical mesostructures for separators,offering multiple shell layers and internal cavities that effectively inhibit polysulfide *** design of these structures is crucial to address these challenges *** this study,nitrogen-doped carbon HoMS(NC HoMS)was created using polymer templates through a precisely controlled polymerization *** featuring NC HoMS-modified separators exhibit improved capacity and cycling stability in comparison to those utilizing commercial ***,triple-shelled NC HoMS strikes a balance in polysulfide containment and lithium ion *** a sulfur loading of 6.34 mg/cm^(2),the Li-S battery can consistently complete 100 charge-discharge cycles,starting with a discharge capacity of 966.4 mA·h/g with a 75.8%capacity retention *** HoMS holds potential as the separator modifier in addressing the polysulfide shuttle problem and facilitating the Li-ion transportation for advanced Li-S batteries.

关键词： Hollow multi-shelled structure Carbon material Li-S battery Separator modification Shuttle effect

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Boosting the Activity and Stability of the Photoreduction of Diluted CO_(2) by Copper Oxide Decorated CeO_(2) Hetero-shells

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Chemical Research in Chinese Universities 2024年第3期40卷 513-520页

作者： XIAO Mingjiao LI Di wei yanze HE Yilei WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BejingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing 100190P.R.China

Inspired by the natural photosynthesis systems,the integrated harnessing and conversion of CO_(2) present a promising solution for addressing the ever-rising global atmospheric concentration of CO_(2).Hollow multi-shelled structured(HoMS)photocatalysts,featuring alternating shells and cavities,have recently gained recognition as efficient nano-reactors for capturing CO_(2) molecules and facilitating effective photoreduction within these hierarchical structures,leveraging the preeminent enrichment *** this work,to augment the photocatalytic efficacy of HoMS in CO_(2) treatment,highly dispersed Cu_(x)O nanoparticles(NPs)were incorporated on the CeO2 shells through a polymer-assisted impregnation method to create more active sites and strengthen the interaction between the hetero-shells and CO_(2) *** photoreduction of the CO_(2)-to-CO rate under a diluted CO_(2)(15%,volume fraction)atmosphere is improved by the introduction of Cu_(x)O NPs,with the highest CO yielding rate reaching 120µmol·h^(−1)·g^(−1) without any sacrificial *** comparison experiments and theoretical calculations reveal that the Cu_(x)O NPs promote the adsorption of CO_(2) molecules in HoMS,accelerate the charge transfer efficiency,and stabilize the surface oxygen vacancies(Ovs)during the photoreduction CO_(2) conversion *** hope these easy-to-prepare HoMS nanoreactors can contribute to the effective enrichment and valorization of CO_(2) in industrial exhaust gases.

关键词： Photoreduction CO_(2) Cu_(x)O/CeO_(2)hollow multi-shell structure(HoMS) Hetero-shell

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Ti-MOF Derived N-Doped TiO2 Nanostructure as Visible-light-driven Photocatalyst

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Chemical Research in Chinese Universities 2020年第3期36卷 447-452页

作者： HE Yilei ZHANG Xing wei yanze CHEN Xiaoyu WANG Zumin YU Ranbo Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversiw of Science and Technology BeijingBeijing 100083P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Advanced Material Processing&Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002P.R.China

Nanostructured N-doped TiO2 photocatalyst has been prepared via a new approach from Ti-based MOF[NH2-MIL-125(Ti)]*** success of N doping enhances light absorption and narrows the ***,the as-prepared nanostructure is constructed with tiny nanoparticles and resembles a pie-like morphology inherited from the MOF,which accelerates electron ***,as a photocatalyst for the degradation of methylene blue(MB)under visible light irradiation,the N-doped TiO2(N-TiO2)nanostructure shows higher photocatalytic activity with a reaction rate constant of 0.018min^-1 than that of the TiO2-P25 and TiO2 under the visible light.

关键词： TiO2 Mctal-organic framcwork Photo-degradaton N doped Visible-light photocatalysis

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Multi-shelled TiO2/Fe2TiO5 heterostructured hollow microspheres for enhanced solar water oxidation

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Nano Research 2017年第11期10卷 3920-3928页

作者： Muhammad Waqas yanze wei Dan Mao Jian Qi Yu Yang Bao Wang Dan Wang State Key Laboratory of Biochemical Engineering CAS Center for Excellence in Nanoscience Institute of Process Engineering Chinese Academy of Sciences 1 North 2nd Street Zhongguancun Haidian District Beijing 100190 China Department of Physical Chemistry School of Metallurgical and Ecological Engineering University of Science & Technology Beijing No.30 Xueyuan Road Haidian District Beijing 100083 China University of Chinese Academy of Sciences Chinese Academy of Sciences No.19A Yuquanlu Beijing 100049 China

There remains a pressing challenge in the fabrication of superior photocatalysts for light-driven water ***,we designed and fabricated heterostructured TiO2/Fe2TiO5 hollow microspheres with single-,double-,closed-double-,triple-,and core-shell structures and different Fe/Ti molar ratios using a facile sequential templating *** closed-double-shelled TiO2/Fe2TiO5 hollow microspheres with 35% Fe exhibited the highest oxygen evolution reaction rate up to 375 μmol＆#183;g-1＆#183;h-1 and good stability for 5 *** high performance can be attributed to the closed-double shell,which had more reactive sites and greater light-harvesting ability,self-supported thin shells with short charge-transfer paths,and a favorable staggered band alignment between the TiO2 and Fe2TiOs.

关键词： multi-shelled hollow microsphere titanium oxide pseudo-brookite heterostructure photocatalytic water oxidation

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Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores

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National Science Review 2020年第11期7卷 1638-1646页

作者： yanze wei Jiawei Wan Nailiang Yang Yu Yang Yanwen Ma Songcan Wang Jiangyan Wang Ranbo Yu Lin Gu Lianhui Wang Lianzhou Wang wei Huang Dan Wang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology Beijing University of Chinese Academy of Sciences Chinese Academy of Sciences School of Materials Science and Engineering Nanjing University of Posts and Telecommunications School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology The University of Queensland Department of Materials Science andEngineering Stanford University Institute of Physics Chinese Academy of Sciences

In nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanoparticle subunits. Structurally, Ho MSs consist of different band-gap materials outside-in, thus realizing the efficient harvesting of light with different wavelengths. Moreover, introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption. With the benefit of sequential harvesting of light in Ho MSs, the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles. Impressively, using these aforementioned materials as photocatalysts,highly efficient photocatalytic water splitting is realized, which cannot be achieved by using the nanoparticle counterparts. This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.

关键词： light harvesting hollow structures multi-shelled solar energy conversion

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Accuracy evaluation for in-situ machining reference points binocular measurement based on credibility probability

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Chinese Journal of Aeronautics 2024年第1期37卷 472-486页

作者： Binchao YU wei LIU yanze ZHANG Dazhi MA Zhenyuan JIA Yi YUE Jiabo ZHANG Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education Dalian University of TechnologyDalian 116024China Beijing Spacecrafts China Academy of Space TechnologyBeijing 100081China

Passive binocular measurement systems are being increasingly utilized in the in-situ industries of automobiles,aviation,and aerospace,*** to their excellent qualities of accuracy,efficiency,and cost *** the barrier of evaluating the accuracy of measured objects resulted from the unequal equivalent focal length and quantization of pixels,has limited their further development and application of high requirements for in-situ machining,e.g.,the measurement of machining reference points for the positioning of robotic drilling in aerospace *** this paper,an accuracy evaluation method is proposed to address the ***,the unequal equivalent focal length is considered to improve the accuracy of 3D ***,the credibility probability model is developed to calculate the probability of the observed error in the public view of the binocular measurement system and indicates the direction of ***,the in-situ experiment is carried out to validate the method within the effective public view range of 300 mm×300 *** experiment results show that the RMSs of observed errors are superior to 0.035 mm,and the credibility probabilities are all higher than 0.91;the maximum 3D reconstruction accuracy improvement is 60.3%,with the error reduced from 0.078 mm to 0.031 mm.

关键词： Aerospace manufacturing Binocular vision Credibility probability Pixel quantization Unequal equivalent focal length

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Integrative self-assembly of covalent organic frameworks and fluorescent molecules for ultrasensitive detection of a nerve agent simulant

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Science China Materials 2021年第5期64卷 1189-1196页

作者： Yanjun Gong Yongxian Guo Changkun Qiu Zongze Zhang Fenghua Zhang yanze wei Shuping Wang Yanke Che Jingjing wei Zhijie Yang Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Binding of fluorescent molecules to the porous matrix through noncovalent interactions will synergistically expand their application spectrum. In this regard, we report an integrative self-assembly of molecule 1 with benzothiadizole and 9,9-dihexyl fluorene units, and covalent organic frameworks(COFs) via an emulsion-modulated polymerization process, within which molecules of 1 are able to interact with the scaffolds of COFs through CH-π interactions. Thus the π-πinteractions between the fluorescent molecules are largely suppressed, giving rise to their remarkable monomer-like optical properties. Of particular interest is that, given by the specific interaction between COFs and a nerve agent simulant diethyl chlorophosphite(DCP), these assembled composites show the ability of ultrasensitive detection of DCP with a detection limit of ~40 ppb. Moreover, the present integrative assembly strategy can be extended to encapsulate multiple fluorescent molecules, enabling the assemblies with white light emission. Our results highlight opportunities for the development of highly emissive porous materials by molecular selfassembly of fluorophores and molecular units of COFs.

关键词： covalent organic frameworks sensor noncovalent interactions nerve agent self-assembly

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高效光能转换新媒介:中空多壳层结构材料

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科学通报 2019年第34期64卷 3577-3593页

作者：魏延泽王祖民于然波北京科技大学冶金与生态工程学院物理化学系北京00083 中国科学院过程工程研究所生化工程国家重点实验室北京100190 郑州大学材料成型过程及模具教育部重点实验室郑州450001

光能的捕获和利用为环境、能源和医学等多个领域的发展提供了广阔的前景.为了实现高效的光能转换,对作为媒介的光功能材料的设计至关重要.作为一种新兴的多级微纳材料,中空多壳层结构(hollow multi-shelled structures,HoMSs)材料在光... 详细信息

光能的捕获和利用为环境、能源和医学等多个领域的发展提供了广阔的前景.为了实现高效的光能转换,对作为媒介的光功能材料的设计至关重要.作为一种新兴的多级微纳材料,中空多壳层结构(hollow multi-shelled structures,HoMSs)材料在光能转换领域中具有诸多优势,其高效的光捕获能力、增强的光生电荷分离能力和灵活可调的壳壁组成等结构特性都能够有效提高材料对光能的转换效率.本文从HoMSs光功能材料在光能转换过程中的优势出发,总结了其在光催化、太阳能电池和光致发光等光能转换领域中的应用研究进展,并对该领域的发展趋势进行了展望.

关键词：中空多壳层结构微纳材料光能转化光功能材料光催化

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含烯丙基的三元酚型苯并噁嗪的合成及性能

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高等学校化学学报 2014年第11期35卷 2494-2498页

作者：朱春莉柏海见耿鹏飞魏延泽鲁在君山东大学化学与化工学院特种功能聚集体材料教育部重点实验室济南250100 中国石油兰州石化公司研究院兰州730060

以合成的1,3,5-三(p-羟基苯基)苯(TP)、烯丙基胺和甲醛为原料,合成了一种新型的含烯丙基的三元酚型苯并噁嗪单体——1,3,5-三(3-烯丙基-3,4-二氢-2H-1,3-苯并噁嗪基)苯(tp-ala).采用核磁共振谱、傅里叶变换红外光谱、紫外-可见吸收光谱... 详细信息

以合成的1,3,5-三(p-羟基苯基)苯(TP)、烯丙基胺和甲醛为原料,合成了一种新型的含烯丙基的三元酚型苯并噁嗪单体——1,3,5-三(3-烯丙基-3,4-二氢-2H-1,3-苯并噁嗪基)苯(tp-ala).采用核磁共振谱、傅里叶变换红外光谱、紫外-可见吸收光谱和差示扫描量热表征了tp-ala的结构和固化行为,用热失重分析、动态热机械分析和荧光光谱测试了固化物P-tp-ala的热性能及光学性能.结果表明,烯丙基的引入使P-tp-ala玻璃化转变温度高达322℃,5%的热失重温度为351℃,800℃残炭率达到61.4%,与不含烯丙基的三元酚型苯并噁嗪相比具有较好的耐热性.在233 nm激发波长下,P-tp-ala的荧光发射波长为350 nm,具有荧光性能.由于P-tp-ala中的芳香含量高,使其折射率高达1.6325,在防折射涂层方面有很好的应用潜力.

关键词：含烯丙基的三元酚型聚苯并噁嗪热性能光学性能

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异质中空结构微纳材料的构建

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高等学校化学学报 2020年第12期41卷 2561-2576页

作者：沈明辉魏延泽徐楠王祖民杨乃亮于然波王丹北京科技大学冶金与生态工程学院北京100083 中国科学院过程工程研究所生化工程国家重点实验室北京100190 中国科学院大学化学工程学院北京100049

异质中空结构是指壳层由不同成分组成的空心微纳结构.通过对异质中空结构的表面性质和传质过程进行调控,可以调控经过中空结构的物质及能量.目前,异质中空结构在太阳能转化、气体传感、电化学储能和药物运输等领域展示出了优异的性能,... 详细信息

异质中空结构是指壳层由不同成分组成的空心微纳结构.通过对异质中空结构的表面性质和传质过程进行调控,可以调控经过中空结构的物质及能量.目前,异质中空结构在太阳能转化、气体传感、电化学储能和药物运输等领域展示出了优异的性能,对异质中空结构的设计与构建已成为新型多功能先进材料研究的前沿领域.本文总结了异质中空结构的种类、特征和性能优势,重点描述了各类异质中空结构的制备方法,并探讨了异质中空结构微纳材料面临的挑战及发展趋势.

关键词：异质中空微纳结构合成能源材料

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