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SSRN 2024年

作者： Zuo, Weijing Li, Rui Wu, Xiangkun Guo, Yawei Wen, Bohua Luo, Jiayan Zhang, Lan CAS Key Laboratory of Green Process and Engineering Beijing KeyLaboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai200240 China Langfang Green Industrial Technology Center Institute of Process Engineering Chinese Academy ofSciences Hebei065001 China LongzihuNewEnergyLaboratory ZhengzhouInstituteofEmergingIndustrialTechnology Henan University Zhengzhou450000 China

High-areal-capacity electrodes and lean electrolyte are practical approaches for batteries to enhance their energy density, while it’s challenge for the lithium-sulfur batteries using nano-sized sulfurized polyacrylonitrile (SPAN) cathodes due to the sluggish charge transportation. Here, a spray-drying (SD) technique for mass production of micron-sized SPAN secondary particles (PC-SPAN) with composite coating is proposed. The composite involves polydopamine (PDA), polyacrylic acid (PAA) and polyvinyl alcohol (PVA) that physiochemically crosslinking. The rich catecholamine, hydroxyl and carboxyl groups not only construct strong and flexible adhesion among the SPAN primary particles to keep the electrode integrity, but also render built-in ion passage within the secondary particles to allow the electrode working under lean electrolyte condition. Consequently, PC-SPAN electrode with a high areal loading of 8.4 mg cm-2 delivers a higher specific capacity of 547.4 mAh g-1 at 0.3C when that of SPAN is less than 400.0 mAh g-1. In the meantime, prototype Li-SPAN battery with high energy density of 530.2 Wh kg-1 is achieved using PC-SPAN electrode with an areal capacity of 19.1 mAh cm-2 and low electrolyte/SPAN ratio of 0.93 μL mg-1, which demonstrates the feasibility of this strategy toward applicable high energy LSBs. © 2024, The Authors. All rights reserved.

关键词： Electrolytes

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Design of mesoporous ZnCoSiOx hollow nanoreactors with specific spatial distribution of metal species for selective CO_(2)hydrogenation

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Nano Research 2023年第4期16卷 5601-5609页

作者： Xinyao Wang Runping Ye Melis S.Duyar Cameron Alexander Hurd Price Hao Tian Yanping Chen Na Ta Hao Liu Jian Liu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Department of Chemical and Process Engineering University of SurreyGuildfordSurrey GU27XHUK Department of Chemical Engineering and Analytical Science University of ManchesterManchesterUK Centre for Clean Energy Technology University of Technology SydneySydneyBroadway NSW 2007Australia DICP-Surrey Joint Centre for Future Materials Advanced Technology InstituteUniversity of SurreyGuildfordSurrey GU27XHUK

In heterogeneous catalysis,the precise placement of active components to perform unique functions in cooperation with each other is a tremendous *** migration of matter on micro/nano-scale caused by diffusion is a promising pathway for design of catalytic nanoreactors with precise active sites location and controllable microenvironment through compartmentalization and confinement ***,we report two categories of mesoporous ZnCoSiOx hollow nanoreactors with different metal distributions and microenvironment engineered by the diffusion behavior of metal species in confined ***-shelled hollow structures with well-distributed metal species were obtained by adopting core@shell structured ZnCo-zeolitic imidazolate framework(ZIF)@SiO2 as a template and employing three stages of hydrothermal treatment including the decomposition of ZIF,diffusion of metal species into the silica shell,and Ostwald ***,the formation of yolk@shell structure with a collective(Zn-Co)metal oxide as the yolk was achieved by direct pyrolysis of ZnCo-ZIF@*** CO_(2)hydrogenation,ZnCoSiOx with double-shelled hollow structures and yolk@shell structures respectively afford CO and CH_(4)as main product,which is related with different dispersion and location of active sites in the two *** study provides an efficient method for the synthesis of catalytic nanoreactors on the basis of insights of the atomic diffusion in confined space at the mesoscale.

关键词： mesoporous materials structure-activity relationships supported catalysts metal-organic frameworks nanostructures

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Zr-Modulated N Doping for Enhancing the Performance in the Direct Synthesis of Ethylene Carbonate from Ethylene Glycol and CO2

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SSRN 2023年

作者： Huang, Jielin Wang, Jie Duan, Haonan Dong, Li Chen, Songsong Zhang, Junping Zhang, Xiangping School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Advanced Energy Science and Technology Guangdong Laboratory Guangdong Huizhou516003 China

Acidic and basic sites of catalysts are essential tools in CO2 capture and activation. This work fabricated Zr, N-ZnO/ZnAl-LDH-IL composites in ionic liquid and methanol systems and was used to catalyze the synthesis of ethylene carbonate from ethylene glycol and CO2. The prepared composites have a high specific surface area of 205.542 m2 g-1. The Zr, N-ZnO/ZnAl-LDH-IL composites has a 4.16 times increase in the strong basic sites compared to N-ZnO/ZnAl-LDH-IL, mainly attributed to the fact that Zr-doped effectively induced changes in the reactive groups on the catalyst surface, increasing the percentage of pyridinic-N groups from 5.48% to 22.25%, inducing more C-atoms adjacent to pyridinic-N to exhibit strongly basic sites favoured the activation of CO2 and ethylene glycol. The experimental results show that the Zr, N-ZnO/ZnAl-LDH-IL composites have the best catalytic performance without adding any dehydrating agent at about 4.76 mmolEC gCat.-1 h-1. In addition to elucidating the possible catalytic pathways and reaction mechanisms of the composites for ethylene glycol and CO2 catalysis, we have also investigated the doping of La, Fe, Ce and Cu. Current work also indicates that controlling the acid-base centers on the surface of materials by ionic liquids and methanol solvents is an effective strategy. © 2023, The Authors. All rights reserved.

关键词： Chemical activation

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Localization-enhanced moiréexciton in twisted transition metal dichalcogenide heterotrilayer superlattices

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Light(Science & Applications) 2023年第6期12卷 1020-1028页

作者： Haihong Zheng Biao Wu Shaofei Li Junnan Ding Jun He Zongwen Liu Chang-Tian Wang Jian-Tao Wang Anlian Pan Yanping Liu School of Physics and Electronics Hunan Key Laboratory for Supermicrostructure and Ultrafast ProcessCentral South University932 South Lushan Road410083 ChangshaHunanChina State Key Laboratory of HighPerformance Complex Manufacturing Central South University932 South Lushan Road410083 ChangshaHunanChina School of Chemical and Biomolecular Engineering The University of SydneySydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneySydneyNSW 2006Australia Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences100190 BeijingChina School of Physical Sciences University of Chinese Academy of Sciences100049 BeijingChina Songshan Lake Materials Laboratory 523808 DongguanGuangdongChina Hunan Institute of Optoelectronic Integration College of Materials Science and EngineeringHunan University410082 ChangshaHunanChina Shenzhen Research Institute of Central South University 518000 ShenzhenChina

The stacking of twisted two-dimensional(2D)layered materials has led to the creation of moirésuperlattices,which have become a new platform for the study of quantum *** strong coupling of moirésuperlattices can result in flat minibands that boost electronic interactions and generate interesting strongly correlated states,including unconventional superconductivity,Mott insulating states,and moiré***,the impact of adjusting and localizing moiréexcitons in Van der Waals heterostructures has yet to be explored ***,we present experimental evidence of the localization-enhanced moiréexcitons in the twisted WSe_(2)/WS_(2)/WSe_(2)heterotrilayer with type-II band *** low temperatures,we observed multiple excitons splitting in the twisted WSe_(2)/WS_(2)/WSe_(2)heterotrilayer,which is manifested as multiple sharp emission lines,in stark contrast to the moiréexcitonic behavior of the twisted WSe_(2)/WS_(2)heterobilayer(which has a linewidth 4 times wider).This is due to the enhancement of the two moirépotentials in the twisted heterotrilayer,enabling highly localized moiréexcitons at the *** confinement effect of moirépotential on moiréexcitons is further demonstrated by changes in temperature,laser power,and valley *** findings offer a new approach for localizing moiréexcitons in twist-angle heterostructures,which has the potential for the development of coherent quantum light emitters.

关键词： twisted layer quantum

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Edge-enriched N, S co-doped hierarchical porous carbon for oxygen reduction reaction

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Chinese Chemical Letters 2023年第2期34卷 349-354页

作者： Fangfang Chang Panpan Su Utsab Guharoy Runping Ye Yanfu Ma Huajun Zheng Yi Jia Jian Liu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Department of Applied Chemistry and Zhejiang Carbon Neutral Innovation Institute Zhejiang University of TechnologyHangzhou 310032China DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process EngineeringUniversity of SurreyGuildfordSurrey GU27XHUnited Kingdom

The development of carbon materials with high electrochemical performance for next-generation energy device is emerging, especially N, S co-doped carbon materials have sparked intensive attention. However,the exploration of N, S co-doped carbon with well-defined active sites and hierarchical porous structures are still limited. In this study, we prepared a series of edge-enriched N, S co-doped carbon materials through pyrolysis of thiourea(TU) encapsulated in zeolitic imidazolate frameworks(TU@ZIF) composites,which delivered very good oxygen reduction reaction(ORR) performance in alkaline medium with onset potential of 0.94 V vs. reversible hydrogen electrode(RHE), good stability and methanol tolerance. Density functional theory(DFT) calculations suggested that carbon atoms adjacent to N and S are probable active sites for ORR intermediates in edge-enriched N, S co-doped carbon materials because higher electron density can enhance O_(2)adsorption, lower formation barriers of intermediates, improving the ORR performance comparing to intact N, S co-doped carbon materials. This study might provide a new pathway for improving ORR activity by the integration engineering of edge sites, and electronic structure of heteroatom doped carbon electrocatalysts.

关键词： Porosity engineering N S co-doped carbon materials Hierarchical porous carbon Edge-enriched carbon Oxygen reduction reaction DFT calculation

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Insight into CO2/CH4 Separation by Ionic Liquids Confined in Mxene Membrane from Molecular Level

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SSRN 2024年

作者： Zhang, Xiaochun Xu, Peng Kong, Yunhan Liu, Yiming Zhang, Xiangping Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology Shanghai200237 China State Key Laboratory of Organic-Inorganic Composites College of Chemical Engineering Beijing University of Chemical Technology Beijing100029 China College of Chemical Engineering and Environment China University of Petroleum Beijing102249 China Shenyang University of Chemical Technology Liaoning 110142 China Bohai University China

Composite membranes incorporating ionic liquids (ILs) within MXene demonstrate promising potential for CO2 separation. However, studies on the separation of CO2/CH4 using MXene-confined ILs membranes are limited, especially in terms of understanding the mechanisms at the molecular level. In this work, the system of CO2/CH4 in MXene-confined ILs membranes was studied by molecular dynamic simulations. The number density results reveal that MXene stratifies the ILs between the layers, with higher concentrations of ILs near MXene and lower concentrations in the middle layer. Notably, MXene has a greater impact on cations distribution compared to anions. As the layer spacing of MXene expands from 1.5 to 3nm, the interaction between MXene and IL weakens, while that between the cations and anions strengthens. The confined ILs enhance gas adsorption capability but impede gas diffusion. CO2 is distributed closer to anions, while CH4 tends to be closer to cations, with the distance between CH4 and cations decreasing as the layer spacing increases. Additionally, with the increase of layer distance, the proportion of confined ILs gradually decreases, and the gas diffusion coefficient gradually increases. Furthermore, compared to [EMIM][BF4] and [EMIM][PF6], MXene-confined [EMIM][TF2N] is identified as the most effective for CO2/CH4 separation, owing to its superior CO2 dissolution and highest diffusion selectivity. © 2024, The Authors. All rights reserved.

关键词： Ionic liquids

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Plain metallic biomaterials:opportunities and challenges

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Regenerative Biomaterials 2023年第1期10卷 140-147页

作者： Jiazhen Zhang Bao Zhai Jintao Gao Zheng Li Yufeng Zheng Minglong Ma Yongjun Li Kui Zhang Yajuan Guo Xinli Shi Bin Liu Guobiao Gao Lei Sun Center for Medical Device Evaluation National Medical Product AdministrationBeijing 100081China Guangdong-Hong Kong-Macao Greater Bay Area Center for Medical Device Evaluation and Inspection of NMPAShenzhen 518045China School of Materials Science and Engineering Peking UniversityBeijing 100871China State Key Laboratory of Nonferrous Metals and Process GRINM Group Corporation Limited(General Research Institute for Nonferrous Metals)Beijing 100088China

The‘plainification of materials’has been conceptualized to promote the sustainable development of *** perspective,for the first time in the field of biomaterials,proposes and defines‘plain metallic biomaterials(PMBs)’with demonstrated research and application case studies of pure titanium with high strength and toughness,and biodegradable,fine-grained and high-purity ***,after discussing the features,benefits and opportunities of PMBs,the challenges are analyzed from both technical and regulatory *** perspectives on PMB-based medical devices are also provided for the benefit of future research,development and commercialization.

关键词： plainification metallic biomaterials regulatory science medical devices pure titanium high-purity magnesium

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基于嫦娥五号月球样品的月壤残余内摩擦角预测

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Science Bulletin 2023年第7期68卷 730-739页

作者：聂家岩崔一飞 Kostas Senetakis 郭丹王瑜王国栋冯鹏贺怀宇张徐航张小平李存惠郑虎胡伟牛富俊刘权兴李安原 State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China School of Civil Engineering Wuhan UniversityWuhan 430072China Department of Architecture and Civil Engineering City University of Hong KongHong Kong 999077China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Key Laboratory of Mountain Hazards and Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Department of Civil Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsLanzhou 730000China Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China South China Institute of Geotechnical Engineering South China University of TechnologyGuangzhou 510641China School of Mathematical Sciences Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province Shaoxing UniversityShaoxing 312000China

随着人类探月工程的快速发展,月球基地建设以及月表资源开发利用有望更快实现,合理预测月壤工程力学性质对于未来深层次探月工程意义重大,我国嫦娥五号返回月球样品为研究月壤工程力学特性提供了直接的实测材料。然而,月球样品极其珍贵... 详细信息

随着人类探月工程的快速发展,月球基地建设以及月表资源开发利用有望更快实现,合理预测月壤工程力学性质对于未来深层次探月工程意义重大,我国嫦娥五号返回月球样品为研究月壤工程力学特性提供了直接的实测材料。然而,月球样品极其珍贵,难以满足传统土工试验测试.为了应对这一科学挑战,本研究从无损分析月球样品颗粒属性入手,使用高精度X-射线μCT扫描、三维白光干涉、原子力显微镜等无损测试手段,分析了不同类型月壤颗粒的三维多尺度形态、弹性力学和摩擦属性等指标.在此基础上,基于颗粒材料宏微观物理力学理论和数值模型尝试预测了嫦娥五号采样处月壤残余内摩擦角。本研究为基于月球样品信息跨尺度分析月壤工程力学性质提供了可行思路。

关键词： Chang’e-5 lunar samples Geometry Mechanics Tribology Residual friction angle Cross-scale prediction

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Physical Mixing of K2co3/Al2o3 and Poly(Divinylbenzene) to Promote Cos Removal from Blast Furnace Gas with High Humidity at Low Temperature

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SSRN 2024年

作者： Jia, Liwei Zheng, Yuhua Li, Yuran Zhu, Tingyu Cui, Yanbin State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

Blast furnace gas (BFG) is a high emission and widely used secondary energy source. However, the presence of sulfide in BFG leads to environment pollution. Carbonyl sulfide (COS) is the main (70%) sulfide in BFG. Catalytic hydrolysis is an important method for COS removal, but the excessive water contained in BFG can significantly inhibit the performance of hydrolysis catalyst. In present work, K2CO3 was loaded on Al2O3 support using wet impregnation method to improve its hydrolysis efficiency. Moreover, a physical mixing method was employed to combine K2CO3/Al2O3 with hydrophobic poly(divinylbenzene) (PDVB) to improve the water resistance of K2CO3/Al2O3. It was found that a simple physical mixture of PDVB with K2CO3/Al2O3 could modulate the local environment of K2CO3/Al2O3, shifting the water-sorption equilibrium on the surface of the catalyst and releasing partial water-covered catalyst surface for hydrolysis. Under the reaction temperature of 90 ℃ and water vapor content of 34.4 g/m3, the hydrolysis efficiency of COS increased by ~22.5% via mixing K2CO3/Al2O3 with PDVB. This approach demonstrates the potential to enhance the hydrolysis efficiency of catalyst for COS removal from BFG with high humidity at low temperature, which is crucial for the practical application of desulfurization of BFG. © 2024, The Authors. All rights reserved.

关键词： Hydrolysis

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Research progress of CRISPR/Cas systems in nucleic acid detection of infectious diseases

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iLABMED 2023年第1期1卷 58-74页

作者： Jinying Dong Yuguang Du Lei Zhou National Key Laboratory of Biochemical Engineering PLA Key Laboratory of Biopharmaceutical Production&Formulation EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Innovation Academy for Green Manufacture Institute Chinese Academy of SciencesBeijingChina Biosafety Research Center Yangtze River Delta in Zhangjiagang SuzhouChina

Infectious diseases are a serious threat to human health,and accurate,rapid and convenient early detection of pathogens is the first step of active *** that detect pathogens have advanced significantly because of the development of fundamental disciplines and the integration of multidisciplinary *** these technologies,nucleic acid detection technology is preferred because of its rapid measurement,accuracy and high *** CRISPR/Cas system,consisting of Clustered Regularly Interspaced Short Palindromic Repeats(CRISPR)and CRISPR‐associated(Cas),is an adaptive immune system that specifically recognizes,binds and cleaves exogenous invasive nucleic *** CRISPR/Cas system is widely found in bacteria and *** have developed nucleic acid detection technologies with single‐molecule sensitivity,single‐base precision specificity,portability and low cost based on the specific cleavage and trans‐cleavage activities of the CRISPR/Cas *** next generation of in‐vitro diagnostics is shifting to nucleic acid technology because this technology shows promise in a wide range of applications in resource‐constrained *** this review,the development and mechanism of the CRISPR/Cas system are presented together with representative CRISPR/Cas applications in nucleic acid ***,the review summarizes future perspectives and trends of the CRISPR/Cas system in nucleic acid detection.

关键词： CRISPR/Cas system nucleic acid fluorescence electrochemical chromogenic

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