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co.structing high-toughness polyimide binder with robust polarity and ion-co.ductive mechanisms ensuring long-term operational stability of silico.-based anodes

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Journal of Energy Chemistry 2024年第6期93卷 580-591,I0014页

作者： Yongjun Kang Nanxi Dong Fangzhou Liu Daolei Lin Bingxue Liu Guofeng Tian Shengli Qi Dezhen Wu State Key Laboratory of chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China ENFI R&D Institute China ENFI Engineering CorporationBeijing 100038China China Automotive Battery Research Institute co. Ltd.Beijing 101407China Changzhou Institute of Advanced Materials Beijing University of Chemical TechnologyChangzhou 213164JiangsuChina

Silico.-based materials have demonstrated remarkable potential in high-energy-density batteries owing to their high theoretical ***,the significant volume expansion of silico. seriously hinders its utilization as a lithium-ion ***,a functionalized high-toughness polyimide(PDMI) is synthesized by co.olymerizing the 4,4'-Oxydiphthalic anhydride(ODPA) with 4,4'-oxydianiline(ODA),2,3-diaminobenzoic acid(DABA),and 1,3-bis(3-aminopropyl)-tetramethyl disiloxane(DMS).The co.bination of rigid benzene rings and flexible oxygen groups(-O-) in the PDMI molecular chain via a rigidness/softness co.pling mechanism co.tributes to high *** plentiful polar carboxyl(-co.H) groups establish robust bonding *** ionic transport is achieved by inco.porating the flexible siloxane segment(Si-O-Si),which imparts high molecular chain motility and augments free volume holes to facilitate lithium-ion transport(9.8 × 10^(-10) cm^(2) s^(-1) vs.16 × 10^(-10) cm^(2) s~(-1)).As expected,the SiO_x@PDMI-1.5 electrode delivers brilliant long-term cycle performance with a remarkable capacity retention of 85% over 500 cycles at 1.3 A g^(-1).The well-designed functionalized polyimide also significantly enhances the electrochemical properties of Si nanoparticles ***,the assembled SiO_x@PDMI-1.5/NCM811 full cell delivers a high retention of 80% after 100 *** perspective of the binder design strategy based on polyimide modification delivers a novel path toward high-capacity electrodes for high-energy-density batteries.

关键词： Polyimide binder High toughness Robust ionic transport Silico.-based anodes Lithium-ion batteries

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Highly efficient catalyst for 1,1,2-trichloroethane dehydrochlorination via BN_(3) frustrated Lewis acid-base pairs

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Nano Research 2024年第6期17卷 4773-4781页

作者： Yuxue Yue Fangmin Zuo Bolin Wang Xiaoling Xian Jun Tang Haifeng Zhang Zilong Zhang Qingping Ke Wei Chen School of chemical Engineering Northeast Electric Power UniversityJilin 132012China Industrial Catalysis Institute of zhejiang University of Technology Hangzhou 310014China Key Laboratory of Carbon Materials of zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China co.lege of Chemistry and chemical Engineering Anhui University of TechnologyMaanshan 243002China

In this study,a novel non-metallic carbon-based catalyst co.doped with boron and nitrogen(B,N)was successfully *** precisely co.trolling the carbonization temperature of a binary mixed ionic liquid,we selectively modified the doping site structure,ultimately co.structing a B,N co.doped frustrated Lewis acid-base pair *** catalyst exhibited remarkable catalytic activity,selectivity,and stability in the dehydrochlorination reaction of 1,1,2-trichloroethane(TCE).Detailed characterization and theoretical calculations revealed that the primary active center of this catalyst was the BN_(3)*** to co.ventional graphitic N structures,the BN_(3)structure had a higher p-band center,ensuring superior adsorption and activation capabilities for TCE during the *** the BN_(3)site,three negatively charged nitrogen atoms acted as Lewis bases,while positively charged boron atoms acted as Lewis *** synergistic interaction facilitated the specific dissociation of chlorine and hydrogen atoms from TCE,significantly enhancing the 1,1-dichloroethene *** this research,we not only explored the active site structure and catalytic mechanism of B,N co.doped catalysts in depth but also provided an efficient,selective,and stable catalyst for the dehydrochlorination of TCE,co.tributing significantly to the development of non-metallic catalysts.

关键词： B N co.doped sites dehydrochlorination frustrated Lewis acid-base pairs catalytic mechanism

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Facet effects on bimetallic ZnSn hydroxide microcrystals for selective electrochemical co. reduction

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Green Energy & Environment 2024年第8期9卷 1314-1320页

作者： Liu Han Cheng-wei Wang Shan-shan Luo Ying-tang Zhou Bing Li Ming Liu School of Chemistry and chemical Engineering Harbin Institute of Technology National Engineering Research Center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean University

Employing crystal facets to regulate the catalytic properties in electrocatalytic carbon dioxide reduction reaction（eco.RR） has been well demonstrated on electrocatalysts co.taining single metals but rarely explored for bimetallic systems. Here, we synthesize Zn Sn（OH）6（ZSO）microcrystals（MCs） with distinct facets and investigate the facet effects in eco.RR. Electrochemical studies and in situ Fourier Transform Infrared Spectrosco.y（in situ-FTIR） reveal that ZSO MCs produce mainly C1 products of Hco.H and co. The {111} facet of the ZSO MCS exhibits higher selectivity and faradaic efficiency（FE） than that of the {100} facet over a wide range of potentials（-0.9 V ～-1.3 V versus RHE）. Density Functional Theory（DFT） calculations elucidate that the {111} facet is favorable to the adsorption/activation of co.molecules,the formation of intermediate in the rate-determining step, and the desorption of C1 products of co.and Hco.H molecules.

关键词： ZnSn(OH) 6 Crystal facets Electrochemical carbon dioxide reduction C1 product Density functional theory

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Turnip mosaic virus pathogenesis and host resistance mechanisms in Brassica

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Horticultural Plant Journal 2024年第4期10卷 947-960页

作者： Guanwei Wu Xinxin Fang Tianqi Yu Jianping Chen Fei Yan State Key Laboratory for Managing Biotic and chemical Threats to the Quality and Safety of Agro-products Institute of Plant VirologyNingbo UniversityNingboZhejiang 315211China Key Laboratory of Biotechnology in Plant Protection of MARA and zhejiang Province Institute of Plant VirologyNingbo UniversityNingboZhejiang 315211China

Turnip mosaic virus(TuMV)is a devastating potyvirus pathogen that infects a wide variety of both cultivated and wild Brassicaceae *** urgently need more information and understanding of TuMV pathogenesis and the host responses involved in disease development in cruciferous *** displays great versatility in viral pathogenesis,especially in its replication and intercellular ***,in the co.volutionary arms races between TuMV and its hosts,the virus has evolved to co.opt host factors to facilitate its infection and co.nter host defense *** review mainly focuses on recent advances in understanding the viral factors that co.tribute to the TuMV infection cycle and the host resistance mechanism in ***,we propose some future research directions on TuMV pathogenesis and co.trol strategies to design durable TuMV-resistant Brassica crops.

关键词： Turnip mosaic virus Brassica Resistance genes Host factors Infection biology

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Ultrathin and flexible MXene-co.tained electromagnetic interference shielding co.posite paper designed with a protective hydrogel film

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Journal of Materials Science & Technology 2024年第2期169卷 199-208页

作者： Jiasheng Wei Lei Dai Ping He Meng Zhu Feng Jiang Zhaoxiang Zhou Guiqiang Fei Tingzhou Lei co.lege of Bioresources chemical and Materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Key Laboratory of Eco.Textiles Ministry of EducationJiangnan UniversityWuxi 214122China zhejiang Shunpu New Material Technology co. LtdLongyou 324404China co.lege of Chemistry and chemical Engineering Shaanxi University of Science and TechnologyXi’an 710021China National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization Institute of Urban and Rural MiningChangzhou UniversityChangzhou 213164China

MXene-co.tained paper is a good choice to design ultrathin and flexible electromagnetic interference(EMI)shielding ***,the deficiencies in strength and stability of MXene-co.tained paper impede its practical ***,a co.posite paper was proposed to address the problems,in which a filter paper was modified with a three-layer structured surface via a facile layer-by-layer co.ting ***,the TEMPO-oxidized cellulose nanofibers(TOCN)/cationic starch(CS)/MXene gel layer and TOCN/MXene nacre structure layer ensured the good EMI shielding and mechanical performances of the co.posite paper,while the uppermost TOCN/CS hydrogel film layer mainly protected *** co.posite paper achieved an EMI SE of 40.3 dB at a thickness of merely 0.1894 mm(SE/t value of ca.212.8 dB mm^(−1),SSE/t values of ca.13216 dB cm 2 g^(−1))and the total MXene dosage was 20 g m^(−2).Its tensile strength co.ld be up to 11.7 MPa while the original filter paper was 6.4 *** pieces of this co.posite papers co.ld be easily packed together to attain an EMI SE of nearly 70 ***,the hydrogel film layer efficiently protected the MXene and maintained the EMI shielding performance of the co.posite paper when immersed in different liquids including water,HCl(1 M)and ethanol,due to the dense and co.pact structure of hydrogel film *** work provides a practical way to develop ultrathin,flexible and durable EMI shielding materials.

关键词： MXene Electromagnetic interference shielding Nanocellulose Hydrogel

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Polycrystalline ZSM-5 Aggregates Induced by Seed and Catalytic Performance in Methanol to Hydrocarbon

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无机材料学报 2024年第8期39卷 945-954,I0010-I0013页

作者： WANG Xuchang JIAO Chuyu JI Zhuo JIAO Qirui QIN Bo DU Yanze ZHENG Jiajun LI Ruifeng Key Laboratory of co.l Science and Technology MOE Research Centre of Energy Chemical&Catalytic TechnologyTaiyuan University of TechnologyTaiyuan 030024China SINOPEC Dalian Research Institute of Petroleum and Petrochemicals co. Ltd.SINOPECDalian 116045China

Synthesis of ZSM-5 zeolite typically utilizes small molecule polyamines or quaternary ammonium salts as organic structure guiding agent(OSDA).By co.trast,the OSDA-free hydrothermal synthesis system eliminates the use of organic templates and the subsequent calcination *** not only reduces the co.t of synthesis,but also prevents environmental pollution from the co.bustion of organic templates,representing an eco.friendly *** this,literature suggests that even so-called template-free synthesis systems often involve trace amount of organic substances like *** the present work,a calcined co.mercial ZSM-5 zeolite was served as seed,with sodium aluminate as aluminum source and silica sol as silico. source,ensuring an entirely template-free synthesis *** ZSM-5 aggregates co.sisted of rod-like nanocrystals were successfully prepared in the co.pletely OSDA-free *** of the Si/Al ratio in ZSM-5 seed,dosage and crystallization co.ditions such as crystallization temperature and crystallization time on ZSM-5 synthesis were *** results show that a highly crystallinity ZSM-5 aggregate co.sisting of primary nano-sized crystals less than 100 nm is produced from a gel precursor with 5.6%(in mass)seed after hydrothermal treatment for 48 ***,the Si/Al ratio in ZSM-5 seed has little effect on the topological structure and pore structure of the synthesized ***,the seeds with a low Si/Al ratio facilitate faster crystallization of zeolite and enhance the acidity,especially the strong acid centers,of the *** catalytic performance of the synthesized polycrystalline ZSM-5 was evaluated during dehydration of methanol and co.pared with a co.mercial reference *** results exhibit that as co.pared with the reference catalyst,the fabricated sample has a longer catalytic lifetime(16 h vs 8 h)attributed to its hierarchical pores derived from the loosely packed primary ***

关键词： ZSM-5 polycrystalline aggregate crystal seed structure guiding agent

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Generic Interpretable Reaction co.dition Predictions with Open Reaction co.dition Datasets and Unsupervised Learning of Reaction Center

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Research 2024年第2期2023卷 773-794页

作者： Xiaorui Wang Chang-Yu Hsieh Xiaodan Yin Jike Wang Yuquan Li Yafeng Deng Dejun Jiang Zhenxing Wu Hongyan Du Hongming Chen Yun Li Huanxiang Liu Yuwei Wang Pei Luo Tingjun Hou Xiaojun Yao Dr.Neher's Biophysics Laboratory for lnnovative Drug Disco.ery State Key Laboratory of Quality Research in Chinese MedicineMacao Institute for Applied Research in Medicine and HealthMacao University of Science and TechnologyMacao999078China innovation Institute for Artificial Intelligence in Medicine of zhejiang University College of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China Faculty of Applied Sciences Macao Polytechnic UniversityMacao999078China co.lege of Chemistry and chemical Engineering Lanzhou UniversityLanzhou730000China Carbon Silico. AI Technology co. LtdHangzhouZhejiang 310018China Center of Chemistry and chemical Biology Guangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou 510530China co.lege of Pharmacy Shaanxi University of Chinese MedicineXianyangShaanxi712044China

Effective synthesis planning powered by deep learning(DL)can significantly accelerate the disco.ery of new drugs and ***,most DL-assisted synthesis planning methods offer either none or very limited capability to reco.mend suitable reaction co.ditions(RCs)for their reaction ***,the prediction of RCs with a DL framework is hindered by several factors,including:(a)lack of a standardized dataset for benchmarking,(b)lack of a general prediction model with powerful representation,and(c)lack of *** address these issues,we first created 2 standardized RC datasets co.ering a broad range of reaction classes and then proposed a powerful and interpretable Transformer-based RC predictor named *** careful design of the model architecture,pretraining method,and training strategy,Parrot improved the overall top-3 prediction accuracy on catalysis,solvents,and other reagents by as much as 13.44%,co.pared to the best previous model on a newly curated ***,the mean absolute error of the predicted temperatures was reduced by about 4℃.Furthermore,Parrot manifests strong generalization capacity with superior cross-chemical-space prediction *** analysis indicates that Parrot effectively captures crucial chemical information and exhibits a high level of interpretability in the prediction of *** proposed model Parrot exemplifies how modern neural network architecture when appropriately pretrained can be versatile in making reliable,generalizable,and interpretable reco.mendation for RCs even when the underlying training dataset may still be limited in diversity.

关键词： versatile absolute generalization

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Preparation of high-purity fluorite and nanoscale calcium carbonate from low-grade fluorite

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1198-1207页

作者： Qianqian Lu Haisheng Han Wenjuan Sun Xingfei Zhang Weiwei Wang Bilan Zhang Wensheng Chen Qin Zou School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Hunan Nonferrous Chenzhou Fluoride chemical co. Ltd.Chenzhou 423000China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and co.prehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China Hunan Shizhuyuan Nonferrous Metal co. Ltd.Chenzhou 423000China

Flotation separation of calcite from fluorite is a challenge on low-grade fluorite flotation that limits the reco.ery and purity of fluorite co.centrate.A new acid leaching–flotation process for fluorite is proposed in this *** innovative process raised the fluor-ite’s grade to 97.26wt%while producing nanoscale calcium carbonate from its leachate,which co.tained plenty of calcium *** the production of nanoscale calcium carbonate,the impacts of co.centration,temperature,and titration rate were *** modifying the process co.ditions and utilizing crystal co.ditioning agents,calcite-type and amorphous calcium carbonates with co.responding particle sizes of 1.823 and 1.511μm were *** influence of the impurity ions Mn^(2+),Mg^(2+),and Fe^(3+)was demonstrated to reduce the particle size of nanoscale calcium carbonate and make crystal shape easier to manage in the fluorite leach solution system co.pared with the calcium chloride *** co.bination of the acid leaching–flotation process and the nanoscale calcium carbonate preparation method improved the grade of fluorite while reco.ering calcite resources,thus presenting a novel idea for the effective and clean usage of low-quality fluorite resources with embedded microfine particles.

关键词： fluorite calcite nanoscale calcium carbonate waste reco.ery

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Petroleum pitch derived hard carbon via NaCl-template as anode materials with high rate performance for sodium ion battery

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Frontiers of chemical Science and Engineering 2024年第7期18卷 1-10页

作者： Baoyu Wu Hao Sun Xiaoxue Li Yinyi Gao Tianzeng Bao Hongbin Wu Kai Zhu Dianxue Cao Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Hunan Hongshan New Energy Technology co. LtdYiyang 413000China

Sodium-ion batteries(SIBs)have garnered significant interest in energy storage due to their similar working mechanism to lithium ion batteries and abundant reserves of sodium *** facile synthesis of a carbon-based anode materials with capable electrochemical performance is key to promoting the practical application of *** this work,a co.bination of petroleum pitch and recyclable sodium chloride is selected as the carbon source and template to obtain hard carbon(HC)anode for *** times and temperatures are optimized by assessing the sodium ion storage behavior of different HC *** optimized HC exhibits a remarkable capacity of over 430 mAh·g^(-1) after undergoing full activation through 500 cycles at a density of current of 0.1 A·g^(-1).Furthermore,it demonstrates an initial discharge capacity of 276 mAh·g^(-1) at a density of current of 0.5 A·g^(-1).Meanwhile,the optimized HC shows a good capacity retention(170 mAh·g^(-1) after 750 cycles)and a remarkable rate ability(166 mAh·g^(-1) at 2 A·g^(-1)).The enhanced capacity is attributed to the suitable degree of graphitization and surface area,which improve the sodium ion transport and storage.

关键词： petroleum pitch hard carbon sodium-ion batteries high rate recyclable template

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An Improved Thermal co.ductivity Measurement Scheme for Macrosco.ic Graphitic Films Using the Laser Flash Method

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Journal of Thermal Science 2024年第4期33卷 1480-1490页

作者： ZHANG Peijuan MING Xin LIU Yingjun WANG Xuelong SHI Hang HAO Yuanyuan LU Jiahao LIU Zheng LAI Haiwen ZHANG Ying GAO Weiwei XU Zhen GAO Chao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringKey Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceZhejiang UniversityHangzhou310027China Shanxi-Zheda Institute of Advanced Materials and chemical Engineering Taiyuan030032China Special Equipment Safety Supervision and Inspection Institute of Jiangsu Province National Graphene Products Quality Inspection and Testing Center(Jiangsu)Wuxi214174China Hangzhou Gaoxi Technol co. LtdHangzhou311113China China Academy of Aerospace Aerodynamics Beijing100074China

Achieving efficient thermal management urges to exploit high-thermal-co.ductivity materials to satisfy the boosted demand of heat *** is critical to adopt standardized characterization protoco.s to evaluate the intrinsic thermal co.ductivity of thermal management ***,for the most representative laser flash method,the lack of standard measurement methodology and systematic description on the thermal diffusivity and influencing factors has led to significant deviations and co.fusion of the thermal co.duction performance in the emerging thermal management ***,the measurement error factors of thermal diffusivity by the co.mon laser flash analyzer(LFA)are *** high-thermal-co.ductivity graphitic film(GF)as a typical case,the key factors are analyzed to guide the measurement protoco. of related carbon-based thermal management *** basic principle of the LFA measurement,actual pre-processing co.ditions,instrument parameters setting,and data analysis are elaborated for accurate ***,the graphene thick films and co.mon isotropic materials are also extended to meet various thermal measurement *** on the existing practical problems,we propose a feasible test flow to achieve a unified and standardized thermal co.ductivity measurement,which is beneficial to the rapid development of carbon-based thermal management materials.

关键词： thermal management graphitic film laser flash method thermal co.ductivity thermal diffusivity

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