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Synthesis of Three-Dimensional Chiral Covalent Organic Frameworks Using Surfactant as Inducer in Water

Chinese Journal of Chemistry 2024年第23期42卷 3093-3098页

作者： Meiying Huang Zhipeng Zhou Xin Dong Yuyao Li Yonghang Yang Changye Zhan Jiaxing Lu Xiaoshu Wei Yuexian Hong Weiqi Cheng Wei Liu Zhongke Yuan Xudong Chen Zhikun Zheng Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistryand State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen UniversityGuangzhouGuangdong 510275China College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China Department of Stomatology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdong 510275China Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSchool of Materials Science and Engineeringand State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen UniversityGuangzhouGuangdong 510275China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhouGuangdong 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory JieyangGuangdong 522031China

Chiral covalent organic frameworks(COFs)have shown promising applications in asymmetric catalysis,enantiomer separation and chiral recognition due to their tunable structures and permanent ***,synthesis of chiral COFs mainly relies on direct-synthesis method which requires asymmetric monomers to polymerize and crystallize with symmetric monomers and post-synthesis method which has been greatly limited to having complete reactions with the micro-/meso-sized pores of ***,the synthesis of two-dimensional COFs by covalent replacement of chiral competitor has been ***,we present the synthesis of three types of 3D COFs with tunable chirality using chiral amino acid derivative surfactant as inducer in water under ambient *** hydrogen bonds and electrostatic interactions between amino acid derivative surfactant and monomers as well as their precursors facilitate the transfer of the chirality.

关键词： Covalent organic frameworks Chirality Surfactants Amino acid derivatives Aqueous-phase synthesis Noncovalent interactions

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Diameter-dependent photoelectric performances of semiconducting carbon nanotubes/perovskite heterojunctions

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Nano Research 2023年第11期16卷 12662-12669页

作者： Yayang Yu Wenke Wang Xiao Li Linhai Li Shilong Li Xiaojun Wei Weiya Zhou Jing Lin Yang Huang Huaping Liu School of Materials Science and Engineering Hebei Key Laboratory of Boron Nitride Micro and Nano MaterialsHebei University of TechnologyTianjin 300130China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The heterojunction of single-wall carbon nanotubes(SWCNTs)and perovskite quantum dots(QDs)shows excellent photodetection performances due to the combination of the advantages of high carrier mobility of SWCNTs and high absorption coefficient of perovskite ***,the band structure of a SWCNT is determined by its atomic arrangement *** the structure of SWCNTs affects the photoelectric performance of the composite film remains ***,we systematically explored the diameter effect of SWCNTs with different bandgaps on the photodetection performances of SWCNTs/perovskite QDs heterojunction films by integrating semiconducting SWCNTs(s-SWCNTs)with different diameters with CsPbBr3 *** results show that with an increase in diameter of s-SWCNTs,the heterojunction exhibits increasing responsivity(R),detectivity(D*),and faster response *** great improvement in the optoelectronic performances of devices should be attributed to the higher carrier mobility of larger-diameter SWCNT films and the increasing built-in electric field at the heterojunction interfaces between larger-diameter SWCNTs and CsPbBr3 QDs,which enhances the separation of the photogenerated excitons and the transport of the resulted carriers in SWCNT films.

关键词： carbon nanotubes perovskite quantum dots diameter effect responsivity detectivity

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Textured Asymmetric Membrane Electrode Assemblies of Piezoelectric Phosphorene and Ti_(3)C_(2)T_(x)MXene Heterostructures for Enhanced Electrochemical Stability and Kinetics in LIBs

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Nano-Micro Letters 2024年第4期16卷 394-414页

作者： Yihui Li Juan Xie Ruofei Wang Shugang Min Zewen Xu Yangjian Ding Pengcheng Su Xingmin Zhang Liyu Wei Jing‑Feng Li Zhaoqiang Chu Jingyu Sun Cheng Huang Volta and DiPole Materials Labs College of EnergySoochow Institute for Energy and Materials InnovationS(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceKey Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical IndustrySoochow UniversitySuzhou 215006People’s Republic of China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204People’s Republic of China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China High Density Materials Technology Center for Flexible Hybrid Electronics Suzhou Institute of Electronic Functional Materials TechnologySuzhou Industrial Technology Research InstituteSuzhou 215151People’s Republic of China Institute of Advanced Materials and Institute of Membrane Science and Technology Jiangsu National Synergistic Innovation Center for Advanced MaterialsSuzhou Laboratory and Nanjing Tech UniversityNanjing 211816People’s Republic of China

Black phosphorus with a superior theoretical capacity(2596 mAh g^(-1))and high conductivity is regarded as one of the powerful candidates for lithium-ion battery(LIB)anode materials,whereas the severe volume expansion and sluggish kinetics still impede its applications in *** contrast,the exfoliated two-dimensional phosphorene owns negligible volume variation,and its intrinsic piezoelectricity is considered to be beneficial to the Li-ion transfer kinetics,while its positive influence has not been discussed ***,a phosphorene/MXene heterostructure-textured nanopiezocomposite is proposed with even phosphorene distribution and enhanced piezo-electrochemical coupling as an applicable free-standing asymmetric membrane electrode beyond the skin effect for enhanced Li-ion *** experimental and simulation analysis reveals that the embedded phosphorene nanosheets not only provide abundant active sites for Li-ions,but also endow the nanocomposite with favorable piezoelectricity,thus promoting the Li-ion transfer kinetics by generating the piezoelectric field serving as an extra *** waltzing with the MXene framework,the optimized electrode exhibits enhanced kinetics and stability,achieving stable cycling performances for 1,000 cycles at 2 A g^(-1),and delivering a high reversible capacity of 524 m Ah g^(-1)at-20℃,indicating the positive influence of the structural merits of self-assembled nanopiezocomposites on promoting stability and kinetics.

关键词： Phosphorene Nanopiezocomposite Piezo-electrochemical coupling Membrane electrode assembly Lithium-ion storage

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Synergetic enhancement of selectivity for electroreduction of CO_(2)to C_(2)H_(4)by crystal facet engineering and tandem catalysis over silver-incorporated-cuprous oxides

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materials Reports(Energy) 2023年第2期3卷 164-172,I0004页

作者： Gang Dong Chuang Xue Meng Li Tiantian Zhang Dongsheng Geng Li-Min Liu Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083PR China School of Physics Beihang UniversityBeijing100083PR China

Electrochemical CO_(2)reduction to C_(2)H_(4)can provide a sustainable route to reduce globally accelerating CO_(2)emissions and produce energy-rich chemical ***,the poor selectivity in C_(2)H_(4)electrosynthesis limits its implementation in industrially interesting ***,we report a composite structured catalyst composed of Ag and Cu_(2)O with different crystal faces to achieve highly efficient reduction of CO_(2)to C_(2)H_(4).The catalyst composed of Ag and octahedral Cu_(2)O enclosed with(111)facet exhibits the best CO_(2)electroreduction performance,with the Faradaic efficiency(FE)and partial current density reaching 66.8%and 17.8 mA cm2 for C_(2)H_(4)product at-1.2 VRHE in 0.5 M KHCO_(3),*** characterization and electrochemical test analysis indicate that the high selectivity for C_(2)H_(4)product stems from the synergistic effect of crystal faces control engineering and tandem ***,Ag can provide optimal availability of CO intermediate by suppressing hydrogen evolution;subsequently,C-C coupling is promoted on the intimate surface of Cu_(2)O with facetdependent *** insights gained from this work may be beneficial for designing efficient multicomponent catalysts for improving the selectivity of electrochemical CO_(2)reduction reaction to generate C2þproducts.

关键词： Cu_(2)O/Ag tandem catalysts Facet-dependent selectivity CO_(2)reduction reaction C_(2)H_(4) Electrocatalysis Synergistic effect

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Simultaneously optimizing pore morphology and enhancing mechanical properties of Al-Si alloy composite foams by graphene nanosheets

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Journal of materials science & technology 2022年第6期101卷 60-70页

作者： Weiting Li Xudong Yang Kunming Yang Chunnian He Junwei Sha Chunsheng Shi Yunhui Mei Jiajun Li Naiqin Zhao Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Sino-European Institute of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China Collaborative Innovation Center of Chemical Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

The integrity and regularity of pore morphology play an important role in determining the mechanical properties of the metallic foam *** conventional methods on refining pore morphology are mainly focused on the optimization of fabrication techniques,however,they are usually inconvenient and ***,incorporating nano reinforcement is considered to be a suitable way to fabricate metallic composite foams accompanied by optimized pore morphology and enhanced mechanical *** this work,through a facile and rapid powder metallurgy foaming method,the aluminum-silicon(Al-Si)alloy composite foams reinforced by graphene nanosheets(GNSs)are successfully *** microstructure analyses reveal that,for the Al-Si alloy foams incorporating the GNSs(GNSs/Al-Si composite foams),the pore size is transformed to be smaller,the pore size distributions become more homogeneous and the pore shape is also refined to a regular and roundish ***,the shape of Si precipitates is found transforming from an irregular long strip(length of~20μm,width of~5μm)to a fine particle state(diameter of~5μm).Moreover,the compressive testing results show that,the 0.4wt%GNSs/Al-Si composite foams own the optimal compression stress of 11.7±0.5 MPa,plateau stress of 10.0±1.0 MPa and energy absorption capacity of 6.8±0.7 MJ/m^(3),which have improvement of 58.1%,53.8%and 51.1%in comparison with the Al-Si alloy foams counterpart,*** present findings may pave a new way for developing new generation of metallic composite foams that with stable microstructure and excellent mechanical performance.

关键词： Metal matrix composites Aluminum foam Graphene Energy absorption

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Modulation of the octahedral structure and potential superconductivity of La_(3)Ni_(2)O_(7)through strain engineering

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science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 145-152页

作者： Zihao Huo Zhihui Luo Peng Zhang Aiqin Yang Zhengtao Liu Xiangru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenxuan Chen Dao-Xin Yao Defang Duan Tian Cui Key Laboratory of Material Simulation Methods&Software of Ministry of Education State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of PhysicsSun Yat-sen UniversityGuangzhou510275China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an710049China Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo315211China

The recent transport measurements of La_(3)Ni_(2)O_(7)uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature(P-T)phase *** by this,we perform theoretical first-principles studies of La_(3)Ni_(2)O_(7)with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d_(z^(2))electron density at the Fermi energy(n_(z)^(E_(F)))that highly coincides with such *** this basis,we further explore the electronic structure under uniaxial *** tracking the stress response of n_(z)^(E_(F)),we propose that superconductivity can be achieved by applying only ~2GPa of compression along the c *** idea is further exemplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nz E Fand the superconducting T_(c)in La_(3)Ni_(2)O_(7)*** study provides new routes to the search of high-T_(c)superconductors in future experiments.

关键词： nickelate superconductors density functional theory strong correlated systems strain engineering

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Engineering active sites of cathodic materials for high-performance Zn-nitrogen batteries

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Nano Research 2023年第7期16卷 9214-9230页

作者： Shanshan Chen Kang Lian Wenxian Liu Qian Liu Gaocan Qi Jun Luo Xijun Liu Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Institute for Advanced Study Chengdu UniversityChengdu 610106China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

As an ideal carbon-free energy carrier,ammonia plays an indispensable role in modern *** conventional industrial synthesis of NH3 by the Haber-Bosch technique under harsh reaction conditions results in serious energy consumption and environmental ***,it is essential to develop NH3 synthesis tactics under benign *** synthesis of NH_(3) has the advantages of mild reaction conditions and environmental friendliness,and has become a hotspot for research in recent *** has been reported that zinc-nitrogen batteries(ZNBs),such as Zn-N_(2),Zn-NO,Zn-NO_(3)^(-),and Zn-NO_(2)^(-)batteries,can not only reduce nitrogenous species to ammonia but also have concomitant power ***,the common drawbacks of these battery systems are unsatisfactory power density and ammonia *** this review,the latest progress of ZNBs including the reaction mechanism of the battery and reactor design principles is systematically ***,active site engineering of cathode catalysts is discussed,including vacancy defects,chemical doping,and heterostructure ***,some insights are provided to improve the performance of ZNBs from a practical perspective of view.

关键词： Zn-nitrogen batteries nitrogen reduction electrocatalysis ammonia synthesis aqueous battery

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Electrically conductive and highly compressible anisotropic MXene-wood sponges for multifunctional and integrated wearable devices

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Journal of materials science & technology 2023年第13期144卷 102-110页

作者： Dekui Song Mei-Jiao Zeng Peng Min Xue-Qin Jia Fu-Lin Gao Zhong-Zhen Yu Xiaofeng Li State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China College of Chemistry Beijing Normal UniversityBeijing100875China

Although piezoresistive sensors have wide applications in human motion detection and wearable elec-tronics,it is still a challenge to produce multifunctional and integrated sensors with wide working ranges and linear sensing ***,electrically conductive,highly compressible,and structurally anisotropic MXene-wood(MW)sponges are fabricated by converting balsa wood blocks to compressible wood sponges with extremely low density and highly anisotropic porous structure,followed by deco-rating with conductive MXene *** MW sponge is utilized to assemble a piezoresistive sensor with a large working range of 0-25 kPa,wide linear sensing ranges of 5%-50%and 0-180°,and excellent long-term reliability under a bending angle of 30°for 5000 ***,the sensor is suitable for monitoring practical human physiological signals including pulse beating,and finger and wrist *** all-MW sponge-based multifunctional and integrated sensing system is constructed by integrating the MW sponge piezoresistive sensor,the MW sponge-based solid-state supercapacitor,and the MW sponge electrophysiological *** sensing system can concurrently detect surface electromyogram and tactile pressures,and hence realize real-time closed-loop *** multifunctional and integrated MW sponge sensing system would have great potentials in real-time pressure recognition and human-machine interfaces.

关键词： MXene sheets Wood sponges Piezoresistive sensors Compressibility

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Modulating surface oxygen species via facet engineering for efficient conversion of nitrate to ammonia

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Journal of Energy Chemistry 2023年第3期78卷 211-221,I0007页

作者： Wenye Zhong Zhiheng Gong Zuyun He Nian Zhang Xiongwu Kang Xianwen Mao Yan Chen School of Environment and Energy State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou 510006GuangdongChina State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Department of Materials Science and Engineering National University of SingaporeSingapore 119077Singapore Institute of Functional Intelligent Materials National University of SingaporeSingapore 119077Singapore Centre for Advanced 2D Materials National University of SingaporeSingapore 119077Singapore

Electrochemical reduction of nitrate,a common pollutant in aquatic environment,to valuable ammonia(NO3-RR) using renewably-sourced electricity has attracted widespread interests,with past efforts mainly focused on designing electrocatalysts with high activity and *** detailed correlation between catalyst properties and NO3-RR kinetics,nevertheless,is still not fully *** this work,we modulate the surface oxygen species of Cu_(2)O via facet engineering,and systematically study the impact of these oxygen species on the NO_(3)^(-)RR *** advanced spectroscopic techniques,densi ty fu n ctional theory calculations and molecular dynamics simulations,we find that while oxygen vacancies on Cu_(2)O(111) surface promote the adsorption of reactants and reaction intermediates,hydroxyl groups effectively inhibit the side reaction of hydrogen evolution and facilitate the hydrogenation process of *** two effects work in concert to render Cu_(2)O(111) facet the highest NO3-RR activity relative to those from other *** study provides critical insights into the synergistic effect of exposed facets and surface oxygen species on heterogeneous catalysis,and offers a generalizable,facet engineeringbased strategy for improving the performance of a variety of electrocatalysts important for renewable energy conversion.

关键词： Facet engineering Oxygen vacancy Hydroxyl group Electrochemical nitrate reduction Ammonia

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Layered niobium carbide enabling excellent kinetics and cycling stability of Li-Mg-B-H hydrogen storage material Layered niobium carbide enabling excellent kinetics

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Rare Metals 2024年第3期43卷 1153-1166页

作者： Li-Wen Lu Hui Luo Guang-Xu Li Yun Li Xin-Hua Wang Cun-Ke Huang Zhi-QiangLan Wen-Zheng Zhou Jin Guo Mohammad Ismail Hai-Zhen Liu Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems IntegrationSchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning530004China School of Mechanical and Electrical Engineering Quzhou College of TechnologyQuzhou324000China Department of Materials Science and Engineering Zhejiang UniversityHangzhou310027China Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu21030Kuala NerusTerengganuMalaysia Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China

The Li-Mg-B-H composite(2LiBH_(4)+MgH_(2))has a high capacity of 11.4 wt%as a hydrogen storage ***,the slow kinetics and poor cycling stability severely restrict its practical *** this work,a layered Nb_(2)C MXene was first synthesized and then introduced to tailor the kinetics and cycling stability of the Li-Mg-B-H *** milled 2LiH+MgB_(2)composites were initially hydrogenated to obtain the 2LiBH_(4)+MgH_(2)*** 2LiBH_(4)+MgH_(2)+5wt%Nb_(2)C can release 9.0 wt%H_(2)in 30 min at 400℃,while it is only 2.7 wt%for the undoped 2LiBH_(4)+MgH_(2).The dehydrogenation activation energies of MgH_(2)and LiBH_(4)are 123 and 154 kJ·mol^(-1)respectively for the 5 wt%Nb_(2)C-doped composite,lower than the undoped composite(164 and 165 kJ·mol^(-1)).The 2LiBH_(4)+MgH_(2)+5 wt%Nb_(2)C possesses excellent cycling stability,with the reversible capacity only slightly reduced from 9.4 wt%for the 1st cycle to 9.3 wt%for the 20th ***_(2)C keeps stable in the composite and acts as an efficient catalyst for the Li-Mg-B-H *** is believed that both the layered structure and the active Nb element contribu te to the enhanced hydrogen storage performances of the Li-Mg-B-H *** work confirms that the Nb_(2)C MXene with layered stru cture has a significant enhancing impact on the Li-Mg-B-H hydrogen storage materials,which is different from the bulk NbC.

关键词： Hydrogen storage Lithium borohydride Magnesium hydride Nb_(2)C MXene

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