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Carbon dots modified nanoflower petals with super enhanced nitrogen electro-reduction efficiency

Chinese Chemical Letters 2023年第6期34卷 406-411页

作者： Yang Zhou Xuanzhao Lu Yu-chung Chang Yanwen Ma Linlin Wang Jianrong Zhang Junjie Zhu State Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials IAM Nanjing University of Posts&TelecommunicationsNanjing 210023China State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Mechanical and Materials Engineering Washington State UniversityPullmanWA 99164United States

Nitrogen electro-reduction reaction(NERR)is a promising alternative method for ammonia production to the Haber-Bosch approach due to mild reaction conditions and free harmful by-product emission.A formidable challenge in bringing NERR closer to the practical application is developing an electrocatalyst which can simultaneously improve the Faraday efficiency and reduce the reaction ***,we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals(Cu Po-NCDs NF)via a self-assembly *** flower structure endowed the Cu Po-NCDs NF with large specific surface area,and thus enabled more active sites to be *** particular,we demonstrated that the NCDs modified Cu Po petals with flower-like structure can accelerate the interfacial proton-electron transfer,suppressing the competing hydrogen evolution reaction and promoting the desired NERR ***,for the CuPo-NCDs NF catalyzed NERR,the FE_(NH_(3))and the reaction potential both were boosted,the resultant energy efficiency of NERR reached a record-breaking value of 56.5%,and the NH_(3)yield rate increased by 7 times compared to *** study provides a novel catalyst with a new pathway to boost the NERR.

关键词： Nitrogen-doped carbon dots Nano-flower Self-assembly Interfacial proton-electron transfer Nitrogen electro-reduction

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Rational design of biodegradable semiconducting polymer nanoparticles for NIR-II fluorescence imaging-guided photodynamic therapy

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Nano research 2024年第6期17卷 5399-5408页

作者： Xuxuan Gu Jinlong Shen Zhiwei Xu Wenqi Wang Ying Wu Wen Zhou Chen Xie Quli Fan State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China

Semiconducting polymer nanoparticles(SPNs)have shown great promise in second near-infrared window(NIR-II)***,the issue of long metabolic time significantly restricts the clinical application of *** this study,we rationally designed a biodegradable SPN(BSPN50)for NIR-II fluorescence imaging-guided photodynamic therapy(PDT).BSPN50 is prepared by encapsulating a biodegradable SP(BSP50)with an amphiphilic copolymer ***50 is composed of NIR-II fluorescent diketopyrrolopyrrole(DPP)segment and degradable poly(phenylenevinylene)(PPV)segment with the ratio of 50/***50 has both satisfactory degradability under myeloperoxidase(MPO)/hydrogen peroxide(H_(2)O_(2))and NIR-II fluorescence emission upon 808 nm laser ***,BSPN50 shows good photodynamic efficacy under 808 nm laser ***50 shows a faster degradation rate than BSPN100 which has no PPV segment both in vitro and in *** addition,BSPN50 can effectively diagnose tumor via NIR-II fluorescence imaging and inhibit the tumor growth by ***,our study provides a rational approach to construct biodegradable nanoplatforms for efficient tumor NIR-II phototheranostics.

关键词： near-infrared(NIR)-II fluorescence imaging semiconducting polymer nanoparticles photodynamic therapy tumor imaging

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Van der Waals layered ferroelectric CuInP2S6: Physical properties and device applications

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Frontiers of Physics 2021年第1期16卷 62-91页

作者： Shuang Zhou Lu You Hailin Zhou Yong Pu Zhigang Gui Junling Wang New Energy Technology Engineering Laboratory of Jiangsu Province & School of Science Nanjing University of Posts and Telecommunications Jiangsu Key Laboratory of Thin Films School of Physical Science and Technology Soochow University Department of Physics Southern University of Science & Technology

Copper indium thiophosphate, CuInP2S6, has attracted much attention in recent years due to its van der Waals layered structure and robust ferroelectricity at room temperature. In this review, we aim to give an overview of the various properties of CuInP2S6, covering structural, ferroelectric, dielectric,piezoelectric and transport properties, as well as its potential applications. We also highlight the remaining questions and possible research directions related to this fascinating material and other compounds of the same family.

关键词： CuInP2S6\n van der Waals ferroelectric phase transition ionic conduction piezoelectricity

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Flat Zn deposition at battery anode via an ultrathin robust interlayer

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Nano research 2024年第9期17卷 8104-8111页

作者： Yizhou Wang Jianyu Chen Zibo Chen Qian He Zhengnan Tian Jin Zhao Yanwen Ma Husam N.Alshareef Materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia State Key Laboratory of Organic Electronics and Information Displays(KLOEID)and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Suzhou Vocational Institute of Industrial Technology Suzhou 215104China

Rechargeable aqueous zinc(Zn)ion batteries(AZIBs)using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems,but the Zn dendrite problem severely hinders the further prospects of *** Zn depositing behaviors toward horizontal alignment is highly effective and thus has received huge ***,such a strategy is usually based on previous substrate engineering,which requires complex preparation or expensive ***,it is essential to develop a novel solution that can realize horizontally aligned Zn flake deposition via easy operation and low ***,we report an ultrathin and robust Kevlar membrane as the interlayer to mechanically suppress Zn dendrite *** to the randomly distributed flaky dendrites in the control group,the deposited Zn sheets would grow into parallel alignment with the existence of such *** the dendrites are effectively suppressed,Zn||Cu asymmetric,Zn||Zn symmetric,and Zn||MnO_(2)full batteries using Kevlar interlayer deliver significantly improved cycling ***,the Zn||MnO_(2)pouch cell using a Kevlar interlayer delivers stable cycling performance and shows stable operation during multi-angle *** believe this work provides a new possibility for regulating Zn deposition from a crystallographic perspective.

关键词： Zn metal anodes Zn dendrites aqueous Zn ion batteries dendrite suppression (002)crystal plane

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Lithiophilic hyperbranched Cu nanostructure for stable Li metal anodes

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SmartMat 2023年第3期4卷 96-107页

作者： Jianyu Chen Xin Qiao Wei Fu Xuran Han Qiang Wu Yizhou Wang Yu Zhang Li Shi Jin Zhao Yanwen Ma State Key Laboratory for Organic Electronics and Information Displays(KLOEID)&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjingChina Materials Science and Engineering King Abdullah University of Science and Technology(KAUST)ThuwalSaudi Arabia New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&TelecommunicationsNanjingChina Suzhou Vocational Institute of Industrial Technology SuzhouChina

Porous copper(Cu)current collectors are regarded as a promising host for stabilizing lithium(Li)metal anodes but suffer from uncontrollable Li metal deposition due to the intrinsic lithiophobic nature of *** study proposes a vertically aligned Cu host with hyperbranched CuxO nanostructure to provide lithiophilic nucleation sites for homogeneous Li metal ***,the vertically aligned Cu nanostructure dramatically reduces the local current density and brings homogeneous Li‐ion *** lithiophilic hyperbranched CuxO nanostructure with a low nucleation barrier could induce homogeneous Li nucleation and *** a result,the Cu@CuxO nanostructured host exhibits a low nucleation overpotential of 44.3 mV and achieves highly electrochemical reversibility with high Coulombic efficiency of 98.33%in a half‐*** Cu@CuxO nanostructured electrode is capable of working under different current densities varying from 0.5 to 5 mA/cm2 in a symmetric *** assembled full cell coupling of the Li/Cu@CuxO composite anode with the LiFePO4 cathode manifests stable long‐term cycling life at 1 *** study elaborates on the synergistic effect of electrode structure design and interfacial chemistry modification to regulate the Li deposition/dissolution behavior,thus exhibiting remarkable electrochemical performances for next‐generation Li‐metal batteries.

关键词： current collector Li metal anode lithiophilicity low nucleation overpotential vertically aligned structure

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