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Nano Materials science 2024年

作者： Zhang, Xiaochuan Sun, Shaodong Wang, Haotian Lyu, Jieli Yu, Xiaojing Yang, Bian Yang, Man Duan, Zongfan Yang, Qing Cui, Jie Engineering Research Center of Conducting Materials and Composite Technology Ministry of Education Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology School of Materials Science and Engineering Xi'an University of Technology Xi'an710048 China

Simultaneous integration of rich oxygen vacancies (OVs) and twin crystals in a photocatalyst can not only significantly enhance the near-infrared (NIR) light response but also greatly improve the photocharge separation and transfer efficiency owing to the induced high electrical conductivity and strong built-in electric field. However, thus far, there has been a lack of a model catalyst containing both twin crystals and OVs. Herein, we develop a simple wet chemical strategy for synthesizing of unprecedented NIR light-responsive OVs-rich Cu2O black nanoparticles with high-density of twin crystals (denoted as black twinned Cu2O). As expected, the black twinned Cu2O exhibits higher visible-NIR and NIR light-driven photodegradation of tetracycline (TC) solution than the counterparts. Significantly, the mechanism insight into twin-dependent photocatalysis in NIR light-responsive Cu2O black nanocrystals with rich OVs is uncovered in depth by density functional theory (DFT) calculations and a series of experimental evidence. Expectantly, this work would be beneficial for the scientific researchers currently focusing on the NIR light-responsive photocatalysis and twin engineering of photocatalysts. © 2024 Chongqing University

关键词： Oxygen vacancies

Ni/Ni4n Nanoparticles Anchored on 3d Necklace-Like Carbon Framework as Free-Standing Bifunctional Host for Practical Li-S Full Cells

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SSRN 2024年

作者： Guo, Zichen Li, Yinuo Tian, Yuan Wang, Cheng Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Laboratory of Advanced Functional Porous Materials School of Materials Science and Engineering Tianjin University of Technology Tianjin300384 China

Inhibiting the shuttle effect, accelerating sulfur redox kinetics and controlling lithium homogeneous deposition are significant to achieve the flexible lithium-sulfur (Li-S) cells with high energy density and safety. In this study, we successfully synthesized a three-dimensional (3D) free-standing necklace-like fabric consisting of heterostructured Ni/Ni4N nanoparticles confined into hollow carbon cages implanted with N-doped carbon nanofibers (Ni/Ni4N@NCC). This unique 3D necklace-like framework and interface electronic structure of Ni/Ni4N@NCC could effectively addresses the challenges associated with both sulfur cathode and lithium anode in Li-S cells. Combine with experimental tests and DFT simulations, Ni/Ni4N@NCC not only strengthened chemical anchoring and accelerated lithium polysulfides conversion, but also induced Li uniform deposition and growth due to its excellent lithiophilicity and low Li diffusion energy barrier. For the anode, the lithium foil coating with Ni/Ni4N@NCC interlayer (denoted as Li-Ni/Ni4N@NCC anode) showed exceptional long-term cycling stability over 1000 h at the high current density of 5mA cm-2 for high areal capacity of 5 mAh cm-2. The S-Ni/Ni4N@NCC||Li-Ni/Ni4N@NCC cell with sulfur loading (6.8 mg cm−2) exhibited high areal capacities of 6.11 mAh cm-2. The synergetic effect of fascinating necklace-like structure and heterogeneous interface offer instruction for the practically viable design of high-performance flexible Li-S full cells. © 2024, The Authors. All rights reserved.

关键词： Cells

Preparation of Alum-borneol-PVP Drug-loaded Fibers by Electrospinning

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Chemical Research in Chinese Universities 2021年第3期37卷 411-418页

作者： HUANG Libing LIU Yueqi SANG Xinyu SONG Jinghui HU Ping LIU Yong College of Mechanical and Electric Engineering Beijing University of Chemical TechnologyBeijing100029P.R.China Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

The alum-borneol nanoemulsion(ABN),which combines the mineral medicine alum and the botanical medicine borneol,has been applied for approximately 40 years in the clinical treatment of burns,scalds,radiation dermatitis and shingles,and has a good curative ***,the current formula and dosage form of ABN pose problems of low borneol content and ease of precipitation,which greatly affects the efficacy of the *** this study,polyvinylpyrrolidone(PVP)was selected as a carrier mixed with different proportions of alum and borneol to produce alum-borneol-PVP fibers(ABPF)by *** results showed that the stable system with good drug dispersion was 2:3(alum:borneol).The dissolution content of borneol from the ABPF was about 80%in 4 h,which was much higher than that of the alum-borneol liquid(ABL)and *** ABPF membrane showed a more significant inhibitory effect on Staphylococcus aureus than the ABL and *** composite fiber markedly increased the drug content of borneol,which was 800 times of that in *** fiber had a higher solubility than the nanoemulsion in vitro,which is of great importance for the development of new forms for the clinical application of alum and borneol.

关键词： Drug delivery Dissolution content Bioavailability Antibacterial Fiber membrane

Natural Graphene Plasmonic Nano-Resonators for Highly Active Surface-Enhanced Raman Scattering Platforms

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Energy & Environmental Materials 2023年第5期6卷 269-280页

作者： Xiaoqiang Feng Zhiduo Liu Guanglin Zhang Shan Zhang Shuiping Huang Zhengyi He Genwang Wei Siwei Yang Yangguang Zhu Caichao Ye Cheng-Te Lin Guqiao Ding Gang Wang Department of Microelectronic Science and Engineering School of Physical Science andNingbo UniversityNingbo 315211China State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Academy for Advanced Interdisciplinary Studies&Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

Highly sensitive and uniform three-dimensional(3D)hybrid heterogeneous structures for use in surface-enhanced Raman scattering(SERS)experiments were fabricated by sequentially decorating high-quality,ultra-clean,graphene quantum dots(GQDs)and Ag nanoparticles(Ag-NPs)onto ***-difference time-domain calculations and scanning Kelvin probe microscopy were used to verify that the Ag-NPs/GQDs/3D-graphene system facilitates substantial electromagnetic enhancement(due to the occurrence of two kinds of"gaps"between the Ag-NPs that form 3D"hot spots")and additional chemical enhancement(in detecting someπ-conjugated molecules).The SERS mechanism was explored in further detail via experimental analysis and confirmed by performing theoretical *** large surface area of the 3D substrate(due to the large specific surface areas of the GQDs and 3D-graphene)results in a better enrichment effect which helps produce lower detection *** particular,the detection limits obtained using the Ag-NPs/GQDs/3D-graphene platform can reach 10^(-11)M for rhodamine 6G,10^(-10)M for methylene blue and dopamine,and 10^(-7)M for tetramethylthiuram disulfide and methyl parathion in apple juice(these are superior to most of the results reported using graphene-based SERS substrates).In summary,the 3D-platform Ag-NPs/GQDs/3D-graphene/Si shows outstanding SERS *** therefore has excellent application prospects in biochemical molecular detection and food safety monitoring.

关键词： Ag-NPs/GQDs/3D-graphene chemical enhancement dopamine Electromagnetic enhancement

Construction of Pi-Mxene-Mwcnt Nanocomposite Film Integrating Conductive Gradient with Sandwich Structure for High-Efficiency Electromagnetic Interference Shielding in Extreme Environments

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SSRN 2024年

作者： Liang, Wenhao Wu, Juntao Zhang, Shan Zhao, Pei-Yan Zuo, Xiaobiao Wang, Guang-Sheng Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University Beijing100191 China National Engineering Research Center of Functional Carbon Composite Aerospace Research Institute of Materials & Processing Technology Beijing100076 China

Modern electronic equipment puts forward stricter requirements for the performance of electromagnetic interference (EMI) shielding materials to cope with the increasingly complex electromagnetic environment. Here, a high-performance polyimide-MXene-multi-wall carbon nanotubes (PI-MXene-MWCNT) nanocomposite films were prepared by a highly controllable electrospinning-spraying process using the design strategy of integrating conductive gradient with the sandwich structure. The top layer and bottom layer of the composite film are PI electrospun fiber films, and the middle layer is composed by MXene and MWCNT. The design strategy of the conductive gradient structure significantly enhances the EMI shielding performance without increasing the filler content, as evidenced by the nanocomposite film's high EMI shielding effectiveness of 66.8 dB and a satisfactory absolute shielding efficiency of 13153.8 dB·cm2·g-1. The design strategy of PI sandwich structure endows the nanocomposite film with excellent comprehensive performance. The nanocomposite film can not only maintain efficient EMI shielding performance in various extreme conditions, but also has excellent thermal insulation performance (30.5 mW/(m·K)) and flame retardation performance. Meanwhile, the nanocomposite film exhibits good mechanical properties and flexibility, as evidenced by an elongation at break of up to 35.4%. This work provides inspiration for the preparation of a high-performance EMI shielding material that can be used in extreme environments, which has broad application potential in the field of EMI shielding. © 2024, The Authors. All rights reserved.

关键词： Nanocomposite films

Emerging material platforms for integrated microcavity photonics

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science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 10-28页

作者： Jin Liu Fang Bo Lin Chang Chun-Hua Dong Xin Ou Blake Regan Xiaoqin Shen Qinghai Song Baicheng Yao Wenfu Zhang Chang-Ling Zou Yun-Feng Xiao State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510000China MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Institute of Applied Physics and School of PhysicsNankai UniversityTianjin 300071China State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China CAS Key Lab of Quantum Information University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Functional Material for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Mathematical and Physical Sciences University of Technology SydneyUltimo 2007Australia School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Harbin Institute of TechnologyShenzhen 518055China Key Laboratory of Optical Fiber Sensing and Communications(Ministry of Education) University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China

Many breakthroughs in technologies are closely associated with the deep understanding and development of new material *** the main material used in microelectronics,Si also plays a leading role in the development of integrated *** indirect bandgap,absence ofχ(2)nonlinearity and the parasitic nonlinear absorptions at the telecom band of Si imposed technological bottlenecks for further improving the performances and expanding the functionalities of Si microcavities in which the circulating light intensity is dramatically *** past two decades have witnessed the burgeoning of the novel material platforms that are compatible with the complementary metal-oxide-semiconductor(COMS)*** particular,the unprecedented optical properties of the emerging materials in the thin film form have resulted in revolutionary progress in microcavity *** this review article,we summarize the recently developed material platforms for integrated photonics with the focus on chip-scale microcavity *** material characteristics,fabrication processes and device applications have been thoroughly discussed for the most widely used new material *** also discuss open challenges and opportunities in microcavity photonics,such as heterogeneous integrated devices,and provide an outlook for the future development of integrated microcavities.

关键词： microcavity integrated optics nonlinear optics

Bio-organic adaptive photonic crystals enable supramolecular solvatochromism

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Nano Research 2023年第10期16卷 12092-12097页

作者： Jiahao Zhang Yan Zhang Yancheng Wang Sigal Rencus-Lazar Deqing Mei Ehud Gazit Kai Tao State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials Hangzhou Global Scientific and Technological Innovation CentreZhejiang UniversityHangzhou 311200China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China The Shmunis School of Biomedicine and Cancer Research George S.Wise Faculty of Life SciencesTel Aviv UniversityTel Aviv 6997801Israel Department of Materials Science and Engineering Iby and Aladar Fleischman Faculty of EngineeringTel Aviv UniversityTel Aviv 6997801Israel

Photonic crystals(PCs)exhibit promising structural coloration properties and possess extensive application prospects in diverse optical ***,state-of-the-art inorganic or polymeric PCs show limited adaptivity as their configurations are fixed once ***,bio-organic adaptive PCs are fabricated via drop-casting of amphiphilic guanine-based peptide nucleic acid selfassembled *** high formation activation energy of up to 81.8 kJ·mol−1 suggests that the self-assembly step dominates the entire ***,the configurations along with the structural coloration of the supramolecular PCs are sensitive to self-assembly influencing parameters,showing temperature-encoded structural color evolution and solvent polaritydependent *** findings demonstrate that the supramolecular PCs are adaptive,thus showing promising potential for detection of organic solvents of different polarities in a visual and real-time manner for environmental protection or optical applications.

关键词： peptide nucleic acids molecular manufacturing supramolecular photonic crystals solvatochromic effects adaptivity

Construction of Pi-Mxene-Mwcnt Nanocomposite Film Integrating Conductive Gradient with Sandwich Structure for High-Efficiency Electromagnetic Interference Shielding in Extreme Environments

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SSRN 2024年

作者： Liang, Wenhao Wu, Juntao Zhang, Shan Zhao, Pei-Yan Zuo, Xiaobiao Wang, Guang-Sheng Key Laboratory of Bioinspired Smart Interfacial Science and Technology Ministry of Education School of Chemistry Beihang University Beijing100191 China National Engineering Research Center of Functional Carbon Composite Aerospace Research Institute of Materials & Processing Technology Beijing100076 China

关键词： Nanocomposite films

Electrolyte and Interphase Engineering Through Solvation Structure Regulation for Stable Lithium Metal Batteries

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SSRN 2023年

作者： Su, Hai Zhang, Haikuo Chen, Zifeng Li, Mengjie Zhao, Jiwei Xun, Haiyan Sun, Jie Fan, Xiulin Xu, Yunhua School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin300072 China State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou310027 China Key Laboratory for Green Chemical Technology Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin300072 China

Lithium metal batteries (LMBs) have been viewed as one of the most promising high energy-density battery systems. However, their practical application is hindered by lithium dendrite growth. Herein, an electrolyte regulation strategy is developed to suppress the lithium dendrite growth and enhance the compatibility between electrolyte and electrodes through increasing the concentration of LiNO3 by introducing a high donor number (DN) solubilizer of trimethyl phosphate (TMP). This can not only effectively regulate the solvation structures but also form robust and ionic-conductive SEI films with inorganic-rich inner and organic-rich outer layers to protect Li metal anode. A high compatibility of the engineered electrolyte was obtained with Li metal anodes and high voltage cathodes. As a result, a high Coulombic efficiency of 99.1% and plating/stripping stability of Li metal anode were realized in Li||Cu cells. Furthermore, an excellent performance was demonstrated in Li||LiNi0.83Co0.11Mn0.06O2 (NCM83) full cells and Cu||NCM83 anode-free cells using a high mass-loading cathodes. This work provides a facile electrolyte engineering strategy through introducing a high donor number solubilizer for high energy density LMBs. © 2023, The Authors. All rights reserved.

关键词： Anodes

Research prospects of graphene-based catalyst for seawater electrolysis

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材料展望（英文）

材料展望（英文） 2023年第4期 77-94页

作者： Xinyu Li Yingjie Liu Yanhui Feng Yunwei Tong Zhenbo Qin Zhong Wu Yida Deng Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072People's Republic of China Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072People's Republic of China Key Laboratory of Composite and Functional Materials School of Material Science and Engineering Tianjin UniversityTianjin 300072People's Republic of China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228People's Republic of China Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072People's Republic of China Key Laboratory of Composite and Functional Materials School of Material Science and Engineering Tianjin UniversityTianjin 300072People's Republic of China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New CityFuzhou 350207People's Republic of China

Seawater has obvious resource reserve advantages compared to fresh water,and so the huge potential advantages for large-scale electrolysis of hydrogen production has been paid more attention to;but at the same time,electrolysis of seawater requires more stable and active catalysts to deal with seawater corrosion ***-based materials are very suitable as composite supports for catalysts due to their high electrical conductivity,specific surface area,and ***,the review introduces the problems faced by seawater electrolysis for hydrogen production and the various catalysts *** them,the advantages of catalysis of graphene-based catalysts and the methods of enhancement the catalytic performance of graphene are ***,the development direction of composite catalysts is prospected,hoping to provide guidance for the preparation of more efficient electrocatalysts for seawater electrolysis.

关键词： graphene seawater electrolysis catalyst