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Scalable single-step deposition of recyclable TiO2@Au monolayer coatings for enhanced visible-light photocatalysis of methylene blue dye

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RSC Advances 2025年第18期15卷 14264-14272页

作者： Zhang, Shaobo Yang, Jun Wu, Ranhong Li, Die Zhang, Xinjiang Zheng, Mingshan Jiang, Yi Ma, Haiguang Yang, Deren Yu, Xuegong State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Zhejiang Hangzhou310027 China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou311200 China Quartz Technology Co. Ltd Quzhou324000 China

Titanium dioxide@gold (TiO2@Au) nanocomposite monolayers with enhanced visible-light photocatalysis were synthesized via an air-water interfacial self-assembly and pyrolysis strategy. This method simultaneously embeds Au nanoparticles (5-20 nm) within TiO2 and reduces the bandgap from 3.02 eV to 2.66 eV via interfacial charge redistribution. In a 200 ml aqueous reaction system, the TiO2@Au monolayers demonstrated a visible-light-driven methylene blue degradation rate of 0.0054 min−1-3.6-fold higher than pure TiO2, attributed to Au's localized surface plasmon resonance (LSPR) enhancing visible-light absorption and interfacial electron transfer. The system maintained 99.2% activity retention over five cycles, showcasing unprecedented stability in large-volume wastewater treatment scenarios. This method leverages self-limiting assembly at the air-water interface to orchestrate the molecular packing of organometallic precursor films, which upon pyrolysis yield centimeter-scale nanocomposite monolayers. The developed methodology provides a practical pathway for industrial photocatalytic wastewater purification. © 2025 The Royal Society of Chemistry.

关键词： Pyrolysis

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Waveguide superlattices with artificial gauge field toward colorless and low-crosstalk ultrahigh-density photonic integration

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advanced Photonics 2025年第1期7卷 14-22页

作者： Xuelin Zhang Jiangbing Du Ke Xu Zuyuan He Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghaiChina Harbin Institute of Technology(Shenzhen) Department of Electronic and Information EngineeringShenzhenChina

Dense waveguides are the basic building blocks for photonic integrated circuits(PICs).Due to the rapidly increasing scale of PIC chips,high-density integration of waveguide arrays working with low crosstalk over broadband wavelength range is highly ***,the subwavelength regime of such structures has not been adequately explored in *** propose a waveguide superlattice design leveraging the artificial gauge field mechanism,corresponding to the quantum analog of field-induced n-"photon"resonances in semiconductor *** approach experimentally achieves-24 dB crosstalk suppression with an ultrabroad transmission bandwidth more than 500 nm for dual polarizations on the Si_3N_4 *** fabricated waveguide superlattices support high-speed signal transmission of 112 Gbit/s with high-fidelity signal-to-noise ratio profiles and bit error *** design,featuring a silica upper cladding,is compatible with standard metal back-end-of-the-line *** on such a fundamental structure,which is readily transferable to other platforms,passive and active devices over versatile platforms can be realized with a significantly shrunk on-chip footprint,thus it holds great promise for significant reduction of the power consumption and cost in PICs.

关键词： silicon nitride waveguides waveguide superlattice artificial gauge field

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Exploration of novel structure for high-power X-ray converter

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Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 2025年 564卷

作者： Chen, Taiyan Yuan, Jushigang Chen, Xihao Chen, Zhiyan Hao, Shuai Huang, Jiang State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan430074 China Key laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan430074 China

The conversion of electron beams into X-rays with high penetration capability is an important technique in radiation processing. Previous designs of high-power X-ray converters sacrificed conversion efficiency to achieve high heat dissipation. In this study, a novel high-power converter structure was developed to improve the conversion efficiency of X-rays and reduce energy deposition in the converter. The structure involves vacuum welding of a tantalum plate onto a tooth-shaped copper plate with uniform thickness and forming multiple trapezoidal grooves between the tantalum and copper layers to serve as cooling channels. Geant4 simulation was employed to evaluate the power conversion when the converter was subjected to electron beam bombardment. The optimized converter reduced the loss of X-rays passing through it. Finite element analysis was performed to assess the temperature and deformation of the converter and determine the cooling parameters required to meet operational requirements. Based on the converter structure developed in this study, three potential tantalum–copper connection processes were analyzed, revealing superior performances with vacuum brazing. The novel X-ray converter has now been manufactured and assembled. © 2025

关键词： Vacuum brazing

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Regulation of the sintering trajectory of Ho,Pr:Y_(2)O_(3) ceramics for 2.9μm mid-infrared lasers by atmospheric sintering

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Journal of advanced Ceramics 2025年第1期14卷 81-89页

作者： Qing Li Fei Liang Jun Wang Yan Ling Xue Jie Ma Peng Liu Shiyu Sun Zhan Hui Jian Zhang Changhua Zhang Lili Hu Haohai Yu Huaijin Zhang Dingyuan Tang State Key Laboratory of Crystal Materials and Institute of Crystal Materials Shandong UniversityJinan 250100China Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic EngineeringJiangsu Normal UniversityXuzhou 221116China Shanghai Key Laboratory of Multidimensional Information Processing School of Communication and Electronics EngineeringEast China Normal UniversityShanghai 200241China Shanghai Branch Hefei National Laboratoryand Shanghai Research Center for Quantum SciencesShanghai 201315China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201899China Future Technology School Shenzhen Technology UniversityShenzhen 518118China

The sintering trajectory of the Ho,Pr:Y_(2)O_(3) ceramics could be effectively adjusted by sintering in a flowing oxygen atmosphere instead of *** final-stage grain growth was significantly suppressed by the use of oxygen atmosphere presintering,resulting in smaller average grain sizes than those of samples sintered under vacuum,while the same relative density was *** hot isostatic pressing(HIP),the oxygen presintered Ho,Pr:Y_(2)O_(3) ceramics achieved excellent optical quality,with transmittance exceeding 80%at a wavelength of 680 *** codoping of Pr^(3+) as deactivating ions effectively depopulated the lower energy level 5I7 during the Ho^(3+):^(5)I_(6)→^(5)I_(7) transition,thereby making the Ho,Pr:Y_(2)O_(3) ceramics more conducive to promoting population inversion in the 2.9μm laser wavelength range.

关键词： Y_(2)O_(3) ceramics sintering trajectory Ho^(3+)/Pr^(2+) mid-infrared laser fluorescence properties

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Stabilizing zinc anodes with robust interfacial layer at bending states toward flexible zinc batteries

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Nano Research 2025年第3期18卷 252-262页

作者： Jianyu Chen Yuwei Zhu Fanlai Zhang Yizhou Wang Wendi Xu Yu Zhang Li Shi Xing Qiang Yanwen Ma Jin Zhao State Key Laboratory of Flexible Electronics(LoFF)&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&TelecommunicationsNanjing 210023China Jiangsu Materials Research Society Nanjing 210003China Suzhou Vocational Institute of Industrial Technology Suzhou 215104China

Flexible energy storage plays a crucial role in the field of flexible electronics,because it provides the energy supply,and its technological advancement directly affects the performance and application scope of flexible *** an important flexible energy storage technology member,aqueous zinc(Zn)ion batteries(AZIBs)have garnered considerable attention due to their high safety and low ***,the development of flexible AZIBs is hindered by Zn metal anodes(ZMAs),where Zn is prone to growing into dendritic structures,especially in a curved state,and thus leads to battery ***,we design a robust interfacial layer(RIL)for stabilizing ZMAs in flexible AZIBs,whose introduction constructs uniform Zn ion channels and releases stress accumulation on the anode *** experiments and calculations are employed to verify the effectiveness of RIL in suppressing Zn dendrite at bending ***,a Zn|MnO_(2)flexible pouch battery with RIL is demonstrated with stable cycling performance during *** believe this study provides new possibilities for regulating Zn deposition under bending conditions and extends its application to flexible wearable aqueous metal batteries.

关键词： aqueous zinc ion batteries(AZIBs) zinc dendrites robust interfacial layer bending states flexible batteries

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Research Status of Short Process Forming Techniques for Brazing and Soldering Materials

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稀有金属材料与工程 2025年第2期54卷 377-384页

作者： Dong Bowen Shi Guangyuan Zhong Sujuan Dong Xian Cheng Yafang Long Weimin Zhang Guanxing State Key Laboratory of Advanced Brazing Filler Metals&Technology Zhengzhou Research Institute of Mechanical Engineering Co.LtdZhengzhou 450001China School of Materials Electronics and Energy Storage Zhongyuan University of TechnologyZhengzhou 450007China

Short process forming techniques for brazing and soldering materials can shorten the process,improve product quality,and increase production efficiency,which has received much attention from welding *** review mainly summarized the research reports on short process forming techniques for brazing and soldering ***,the traditional process and its shortcomings were ***,the latest research of short process forming technologies,such as continuous casting technique,atomization powder technique,solder ball forming technique,and rapid solidification technique,was summarized,and the traditional forming performance of several brazing and soldering materials was ***,the current restrictions and research trends of short process forming technique for brazing and solder materials were put forward,providing theoretical guidance and reference for related research and technique development in brazing and soldering field.

关键词： short process forming technique continuous casting atomization powder soldering ball rapid solidification amorphous filler metals

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Boosting cationic and anionic redox activity of Li-rich layered oxide cathodes via Li/Ni disordered regulation

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Journal of Energy Chemistry 2025年第1期100卷 533-543页

作者： Zewen Liu Zhen Wu Hao Wang Xudong Zhang Yuanzhen Chen Yongning Liu Shengwu Guo Shenghua Chen Yanli Nan Yan Liu State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Hefei Advanced Computing Center Operation Management Corp Ltd Hefei 230088AnhuiChina Network Information Center Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Lithium-rich layered oxides (LLOs) are increasingly recognized as promising cathode materials for nextgeneration high-energy-density lithium-ion batteries (LIBs).However,they suffer from voltage decay and low initial Coulombic efficiency (ICE) due to severe structural degradation caused by irreversible O ***,we introduce a three-in-one strategy of increasing Ni and Mn content,along with Li/Ni disordering and TM–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of *** target material,Li_(1.2)Ni_(0.168)Mn_(0.558)Co_(0.074)O_(2)(L1),exhibits an improved ICE of 87.2%and specific capacity of 293.2 mA h g^(-1)and minimal voltage decay of less than 0.53 m V cycle-1over 300 cycles at 1C,compared to Li_(1.2)Ni_(0.13)Mn_(0.54)Co_(0.13)O_(2)(Ls)(274.4 mA h g^(-1)for initial capacity,73.8%for ICE and voltage decay of 0.84 mV/cycle over 300 cycles at 1C).Theoretical calculations reveal that the density of states (DOS) area near the Fermi energy level for L1 is larger than that of Ls,indicating higher anionic and cationic redox reactivity than ***,L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76%(quantified by X-ray diffraction Rietveld refinement) and enhanced TM–O covalency,making lattice O release more difficult and thus improving electrochemical *** increased Li/Ni disordering also leads to more Ni^(2+)presence in the Li layer,which acts as a pillar during Li+de-embedding,improving structural *** research not only presents a viable approach to designing low-Co LLOs with enhanced capacity and ICE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.

关键词： Low-Co Li-rich layered oxides Li/Ni disordering TM-O covalency Cationic and anionic redox activity

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Strategies for Guiding Directional Topological Waveguides with Symmetric Regularity

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Journal of Lightwave technology 2025年第10期43卷 4913-4918页

作者： Yu, Wenjia Liu, Shiyu Sun, Hang Wang, Jicheng Yang, Yuting Jiangnan University School of Science Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology Wuxi214122 China Soochow University Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Suzhou215006 China China University of Mining and Technology School of Materials Science and Physics Xuzhou221116 China Southeast University China and the State Key Laboratory of Millimeter Waves Nanjing210096 China Soochow University The Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Suzhou215006 China

The advantageous characteristics of topological photonic crystals facilitate the directional manipulation of waveguides. In this study, we propose a topological photonic crystal that breaks C4 symmetry through rotation, resulting in a symmetric gradient of topological edge state frequencies in both vertical and horizontal directions, thereby enabling precise control over the direction of the edge states. We developed two types of three-channel composite devices informed by our analysis of the transmission characteristics of photonic crystal arrays. These application were experimentally demonstrated in this study. We also construct an eight-path optical device in which topological edge states appear in succession with decreasing wavelengths. These regular transmission waveguides offer new opportunities for device design and the realization of multifunctional effects. © 1983-2012 IEEE.

关键词： Topology

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Dynamic liquid film nanochannels for adjustable ion and molecule transport

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Nano Research 2025年第3期18卷 494-501页

作者： Chunxiao Liang Dianyu Wang Zhe Xu Haitao Deng Fan Xia Ye Tian Key Laboratory of Bioinspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Biogeology and Environmental Geology Engineering Research Center of Nano-Geomaterials of Ministry of EducationFaculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

Gating,a fundamental feature of biological nanochannels,enables the intelligent regulation of ion and molecule transport in response to specific *** by nature,numerous artificial gating systems have been researched through the functionalization of solid-state ***,these gating systems typically allow only two transitions:“open”and“closed”,which makes it challenging to achieve multi-state ***,we construct dynamic liquid film nanochannels(DLFNs)by inserting an oil droplet into a capillary with gradient wettability that is filled with ionic *** liquid film,formed between the oil and the capillary,functions as a nanochannel for ion and molecule transport,with its height dynamically adjusted through the capillary's gradient *** a deeper level,the variations in liquid film thickness are driven by the interfacial water structure,which is mediated by hydrogen bonding ***,unlike traditional solid-state nanochannels,which involve two phases(liquid/solid),the properties of DLFNs are influenced by three phases(oil/water/solid),resulting in distinct performance characteristics,such as reconfigurability,low cost,and ease of *** work provides an avenue for designing dynamic nanofluids and may spark promising applications of DLFNs with multiscale gating properties in drug delivery,microreactors,sieving,biosensing,and other related fields.

关键词： dynamic liquid film nanochannel gating wettability oil-water-solid interface

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Distributed Adaptive Tracking Control for Fuzzy Nonlinear MASs Under Round-Robin Protocol

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IEEE Transactions on Fuzzy Systems 2025年第5期33卷 1488-1498页

作者： Fan, Sha Meng, Min Fu, Yukai Deng, Chao Nanjing University of Posts and Telecommunications College of Automation College of Artificial Intelligence Nanjing210023 China Tongji University Department of Control Science and Engineering College of Electronics and Information Engineering Shanghai200070 China Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Shenyang110016 China Chinese Academy of Sciences Key Laboratory of Networked Control Systems Shenyang110016 China Nanjing University of Posts and Telecommunications Institute of Advanced Technology Nanjing210049 China

In this article, the cooperative fuzzy tracking control problem for a type of high-order nonlinear multi-agent systems under the Round-Robin (RR) communication protocol is solved. To effectively reduce the communication among agents, an RR communication protocol is first proposed, where each agent can communicate with only one neighbor at any given time. Based on the developed communication protocol, a hierarchical control approach is introduced, consisting of a distributed observer layer that utilizes information from both local and neighboring agents, and a decentralized control layer that operates solely based on local agent information. Specifically, a distributed observer is designed in the distributed observer layer to achieve the distributed observation objective by introducing a time-varying gain in the observer input. Furthermore, an improved distributed observer with the upper triangular form is constructed to produce a signal with high-order derivatives. In the decentralized control layer, fuzzy adaptive controllers are designed for all agents by using the backstepping technique. By using the Lyapunov stability theory, rigorous stability analysis shows that the cooperative fuzzy tracking control problem is solved under the developed hierarchical control approach. In the end, a simulation example is presented to demonstrate the validity of our proposed method. © 1993-2012 IEEE.

关键词： Protocols Observers Stability analysis Decentralized control Backstepping Vectors Symmetric matrices Network topology Telecommunications System dynamics

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