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Synthesis of crystal-phase and color tunable mixed anion co-doped titanium oxides and their controllable photocatalytic activity

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International Journal of Minerals,Metallurgy and Materials 2023年第10期30卷 2036-2043页

作者： Jingdi Cao Takuya Hhasegawa Yusuke Asakura Akira Yamakata Peng Sun Wenbin Cao Shu Yin Institute of Multidisciplinary Research for Advanced Materials Senda 980-8577Japan Kagami Memorial Research Institute for Materials Science and Technology Waseda UniversityShinju-ku 169-0051Japan Graduate School of Natural Science and Technology Okayama UniversityOkayama 700-8530Japan University of Science and Technology Beijing Beijing 100083China Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

B and N mixed anions co-doped titania with various crystal phases such as anatase,brookite,and rutile were successfully synthesized by a hydrothermal synthesis followed by heat treatment in an ammonia gas atmosphere at 550-650℃(denoted as BN-Ana_x,BN-Bro_x,and BN-Rut_x,x is the treatment temperature).The colors of as-prepared BN-Ana,BN-Bro,and BN-Rut are red,yellow-green,and cyangreen,*** color changing mechanism of titania was related to their various band gap structure and the existence of B-N *** nitridation temperature exhibits effective color changing compared to that of nitridation *** different phases of the mixed anion codoped titania possess different photocatalytic deNO_(x) *** BN-Ana and BN-Rut show poor photocatalytic deNO_(x) activity,while the BN-Bro shows excellent photocatalytic deNO_(x) activity,better than that of standard titania photocatalyst Degussa *** colorful titania with low-photocatalytic activity is heavy metal elements free,indicating their possible applications as nontoxic color pigments or novel cosmetic raw materials.

关键词： colorful titania toxic elements free mixed anion compounds pigment photocatalytic activity cosmetic application

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Spectra-assisted laser focusing in quantitative analysis of laser-induced breakdown spectroscopy for copper alloys

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Plasma science and technology 2023年第4期25卷 204-209页

作者：李守杰郑荣儿出口祥啓叶旺全田野郭金家李颖卢渊 College of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao 266100People’s Republic of China Graduate School of Advanced Technology and Science Tokushima UniversityTokushima 770-8501Japan

Laser-induced breakdown spectroscopy(LIBS)is a capable technique for elementary analysis,while LIBS quantitation is still under *** quantitation,precise laser focusing plays an important role because it ensures the distance between the laser and *** the present work,we employed spectral intensity as a direct way to assist laser focusing in LIBS quantitation for copper *** is found that both the air emission and the copper line could be used to determine the position of the sample surface by referencing the intensity ***,the fine quantitation was only realized at the position where the air emission(e.g.O(I)777.4 nm)reached intensity maximum,and also in this way,a repeatable quantitation was successfully achieved even after 120 *** results suggested that the LIBS quantitation was highly dependent on the focusing position of the laser,and spectra-assisted focusing could be a simple way to find the identical condition for different samples’*** the future,this method might be applicable in field measurements for LIBS analysis of solids.

关键词： LIBS laser focusing spectra assistance quantitative analysis copper alloys

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High-performance localized high-concentration electrolytes by diluent design for long-cycling lithium metal batteries

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Chinese Chemical Letters 2024年第4期35卷 244-247页

作者： Zhe Wang Li-Peng Hou Qian-Kui Zhang Nan Yao Aibing Chen Jia-Qi Huang Xue-Qiang Zhang College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Electrolyte design is essential for stabilizing lithium metal anodes and localized high-concentration electrolyte(LHCE) is a promising one. However, the state-of-the-art LHCE remains insufficient to ensure long-cycling lithium metal anodes. Herein, regulating the solvation structure of lithium ions in LHCE by weakening the solvating power of diluents is proposed for improving LHCE performance. A diluent,1,1,2,2,3,3,4,4-octafluoro-5-(1,1,2,2-tetrafluoroethoxy) pentane(OFE), with weaker solvating power is introduced to increase the proportion of aggregates(an anion interacts with more than two lithium ions,AGG-n) in electrolyte compared with the commonly used 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether(TTE). The decomposition of AGG-n in OFE-based LHCE intensifies the formation of anion-derived solid electrolyte interphase and improves the uniformity of lithium deposition. Lithium metal batteries with OFE-based LHCE deliver a superior lifespan of 190 cycles compared with 90 cycles of TTE-based LHCE under demanding conditions. Furthermore, a pouch cell with OFE-based LHCE delivers a specific energy of 417 Wh/kg and undergoes 49 cycles. This work provides guidance for designing high-performance electrolytes for lithium metal batteries.

关键词： Lithium metal anodes Electrolyte Diluents Solid electrolyte interphase Pouch cells

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Writing in the Air: Unconstrained Text Recognition from Finger Movement Using Spatio-Temporal Convolution

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2023年第6期4卷 1386-1398页

作者： Kim, Ue-Hwan Hwang, Yewon Lee, Sun-Kyung Kim, Jong-Hwan Gwang-ju Institute of Science and Technology AI Graduate School Gwang-Ju61005 Korea Republic of Korea Advanced Institute of Science and Technology School of Electrical Engineering Daejeon34141 Korea Republic of

In this article, we introduce a new benchmark dataset for the challenging writing in the air (WiTA) task-an elaborate task bridging vision and natural language processing (NLP). WiTA implements an intuitive and natural writing method with finger movement for human-computer interaction (HCI). Our WiTA dataset will facilitate the development of data-driven WiTA systems, which, thus, far have displayed unsatisfactory performance-due to lack of dataset as well as traditional statistical models they have adopted. Our dataset consists of five subdatasets in two languages (Korean and English) and amounts to 209 926 video instances from 122 participants. We capture finger movement for WiTA with red-green-blue (RGB) cameras to ensure wide accessibility and cost-efficiency. Next, we propose spatio-temporal residual network architectures inspired by 3-D ResNet. These models perform unconstrained text recognition from finger movement, guarantee a real-time operation [>100 frames per second (FPS)], and will serve as an evaluation standard. © 2020 IEEE.

关键词： Convolution

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SEISMIC DAMPING EFFECTS OF DISPLACEMENT-RESTRAINT BUCKLING-RESTRAINED BRACES IN STEEL HIGH-RISE BUILDING STRUCTURES

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AIJ Journal of technology and Design 2024年第76期30卷 1305-1310页

作者： Sakai, Makoto Tagawa, Hiroshi Chen, Xingchen Uehara, Makoto Nishimura, Makoto Structural Design Dept. Tekken Corporation Japan Graduate School of Advanced Science and Engineering Hiroshima Univ. Japan Architectural Technology Dept. Tekken Corporation Japan

The use of buckling-restrained brace in frames shortens the natural period and possibly increases the seismic input. To overcome this issue, this paper proposes a displacement-restraint buckling-restrained brace in which no axial force occurs initially and the axial force occurs with a delay. Thereby, the natural period can maintain the same level as the moment frame without bracing and the concentration of the deformation into the local stories can be avoided. In this study, a trial design and seismic response analyses of a high-rise building model are conducted to reveal the effectiveness of the proposed braces. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Buckling

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High Temperature Tolerant Ge-on-Si Single Photon Avalanche Diode at the Communication Wavelength

IEEE Electron Device Letters

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IEEE Electron Device Letters 2024年第8期45卷 1413-1416页

作者： Chen, Chi-En Huang, Shih-Min Wang, Tzu-Jui Hsu, Ming-Chieh Huang, Kuan-Chieh Wu, Jau-Yang Wu, Chao-Hsin National Taiwan University Graduate School of Advanced Technology The Center for Quantum Science and Engineering Taipei106319 Taiwan Taiwan Semiconductor Manufacturing Company Hsinchu300 Taiwan Yuan Ze University Department of Electrical Engineering Taoyuan32003 Taiwan National Taiwan University Graduate Institute of Electronics Engineering The Center for Quantum Science and Engineering The Graduate Institute of Photonics and Optoelectronics The Graduate School of Advanced Technology Taipei106319 Taiwan

We present a practical design concept to reduce the noise of Ge-on-Si single photon avalanche diodes to improve temperature operation. In this letter, three different values of barrier height design have been investig... 详细信息

关键词： Photons

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Latest advances in ionic liquids promoted synthesis and application of advanced biomass materials

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Frontiers of Chemical science and engineering 2023年第7期17卷 798-816页

作者： Ting He Jipeng Yan Wenzhe Xiao Jian Sun Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology School of Life ScienceBeijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center of Cellulose and Its Derivatives Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081China

The utilization of sustainable resources provides a path to relieving the problem of dependence on fossil resources. In this context, biomass materials have become a feasible substitute for petroleum-based materials. The development of biomass materials is booming and advanced biomass materials with various functional properties are used in many fields including medicine, electrochemistry, and environmental science. In recent years, ionic liquids have been widely used in biomass pretreatments and processing owing to their “green” characteristics and adjustable physicochemical properties. Thus, the effects of ionic liquids in biomass materials generation require further study. This review summarizes the multiple roles of ionic liquids in promoting the synthesis and application of advanced biomass materials as solvents, structural components, and modifiers. Finally, a prospective approach is proposed for producing additional higher-quality possibilities between ionic liquids and advanced biomass materials.

关键词： biomass materials functional materials ionic liquids synthesis structure-property relationship

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A self-stabilizing distributed algorithm for the 1-MIS problem under the distance-3 model

A self-stabilizing distributed algorithm for the 1-MIS probl...

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作者： Kakugawa, Hirotsugu Kamei, Sayaka Shibata, Masahiro Ooshita, Fukuhito Faculty of Advanced Science and Technology Ryukoku University Shiga Otsu Japan Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima Higashihiroshima Japan Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Iizuka Japan Faculty of Engineering Fukui University of Technology Fukui Fukui Japan

Fault-tolerance and self-organization are critical properties in modern distributed systems. Self-stabilization is a class of fault-tolerant distributed algorithms which has the ability to recover from any kind and any finite number of transient faults and topology changes. In this article, we propose a self-stabilizing distributed algorithm for the 1-MIS problem under the unfair central daemon assuming the distance-3 model. Here, in the distance-3 model, each process can refer to the values of local variables of processes within three hops. Intuitively speaking, the 1-MIS problem is a variant of the maximal independent set (MIS) problem with improved local optimizations. The time complexity (convergence time) of our algorithm is (Formula presented.) steps and the space complexity is (Formula presented.) bits, where (Formula presented.) is the number of processes. Finally, we extend the notion of 1-MIS to (Formula presented.) -MIS for each nonnegative integer (Formula presented.), and compare the set sizes of (Formula presented.) -MIS ((Formula presented.)) and the maximum independent set. © 2024 John Wiley & Sons Ltd.

关键词： Consensus algorithm

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Unraveling the chemical and structural evolution of novel Li-rich layered/rocksalt intergrown cathode for Li-ion batteries

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Chinese Chemical Letters 2024年第12期35卷 289-293页

作者： Yongjian Li Xinyu Zhu Chenxi Wei Youyou Fang Xinyu Wang Yizhi Zhai Wenlong Kang Lai Chen Duanyun Cao Meng Wang Yun Lu Qing Huang Yuefeng Su Hong Yuan Ning Li Feng Wu School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

The prototype material,Li_(1.23)Ru_(0.41)Ni_(0.36)O_(2),is proposed to gain the deep and comprehensive understanding of chemical and structural changes of the novel layered/rocksalt intergrown *** X-ray absorption spectra and resonant inelastic X-ray scattering reveal that both cationic and anionic redox evolves in the charge compensation process of the intergrown material,while synchrotronbased extended X-ray fine structure spectra and in situ X-ray diffraction measurements demonstrates that the intergrown material undergoes minimal local-and long-range structural variations at deep de/*** work highlights the great potential of the intergrown structure to inspire the design of advanced cathode materials for lithium-ion batteries.

关键词： Cathode materials Intergrown structure Cationic-anionic redox Low strain Synchrotron characterizations

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Protecting lithium metal anodes in lithium-sulfur batteries:A review

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Energy Material Advances 2023年第1期4卷 34-56页

作者： Chen-Xi Bi Li-Peng Hou Zheng Li Meng Zhao Xue-Qiang Zhang Bo-Quan Li Qiang Zhang Jia-Qi Huang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Lithium-sulfur(Li-S)batteries are considered as one of the most promising next-generation energy storage devices because of their ultrahigh theoretical energy density beyond lithium-ion *** cycling stability of Li metal anode largely determines the prospect of practical applications of Li-S *** review systematically summarizes the current advances of Li anode protection in Li-S batteries regarding both fundamental understanding and regulation ***,the main challenges of Li metal anode instability are introduced with emphasis on the influence from lithium ***,a timeline with 4 stages is presented to afford an overview of the developing history of this *** that,3 Li anode protection strategies are discussed in detail in aspects of guiding uniform Li plating/stripping,reducing polysulfide concentration in anolyte,and reducing polysulfide reaction activity with Li ***,3 viewpoints are proposed to inspire future research and development of advanced Li metal anode for practical Li-S batteries.

关键词： field lithium sulfur

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