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Suitable lithium polysulfides diffusion and adsorption on CNTs@TiO_(2)-bronze nanosheets surface for high-performance lithium-sulfur batteries

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Nano Research 2022年第2期15卷 933-941页

作者： Mengmeng Zhen Keliang Jiang sheng-qi guo Boxiong Shen Huiling Liu Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental EngineeringHebei University oj TechnologyTianjin 300401China Tianjin Key Laboratory of Advanced Functional Porous Materials and Center for Electron Microscopy Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300071China

The shuttle effect of lithium polysulfides(UPSs)in lithium-sulfur batteries(LSBs)has been hampered their *** oxides as separator modifications can suppress the shuttle *** there is no direct electron transport between metal oxides and UPSs,absorbed UPSs should be diffused from the surface of metal oxides to the carbon matrix to go through redox *** diffusivity of UPSs from metal oxides surface to carbon substrate is poor,it would hinder the redox reactions of ***,researchers tend to focus on the adsorption and overlook the diffusion of ***,same morphology and different crystal phase of TiO_(2) nanosheets grown on carbon nanotubes(CNTs@TiO_(2)-bronze and CNTs@TiO_(2)-anatase)have been designed via a simple *** with CNTs and CNTs@TiO_(2)-anatase composites,the battery with CNTs@TiO_(2)-bronze modified separator delivers higher specific capacities and stronger cycling stability,especially at high current rates(~472 mAh·g^(-1) at 2.0 C after 1,000 cycles).Adsorption tests,density functional theory calculations and electrochemical performance evaluations indicate that suitable diffusion and adsorption for LiPSs on the CNTs@TiO_(2)-B surface can effectively capture LiPSs and promote the redox reaction,leading to the superior cycling performances.

关键词： lithium polysulfides Li ion diffusion adsorption TiO_(2)-bronze surface long-term cycling performances

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Tendencies of alloyed engineering in BiOX-based photocatalysts:a state-of-the-art review

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Rare Metals 2024年第4期43卷 1488-1512页

作者： Yan-Dong Sun Chao Zeng Xue Zhang Zi-qi Zhang Bo Yang sheng-qi guo Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China State-Province Joint Engineering Laboratory of Zeolite Membrane Materials Institute of Advanced MaterialsCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang330022China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation School of Physics and Electronic InformationAnhui Province Industrial Generic Technology Research Center for Alumics MaterialsHuaibei Normal UniversityHuaibei235000China

Energy-saving and environmentally friendly photocatalysis has emerged as a popular research area in response to issues with energy scarcity and environmental *** to the unique layer-like structure,BiOX(Cl,Br,I)is frequently used in ***,inherent flaws in BiOX,such as an inappropriate band gap and low carrier separation efficiency,restrict its capacity for *** to the tunable grouping layer,alloying engineering is employed to optimize the intrinsic properties of BiOX and alloyed BiOX becomes a promising photocatalytic *** review describes the structure of BiOX,where tunable halogen layers provide favorable conditions for the implementation of alloying engineering to improve intrinsic *** article compares the effects and mechanisms of alloying engineering on the optimization of the energy band structure and carrier behavior of BiOX,and lists various modification methods used to improve the optimization of the intrinsic properties by alloying engineering,including defect engineering,morphology control as well as the synergy between alloying and other modification methods(bismuth-rich strategies,cation doping,construction of heterojunctions and plasma resonance effects).Subsequently,applications of alloyed BiOX in energy and environmental fields are summarized,including contaminant degradation,antibacterial,CO_(2)reduction,nitrogen fixation and organic ***,we summarize the current challenges and future directions of alloyed *** is expected that this work will provide guidance and assistance for an in-depth study and understanding of the mechanisms of alloying engineering to optimize intrinsic properties and design alloyed BiOX with higher photocatalytic activity.

关键词： Bismuth oxyhalide Photocatalytic Alloyed engineering Microstructural regulation Application

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Uncovering mechanism of photocatalytic performance enhancement induced by multivariate defects on SnS_(2)

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Nano Research 2023年第2期16卷 2102-2110页

作者： sheng-qi guo Bo Yang Zhenzhong Hu Mengmeng Zhen Bingchuan Gu Boxiong Shen Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300401China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Huaibei Normal UniversityHuaibei 235000China State Key Laboratory of Particle Detection and Electronics University of Science&Technology of ChinaHefei 230026China

Defect engineering is recognized as an effective route to obtain highly active photocatalytic ***,the current understanding of defects is mainly limited to isolated atomic vacancy defects,ignoring the exploration of the functions of multivariate defects formed by the deletion of several adjacent atoms in photocatalytic ***,we prepared SnS2 nanostructures with the same morphology but different dominant defects,and by testing their photocatalytic performance,it was found that the multivariate defects can significantly improve the photocatalytic performance than isolated S *** experiments and theoretical calculations,we confirmed that the promotion of multivariate defects,especially“S-Sn-S”vacancy associates,on the photocatalytic performance is reflected in many aspects,such as the regulation of the energy band structure,the improvement of the charge separation efficiency,and the promotion of the adsorption and activation of guest ***2 with“S-Sn-S”vacancy associates exhibits excellent photocatalytic water purification *** the induction of“S-Sn-S”vacancy associates,phenol was thoroughly photocatalytically decomposed,further confirming its excellent *** work not only provides new insights into identifying advantage defects in the catalyst structure,but also offers new ideas for constructing highly active photocatalysts based on defect engineering.

关键词： SnS2 multivariate defects photocatalysis pollutants degradation reaction mechanism

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Composition-dependent micro-structure and photocatalytic performance of g-C_(3)N_(4) quantum dots@SnS2 heterojunction

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Nano Research 2021年第11期14卷 4188-4196页

作者： sheng-qi guo Haijun Zhang Zhenzhong Hu Mengmeng Zhen Bo Yang Boxiong Shen Fan Dong Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China Center for Aircraft Fire and Emergency Department of Safety EngineeringCivil Aviation University of ChinaTianjin300300China Yangtze Delta Region Institute(Huzhou) &Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaHuzhou313001China Institute of Advanced Technology University of Science and Technology of ChinaHefei230088China

Semiconductor combination is one of the most common strategies to obtain high-efficiency photocatalysts;however, the effect mechanism of composition ratio on micro-structure and photocatalytic activity is remaining unclear. In this study, a case of g-C_(3)N_(4) quantum dots@SnS_(2) (CNQDn@SnS_(2)) heterojunction with different ratio of CNQD is used to uncover the origin of optimum and excess composition for photocatalysts. Research on the functional mechanism of the optimum composition shows that 0.8 wt.% CNQD are completely attached to the non-(001) facets of SnS_(2), which benefits the formation of type-II heterojunction, resulting in an optimal pollutant degradation and mineralization efficiency. For the excess composition, both experiments and theoretical calculations confirm that excess CNQD (the part exceeding of 0.8 wt.%) located on the (001) facet of SnS_(2), leading to the type-I band alignment of this heterojunction, which severely restricts the separation of photo-induced charge carriers, and thus reduces their lifetime. This work makes the functional mechanism of composition ratio on micro-structure and photocatalytic activity clearer. Related research results provide a new insight into semiconductor combination study and take an important step toward the rational design of highly active photocatalysts.

关键词： heterojunction semiconductor combination composition ratio photocatalyst functional mechanism

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Room-temperature and high-temperature magnetic permeability of Co-doped nanocrystalline alloys

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Rare Metals 2018年第5期37卷 427-432页

作者： Bin Fu Jie Han sheng-qi guo Zhi Wang Pan Zhang Zi-Jiao Pan qiang Xu Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and Engineering Tianjin University of Technology College of Science Tianjin University of Technology School of Science Tianjin University School of Materials Science and Engineering Tianjin University of Technology

Influence of composition and annealing temperature on structure and magnetic properties of amorphous and nanocrystalline Fe78.4-xCoxSi9B9Nb2.6Cu1 （x=27.4, 40.0, 51.0, 78.4） alloys was investigated by X-ray diffraction （XRD） and the temperature dependence of permeability. According to the initial crystallization temperature （Tx1） from differential scanning calorimetry （DSC） curves of as-quenched amorphous alloys, 490-700 ℃ isothermal annealing was carded out to obtain the characteristic nanocrystalline structure. Furthermore, the soft magnetic properties were measured by temperature evolution of magnetic permeability to obtain the correlation between Co content, annealing temperature and magnetic permeability. The results show that, on the one hand, the annealing temperature exerts a significant effect on phase structure and initial permeability （μi）. The higher-temperature （from 550 to 610 ℃） annealed Co content nanocrystalline samples can remain higher μi at elevated temperature. On the other hand, partial substitution Fe by Co can improve the high-temperature magnetic stability;however, the room-temperature permeability of higher Co content alloys decreases obviously at the same time. This phenomenon was analyzed from the viewpoint of the saturation magnetic induction （Bs）, magnetic anisotropy （〈K〉） and magnetostriction （λs）.

关键词： Nanocrystalline alloys High-temperature soft magnetic properties Initial permeability FeCo-based alloy

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A review on WO_(3)-based composite photocatalysts:synthesis,catalytic mechanism and diversified applications

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Rare Metals 2024年第8期43卷 3441-3459页

作者： Xue Zhang Zi-qi Zhang Yan-Dong Sun Xiao-Jia Ma Feng-Xian Jin Fang-Yuan Zhang Wei-Guang Han Bo-Xiong Shen sheng-qi guo College of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Department of Food and Chemical Engineering Liuzhou Institute of TechnologyLiuzhou 545616China

Photocatalysis as an emerging "green" energy conversion technology has attracted domestic and international *** technology uses semiconductor photocatalysts to convert solar energy into directly usable chemical energy,showing great potential for application in environmental pollutant purification and clean energy production,with broad development *** many semiconductor materials,tungsten trioxide(WO_(3)) is favored by researchers in the field of photocatalysis because of its good visible light response and excellent valence band hole oxidation ***,a large number of photocatalysts based on WO_(3),in particular W03-based composite photocatalysts,have been reported,and their applications cover a wide range of *** order to promote the development of WO_(3)-based photocatalysts and provide a reference for colleagues,we present a systematic summary of the applications and research progress of W03-based composites in the field of photocatalysis in recent *** from the structural properties of WO_(3)itself,this article summarizes the preparation methods and structure-activity relationships of WO_(3)-based composite ***,it introduces the current application status of existing WO_(3)-based composite photocatalysts in CO_(2) reduction,hydrogen production,nitrogen fixation,and pollutant ***,the development prospects were analyzed.

关键词： WO_(3)-based composite photocatalysts Intrinsic characteristic Preparation method Reaction mechanism Applications

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Practical approach for detecting k-nonseparability of multipartite quantum states

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 32-48页

作者： Jie guo Jinchuan Hou Xiaofei qi Kan He College of Mathematics Taiyuan University of Technology School of Mathematics and Statistics Shanxi University Key Laboratory of Complex Systems and Data Science of Ministry of Education Shanxi University

The instantaneous detection of entanglement in quantum states poses a significant challenge in the fields of quantum computation and quantum information, and there are no practical methods or tools to complete this task satisfactorily so far. We propose a sufficient and necessary criterion of k-nonseparability for any n-partite finite or infinite dimensional systems, 2 ≤ k ≤ n. This criterion serves as the foundation for a practical scheme designed to detect entanglement and k-nonseparability across multipartite finite-dimensional systems. To exemplify the application of our scheme, we have developed a software tool that facilitates swift and precise identification of entanglement, k-nonseparability, and genuine entanglement within n-qubit systems, specifically tailored for systems with 2 ≤ n ≤ 4.

关键词： multipartite systems entanglement states entanglement witnesses ${\bm~k}$-nonseparability

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Treatment of 320 Cases of Infantile Diarrhea by Needling Technique of Setting Fire on Mountains

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Journal of Acupuncture and Tuina Science 2003年第6期1卷 22-23页

作者： BO Li-ya ZHANG Hui-ling WU Chun-sheng HUANG guo-qi Third Hospital of Hebei Medical University Shijiazhuang China 050051 Third Hospital of Hebei Medical University Shijiazhuang China 050051 Third Hospital of Hebei Medical University Shijiazhuang China 050051

In the treatment of 320 cases of infantile diarrhea by the needling technique of setting fire on mountains, with Zusanli (ST 36) and Changqiang (GV 1) as the main acupoints, all cases were cured after 1–3 treatments. Key Words Diarrhea - Acupuncture Therapy - Mountain Burning Manipulation - Child BO Li-ya (1950-), female, junior consultant doctor. In clinic, be expert in treating cardiovascular disease, cerebrovascular disease, asthma and nephritis.HUANG guo-qi

关键词： Diarrhea Acupuncture Therapy Mountain Burning Manipulation Child

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棉织物的纳米TiO_2溶胶在抗紫外整理

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印染 2006年第19期32卷 32-34页

作者：盛国旗侯强北京中纺化工有限公司北京100025

采用钛醇盐为前驱体，利用溶胶-凝胶技术制得0．016、0．033、0．33mol/L纳米TiO2水溶胶，其粒径为20～50nm。以该溶胶对白色纯棉布进行整理，可取得良好的抗紫外效果，且效果持久，水洗20次后UPF值等级仍为50＋。

关键词：防辐射整理紫外辐射溶胶凝胶纳米二氧化钛棉织物

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不完全量测下事件触发卡尔曼一致滤波及在光电探测网中的应用

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兵工学报 2018年第4期39卷 625-634页

作者：陈烨盛安冬戚国庆李银伢南京理工大学自动化学院江苏南京210094

针对分布式状态估计中卡尔曼一致滤波算法各节点间通信量过大的问题,在保证卡尔曼一致滤波算法估计精度及各节点估计值一致性前提下,为减少各节点间的通信量,提出一种事件触发机制协调各节点间的信息交互过程。推导了相应的卡尔曼一致... 详细信息

针对分布式状态估计中卡尔曼一致滤波算法各节点间通信量过大的问题,在保证卡尔曼一致滤波算法估计精度及各节点估计值一致性前提下,为减少各节点间的通信量,提出一种事件触发机制协调各节点间的信息交互过程。推导了相应的卡尔曼一致滤波算法,并证明了其估计误差的有界性;仿真了所提算法在不完全量测下光电探测网中的应用。研究结果表明:与经典卡尔曼一致滤波算法相比,所提算法可在节约网络通信资源前提下,保证网络中各节点估计精度及估计值的一致性。

关键词：光电探测网分布式估计算法不完全量测事件触发卡尔曼一致滤波

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