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Dual-site Doping to Enhance Oxygen Redox and Structural Stability of Li-rich Layered Oxides

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Chinese Journal of Structural Chemistry 2022年第4期41卷 61-67页

作者： zuhao zhang Xiaoyan Xie Huixian Xie Xiaokai Ding Jiaxiang Cui Chenyu Liu Dong Luo Zhan Lin Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China

Cobalt-free Li-rich layered oxides(LLOs)such as Li_(2)MnO_(3) have attracted extensive attention owing to their high specific capacity and low ***,numerous problems such as continuous voltage fading and capacity decay have become stumbling blocks in its commercial *** this study,we propose an effective dual-site doping strategy by choosing Mo as the cation and F as the anion to enhance the capacity and cycling *** researchdemonstrates that the cycling stability of LLOs enhances with the doping ratio of Mo,and their capacity increases with the doping ratio of *** is because Mo as a pillar enhances the structural stability and F doping is conducive to the activation of Li;MnO;.What’s more,dual-site doping also promotes the diffusion of Li;and reduces the internal resistance of the *** to these improvements,the 5F3M sample still maintains a discharge capacity of 190.98 mAh g;after 100 cycles at 200 mA g^(-1),which is much higher than 165.29 mAh g;of the Pristine *** discovery provides a new way to develop advanced layered oxide cathodes for both Na-and Li-ion batteries.

关键词： lithium-ion battery Li-rich layered oxides doping Li_(2)MnO_(3)

Estimation of the Scale of Artificial Reef Sets on the Basis of Underwater 3D Reconstruction

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Journal of Ocean University of China 2021年第5期20卷 1195-1206页

作者： TANG Yanli zhang zuhao WANG Xinxin Department of Fisheries College Ocean University of ChinaQingdao 266003China

The creation of three-dimensional models from an unorganized set of points is an active research area in computer *** of the purposes of this study is to explore the 3D reconstruction of a cube-type artificial reef(CTAR)set by linear structured light and binocular stereo vision technology in an underwater *** experimental setup is composed of two ca-meras in a stereo vision *** alpha shapes method can be used to construct a surface that most closely reflects the arti-ficial reef set described by the points.A parameter study is conducted to assess the scales of the set(i.e.,usable volume,surface area,projected area,height,and base diameter)on the basis of 3D *** results show that the quality of 3D recon-struction in an underwater environment is acceptable for estimating the scale size of the CTAR *** to the measurement of the scale sizing of the CTAR set,the relationships between the parameters of the CTAR set and the number of CTAR modules were ***,the usable volume of the CTAR set can be estimated depending on the basis of the number of CTAR modules.

关键词： cube-type artificial reef structured light binocular stereo vision three-dimensional reconstruction alpha shapes method

Ball-milling Synthesis of Tetrahydroquinolines via 'One-pot' Three-component Diels-Alder Reaction Catalyzed by Phosphotungstic Acid

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Chemical Research in Chinese Universities 2020年第5期36卷 835-842页

作者： WANG Zeyou SHEN Guodong HUANG Xianqiang GONG Shuwen YANG Bingchuan SUN Zhenzhen zhang zuhao LIU Wanxing School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252000P.R.China Department of Chemistry Liaocheng Chemical Institute of Industrial ScienceLiaocheng 252000P.R.China

We reported an economic and practical ball-milling method for the synthesis of tetrahvdroquinoline derivatives via a wone-pot"three-component Diels-Alder reaction of anilines,aldehydes and alkenes catalyzed by phos-photungstic acid at room *** this reaction,a simple 'one-pot'ball-milling operation was conducted,readily available starting materials were employed,'one-pot'conditions were applied,and the most important was to use inexpensive and environmentally friendly catalyst phosphotungstic *** tetrahvdroquinolines,which might be potentially applicable in the pharmaceutical and biochemical areas,were conveniently synthesized in moderate to excellent yields.

关键词： Ball-milling Diels-Alder reaction Phosphotungstic acid Tetraliydroquinoline

N-doped graphene quantum dot-decorated N-TiO2/P-doped porous hollow g-C_(3)N_(4) nanotube composite photocatalysts for antibiotic photodegradation and H2 production

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingshu Yuan Yao zhang Xiaoyan zhang Junjie zhang Shen’gen zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao SAR 820000China

Exclusive responsiveness to ultraviolet light (~3.2 eV) and high photogenerated charge recombination rate are the two primary drawbacks of pure TiO_(2). We combined N-doped graphene quantum dots (N-GQDs), morphology regulation, and heterojunction construction strategies to synthesize N-GQD/N-doped TiO_(2)/P-doped porous hollow g-C_(3)N_(4) nanotube (PCN) composite photocatalysts (denoted as G-TPCN). The optimal sample (G-TPCN doped with 0.1wt% N-GQD, denoted as 0.1% G-TPCN) exhibits significantly enhanced photoabsorption, which is attributed to the change in bandgap caused by elemental doping (P and N), the improved light-harvesting resulting from the tube structure, and the upconversion effect of N-GQDs. In addition, the internal charge separation and transfer capability of0.1% G-TPCN are dramatically boosted, and its carrier concentration is 3.7, 2.3, and 1.9 times that of N-TiO_(2), PCN, and N-TiO_(2)/PCN(TPCN-1), respectively. This phenomenon is attributed to the formation of Z-scheme heterojunction between N-TiO_(2) and PCNs, the excellent electron conduction ability of N-GQDs, and the short transfer distance caused by the porous nanotube structure. Compared with those of N-TiO_(2), PCNs, and TPCN-1, the H2 production activity of 0.1%G-TPCN under visible light is enhanced by 12.4, 2.3, and 1.4times, respectively, and its ciprofloxacin (CIP) degradation rate is increased by 7.9, 5.7, and 2.9 times, respectively. The optimized performance benefits from excellent photoresponsiveness and improved carrier separation and migration efficiencies. Finally, the photocatalytic mechanism of 0.1% G-TPCN and five possible degradation pathways of CIP are proposed. This study clarifies the mechanism of multiple modification strategies to synergistically improve the photocatalytic performance of 0.1% G-TPCN and provides a potential strategy for rationally designing novel photocatalysts for environmental remediation and solar energy conversion.

关键词： N-doped TiO_(2) N-doped graphene quantum dots P-doped g-C_(3)N_(4) porous hollow nanotube heterojunction photocatalysis

考虑既有地铁车站阻隔效应的基坑抽水致沉模型试验研究

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岩石力学与工程学报 2023年第10期42卷 2566-2577页

作者：曾超峰蔡钢朱龙张祖浩陈宏波薛秀丽龙四春罗桂军湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室湖南湘潭411201 湖南科技大学土木工程学院湖南湘潭411201 湖南科技大学地球科学与空间信息工程学院湖南湘潭411201 中国建筑第五工程局有限公司湖南长沙410011

城市既有地下结构可对地下水运动和土体运移产生阻隔效应,已有研究表明该阻隔效应或加剧、或减小抽水沉陷,而具体的规律与地下结构类型及其分布和所在位置有关。以坑外已有地铁车站结构的阻隔效应为例开展室内模型试验研究,通过在基坑-... 详细信息

城市既有地下结构可对地下水运动和土体运移产生阻隔效应,已有研究表明该阻隔效应或加剧、或减小抽水沉陷,而具体的规律与地下结构类型及其分布和所在位置有关。以坑外已有地铁车站结构的阻隔效应为例开展室内模型试验研究,通过在基坑-地层-车站结构物理模型中安装变形与应力传感器,全过程实时监控该条件下基坑抽水引起的坑外水位与水头变化、地面沉降、围挡侧移及其两侧水/土压力变化等,并将所有监测结果与同样抽水条件下坑外无地铁车站的模型试验结果进行对比,揭示地铁车站结构阻隔效应对基坑抽水致沉的影响机制。研究表明:在同样的基坑抽水设置和操作下,有阻隔效应时的基坑涌水量更小、坑内外最大水位降深和坑外地面沉降更大、围挡侧移更小。基坑设计中可考虑阻隔效应的影响而适当减少坑内抽水井数量以实现同样的基坑抽水效果,并应评估阻隔效应对基坑变形的影响从而得到更合理的基坑支护设计。

关键词：基坑工程基坑降水阻隔效应地铁车站水位降深基坑变形模型试验

Reversing free-electron transfer of sulfide cocatalyst for exceptional photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zhenyi zhang National Experimental Chemistry Teaching Center Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

Recently,Yu and co-workers deeply explore the potential impact of free electron transfer between co-catalysts and photocatalyst carriers on H_(2)evolution efficiency of active sites over MoS_(2+x).They pro-pose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S ***,this highlight not only discusses and summarizes the essences of electron reversal and the optimized H ad-sorption/desorption mechanism,but also emphasizes the significance of femtosecond transient absorp-tion spectroscopy(fs-TAS)and in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)for revealing charge transfer dynamics and *** anticipate that this highlight can disseminate a new per-spective on the roles of photocatalyst carriers in improving cocatalytic H_(2)-production kinetics.

关键词： Photocatalysis Cocatalyst Electron reversal Antibonding-orbital occupancy S–H bonds

Deep Guided Attention Network for Joint Denoising and Demosaicing in Real Image

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Chinese Journal of Electronics 2024年第1期33卷 303-312页

作者： Tao zhang Ying FU Jun zhang School of Computer Science and Technology Beijing Institute of Technology Advanced Reasearch Institute of Multidisciplinary Science Beijing Institute of Technology

Denoising(DN) and demosaicing(DM) are the first crucial stages in the image signal processing pipeline. Recently, researches pay more attention to solve DN and DM in a joint manner, which is an extremely undetermined inverse problem. Existing deep learning methods learn the desired prior on synthetic dataset, which limits the generalization of learned network to the real world data. Moreover, existing methods mainly focus on the raw data property of high green information sampling rate for DM, but occasionally exploit the high intensity and signalto-noise(SNR) of green channel. In this work, a deep guided attention network(DGAN) is presented for real image joint DN and DM(JDD), which considers both high SNR and high sampling rate of green information for DN and DM, respectively. To ease the training and fully exploit the data property of green channel, we first train DN and DM sub-networks sequentially and then learn them jointly, which can alleviate the error accumulation. Besides, in order to support the real image JDD, we collect paired raw clean RGB and noisy mosaic images to conduct a realistic dataset. The experimental results on real JDD dataset show the presented approach performs better than the state-of-the-art methods, in terms of both quantitative metrics and qualitative visualization.

关键词： Training Visualization Inverse problems Green products Noise reduction Pipelines Signal processing

Value Iteration-Based Cooperative Adaptive Optimal Control for Multi-Player Differential Games With Incomplete Information

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 690-697页

作者： Yun zhang Lulu zhang Yunze Cai the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240 the Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China

This paper presents a novel cooperative value iteration(VI)-based adaptive dynamic programming method for multi-player differential game models with a convergence *** players are divided into two groups in the learning process and adapt their policies *** method removes the dependence of admissible initial policies,which is one of the main drawbacks of the PI-based ***,this algorithm enables the players to adapt their control policies without full knowledge of others’ system parameters or control *** efficacy of our method is illustrated by three examples.

关键词： Adaptive dynamic programming incomplete information multi-player differential game value iteration

Host plant traits play a crucial role in shaping the composition of epiphytic microbiota in the arid desert,Northwest China

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Journal of Arid Land 2024年第5期16卷 699-724页

作者： zhang Jun zhang Yuanming zhang Qi State Key Laboratory of Desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Xinjiang Field Scientific Observation Research Station of Tianshan Wild Fruit Forest Ecosystem Yili Botanical GardenXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China College of Life Sciences Shihezi UniversityShihezi 832003China

Phyllosphere microorganisms are a crucial component of environmental microorganisms,highly influenced by host characteristics,and play a significant role in plant health and ***,the impact of host characteristics on shaping phyllosphere microbial communities of plants with different life forms remains *** high-throughput sequencing technology,this study analyzed the diversity and community composition of phyllosphere epiphytic microorganisms(e.g.,bacteria and fungi)of various plant life forms in the hinterland of the Gurbantunggut Desert,Northwest *** annotation of prokaryotic taxa(FAPROTAX)and fungi function guild(FUNGuild)were employed to assess the ecological functions of microorganisms and to investigate the role of stochastic and deterministic processes in shaping phyllosphere microbial *** showed a diverse array of phyllosphere epiphytic microorganisms in the desert plants,with Proteobacteria,Cyanobacteria,and Actinobacteriota dominating bacterial community,while Ascomycota and Basidiomycota were prevalent in fungal *** across different plant life forms highlighted distinct microbial communities,indicating strong filtering effects by plant *** prediction identified intracellular parasites(accounting for 27.44%of bacterial community abundance),chemoheterotrophy(10.12%),and phototrophy(17.41%)as the main functions of epiphytic bacteria on leaves of different life form *** prediction indicated that phyllosphere epiphytic fungi primarily served as Saprotrophs(81.77%),Pathotrophs(17.41%),and Symbiotrophs(0.82%).Co-occurrence network analysis demonstrated a predominance of positive correlations among different microbial ***-Crick dissimilarity index analysis revealed that deterministic processes predominantly influenced phyllosphere bacterial and fungal community *** partitioning analysis and random forest modeling suggested that pla

关键词： phyllosphere epiphytic bacteria phyllosphere epiphytic fungi community structure community diversity functional diversity plant life form plant functional traits