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Nickel(hydro)oxide/graphdiyne Catalysts for Efficient Oxygen Production Reaction

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Chemical Research in Chinese Universities 2021年第6期37卷 1268-1274页

作者： LUAN xiaoyu XUE Yurui Science Center for Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringInstitute of Frontier and Interdisciplinary ScienceShandong UniversityJinan250100P.R.China

The transition metal-based materials have been regarded as promising electrocatalysts for oxygen evolution reaction(OER).However,achieving higher efficiency is largely limited by the valence states of metal ***,different graphdiyne(GDY)-nickel composites were designed and synthesized[Ni(OH)_(2)/GDY,NiOOH/GDY,and NiO_(x)/GDY]as the electrocatalysts for *** NiO_(x)/GDY possessing the mixed valence states can drive the OER more efficiently than Ni(OH)_(2)/GDY and NiOOH/***_(x)/GDY gives the smallest overpotential of 310 mV at 10 mA/cm^(2) for OER,which is even superior to commercial RuO_(2)*** results reveal that not only the fast charge transfer induced by GDY but also the prominent roles of mixed Ni^(2+)/Ni^(3+) valence states boost the OER electrocatalytic *** presence of the mixed valence state was demonstrated to be helpful for the charge transfer,resulting in the enhancement of the catalytic *** work may provide a new direction to design and fabricate high-performance materials for OER and beyond.

关键词： Graphdiyne Carbon material Heterojunction catalyst Oxygen evolution reaction Water splitting

Sgo1 interacts with CENP-A to guide accurate chromosome segregation in mitosis

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Journal of Molecular Cell Biology 2023年第10期15卷 26-38页

作者： Fengge Wu Hameed Akbar Chunyue Wang Xiao Yuan Zhen Dou McKay Mullen Liwen Niu Liang Zhang Jianye zang Zhikai Wang Xuebiao Yao xiaoyu Song Xing Liu MOE Key Laboratory for Cellular Dynamics Center for Advanced Interdisciplinary Science and Biomedicine of Institute of Health and Medicine(IHM)University of Science and Technology of China School of Life SciencesHefei 230026China Anhui Key Laboratory for Cellular Dynamics and Chemical Biology Hefei National Center for Cross-disciplinary SciencesHefei 230027China Keck Center for Cellular Dynamics Morehouse School of MedicineAtlantaGA 30310USA

Shugoshin-1(Sgo1)is necessary for maintaining sister centromere cohesion and ensuring accurate chromosome segregation during *** has been reported that the localization of Sgo1 at the centromere is dependent on Bub1-mediated phosphorylation of histone H2A at ***,it remains uncertain whether other centromeric proteins play a role in regulating the localization and function of Sgo1 during ***,we show that CENP-A interacts with Sgo1 and determines the localization of Sgo1 to the centromere during *** biochemical characterization revealed that lysine and arginine residues in the C-terminal domain of Sgo1 are critical for binding ***,the replacement of these basic amino acids with acidic amino acids perturbed the localization of Sgo1 and Aurora B to the centromere,resulting in aberrant chromosome segregation and premature chromatid *** together,these findings reveal a previously unrecognized but direct link between Sgo1 and CENP-A in centromere plasticity control and illustrate how the Sgo1–CENP-A interaction guides accurate cell division.

关键词： mitosis centromere kinetochore Sgo1 CENP-A Aurora B

Damage and failure characteristics of rock similar materials with pre-existing cracks

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International Journal of Coal Science & Technology 2019年第4期6卷 505-517页

作者： xiaoyu Cheng China Coal Energy Research Institute Co. Ltd.Xi'an 710054People's Republic of China

In order to further study the damage and failure mechanism for rock similar materials,this study investigated the mechanical properties and failure characteristics,law of damage space development,and damage evolution characteristics for rock similar materials with pre-existing cracks of varying length under uniaxial compression *** equipment used in this study is the self-developed YYW-Ⅱ strain controlled unconfined compression apparatus and the PCIE-8 acoustic emission monitoring *** show that,as the length of pre-existing crack increases:(1) the peak and residual strength reduces,and the peak axial strain and the strain during the initial compression phase increases;(2) the major failure mode is changed from shear failure to tensile failure along a vertical plane that passes the middle of the pre-existing crack;(3) The damage increases during the stable and accelerated development stage,and the effect of the pre-existing cracks is more during the accelerated development stage than the stable development stage.

关键词： Pre-existing cracks Rock similar materials Mechanical properties Acoustic emission localization Damage evolution

Fabrication of Core-Shell Hydrogel Bead Based on Sodium Alginate and Chitosan for Methylene Blue Adsorption

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Journal of Renewable Materials 2024年第4期12卷 815-826页

作者： xiaoyu Chen School of Material Engineering Jinling Institute of TechnologyNanjing211169China

A novel core-shell hydrogel bead was fabricated for effective removal of methylene blue dye from aqueous *** core,made of sodium alginate-g-polyacrylamide and attapulgite nanofibers,was cross-linked by Calcium ions(Ca^(2+)).The shell,composed of a chitosan/activated carbon mixture,was then coated onto the *** transform infrared spectroscopy confirmed the grafting polymerization of acrylamide onto sodium *** electron microscopy images showed the core-shell *** core exhibited a high water uptake ratio,facilitating the diffusion of methylene blue into the *** the diffusion process,the methylene blue was first adsorbed by the shell and then further adsorbed by the *** tests showed that the coreshell structure had a larger adsorption capacity than the core *** shell effectively enhanced the adsorption capacity to methylene blue compared to the single *** blue was adsorbed by activated carbon and chitosan in the shell,and the residual methylene blue diffused into the core and was further adsorbed.

关键词： Core-shell structure hydrogel bead attapulgite nanofiber sodium alginate polyacrylamide methylene blue adsorption material

Improvement of charge-transfer kinetics via MXene and cobalt containing polyoxometalate loading on CdS for photocatalytic hydrogen production

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Science China Chemistry 2024年

作者： Yu Feng Xiao Fang Jinnuo zang Bin Song Chunlian Hu xiaoyu Dong Yong Ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Advanced Catalysis of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

Hydrogen is a renewable and clean energy,and photocatalytic water splitting for hydrogen evolution technology is a promising technical means to solve the development *** this study,the ternary composite Co8POM@MXene–CdS hybrid catalyst was constructed and used for photocatalytic hydrogen *** the condition of AM 1.5G simulated sunlight,the photocatalytic H2evolution rate of the ternary composite was 8.13 mmol g-1h-1,which was more than 25 times higher than that of the bare *** means of synchronous illumination X-ray photoelectron spectroscopy （SI-XPS） and density functional theory （DFT） calculations,it was proved that the loading of MXene and Co8POM improved the photogenerated carrier separation and immigration efficiency on *** photogenerated electrons transfer from CdS to ***8POM containing the{Co4O3}quasi-cubane,as an oxidation co-catalyst,accepts photogenerated holes from CdS to catalyze the oxidation reaction of TEOA,which improves the photocatalytic hydrogen production activity and the stability of CdS.

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Room temperature ferromagnetic property of Fe-Y(Fe:Y-6.5) composite oxide nano-cluster via an extremely easy and scalable method

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Journal of Rare Earths 2021年第6期39卷 696-702,I0004页

作者： Yi Sui xiaoyu Liu Changsheng Liu School of Materials Science and Engineering Northeastern UniversityShenyang 110004China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

A novel Fe-Y composite oxide(Fe:Y-6.5) nanocluster was synthesized by self-assembly *** α-Fe_(2)O_(3) and cubic-Y_(2)O_(3) nanocrystalline with diameter around 10 nm are homogeneously assembled to form a cluster architecture which are constituted of Fe6.5Y composite oxide *** oxygen vacancies are introduced with cubic-Y_(2)O_(3),and the oxygen vacancies as Fe^(3+)-V_(0)-Y^(3+) between α-Fe_(2)O_(3) and cubic-Y_(2)O_(3) nanocrystalline are generated by self-assembly *** hysteresis loops recorded by vibrating sample magnetometry at 273 K display a ferromagnetic order,related to the fact that Fe^(3+)-V_(o)-Y^(3+) act as defect centers in the bound magnetic polaron model for Fe-Y composite oxide *** ferromagnetic prope rties are proportional to oxygen vacancy co ntents,and maximum magnetization(M_(m)) value of the nano-cluster reaches 5.14 A·m^(2)/g.

关键词： Room temperature ferromagnetism Fe-Y oxide nano-cluster Self-assembly Oxygen vacancy Rare earths

Distributed Gradient Tracking Methods with Finite Data Rates

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Journal of Systems Science & Complexity 2021年第5期34卷 1927-1952页

作者： MA xiaoyu YI Peng CHEN Jie Department of Control Science and Engineering Tongji UniversityShanghai 200082China. Shanghai Research Institute for Intelligent Autonomous Systems Tongji UniversityShanghai 200082China

This paper studies the distributed optimization problem over an undirected connected graph subject to digital communications with a finite data rate,where each agent holds a strongly convex and smooth cost *** agents need to cooperatively minimize the average of all agents’cost *** agent builds an encoder/decoder pair that produces transmitted messages to its neighbors with a finite-level uniform quantizer,and recovers its neighbors’states by a recursive decoder with received quantized *** the adaptive encoder/decoder scheme with the gradient tracking method,the authors propose a distributed quantized *** authors prove that the optimization can be achieved at a linear rate,even when agents communicate at 1-bit data *** examples are also conducted to illustrate theoretical results.

关键词： Distributed optimization gradient tracking method quantization

DQN-based decentralized multi-agent JSAP resource allocation for UAV swarm communication

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Journal of Systems Engineering and Electronics 2023年第2期34卷 289-298页

作者： LI Jie DANG xiaoyu LI Sai College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

It is essential to maximize capacity while satisfying the transmission time delay of unmanned aerial vehicle(UAV)swarm communication *** order to address this challenge,a dynamic decentralized optimization mechanism is presented for the realization of joint spectrum and power(JSAP)resource allocation based on deep Q-learning networks(DQNs).Each UAV to UAV(U2U)link is regarded as an agent that is capable of identifying the optimal spectrum and power to communicate with one *** convolutional neural network,target network,and experience replay are adopted while *** findings of the simulation indicate that the proposed method has the potential to improve both communication capacity and probability of successful data transmission when compared with random centralized assignment and multichannel access methods.

关键词： joint spectrum and power(JSAP) unmanned aerial vehicle(UAV)swarm communication deep Q-learning network(DQN) UAV to UAV(U2U)

The Fanconi anemia pathway and DNA interstrand cross-link repair

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Protein & Cell 2011年第9期2卷 704-711页

作者： xiaoyu Su Jun Huang Life Sciences Institute Zhejiang UniversityHangzhou 310058China

Fanconi anemia(FA)is an autosomal or X-linked recessive disorder characterized by chromosomal instability,bone marrow failure,cancer susceptibility,and a profound sensitivity to agents that produce DNA interstrand cross-link(ICL).To date,15 genes have been identified that,when mutated,result in FA or an FA-like *** is believed that cellular resistance to DNA interstrand cross-linking agents requires all 15 FA or FAlike ***,we review our current understanding of how these FA proteins participate in ICL repair and discuss the molecular mechanisms that regulate the FA pathway to maintain genome stability.

关键词： Fanconi anemia DNA interstrand crosslink repair FANCD2-FANCI mono-ubiquitylation chromosomal instability