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A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： wenbo wang Ruifeng Xu Xu Zhang Peiyu wang Bao Yang Bingjun Yang Juan Yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Hydrogen evolution reaction

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Attacking Open SSL ECDSA with a small amount of side-channel information

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Science China(Information Sciences) 2018年第3期61卷 57-70页

作者： wenbo wang Shuqin FAN Luoyang University of Foreign Languages State Key Laboratory of Cryptology

In this work, we mount a lattice attack on the ECDSA signatures implemented by the latest version of Open SSL which uses the windowed non-adjacent form method to implement the scalar multiplication. We first develop a new way of extracting information from the side-channel results of the ECDSA signatures. Just given a small fraction of the information about a side-channel result denoted as double-andadd chain, we take advantage of the length of the chain together with positions of two non-zero digits to recover information about the ephemeral key. Combining the information of both the most significant digits and the least significant bits, we are able to gain more information about the ephemeral key. The problem of recovering ECDSA secret key is then translated to the hidden number problem which can be solved by lattice reduction algorithms. Our attack is mounted to the secp256 k1 curve, and the result shows that 85 signatures would be enough to recover the secret key, which is better than the result that previous attack gained only utilizing the information extracted from the least significant bits, using about 200 signatures to recover the secret key.

关键词： ECDSA Open SSL lattice attack windowed non-adjacent form hidden number problem Flush+Reload attack

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Highly effective removal of Methylene Blue using functionalized attapulgite via hydrothermal process

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Journal of Environmental Sciences 2015年第7期27卷 106-115页

作者： Zhifang Zhang wenbo wang Aiqin wang Center of Eco-materials and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of the Chinese Academy of Sciences R&D Center of Xuyi Attapulgite Applied Technology Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

Attapulgite（APT） has been frequently used for the adsorptive removal of dyes from aqueous solution owing to its unique one-dimensional nanoscale structure and low-cost, abundant,eco-friendly advantages. In this work, APT was functionalized under mild hydrothermal condition using chloroacetic acid（CA） with ／COOH functional groups to improve its adsorption properties. The effect of hydrothermal modification on the microstructure and physicochemical features of APT was investigated by Fourier transform infrared spectroscopy, X-ray diffraction and Field-emission scanning electron microscopy analyses. The effects of hydrothermal reaction parameters on the adsorption properties of modified APT were intensively investigated. It was revealed that the rearrangement of crystal structure and the surface functionalization of APT with ／COOH groups cause the surprising increase of adsorption capability for Methylene Blue（MB）. The removal ratio of raw APT for MB is only 59.52%, while modified APT could almost completely remove MB in the 200 mg/L of MB solution with a removal ratio of 99.8%. The adsorption kinetics fitted pseudo second-order kinetic model, and the adsorption isotherm could be described with Langmuir isotherm model very well. The hydrogen-bonding interaction, electrostatic attraction and chemical association are the main driving force for the adsorption process.

关键词： Attapulgite Hydrothermal Chloroacetic acid Methylene Blue Adsorption

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Preparation of porous adsorbent via Pickering emulsion template for water treatment: A review

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Journal of Environmental Sciences 2020年第2期32卷 217-236页

作者： Yongfeng Zhu wenbo wang Hui Yu Aiqin wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Porous materials as emerging potential adsorbents have received much more attention because they are capable of capturing various pollutants with fast adsorption rate, high adsorption capacity, good selectivity and excellent *** order to prepare porous materials with decent porous structure, Pickering emulsion template method has been proved to be one of the most effective technologies to create pore *** paper reviewed comprehensively the latest research progress on the preparation of porous materials from various Pickering emulsions and their applications in the decontamination of pollutants(e.g., heavy metal ions, organic pollutants) and in the oil/water *** was expected that the summaries and discussions in this review will provide insights into the design and fabrication of new efficient porous adsorbents, and also give us a better understanding of the subject.

关键词： Pickering emulsion Porous material Soft template Water treatment

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Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet

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Journal of Environmental Sciences 2016年第3期28卷 33-43页

作者： Guangyan Tian wenbo wang Yuru Kang Aiqin wang Center for Eco-material and Green Chemistry Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of the Chinese Academy of Sciences Beijing 100049China R&D Center of Xuyi Palygorskite Applied Technology Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesXuyi 211700China

Herein,palygorskite（PAL）was activated via a simple hydrothermal process in the presence of ammonium sulfide,and the effects of activation on the microstructure,physico-chemical feature and adsorption behaviors of PAL were intensively *** hydrothermal process evidently improved the dispersion of PAL crystal bundles,increased surface negative charges and built more active –Si–O-groups served as the new＂adsorption sites＂.The adsorption property of the activated PAL for Methyl Violet（MV）was systematically investigated by optimizing the adsorption variables,including p H,ionic strength,contact time and initial MV *** activated PAL exhibited a superior adsorption capability to the raw PAL for the removal of MV（from 156.05 to 218.11 mg/g）.The kinetics for MV adsorption followed pseudo second-order kinetic models,while the isotherm and thermodynamics results showed that the adsorption pattern well followed the Langmuir *** structure analysis of PAL before and after adsorption demonstrated that electrostatic interaction and chemical association of –X–O-are the prominent driving forces for the adsorption process.

关键词： Palygorskite Hydrothermal Adsorption Methyl violet

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Deep Reinforcement Learning-Based Collaborative Routing Algorithm for Clustered MANETs

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China Communications 2023年第3期20卷 185-200页

作者： Zexu Li Yong Li wenbo wang China Telecom Research Institute Beijing 102209China Key Laboratory of Universal Wireless Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

Flexible adaptation to differentiated quality of service(QoS)is quite important for future 6G network with a variety of *** ad hoc networks(MANETs)are able to provide flexible communication services to users through self-configuration and rapid ***,the dynamic wireless environment,the limited resources,and complex QoS requirements have presented great challenges for network routing *** by the development of artificial intelligence,a deep reinforcement learning-based collaborative routing(DRLCR)algorithm is *** routing policy and subchannel allocation are considered jointly,aiming at minimizing the end-to-end(E2E)delay and improving the network *** sufficient training by the cluster head node,the Q-network can be synchronized to each member node to select the next hop based on local ***,we improve the performance of training by considering historical observations,which can improve the adaptability of routing policies to dynamic *** results show that the proposed DRLCR algorithm outperforms other algorithms in terms of resource utilization and E2E delay by optimizing network load to avoid *** addition,the effectiveness of the routing policy in a dynamic environment is verified.

关键词： artificial intelligence deep reinforcement learning collaborative routing MANETs 6G

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Joint Beam Scheduling and Power Optimization for Beam Hopping LEO Satellite Systems

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China Communications 2024年第10期21卷 226-239页

作者： Zheng Shuang Zhang Xing wang Peng wang wenbo Key Laboratory of Universal Wireless Communication Ministry of EducationSchool of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China

Low earth orbit(LEO) satellite communications can provide ubiquitous and reliable services,making it an essential part of the Internet of Everything network. Beam hopping(BH) is an emerging technology for effectively addressing the issue of low resource utilization caused by the non-uniform spatio-temporal distribution of traffic demands. However, how to allocate multi-dimensional resources in a timely and efficient way for the highly dynamic LEO satellite systems remains a challenge. This paper proposes a joint beam scheduling and power optimization beam hopping(JBSPO-BH) algorithm considering the differences in the geographic distribution of sink nodes. The JBSPO-BH algorithm decouples the original problem into two sub-problems. The beam scheduling problem is modelled as a potential game,and the Nash equilibrium(NE) point is obtained as the beam scheduling strategy. Moreover, the penalty function interior point method is applied to optimize the power allocation. Simulation results show that the JBSPO-BH algorithm has low time complexity and fast convergence and achieves better performance both in throughput and fairness. Compared with greedybased BH, greedy-based BH with the power optimization, round-robin BH, Max-SINR BH and satellite resource allocation algorithm, the throughput of the proposed algorithm is improved by 44.99%, 20.79%,156.06%, 15.39% and 8.17%, respectively.

关键词： beam hopping interior point method potential game resource allocation

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Controllable Synthesis of Au NRs and Its Flexible SERS Optical Fiber Probe with High Sensitivity

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Journal of Wuhan University of Technology(Materials Science) 2024年第1期39卷 7-16页

作者：熊文豪 wang wenbo LONG Yuting 李宏 State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China National 111 Research Center Microelectronics and Integrated Circuits School of ScienceHubei University of TechnologyWuhan 430068China

The surface-enhanced Raman scattering(SERS) optical fiber probes were successfully prepared by self-assembling on polyelectrolyte multilayers. Gold nanorods(Au NRs) were used as SERS enhancement material to give excellent biological affinity and stability to the SERS optical fiber probes. Au NRs were synthesized by seed growth method. The synergistic effect between AgNO_(3) and surfactant was investigated, and the highest yield was found when AgNO_(3) was 500 uL. Meanwhile, different SERS optical fiber probes were obtained by selecting silane coupling agent, polyelectrolyte multilayer and graphene oxide(GO) to treat quartz fiber. It was found that the SERS optical fiber probes obtained by the self-assembled on polyelectrolyte multilayers method performed better than those by other methods. In addition, Mapping was combined with finite element simulation to analyze the electromagnetic field distribution at the fiber end *** electromagnetic field distribution of Au NRs was investigated, the difference of electromagnetic field intensity around the Au NRs with different arrangements was compared, the strongest signal was obtained when the Au NRs were head-to-head. Finally, sensitivity of the optimized SERS optical fiber probes could reach 10^(-9)mol/L, with excellent stability and repeatability.

关键词： surface-enhanced Raman scattering(SERS) optical fiber probe gold nanorods(Au NRs) polyelectrolyte multilayers controllable synthesis

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Recovery and reuse of floc sludge for high-performance capacitors

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 133-144页

作者： Di Zhang Rong Hou wenbo wang He Zhao Beijing Engineering Research Center of Process Pollution Control CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In this paper,floc sludge was transformed into porous carbon matrix composites by acidification and KOH activation at high temperature and used as an electrode material for application in *** effects of different treatment processes on the electrochemical properties of sludge materials were *** results of electrochemical tests showed that the sludge electrode exhibited excellent energy storage performance after HNO3 acidification and KOH activation with a mass ratio of 3:1(KOH/C).The specific capacitance of the sludge electrode reached 287 F/g at a current density of 1 A/*** addition,the sludge electrode material showed excellent cycle stability(specific capacity retained at 93.4%after 5000 cycles at 5 A/g).Based on XRD,FTIR,SEM,TEM,and BET surface analysis,the morphology of sludge electrode materials can be effectively regulated by chemical *** best-performing material showed a 3D porous morphology with a large specific surface area(2588 m^(2)/g)and optimal pore size distribution,improving ion channels and charge *** to the life cycle assessment of floc sludge utilization,it reduced the resource consumption and toxicity risk by more than 90%compared with ordinary sludge disposal *** work provided a cost-effective and eco-friendly sludge reuse method and demonstrated the application potential of sludge-based materials in high-performance supercapacitors.

关键词： Floc sludge Porous carbon electrode Energy storage performance Supercapacitors

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Experimental Study on the Mechanical Performance of Mortise-Tenon Joints Reinforced with Replaceable Flat-Steel Jackets

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Journal of Renewable Materials 2021年第6期9卷 1111-1125页

作者： Hongmin Li Hongxing Qiu wenbo wang Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210037China Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education Southeast UniversityNanjing210096China Guangdong Architectural Design Research Institute Co. Ltd.Guangzhou510000China

The mortise-tenon joint is an important hub transmitting and distributing external loads for load-bearing components(beams,columns et al.)in the ancient-timber frame structure ***,the conventional steel hoop reinforcement methods often insert wood screws into the timber *** the reinforced joint rotates greatly,the anchoring failure of the screws will cause damage to the timber *** solve this problem,this study proposes a detachable and replaceable non-destructive flat-steel jacket reinforcement method in which horizontal flat steel is placed in the center of the joint,and the bolt is extended to the outside of the timber *** 1:3.52 scaled straight-tenon joint specimens were subjected to monotonic loading of beam ends,including three unreinforced reference joints,three joints with flat-steel jacket and three carbon fiber-reinforced plastic(CFRP)reinforced *** mechanical behaviors of the novel joints with flat-steel jacket were experimentally studied by comparing with those of the joints without strengthening and retrofitted with CFRP,based on the failure modes,the initial stiffness,the ultimate bearing capacity,and the moment-rotation relationship *** indicated that the mortise-tenon joints reinforced with flat-steel jackets maintain the original semi-rigid properties of the unreinforced mortise-tenon joints and can effectively prevent the tenon from pulling *** initial stiffness and ultimate bearing capacity were improved *** column and beam of the reinforced joints remain intact providing the reference for the practical application of joints *** mortisetenon joints reinforced with CFRP lose the semi-rigid properties of the unreinforced tenon-mortise *** joints reinforced with CFRP have the largest initial stiffness,while the unreinforced joints have the lowest *** initial stiffness of the proposed joint is in between the joints reinforced with CFRP and unreinforced joint

关键词： Mortise-tenon joints replaceable flat-steel jacket FRP relationship between moment and rotation amount of tenon pulled out

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