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| 1 | MXene-derived TiO_(2)nanosheets decorated with Ag nanoparticles for highly sensitive detection of ammonia at room temperature显示文摘Due to their large surface-to-volume ratio and low electronic noise,two-dimensional transition metal carbides(Ti_(3)C_(2)T_(x) MXene)and their derived transition metal oxides have demonstrated significant potential for use in high-precision gas sensing.However,the construction of high-sensitivity Ti_(3)C_(2)T_(x) MXene-based gas sensors operated at room temperature(RT)is still a major challenge.Herein,we demonstrate a sensitive nanocomposite prepared by uniformly anchoring silver nanoparticles(AgNPs)on Ti_(3)C_(2)T_(x) MXene-derived transition metal oxide(TiO_(2))nanosheets for high-sensitivity NH_(3) detection.AgNPs can not only serve as spacers to effectively prevent the restacking of MXene-derived TiO_(2)nanosheets and ensure an effective transmission highway for target gas molecules,but also enhance the sensitivity of the sensor through chemical and electronic sensitization.By integrating the unique merits of the individual components and the synergistic effects of the composites,the optimized Ag@TiO_(2)nanocomposite-based sensors revealed an extraordinary response value of 71.8 to 50 ppm NH_(3) at RT with a detection limit as low as 5 ppm.In addition,the Ag@TiO_(2)NH_(3) sensor also exhibits excellent selectivity and outstanding repeatability.This strategy provides an avenue for the development of MXene derivatives for advanced gas sensors. | Jie Wen Zihao Song Jiabao Ding Feihong Wang Hongpeng Li Jinyong Xu Chao Zhang | 2022 | Journal of Materials Science & Technology2022，，19： | 1 |
| 2 | Self-sustained catalytic combustion of CO enhanced by micro fluidized bed: stability operation, fluidization state and CFD simulation显示文摘A micro fluidized bed reactor was used to study the self-sustaining catalytic combustion of carbon monoxide(CO).The Cu_(1−x)Ce_(x)O_(y) catalyst,as well as the pure CuO and CeO_(2),are used to investigate the contributing mechanism of different active sites including dispersed CuO and Cu–Ce solid solutions.The ignition temperature(Ti)of CO over these catalysts at a flow rate of 2000 mL/min followed the order:74℃(Cu_(0.5)Ce_(0.5)O_(y))<75℃(Cu_(0.25)Ce_(0.75)O_(y))<84℃(Cu_(0.75)Ce_(0.25)O_(y))<105℃(CuO)<500℃(CeO_(2)).Furthermore,the lean combustion limits(equivalence ratioϕ)over these catalysts under the flow rates of 750–3000 mL/min(through fixed,bubbling,and fluidized bed)were also measured,which are Cu_(0.5)Ce_(0.5)O_(y) | Zirui Zhang Chenhang Zhang Huan Liu Feng Bin Xiaolin Wei Running Kang Shaohua Wu Wenming Yang Hongpeng Xu | 2023 | Frontiers of Environmental Science & Engineering2023，17，9： | 1 |
| 3 | Secure Transmission in Satellite-UAV Integrated System Against Eavesdropping and Jamming:A Two-Level Stackelberg Game Model显示文摘Aiming at the physical layer security(PLS)secure transmission existing in the information backhaul link of the satellite-UAV integrated(SUI)network,a two-layer Stackelberg game model(TSGM)that can resist full-duplex(FD)eavesdropping and jamming attacks is proposed.The confrontation relationship between the UAV network and the attacker is established as the first layer Stackelberg game.The source UAV adjusts its own transmission power strategy according to the attacker’s jamming strategy to resist malicious jamming attacks.The internal competition and cooperation relationship in UAV network is modeled as the second layer Stackelberg game,and the optimal cooperative UAV transmits jamming signal to the attacker to resist malicious eavesdropping attacks.Aiming at the“selfishness”of UAV nodes,a price incentive mechanism is established to encourage UAV to actively participate in cooperation,so as to maximize the advantages of cooperative communication.For the proposed TSGM,we construct the utility function and analyze the closed equilibrium solution of the game model,and design a three-stage optimal response iterative(TORI)algorithm to solve the game equilibrium.The simulation results show that the proposed TSGM can effectively increase the utility of the source UAV and improve the enthusiasm of cooperation compared with other power control models. | Chengjian Liao Kui Xu Hongpeng Zhu Xiaochen Xia Qiao Su Nan Sha | 2022 | China Communications2022，19，7： | 0 |
| 4 | AMAZING AUTUMN VIEWS IN BEIJING显示文摘In early autumn,Beijing is often bathed in serene rays of sunlight,delighting residents and visitors with attractive golden landscapes.Beginning in early autumn,Beijingers enjoy going outside to observe the beautiful changing colours of autumn leaves.Until the arrival of winter,Beijing residents will continue to visit urban parks and suburban forests to witness the beautiful red and golden colours of autumn. | Zhang Hongpeng(Translated) Brad Green He Rong(Photos) Li Bin(Photos) Liu Haixia(Photos) Shao Xu(Photos) Wang Jianzhong(Photos) Zhu Shengwei(Photos) | 2021 | Beijing2021，，44： | 0 |
| 5 | Static Force-Based Modeling and Parameter Estimation for a Deformable Link Composed of Passive Spherical Joints With Preload Forces显示文摘To balance the contradiction between higher flexibility and heavier load bearing capacity,we present a novel deformable manipulator which is composed of active rigid joints and deformable links.The deformable link is composed of passive spherical joints with preload forces between socket-ball surfaces.To estimate the load bearing capacity of a deformable link,we present a static force-based model of spherical joint with preload force and analyze the static force propagation in the deformable link.This yields an important result that the load bearing capacity of a spherical joint only depends on its radius,preload force,and static friction coefficient.We further develop a parameter estimation method to estimate the product of preload force and static friction coefficient.The experimental results validate our model.80.4%of percentage errors on the maximum payload mass prediction are below 15%. | Gaofeng Li Dezhen Song Lei Sun Shan Xu Hongpeng Wang Jingtai Liu | 2021 | IEEE/CAA Journal of Automatica Sinica2021，8，11： | 0 |
| 6 | REVITALISING OLD BEIJING显示文摘 | Zhang Hongpeng Brad Green Jin Jjianhui Sang Yi Xu Xiaoping Zhang Qi Zhao Yue | 2021 | Beijing2021，，40： | 0 |
| 7 | Enhancement in boiling heat transfer performance using reduced graphene oxide coating with controllable components and porous structures显示文摘Enhancement in boiling heat transfer performance is significant for addressing thermal management bottlenecks of advanced electronic systems.Reduced graphene oxides(rGO)are regarded as promising candidates for thermal management due to their excellent thermal properties,chemical stability and adjustable wettability.In this study,rGO coatings with micron pores and controllable oxygen contents are prepared on Al substrate via cathodic electrophoretic deposition and subsequent thermal annealing,leading to enhanced pool boiling performance.The heat transfer coefficient for Al/rGO450is 37.2 kW m-2K-1,which is increased by 112.6%compared with bare Al,also outperformed previously reported Al based substrates.It is assumed that the hydrophilic and aerophobic r GO coatings effectively promote the liquid infiltration and bubble departure during pool boiling process.Importantly,repeatability tests indicate the durable stability of vertically oriented rGO nanosheets.Reverse nonequilibrium molecular dynamics simulation indicates that the interfacial transmission coefficients of Al/rGO increase after thermal annealing,indicative of the enhanced heat transfer performance of heterogeneous interface.Our study opens a new avenue for endowing metal substrates with high pool boiling performance using porous carbon coating nanoengineering strategy with controllable morphology and components. | XU ZhiMing WANG XiaoLiang JIANG HongPeng ZHANG ZhiRong SHAN DeBin GUO Bin QIU YunFeng XU Jie | 2023 | Science China(Technological Sciences)2023，66，7： | 0 |
| 8 | In Situ High-Temperature Reaction-Induced Local Structural Dynamic Evolution of Single-Atom Pt on Oxide Support显示文摘The dynamic evolution of active site coordination structure during a high-temperature reaction is critically significant but often difficult for the research of efficient single-atom catalysts(SACs).Herein,we for the first time report the in situ activation behaviors of the local coordination structure of Pt single atoms(Pt_(1))during the high-temperature oxidation of light alkanes.The distinctly enhanced activity of the catalyst is attributed to the in situ evolved Pt_(1)−oxygen vacancy(Pt_(1)−OV)combination ensemble as an efficient and stable active site.Theoretical calculations reveal that the lattice oxygen adjacent to Pt_(1)and the H dissociated from CH4 constitute the lattice hydroxyl,which is the initial step in the formation of the Pt_(1)−OV combination.Pt_(1)and nearby unsaturated Mn can donate the charge back to O−O to promote the dissociation of O_(2).This work provides molecular-level insight into the in situ reaction-induced evolution of a single-atom coordination environment for designing efficient SACs under harsh conditions. | Dongxu Yan Yanxia Gao Ming-Yu Qi Hongpeng Jia Yi-Jun Xu | 2023 | Precision Chemistry2023，1，5： | 0 |
| 9 | Effect of Manganese on DNA-Protein Crosslinks of Testicle in Chicken显示文摘In order to explore the effect of manganese on DNA-protein crosslinks (DPC) of testicle in chicken. 500, 800, 1 700 mg · kg-1 MnCl2 were added to forage to establish the model of the sub-chronic manganese poisoning. After 30, 60 and 90 d, testicles were taken out to detect hydroxyl radical inhibiting capacity and DPC content. The results showed that compared with control group, hydroxyl radical inhibiting capacity significantly decreased and DPC content notably increased, and there was a time-dose relationship. It demonstrated that manganese could decrease the inhibitng capacity of hydroxyl radical, increase the content of hydroxyl and DPC, and induce DNA damage. | ZHANG Liming TANG Hongpeng GU Xijuan XU Shiwen | 2009 | Journal of Northeast Agricultural University(English Edition)2009，16，1： | 0 |
| 10 | Enabling rechargeable Li-MnO_(2) batteries using ether electrolytes显示文摘A low-carbon future demands more affordable batteries utilizing abundant elements with sustainable end-of-life battery management.Despite the economic and environmental advantages of Li-MnO_(2)batteries,their applica-tion so far has been largely constrained to primary batteries.Here,we demonstrate that one of the major limiting factors preventing the stable cycling of Li-MnO_(2)batteries,Mn dissolution,can be effectively mitigated by employing a common ether electrolyte,1 mol/L lithium bis(trifluorometha-nesulfonyl)imide(LiTFSI)in 1,3-dioxane(DOL)/1,2-dimethoxyethane(DME).We discover that the suppression of this dissolution enables highly reversible cycling of the MnO_(2)cathode regardless of the synthesized phase and morphology.Moreover,we find that both the LiPF_(6)salt and carbonate solvents present in conventional electrolytes are responsible for previous cycling challenges.The ether electrolyte,paired with MnO_(2)cathodes is able to demonstrate stable cycling performance at various rates,even at elevated temperature such as 60℃.Our discovery not only represents a defining step in Li-MnO_(2)batteries with extended life but provides design criteria of electrolytes for vast manganese-based cathodes in rechargeable batteries. | Dawei Xia Hongpeng Gao Mingqian Li John Holoubek Qizhang Yan Yijie Yin Panpan Xu Zheng Chen | 2023 | SmartMat2023，4，5： | 0 |
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