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| 1 | Solvent-Free Synthesis of Ultrafine Tungsten Carbide Nanoparticles-Decorated Carbon Nanosheets for Microwave Absorption显示文摘Carbides/carbon composites are emerging as a new kind of binary dielectric systems with good microwave absorption performance.Herein,we obtain a series of tungsten carbide/carbon composites through a simple solvent-free strategy,where the solid mixture of dicyandiamide(DCA)and ammonium metatungstate(AM)is employed as the precursor.Ultrafine cubic WC1-x nanoparticles(3-4 nm)are in situ generated and uniformly dispersed on carbon nanosheets.This configuration overcomes some disadvantages of conventional carbides/carbon composites and is greatly helpful for electromagnetic dissipation.It is found that the weight ratio of DCA to AM can regulate chemical composition of these composites,while less impact on the average size of WC1-x nanoparticles.With the increase in carbon nanosheets,the relative complex permittivity and dielectric loss ability are constantly enhanced through conductive loss and polarization relaxation.The different dielectric properties endow these composites with distinguishable attenuation ability and impedance matching.When DCA/AM weight ratio is 6.0,the optimized composite can produce good microwave absorption performance,whose strongest reflection loss intensity reaches up to-55.6 dB at 17.5 GHz and qualified absorption bandwidth covers 3.6-18.0 GHz by manipulating the thickness from 1.0 to 5.0 mm.Such a performance is superior to many conventional carbides/carbon composites. | Yunlong Lian Binhua Han Dawei Liu Yahui Wang Honghong Zhao Ping Xu Xijiang Han Yunchen Du | 2020 | Nano-Micro Letters2020，12，11： | 7 |
| 2 | Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers:A Review显示文摘Magnetic carbon-based composites are the most attractive candidates for electromagnetic(EM)absorption because they can terminate the propagation of surplus EM waves in space by interacting with both electric and magnetic branches.Metal-organic frameworks(MOFs)have demonstrated their great potential as sacrificing precursors of magnetic metals/carbon composites,because they provide a good platform to achieve high dispersion of magnetic nanoparticles in carbon matrix.Nevertheless,the chemical composition and microstructure of these composites are always highly dependent on their precursors and cannot promise an optimal EM state favorable for EM absorption,which more or less discount the superiority of MOFs-derived strategy.It is hence of great importance to develop some accompanied methods that can regulate EM properties of MOFs-derived magnetic carbon-based composites e ectively.This review comprehensively introduces recent advancements on EM absorption enhancement in MOFs-derived magnetic carbon-based composites and some available strategies therein.In addition,some challenges and prospects are also proposed to indicate the pending issues on performance breakthrough and mechanism exploration in the related field. | Honghong Zhao Fengyuan Wang Liru Cui Xianzhu Xu Xijiang Han Yunchen Du | 2021 | Nano-Micro Letters2021，13，12： | 6 |
| 3 | Advances in core–shell engineering of carbon-based composites for electromagnetic wave absorption显示文摘Electromagnetic(EM)absorption is paving the way to overcome the challenges related to conventional shielding strategy against EM pollution through sustainable energy dissipation.As characteristic functional media that can interact with electric or magnetic field branch,EM wave absorption materials(EWAMs)have received extensive attention and realized considerable development in the past two decades,where carbon-based composites are always considered as promising candidates for high-performance EMAWs due to their synergetic loss mechanism as well as diversified composition and microstructure design.Recent progress indicates that there is more and more interest in the fabrication of carbon-based composites with unique core–shell configuration.On one hand,core–shell configuration usually ensures good chemical homogeneity of final products and provides some positive protections for the components with susceptibility to corrosion,on the other hand,it creates enough heterogeneous interfaces between different EM components,which may bring enhanced polarization effect and intensify the consumption of EM energy.In this review,we firstly introduce EM wave absorption theory,and then highlight the advances of core–shell engineering in carbonbased composites in terms of built-in carbon cores and built-out carbon shells.Moreover,we also show some special core–shell carbon-based composites,including carbon/carbon composites,assembled composites,and decorated composites.After analyzing EM absorption performance of some representative composites,we further propose some challenges and perspectives on the development of core–shell carbon-based composites. | Lixue Gai Honghong Zhao Fengyuan Wang Pan Wang Yonglei Liu Xijiang Han Yunchen Du | 2022 | Nano Research2022，15，10： | 5 |
| 4 | Conjugated polymer-mediated synthesis of sulfur- and nitrogen-doped carbon nanotubes as efficient anode materials for sodium ion batteries显示文摘 | Yanzhen He Xijiang Han Yunchen Du Bo Song Bin Zhang Wei Zhang Ping Xu | 2018 | Nano Research2018，11，5： | 4 |
| 5 | Reduced graphene oxide aerogel decorated with Mo_(2)C nanoparticles toward multifunctional properties of hydrophobicity,thermal insulation and microwave absorption显示文摘Reduced graphene oxide(rGO)aerogels are emerging as very attractive scaffolds for high-performance electromagnetic wave absorption materials(EWAMs)due to their intrinsic conductive networks and intricate interior microstructure,as well as good compatibility with other electromagnetic(EM)components.Herein,we realized the decoration of rGO aerogel with Mo_(2)C nanoparticles by sequential hydrothermal assembly,freeze-drying,and high-temperature pyrolysis.Results show that Mo_(2)C nanoparticle loading can be easily controlled by the ammonium molybdate to glucose molar ratio.The hydrophobicity and thermal insulation of the rGO aerogel are effectively improved upon the introduction of Mo_(2)C nanoparticles,and more importantly,these nanoparticles regulate the EM properties of the rGO aerogel to a large extent.Although more Mo_(2)C nanoparticles may decrease the overall attenuation ability of the rGO aerogel,they bring much better impedance matching.At a molar ratio of 1:1,a desirable balance between attenuation ability and impedance matching is observed.In this context,the Mo_(2)C/r GO aerogel displays strong reflection loss and broad response bandwidth,even with a small applied thickness(1.7 mm)and low filler loading(9.0wt%).The positive effects of Mo_(2)C nanoparticles on multifunctional properties may render Mo_(2)C/r GO aerogels promising candidates for high-performance EWAMs under harsh conditions. | Yahui Wang Minghui Zhang Xuesong Deng Zhigang Li Zongsheng Chen Jiaming Shi Xijiang Han Yunchen Du | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，3： | 2 |
| 6 | YPD-30, a prodrug of YPD-29B, is an oral small-molecule inhibitor targeting PD-L1 for the treatment of human cancer显示文摘PD-1 and PD-L1 antibodies have brought about extraordinary clinical benefits for cancer patients,and their indications are expanding incessantly.Currently,most PD-1/PD-L1 agents are administered intravenously,which may be uncomfortable for some cancer patients.Herein,we develop a novel oral-delivered small molecular,YPD-29B,which specifically targets human PD-L1.Our data suggested that YPD-29B could potently and selectively block the interaction between PD-L1 and PD-1,but did not inhibit any other immune checkpoints.Mechanistically,YPD-29B induced human PD-L1 dimerization and internalization,which subsequently activated T lymphocytes and therefore overcomes immunity tolerance in vitro.YDP-29B was modified as the YPD-30 prodrug to improve druggability.Using humanized mice with human PD-1 xenografts of human PD-L1 knock-in mouse MC38 cancer cells,we demonstrated that YPD-30 exhibited significant antitumor activity and was well tolerated in vivo.Taken together,our results indicate that YPD-30 serves as a promising therapeutic candidate for anti-human PD-L1 cancer immunotherapy. | Fangfang Lai Ming Ji Lei Huang Yunchen Wang Nina Xue Tingting Du Kai Dong Xiaoqing Yao Jing Jin Zhiqiang Feng Xiaoguang Chen | 2022 | Acta Pharmaceutica Sinica B2022，12，6： | 1 |
| 7 | The electromagnetic properties and microwave absorption of mesoporous carbon显示文摘 | Du Yunchen Liu Tao Yu Bin | 2012 | Mater Chem Phys2012，135，23： | 1 |
| 8 | Polymer-bubbling for one-step synthesis of three-dimensional cobalt/carbon foams against electromagnetic pollution显示文摘Constructing three-dimensional(3D)foam-like structure in magnetic metal/carbon composites is regarded as a promising pathway to reinforce their electromagnetic(EM)functions.Herein,a nitrateassisted polymer-bubbling strategy is reported for the synthesis of Co/carbon foams,which is simply accomplished by direct pyrolyzing the mixture of polyvinylpyrrolidone(PVP)and cobalt nitrate hexahydrate(Co(NO_(3))_(2)·6 H_(2) O).Co(NO_(3))_(2)·6H_(2)O not only plays as the source of Co nanoparticles,but also accounts for the formation of 3D microstructure through releasing gas.By manipulating the weight ratio of Co(NO_(3))_(2)·6H_(2)O to PVP,the chemical composition,microstructure,and EM properties of these composites can be easily regulated.When the weight ratio reaches 1.5,the resultant composite displays good microwave absorption performance,whose reflection loss intensity and effective absorption bandwidth are superior to those of many common Co/C composites.EM analysis reveals that such architecture is greatly helpful to establish cross-linked conductive networks in the wax matrix,resulting in powerful dielectric loss under low absorber loading.Meanwhile,3D microstructure is also beneficial for multiple reflections that equal to extend the transmission path of incident EM waves.Simple synthesis strategy and desirable properties of these magnetic carbon foams may render them as the low-cost substitute of 3D graphene for the application against EM pollution. | Fengyuan Wang Ping Xu Ning Shi Liru Cui Yahui Wang Dawei Liu Honghong Zhao Xijiang Han Yunchen Du | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 9 | Sol- vent - free preparation of nanosized sulfated zirconia with Brcsted acidic sites from a simple calcination 显示文摘 | SUN Yinyong MA Shengqian DU Yunchen | 2005 | Phys Chem B2005，109，7： | 1 |
| 10 | Solvent-free preparation of nanosized sulfated zirconia with Brφsted acidic sites from a simple calcination显示文摘 | SUN Yinyong MA Shengqian DU Yunchen | 2005 | J Phys Chem B2005，109，7： | 1 |
| 11 | Ordered mesoporous silica materials (SBA-15) with good heat-resistant magnetism显示文摘 | Yunchen Du Sen Liu Yanyan Ji Yonglai Zhang Ni Xiao Feng-Shou Xiao | 2008 | Journal of Magnetism and Magnetic Materials2008，，： | 1 |
| 12 | Shell thickness-dependent microwave absorption of core-shell Fe304@C composites显示文摘 | Du Yunchen Liu Wenwen Qiang Rong | 2014 | Applied Materials &Interfaces2014，6，12： | 1 |
| 13 | Emergent leader-follower relationship in networked multiagent systems显示文摘Understanding the collective dynamics of leader-follower systems is a crucial and challenging issue.Previous studies have a priori designated leaders.However,the leaderfollower relationship is self-organized in human society over time and social interactions[1]. | Jinzhuo LIU Chenyou FAN Yunchen PENG Jinze DU Zhen WANG Chen CHU | 2023 | Science China(Information Sciences)2023，66，12： | 0 |
| 14 | Magnetic field‐enhanced water splitting enabled by bifunctional molybdenum‐doped nickel sulfide on nickel foam显示文摘Herein,we report bifunctional molybdenum-doped nickel sulfide on nickel foam(Mo-NiS_(x)/NF)for magnetic field-enhanced overall water splitting under alkaline conditions.Proper doping of Mo can lead to optimization of the electronic structure of NiS_(x),which accelerates the dissociation of H2O and the adsorption of OH−in the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER)processes,respectively.In addition,the magnetically active Mo-NiS_(x)/NF can further enhance the HER and OER activity under an applied magnetic field due to the magnetoresistance effect and the ferromagnetic(FM)exchange-field penetration effect.As a result,Mo-NiS_(x)/NF requires low overpotentials of 307 mV at 50mA cm^(−2)(for OER)and 136 mV at 10mA cm^(−2)(for HER)under a magnetic field of 10000 G.Furthermore,the electrolytic cell constructed by the bifunctional Mo-NiS_(x)/NFs as both the cathode and the anode shows a low cell voltage of 1.594 V at 10 mA cm^(−2)with optimal stability over 60 h under the magnetic field.Simultaneous enhancement of the HER and OER processes by an external magnetic field through rational design of electrocatalysts might be promising for overall water splitting applications. | Yuanyuan Zhang Mengxin Chen Ping Guo Yunchen Du Bo Song Xianjie Wang Zaixing Jiang Ping Xu | 2023 | Carbon Energy2023，5，10： | 0 |
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