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| 1 | Observation and analysis of atmospheric volatile organic compounds in a typical petrochemical area in Yangtze River Delta, China显示文摘Volatile organic compounds(VOCs) are a kind of important precursors for ozone photochemical formation. In this study, VOCs were measured from November 5 th, 2013 to January 6 th, 2014 at the Second Jinshan Industrial Area, Shanghai, China. The results showed that the measured VOCs were dominated by alkanes(41.8%), followed by aromatics(20.1%), alkenes(17.9%), and halo-hydrocarbons(12.5%). The daily trend of the VOC concentration showed a bimodal feature due to the rush-hour traffic in the morning and at nightfall. Based on the VOC concentration, a receptor model of Positive Matrix Factorization(PMF) coupled with the information related to VOC sources was applied to identify the major VOC emissions. The result showed five major VOC sources: solvent use and industrial processes were responsible for about 30% of the ambient VOCs, followed by rubber chemical industrial emissions(23%), refinery and petrochemical industrial emissions(21%), fuel evaporations(13%) and vehicular emissions(13%). The contribution of generalized industrial emissions was about 74% and significantly higher than that made by vehicle exhaust. Using a propylene-equivalent method, alkenes displayed the highest concentration, followed by aromatics and alkanes. Based on a maximum incremental reactivity(MIR)method, the average hourly ozone formation potential(OFP) of VOCs is 220.49 ppbv. The most significant source for ozone chemical formation was identified to be rubber chemical industrial emissions, following one by vehicular emission. The data shown herein may provide useful information to develop effective VOC pollution control strategies in industrialized area. | Yunchen Zhang Rui Li Hongbo Fu Dong Zhou Jianmin Chen | 2018 | Journal of Environmental Sciences2018，30，9： | 21 |
| 2 | 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 |
| 3 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | Individual particle analysis of aerosols collected at Lhasa City in the Tibetan Plateau显示文摘To understand the composition and major sources of aerosol particles in Lhasa City on the Tibetan Plateau(TP), individual particles were collected from 2 February to 8 March, 2013 in Tibet University. The mean concentrations of both PM2.5and PM10 during the sampling were25.7 ± 21.7 and 57.2 ± 46.7 μg/m3, respectively, much lower than those of other cities in East and South Asia, but higher than those in the remote region in TP like Nam Co, indicating minor urban pollution. Combining the observations with the meteorological parameters and back trajectory analysis, it was concluded that local sources controlled the pollution during the sampling. Transmission electron microscopy(TEM) combined with energydispersive X-ray spectra(EDS) was used to study 408 particles sampled on four days. Based on the EDS analysis, a total of 8 different particle categories were classified for all 408 particles, including Si-rich, Ca-rich, soot, K-rich, Fe-rich, Pb-rich, Al-rich and other particles.The dominant elements were Si, Al and Ca, which were mainly attributed to mineral dust in the earth's crust such as feldspar and clay. Fe-, Pb-, K-, Al-rich particles and soot mainly originated from anthropogenic sources like firework combustion and biomass burning during the sampling. During the sampling, the pollution mainly came from mineral dust,while the celebration ceremony and religious ritual produced a large quantity of anthropogenic metal-bearing particles on 9 and 25 February 2013. Cement particles also had a minor influence. The data obtained in this study can be useful for developing pollution control strategies. | Bu Duo Yunchen Zhang Lingdong Kong Hongbo Fu Yunjie Hu Jianmin Chen Lin Li A.Qiong | 2015 | Journal of Environmental Sciences2015，27，3： | 4 |
| 7 | 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 |
| 8 | On Visual Similarity Based 3D Model Retrieval显示文摘 | Ding‐YunChen Xiao‐PeiTian Yu‐TeShen MingOuhyoung | 2003 | Computer Graphics Forum2003，，3： | 2 |
| 9 | Antioxidant and antiproliferative activities of red pitaya显示文摘 | Wu Lichen Hsu Hsiuwen Chen Yunchen | 2006 | Food Chemistry2006，95，2： | 1 |
| 10 | 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 |
| 11 | Photosynthetic aclima-tion in rice leaves to free-air CO2 enrichment related to both Ribulose-1,5-bisphosphate carboxylation limitation and Ribulose-1,5-bisphos-phate regeneration limitation显示文摘 | Gen Yunchen Zhen Huayong Yi Liao el al | 2005 | Plant and Cell Physiology2005，47，7： | 1 |
| 12 | A Variable Structure Control with Proportional and Integral Compensations for Electrohydraulc Position Servo Control System显示文摘 | Fung Rongfong Wang Yunchen Yang Ronglai | 1997 | Mechatronics1997，7，1： | 1 |
| 13 | 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 |
| 14 | Regional quantification of developing human cortical shape with a three‐dimensional surface‐based magnetic resonance imaging analysis in utero显示文摘 | Hui‐HsinHu Chih‐IHung Yu‐TeWu Hui‐YunChen Jen‐ChuenHsieh Wan‐YuoGuo | 2011 | European Journal of Neuroscience2011，，8： | 1 |
| 15 | 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 |
| 16 | Antioxidant andantiproliferative activities of red pitaya显示文摘 | WU Lichen HSU Hsiuwen CHEN Yunchen | 2006 | Food Chemistry2006，95，： | 1 |
| 17 | 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 |
| 18 | A novel seamless transferring control method for microgrid based on master-slave configuration real-time micro- grid power management and control with distributed agents 显示文摘 | Chen Xin Wang Yanhong Wang Yunchen | 2013 | IEEE Transaction on Smart Grid2013，4，1： | 1 |
| 19 | Altiosidant and anfiproliferative activities of red pitaya显示文摘 | Wu Lichen Hsu Hsiuwen Chen Yunchen | 2006 | Food Chemistr32006，95，2： | 1 |
| 20 | Antioxidant and antiproliferative activities of red pitaya显示文摘 | WU Lichen HSU Hsiuwen CHEN Yunchen | 2006 | Food Chemistry2006，95，2： | 1 |
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