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103篇 您的检索式:作者名="LI Junliang"
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1Ultrafast epitaxial growth of metre-sized single-crystal graphene on industrial Cu foil显示文摘A foundation of the modern technology that uses single-crystal silicon has been the growth of highquality single-crystal Si ingots with diameters up to 12 inches or larger. For many applications of graphene, large-area high-quality(ideally of single-crystal) material will be enabling. Since the first growth on copper foil a decade ago, inch-sized single-crystal graphene has been achieved. We present here the growth, in 20 min, of a graphene film of(5 ×50) cm^2 dimension with >99% ultra-highly oriented grains.This growth was achieved by:(1) synthesis of metre-sized single-crystal Cu(1 1 1) foil as substrate;(2)epitaxial growth of graphene islands on the Cu(1 1 1) surface;(3) seamless merging of such graphene islands into a graphene film with high single crystallinity and(4) the ultrafast growth of graphene film.These achievements were realized by a temperature-gradient-driven annealing technique to produce single-crystal Cu(1 1 1) from industrial polycrystalline Cu foil and the marvellous effects of a continuous oxygen supply from an adjacent oxide. The as-synthesized graphene film, with very few misoriented grains(if any), has a mobility up to ~23,000 cm^2 V^(-1)s^(-1)at 4 K and room temperature sheet resistance of ~230 Ω/□. It is very likely that this approach can be scaled up to achieve exceptionally large and high-quality graphene films with single crystallinity, and thus realize various industrial-level applications at a low cost.Xiaozhi Xu Zhihong Zhang Jichen Dong Ding Yi Jingjing Niu Muhong Wu Li Lin Rongkang Yin Mingqiang Li Jingyuan Zhou Shaoxin Wang Junliang Sun Xiaojie Duan Peng Gao Ying Jiang Xiaosong Wu Hailin Peng Rodney S. Ruoff Zhongfan Liu Dapeng Yu Enge Wang Feng Ding Kaihui Liu 2017Science Bulletin2017,62,15:40
2Gravity Flow on Slope and Abyssal Systems in the Qiongdongnan Basin,Northern South China Sea显示文摘新地震数据的学习在架并且在 Qiongdongnan 盆(QDNB ) 的深渊的设定上以内部建筑学和分发允许沉积严肃流动的鉴定。六种严肃流动类型被认出:(1 ) 有基础、一致的 truncational 的 turbidite 隧道压垂沿着架边和斜坡的关系,包括旁边地转移、使河床升高得垂直地的隧道建筑群;(2 ) 有塑造汤勺的形态学的滑坡在架裂缝上滑动步并且从变丑产生了糟糕巩固并且高水位线内容沉积;(3 ) 商业萧条在架斜坡上被限制,由一个异常斜坡坡度或由差错活动被触发;(4 ) turbidite 表建筑群(TSC ) 被归功于到盆地板扇子和斜坡扇子起源,偶尔由混浊水流喂深海洋的存款;(5 ) 沉积飘动在更低的斜坡盆地板发生,并且盖住约 400 km2 的一个区域,在越过海床流动的水流下面被产生;并且(6 ) 在深水区域的中央峡谷表示严肃流动的一种例外的类型碎片流动, turbidite 隧道,和 TSC 的一个协会创作了。它介绍平面 multisegment 和垂直多相的特征。在峡谷与好 petrophysical 性质联系的 Turbidite 能在 QDNB 被当作一个潜在的探索目标。SU Ming XIE Xinong LI Junliang JIANG Tao ZHANG Cheng HE Yunlong TIAN Shanshan ZHANG Cuimei 2011Acta Geologica Sinica(English Edition)2011,85,1:19
3Human umbilical cord-derived mesenchymal stem cell therapy in patients with COVID-19:a phase 1 clinical trial显示文摘No effective drug treatments are available for coronavirus disease 2019(COVID-19).Host-directed therapies targeting the underlying aberrant immune responses leading to pulmonary tissue damage,death,or long-term functional disability in survivors require clinical evaluation.We performed a parallel assigned controlled,non-randomized,phase 1 clinical trial to evaluate the safety of human umbilical cord-derived mesenchymal stem cells(UC-MSCs)infusions in the treatment of patients with moderate and severe COVID-19 pulmonary disease.The study enrolled 18 hospitalized patients with COVID-19(n=9 for each group).The treatment group received three cycles of intravenous infusion of UC-MSCs(3×107 cells per infusion)on days 0,3,and 6.Both groups received standard COVID-treatment regimens.Adverse events,duration of clinical symptoms,laboratory parameters,length of hospitalization,serial chest computed tomography(CT)images,the PaO2/FiO2 ratio,dynamics of cytokines,and IgG and IgM anti-SARS-CoV-2 antibodies were analyzed.No serious UC-MSCs infusion-associated adverse events were observed.Two patients receiving UC-MSCs developed transient facial flushing and fever,and one patient developed transient hypoxia at 12 h post UC-MSCs transfusion.Mechanical ventilation was required in one patient in the treatment group compared with four in the control group.All patients recovered and were discharged.Our data show that intravenous UC-MSCs infusion in patients with moderate and severe COVID-19 is safe and well tolerated.Phase 2/3 randomized,controlled,double-blinded trials with long-term follow-up are needed to evaluate the therapeutic use of UC-MSCs to reduce deaths and improve long-term treatment outcomes in patients with serious COVID-19.Fanping Meng Ruonan Xu Siyu Wang Zhe Xu Chao Zhang Yuanyuan Li Tao Yang Lei Shi Junliang Fu Tianjun Jiang Lei Huang Peng Zhao Xin Yuan Xing Fan Ji-Yuan Zhang Jinwen Song Dawei Zhang Yanmei Jiao Limin Liu Chunbao Zhou Markus Maeurer Alimuddin Zumla Ming Shi Fu-Sheng Wang 2020Signal Transduction and Targeted Therapy2020,5,1:16
4Toll-like receptor 4-mediated nuclear factor-κB activation in spinal cord contributes to chronic morphine-induced analgesic tolerance and hyperalgesia in rats显示文摘Nuclear factor kappa B(NF-κB) in the spinal cord is involved in pro-infl ammatory cytokine-mediated pain facilitation. However, the role of NF-κB activation in chronic morphine-induced analgesic tolerance and the underlying mechanisms remain unclear. In the present study, we found that the level of phosphorylated NF-κB p65(p-p65) was increased in the dorsal horn of the lumbar 4–6 segments after intrathecal administration of morphine for 7 consecutive days, and the p-p65 was co-localized with neurons and astrocytes. The expression of TNF-α and IL-1β was also increased in the same area. In addition, pretreatment with pyrrolidinedithiocarbamate(PDTC) or SN50, inhibitors of NF-κB, prevented the development of morphine analgesic tolerance and alleviated morphine withdrawal-induced allodynia and hyperalgesia. The increase in TNF-α and IL-1β expression induced by chronic morphine exposure was also partially blocked by PDTC pretreatment. In another experiment, rats receiving PDTC or SN50 beginning on day 7 of morphine injection showed partial recovery of the anti-nociceptive effects of morphine and attenuation of the withdrawal-induced abnormal pain. Meanwhile, intrathecal pretreatment with lipopolysaccharide from Rhodobacter sphae-roides, an antagonist of toll-like receptor 4(TLR4), blocked the activation of NF-κB, and prevented the development of morphine tolerance and withdrawal-induced abnormal pain. These data indicated that TLR4-mediated NF-κB activation in the spinal cord is involved in the development and maintenance of morphine analgesic tolerance and withdrawalinduced pain hypersensitivity.Liying Bai Caihong Zhai Kun Han Zhisong Li Junliang Qian Ying Jing Wei Zhang Ji-Tian Xu 2014Neuroscience Bulletin2014,30,6:10
5Availability modeling for periodically inspection system with different lifetime and repair-time distribution显示文摘Availability is a main feature of design and operation of all engineering system. Recently,availability evaluation of periodical inspection systems with different structures is at the center of attention due to the wide application in engineering. In this paper, an analytical and probabilistic availability model for periodical inspection system is proposed by a new recursively algorithm,which can achieve limiting average availability and instantaneous availability of periodical inspection system under arbitrary lifetime and repair-time distributions. Then three application examples are presented, the systems lifetime and repair-time are respectively fellow exponential/exponential,Weibull/normal and Weibull/lognormal distribution. Finally, a Weibull/lognormal system is studied to analyze the dynamic relationship between inspection period and availability. The results indicate that the proposed approach can provide the technology support for improving system availability and determining reasonable inspection period.Junliang LI Yueliang CHEN Yong ZHANG Hailiang HUANG 2019Chinese Journal of Aeronautics2019,32,7:7
6Mulching mode and planting density affect canopy interception loss of rainfall and water use efficiency of dryland maize on the Loess Plateau of China显示文摘High and efficient use of limited rainwater resources is of crucial importance for the crop production in arid and semi-arid areas. To investigate the effects of different soil and crop management practices(i.e., mulching mode treatments: flat cultivation with non-mulching, flat cultivation with straw mulching, plastic-covered ridge with bare furrow and plastic-covered ridge with straw-covered furrow; and planting density treatments: low planting density of 45,000 plants/hm^2, medium planting density of 67,500 plants/hm^2 and high planting density of 90,000 plants/hm^2) on rainfall partitioning by dryland maize canopy, especially the resulted net rainfall input beneath the maize canopy, we measured the gross rainfall, throughfall and stemflow at different growth stages of dryland maize in 2015 and 2016 on the Loess Plateau of China. The canopy interception loss was estimated by the water balance method. Soil water storage, leaf area index, grain yield(as well as it components) and water use efficiency of dryland maize were measured or calculated. Results showed that the cumulative throughfall, cumulative stemflow and cumulative canopy interception loss during the whole growing season accounted for 42.3%–77.5%, 15.1%–36.3% and 7.4%–21.4% of the total gross rainfall under different treatments, respectively. Soil mulching could promote the growth and development of dryland maize and enhance the capability of stemflow production and canopy interception loss, thereby increasing the relative stemflow and relative canopy interception loss and reducing the relative throughfall. The relative stemflow and relative canopy interception loss generally increased with increasing planting density, while the relative throughfall decreased with increasing planting density. During the two experimental years, mulching mode had no significant influence on net rainfall due to the compensation between throughfall and stemflow, whereas planting density significantly affected net rainfall. The highest grain yield and water use efficiency of dryland maize were obtained under the combination of medium planting density of 67,500 plants/hm^2 and mulching mode of plastic-covered ridge with straw-covered furrow. Soil mulching can reduce soil evaporation and retain more soil water for dryland maize without reducing the net rainfall input beneath the maize canopy, which may alleviate the contradiction between high soil water consumption and insufficient rainfall input of the soil. In conclusion, the application of medium planting density(67,500 plants/hm^2) under plastic-covered ridge with bare furrow is recommended for increasing dryland maize production on the Loess Plateau of China.ZHENG Jing FAN Junliang ZHANG Fucang YAN Shicheng GUO Jinjin CHEN Dongfeng LI Zhijun 2018Journal of Arid Land2018,10,5:6
7Formation of willow leaf-like structures composed of NH2-MIL68(In) on a multifunctional multiwalled carbon nanotube backbone for enhanced photocatalytic reduction of Cr(VI)显示文摘photogenerated 电子 / 洞以及提高的可见轻吸收的有效分离和转移在 photocatalytic 反应起必要作用。支持 Cr (VI ) 的 photocatalytic 减小,一个有毒的重金属离子, multiwalled 碳 nanotube (MWCNT ) 作为一个电子领受人被介绍进 NH 2-MIL-68(In) 。这导致了一棵柳树的生长形成 MWCNT/NH 2-MIL-68(In)(PL-1 ) 的一根 MWCNT 脊梁上的像叶子的金属器官的框架(MOF ) ,它显示出 photogenerated 搬运人的高度有效的转移。而且, MWCNT 加入为 Cr (VI ) 散开介绍了更多的 mesopores 并且没有降低传导乐队位置,提高了可见轻吸附。作为结果, PL-1 的运动常数被发现是几乎三的 photocatalytic 比父母 NH 2-MIL-68(In) 的高预定。因此,在 MWCNT 上种 MOF 由利用太阳能为环境污染的有效补习提供一个灵巧、有希望的答案。这个工作提供为 photocatalytic 反应使用 MWCNT/MOF composites 的第一个例子。Yunhong Pi Xiyi Li Qibin Xia Junliang Wu Zhong Li Yingwei Li Jing Xiao 2017Nano Research2017,10,10:5
8Arbitrary cylindrical vector beam generation enabled by polarization-selective Gouy phase shifter显示文摘Cylindrical vector beams(CVBs),which possess polarization distribution of rotational symmetry on the transverse plane,can be developed in many optical technologies.Conventional methods to generate CVBs contain redundant interferometers or need to switch among diverse elements,thus being inconvenient in applications containing multiple CVBs.Here we provide a passive polarization-selective device to substitute interferometers and simplify generation setup.It is accomplished by reversing topological charges of orbital angular momentum based on a polarization-selective Gouy phase.In the process,tunable input light is the only condition to generate a CVB with arbitrary topological charges.To cover both azimuthal and radial parameters of CVBs,we express the mapping between scalar Laguerre–Gaussian light on a basic Poincaré sphere and CVB on a high-order Poincaré sphere.The proposed device simplifies the generation of CVBs enormously and thus has potential in integrated devices for both quantum and classic optical experiments.JUNLIANG JIA KEPENG ZHANG GUANGWEI HU MAPING HU TONG TONG QUANQUAN MU HONG GAO FULI LI CHENG-WEI QIU PEI ZHANG 2021Photonics Research2021,9,6:4
9Macroporous Ni foam-supported Co_3O_4 nanobrush and nanomace hybrid arrays for high-efficiency CO oxidation显示文摘Herein, we reported the synthesis of well-defined Co_3O_4 nanoarrays(NAs) supported on a monolithic three-dimensional macroporous nickel(Ni) foam substrate for use in highefficiency CO oxidation. The monolithic Co_3O_4 NAs catalysts were obtained through a generic hydrothermal synthesis route with subsequent calcination. By controlling the reaction time,solvent polarity and deposition agent, these Co_3O_4 NAs catalysts exhibited various novel morphologies(single or hybrid arrays), whose physicochemical properties were further characterized by using several analytical techniques. Based on the catalytic and characterization analyses, it was found that the Co_3O_4 NAs-6 catalyst with nanobrush and nanomace arrays displayed enhanced catalytic activity for CO oxidation, achieving an efficient 100% CO oxidation conversion at a gas hourly space velocity(GHSV) 10,000 hr^(-1) and 150°C with longterm stability. Compared with the other Co_3O_4 NAs catalysts, it had the highest abundance of surface-adsorbed oxygen species, excellent low-temperature reducibility and was rich in surface-active sites(Co^(3+)/Co^(2+)= 1.26).Shengpeng Mo Hui He Quanming Ren Shuangde Li Weixia Zhang Mingli Fu Limin Chen Junliang Wu Yunfa Chen Daiqi Ye 2019Journal of Environmental Sciences2019,31,1:4
10Gap-free genome assembly and comparative analysis reveal the evolution and anthocyanin accumulation mechanism of Rhodomyrtus tomentosa显示文摘Rhodomyrtus tomentosa is an important f leshy-fruited tree and a well-known medicinal plant of the Myrtaceae family that is widely cultivated in tropical and subtropical areas of the world.However,studies on the evolution and genomic breeding of R.tomentosa were hindered by the lack of a reference genome.Here,we presented a chromosome-level gap-free T2T genome assembly of R.tomentosa using PacBio and ONT long read sequencing.We assembled the genome with size of 470.35 Mb and contig N50 of∼43.80 Mb with 11 pseudochromosomes.A total of 33382 genes and 239.31 Mb of repetitive sequences were annotated in this genome.Phylogenetic analysis elucidated the independent evolution of R.tomentosa starting from 14.37MYA and shared a recent WGD event with other Myrtaceae species.We identified four major compounds of anthocyanins and their synthetic pathways in R.tomentosa.Comparative genomic and gene expression analysis suggested the coloring and high anthocyanin accumulation in R.tomentosa tends to be determined by the activation of anthocyanin synthesis pathway.The positive selection and up-regulation of MYB transcription factors were the implicit factors in this process.The copy number increase of downstream anthocyanin transport-related OMT and GST gene were also detected in R.tomentosa.Expression analysis and pathway identification enriched the importance of starch degradation,response to stimuli,effect of hormones,and cell wall metabolism during the f leshy fruit development in Myrtaceae.Our genome assembly provided a foundation for investigating the origins and differentiation of Myrtaceae species and accelerated the genetic improvement of R.tomentosa.angping Li Shiqiang Xu Zitong Xiao Jingming Wang Yu Mei Haifei Hu Jingyu Li Jieying Liu Zhuangwei Hou Junliang Zhao Shaohai Yang Jihua Wang 2023Horticulture Research2023,10,3:3
11Mechanical tests on the reconstructed anterior cruciate ligament fixed with allogenetic cortical bone cross-pin on the femoral side显示文摘Liu Chang Liu Yujie Zhang Yingze Qu Feng Li Shuyuan Wang Junliang Qi Wei Wang Aiyuan Wang Xin Liang Jianjun Liang Dongqi Zhu Juanli Liu Yang 2014Chinese Medical Journal2014,,15:3
12Adult-repopulating lymphoid potential of yolk sac blood vessels is not confined to arterial endothelial cells显示文摘During embryogenesis,hematopoietic stem progenitor cells(HSPCs)are believed to be derived from hemogenic endothelial cells(HECs).Moreover,arterial feature is proposed to be a prerequisite for HECs to generate HSPCs with lymphoid potential.Although the molecular basis of hematopoietic stem cell-competent HECs has been delicately elucidated within the embryo proper,the functional and molecular characteristics of HECs in the extraembryonic yolk sac(YS)remain largely unresolved.In this study,we initially identified six molecularly different endothelial populations in the midgestational YS through integrated analysis of several single-cell RNA sequencing(scRNA-seq)datasets and validated the arterial vasculature distribution of Gja5+ECs using a Gja5-EGFP reporter mouse model.Further,we explored the hemogenic potential of different EC populations based on their Gja5-EGFP and CD44 expression levels.The hemogenic potential was ubiquitously detected in spatiotemporally different vascular beds on embryonic days(E)8.5–E9.5 and gradually concentrated in CD44-positive ECs from E10.0.Unexpectedly,B-lymphoid potential was detected in the YS ECs as early as E8.5 regardless of their arterial features.Furthermore,the capacity for generating hematopoietic progenitors with in vivo lymphoid potential was found in nonarterial as well as arterial YS ECs on E10.0–E10.5.Importantly,the distinct identities of E10.0–E10.5 HECs between YS and intraembryonic caudal region were revealed by further scRNA-seq analysis.Cumulatively,these findings extend our knowledge regarding the hemogenic potential of ECs from anatomically and molecularly different vascular beds,providing a theoretical basis for better understanding the sources of HSPCs during mammalian development.Chaojie Wang Yandong Gong Anbang Wei Tao Huang Siyuan Hou Junjie Du Zongcheng Li Junliang Wang Bing Liu Yu Lan 2021Science China(Life Sciences)2021,64,12:3
13HAZ Characterization and Mechanical Properties of QP980-DP980 Laser Welded Joints显示文摘The QP980-DP980 dissimilar steel joints were fabricated by fiber laser welding.The weld zone(WZ)was fully martensitic structure,and heat-affected zone(HAZ)contained newly-formed martensite and partially tempered martensite(TM)in both steels.The supercritical HAZ of the QP980 side had higher microhardness(~549.5 Hv)than that of the WZ due to the finer martensite.A softened zone was present in HAZ of QP980 and DP980,the dropped microhardness of softened zone of the QP980 and DP980 wasΔ21.8 Hv andΔ40.9 Hv,respectively.Dislocation walls and slip bands were likely formed at the grain boundaries with the increase of strain,leading to the formation of low angle grain boundaries(LAGBs).Dislocation accumulation more easily occurred in the LAGBs than that of the HAGBs,which led to significant dislocation interaction and formation of cracks.The electron back-scattered diffraction(EBSD)results showed the fraction of LAGBs in sub-critical HAZ of DP980 side was the highest under different deformation conditions during tensile testing,resulting in the failure of joints located at the sub-critical HAZ of DP980 side.The QP980-DP980 dissimilar steel joints presented higher elongation(~11.21%)and ultimate tensile strength(~1011.53 MPa)than that of DP980-DP980 similar steel joints,because during the tensile process of the QP980-DP980 dissimilar steel joint(~8.2%and 991.38 MPa),the strain concentration firstly occurred on the excellent QP980 BM.Moreover,Erichsen cupping tests showed that the dissimilar welded joints had the lowest Erichsen value(~5.92 mm)and the peak punch force(~28.4 kN)due to the presence of large amount of brittle martensite in WZ and inhomogeneous deformation.Junliang Xue Peng Peng Wei Guo Mingsheng Xia Caiwang Tan Zhandong Wan Hongqiang Zhang Yongqiang Li 2021Chinese Journal of Mechanical Engineering2021,34,4:3
14Clinical outcomes of early weight-bearing after arthroscopic microfracture during the treatment of osteochondral lesions of the talus显示文摘Li Shuyuan Li Hongliang Liu Yujie Qu feng Wang Junliang Liu Chang 2014Chinese Medical Journal2014,,13:3
15Experimental Insights on the Structural Patterns and Their Formation Mechanisms of the Xujiaweizi Fault Depression in the Songliao Basin显示文摘The Xujiaweizi(XJWZ) fault depression is a primary area for deep-seated gas exploration in Daqing. Through seismic profile interpretation, the main sag-controlling fault and structural characteristics in the XJWZ fault depression were analyzed based on folds and faults analysis. A three-dimensional geological model of the XJWZ fault depression was also set up to enable further discussion by means of structural physical modeling. According to our research, the basic structural framework of the XJWZ fault depression was the result of regional extension. Its formation and evolution were mainly controlled by the Xuxi fault. The structural framework of S-N blocking was due to changes in the fracture attitude. The Xuzhong uplift and the depressions on both sides belong to a normal-fault-related fold and were formed by controlling of the ramp/flat normal fault in the same tectonic movement period.Wei Long Zhongquan Li Ying Li Junliang Chen Fengyu Tan Zhiyi Zheng Jinmiao Hu Runfang Li 2018Journal of Earth Science2018,29,2:3
16The impact of cropland conversion on environmental effect in the Loess Plateau: a pilot study based on the national experimental bases显示文摘Conversion of cropland to forestry and grassland is an important method to reduce soil erosion and improve the biophysicalenvironmentin the Loess Plateau.The feasibility,methods,and environmentaleffectsofcropland conversion were studied based on 11 typicalwatershedsofnational experimentalbasesinstead ofdifferentgeographic areasofthe LoessPlateau.Between 1986 and 2000, cropland,sloping cropland and non-agriculturalland decreased by 8% ,92.5% and 8% respectively, while forestry increased by 15.7% .The land use change notonly decreased annualsoilerosion by 74% , but also increased vegetation coverage by 100% and improved the soil condition and biodiversity.This can be achieved by building basic farmland,increasing capitaland scientific input, and planting treesand grassesaccording to thenaturalbiophysicalrestrictions.WANG Fei LI Rui JIAO Feng YANG Qingke TIAN Junliang 2005Journal of Geographical Sciences2005,15,4:3
17Large specific surface area S-doped Fe-N-C electrocatalysts derived from Metal-Organic frameworks for oxygen reduction reaction显示文摘It is highly desired but challenging to develop platinum group metal-free electrocatalysts for oxygen reduction reaction(ORR),which can promote the commercialization of fuel cell technology.To achieve this target,we report a one-step doping method to prepare S-doped Fe-N-C catalysts using zeolite imidazole framework(ZIF-8)and iron(Ⅲ)thiocyanate(Fe(SCN)_(3))as precursor.Different from conventional doping approach,i.e.physical mixing,Fe(SCN)_(3) is in-situ added during ZIF-8 formation which would encapsulate Fe(SCN)_(3) molecules inside ZIF-8 to avoid structure destruction and create potential replacement of Zn ions by Fe ions to form uniform Fe-N_(4) complexes.As a result,the prepared S-doped Fe-N-C catalysts own large specific surface areas with a maximum value of 1326 m^(2) g^(-1) and a dual-scale porous structure that benefits mass transport.Significantly,the composition-optimized catalyst exhibits superior ORR activity in both 0.1 M HClO_(4) electrolyte and 0.1 M KOH electrolyte,in which the half-wave potential reaches 0.81 V and 0.92 V(vs.RHE),respectively.Remarkable stability is also attained,which loses 2 m V only after 10000 potential cycles in O_(2)-saturated 0.1 M HClO_(4) and remains almost constant in O_(2)-saturated 0.1 M KOH,surpassing commercial Pt/C catalyst in both acidic and alkaline medium.Xiaohui Yan Xiaolin Li Cehuang Fu Chen Lin Huanming Hu Shuiyun Shen Guanghua Wei Junliang Zhang 2020Progress in Natural Science:Materials International2020,30,6:3
18Unraveling specific role of carbon matrix over Pd/quasi-Ce-MOF facilitating toluene enhanced degradation显示文摘Metal organic frameworks(MOFs)derivatives represented by quasi-MOFs have excellent physical and chemical properties and can be applied for the catalytic combustion of volatile organic compounds(VOCs).In this work,Pd/quasi-Ce-BTC synthesized by simple one-step Npyrolysis was applied to the oxidation of toluene,showing excellent toluene catalytic activity(T_(90)=175℃,30000 mL/(g·h)).Microscopic analyses indicate the formation and interaction of a carbon matrix composite quasi-MOF structure interface.The results show that the amorphous carbon matrix formed during the partial pyrolysis of Ce-BTC significantly improves the adsorption and activation capacity of toluene in the reaction,and constructs a reductive system to maintain high concentrations of Ce^(3+)and Pd^(0),which can facilitate the activation and utilization of oxygen in reaction.Quasi in-situ XPS proves that carbon matrix is indirectly involved in the activation and storage of oxygen,and Pd^(0)is the crucial active site for the activation of oxygen.Stability and water resistance tests display good stability of Pd/quasi-Ce-BTC.This work provides a potential method for designing quasi-MOF catalysts towards VOCs effective abatement.Chunjing Su Zhi Li Mengqi Mao Wenhua Ye Jinping Zhong Quanming Ren Hairong Cheng Haomin Huang Mingli Fu Junliang Wu Yun Hu Daiqi Ye Haihong Xu 2022Journal of Rare Earths2022,40,11:2
19Visible Light Driven Copper(I )Catalyzed Oxyamination of Electron Deficient Alkenes显示文摘Summary of main observation and conclusion A vible light driven Cu()-catalyzed intermolecular oxyamination of electron-deficient olefins has been achieved by using O-benzoylhydroxylamines as donors both for amine and oxygen.The transformation properties afford mild conditions and a wide substrate scope,providing access to ester derivatives of 6-amino alcohols with good yields and high regioselectivity.Sanliang Li Qiaoyu Chen Wenbo Li Guangxin Gu Junliang Zhang 2020Chinese Journal of Chemistry2020,38,10:2
20The spatiotemporal variation of the wind-induced near-inertial energy flux in the mixed layer of the South China Sea显示文摘On the basis of the QSCAT/NCEP blended wind data and simple ocean data assimilation(SODA), the wind-induced near-inertial energy flux(NIEF) in the mixed layer of the South China Sea(SCS) is estimated by a slab model, and the model results are verified by observational data near the Xisha Islands in the SCS. Then, the spatial and temporal variations of the NIEF in the SCS are analyzed. It is found that, the monthly mean NIEF exhibits obvious spatial and temporal variabilities, i.e., it is large west of Luzon Island all the year, east of the Indo-China Peninsula all the year except in spring, and in the northern SCS from May to September. The large monthly mean NIEF in the first two zones may be affected by the large local wind stress curl whilst that in the last zone is probably due to the shallow mixed layer depth. Moreover, the monthly mean NIEF is relatively large in summer and autumn due to the passage of typhoons. The spatial mean NIEF in the mixed layer of the SCS is estimated to be about 1.25 m W/m2 and the total wind energy input from wind is approximately 4.4 GW. Furthermore, the interannual variability of the spatial monthly mean NIEF and the Ni?o3.4 index are negatively correlated.LI Juan LIU Junliang CAI Shuqun PAN Jiayi 2015Acta Oceanologica Sinica2015,34,1:2
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