|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Records of the East Asian winter monsoon from the mud area on the inner shelf of the East China Sea since the mid-Holocene显示文摘AMS14C dating and analysis of grain size,major elements and clay minerals were applied to Core MZ01 from the mud area on the inner shelf of the East China Sea.Based on the environmentally sensitive grain size,clay mineral and major element assemblages,the history of the East Asia winter monsoon since the mid-Holocene could be reconstructed.These three proxies,mean grain size(>9.71μm),chemical index of alteration(CIA)and ratio of smectite to kaolinite in particular,show similar fluctuation patterns. Furthermore,10 extreme values corresponding to the contemporary cooling events could be recognized since the mid-Holocene;these extreme values are likely to have been caused by the strengthening of the East Asia winter monsoon.The cooling events correlated well with the results of theδ18O curves of the Dunde ice core and GISP2,which therefore revealed a regional response to global climate change.Four stages of the East Asia winter monsoon were identified,i.e.8300-6300 a BP,strong and unstable;6300-3800 a BP,strong but stable;3800-1400 a BP,weak and unstable;after 1400 a BP,weak but stable. | LIU ShengFa SHI XueFa LIU YanGuang QIAO ShuQing YANG Gang FANG XiSheng WU YongHua LI ChaoXin LI XiaoYan ZHU AiMei GAO JingJing | 2010 | Chinese Science Bulletin2010，55，21： | 25 |
| 2 | Clay mineral composition and their sources for the fluvial sediments of Taiwan Residents rivers显示文摘Located at the collision boundary between the Philippine Sea Plate and the Eurasian Continental Plate,the island of Taiwan is generally recognized as an important example in the MARGINS Program Science Plan and 'source-to-sink' research because of its high tectonic activity,heavy rainfall and unique geography.Large suspended sediment loads are transported to the adjacent ocean by Taiwan Residents rivers every year,making Taiwan an important source of sediments into the adjacent seas and a natural laboratory for studying the systemic movement of fluvial sediments from source to sink.A detailed study on the clay mineral composition of surface sediments collected from the drainage basins of 12 Taiwan Residents rivers using X-ray diffraction methods was conducted.Our results indicated that the clay mineral assemblages consisted dominantly of illite(approximately 73%) and chlorite(approximately 24%),with lesser abundances of kaolinite(approximately 3%) and even lower levels of smectite from the Danshuei River sediments in northwestern Taiwan.The Jhuoshuei River sediments from western Taiwan contained clay mineral assemblages that consisted of illite(approximately 75%) and chlorite(approximately 25%),but they lacked kaolinite and smectite.In southwestern Taiwan,the clay mineral assemblages were dominated by illite(approximately 75%) and chlorite(approximately 23%),but had a low abundance of kaolinite(generally < 2%) and no smectite.The clay mineral assemblages in eastern Taiwan are obviously different from those in western parts of the island.The most noticeable difference is that the average abundance of chlorite in the Hualien River from eastern Taiwan was the highest(approximately 48%) of all the Taiwan Residents rivers.We concluded that,in general,the clay mineral assemblages in Taiwan Residents rivers were mainly composed of illite and chlorite with kaolinite and smectite being scarce,and these trends are different from those in China's mainland rivers.The clay mineral composition shown in this study was primarily determined by the properties of the bedrock,and the differential weathering intensities of the drainage area.The surface sediments in Taiwan's rivers showed a greater abundance of illite and chlorite because the outcropped rocks were mainly composed of Tertiary sedimentary rocks,especially sandstone,shale and slate,and show strong physical weathering.The relatively high relief and more abundant rainfall also caused the clay minerals in the fluvial sediments to be transported to the estuaries down rivers from the mountains and then delivered to the adjacent seas by currents and waves over a shorter time scale. | LI ChuanShun SHI XueFa KAO ShuhJi CHEN MinTe LIU YanGuang FANG XiSheng LUE HuaHua ZOU JianJun LIU ShengFa QIAO ShuQing | 2012 | Chinese Science Bulletin2012，57，6： | 23 |
| 3 | WS2 nanoflakes from nanotubes for electrocatalysis显示文摘为切开的水的下一代的催化剂向可更新的氢经济是关键的。MoS2 和 WS2 在边地点与高催化的活动代表地球丰富的、高贵金属阴极选择。在他们的开发的一挑战是这些材料到 nanostructure 以便通过另外的边地点的创造完成增加的性能。在这个工作,我们表明一条简单线路用 sonochemical 脱落形成 nanostructured-WS2 在 WS2 nanotubes 打破夹层和 intralayer 契约。产生很少层 nanoflakes 是与边地点的高密度宽的 100 nm。WS2 nanoflakes 为氢进化反应作为阴极被利用(她的) 并且展览上级性能到 WS2 nanotubes 和体积粒子与一个更低的发作潜力,更浅的 Tafel 斜坡和增加的当前的密度。未来工作可以采用进一步改进 electrocatalytic 活动的极端小的 nanoflakes,掺杂物原子,或 graphene 混血儿。 | Charina L. Choi Ju Feng Yanguang Li Justin Wu Alia Zak Reshef Tenne Hongjie Dai | 2013 | Nano Research2013，6，12： | 11 |
| 4 | MoSe2 porous microspheres comprising monolayer flakes with high electrocatalytic activity显示文摘综合的一条灵巧的胶体的线路 MoSe < 潜水艇 class= “ a-plus-plus ” > 2 有由 MoSe 组成的 400600 nm 的直径的多孔的 microspheres < 潜水艇 class= “ a-plus-plus ” > 2 个 单层薄片在厚度的 0.7 nm 被报导。溶剂 trioctylamine TOA 和 oleylamine 操作维护管理被发现在 MoSe 的形成起重要作用 < 潜水艇 class= “ a-plus-plus ” > 2 microspheres, TOA 由此决定三维的 3D microspherical 形态学和操作维护管理,指导 MoSe 的形成 < 潜水艇 class= “ a-plus-plus ” > 2 个 单层薄片。柔韧的 3D MoSe <潜水艇class=“ a-plus-plus ”> 2 microspheres 展览为 electrocatalytic 氢进化反应的显著活动和耐久性她在酸,维持 77 mV 的小发作过电位并且为 5 妈/厘米的当前的密度保留 100 mV 的小过电位<啜class=“ a-plus-plus ”>在 1,000 以后的 2 骑车。另外,类似的 3D WSe < 潜水艇 class= “ a-plus-plus ” > 2 microspheres 能被使用这个方法也准备。我们期望这条灵巧的胶体的线路能进一步被扩展综合将在域例如里发现应用的另外的多孔的结构在精力存储,催化作用,并且察觉到。 | Yejun Zhang Qiufang Gong Lun Li Hongchao Yang Yanguang Li Qiangbin Wang | 2015 | Nano Research2015，8，4： | 9 |
| 5 | Separation and Precise Measurement of Lithium Isotopes in Three Reference Materials Using Multi Collector-Inductively Coupled Plasma Mass Spectrometry显示文摘Lithium separation technique for three reference materials has been established together with precise determination of lithium isotope using a Neptune multi collector-inductively coupled plasma mass spectrometry (MC-ICP-MS). The solutions of lithium element standard reference materials, potassium, calcium, sodium, magnesium and iron single element, were used to evaluate analytical methods applied. Three separate stages of ion-exchange chromatography were carried out using organic cation-exchange resin (AG 50W-X8). Lithium was enriched for the three stages using different eluants, which are 2.8 M HCl, 0.15 M HCl and 0.5 M HCl in 30% ethanol, respectively. The columns for the first and second stages are made of polypropylene, and those for the third stage are made of quartz. Total reagent volume for the entire chemical process was 35 mL for three reference materials. The recovery yielded for the three stages is 98.9-101.2% with an average of 100.0%, 97.6- 101.9% with an average of 99.9%, and 99.8-103.3% with an average of 100.6%, respectively. The precision of this technique is conservatively estimated to be ±0.72-1.04‰ (2σ population), which is similar to the precision obtained by different authors in different laboratories with MC-ICP-MS. The δ 7 Li values ( 7 Li/ 6 Li relative to the IRMM-016 standard) determined for andesite (AGV-2) and basalt (BHVO-2) are 5.68‰ (n=18), 4.33‰ (n=18), respectively. The δ 7 Li value ( 7 Li/ 6 Li relative to the L-SVEC standard) determined for IRMM-016 is -0.01‰ (n=15). All these analytical results are in good agreement with those previously reported. In addition, the results for the same kinds of samples analyzed at the MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, are consistent with those obtained at the Plasma Laboratory, University of Maryland, within analytical uncertainty. According to these experiment results, it is concluded that this proposed procedure is a suitable method for determining the lithium isotopic composition of natural samples. | TIAN Shihong HOU Zengqian SU Aina HOU Kejun HU Wenjie LI Zhenzhen ZHAO Yue GAO Yanguang LI Yanhe YANG Dan YANG Zhusen | 2012 | Acta Geologica Sinica(English Edition)2012，86，5： | 9 |
| 6 | Copper-Bismuth Bimetallic Microspheres for Selective Electrocatalytic Reduction of CO2 to Formate显示文摘Summary of main observation and conclusion Electrocatalytic carbon dioxide reduction holds great promise for reducing the atmospheric CO2 level and alleviating the energy crisis. High-performance electrocatalysts are often required in order to lower the high overpotential and expedite the sluggish reaction kinetics of CO2 electroreduction. Copper is a promising candidate metal. However, it usually suffers from the issues of poor stability and low product selectivity. In this work, bimetallic Cu-Bi is obtained by reducing the microspherical copper bismuthate (CuBi2O4) for selectively catalyzing the CO2 reduction to formate (HCOO-). The bimetallic Cu-Bi electrocatalyst exhibits high activity and selectivity with the Faradic efficiency over 90% in a wide potential window. A maximum Faradaic efficiency of ~95% is obtained at -0.93 V versus reversible hydrogen electrode. Furthermore, the catalyst shows high stability over 6 h with Faradaic efficiency of -95%. This study provides an important clue in designing new functional materials for CO2 electroreduction with high activity and selectivity. | Lin Jia Hui Yang Jun Deng Junmei Chen Yuan Zhou Pan Ding Leigang Li Na Han Yanguang Li | 2019 | Chinese Journal of Chemistry2019，37，5： | 8 |
| 7 | Intermetallic PtBi core/ultrathin Pt shell nanoplates for efficient and I stable methanol and ethanol electro-oxidization显示文摘The development of Pt-based core/shell nanoparticles represents an emerging class of electrocatalysts for fuel cells, such as methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). Here, we present a one-pot synthesis approach to prepare hexagonal PtBi/Pt core/shell nan ostructure composed of an in termetallic PtiBii core and an ultrathi n Pt shell with well-defined shape, size, and composition.The structure and the synergistic effect among different components enhanced their MOR and EOR performanee. The optimized Pt2Bi nanoplates exhibit excellent mass activities in both MOR (4,820 mA·mgpt^-1) and EOR (5,950 mA·mgpt^1) conducted in alkaline media, which are 6.15 times and 8.63 times higher than those of commercial Pt/C, respectively. Pt2Bi nan opiates also show superior operati on durability to commercial Pt/C. This work may inspire the rational design and synthesis of Pt-based nanoparticles with improved performance for fuel cells and other applications. | Xiaolei Yuan Xiaojing Jiang Muhan Cao Lei Chen Kaiqi Nie Yong Zhang Yong Xu Xuhui Sun Yanguang Li Qiao Zhang | 2019 | Nano Research2019，12，2： | 7 |
| 8 | Iron polyphthalocyanine sheathed multiwalled carbon nanotubes: A high-performance electrocatalyst for oxygen reduction reaction显示文摘过去的十年为氧减小反应(ORR ) 见证对非宝贵的基于金属的 electrocatalysts 的研究和发展的兴趣的快速的巨浪。直到现在,在酸的电解质的最好的催化剂只是从高温度的热分解的 Fe-N-C-type 材料。尽管有金属的 ORR 活动,酞毒或卟啉 macrocycles 长被知道了,他们的耐久性遗体穷人。在这个工作,我们把这些 macrocycles 用作一个基础开发新奇器官碳的混合材料从在原处用加热方法的低温度的微波的传导性的 multiwalled 碳 nanotube 脚手架上的铁酞毒的聚合。在最佳的 polymerto- 碳比率,混合 electrocatalyst 与潜力(0.80 V ) ,大集体活动(在 0.80 V 的多达 18.0 A/g ) ,和低过氧化物产出的一个积极一半波浪展出优秀 ORR 活动(<3%) 。另外,在聚合物和碳 nanotubes 之间的强壮的电子联合被相信压制 macrocycles 的 demetallization,在酸的显著地改善的骑车的稳定性。我们的学习代表没有高温度的热分解,准备的非宝贵的基于金属的 electrocatalysts 的一个稀罕例子,当为实际应用程序与潜力在酸的媒介举办 ORR 活动时。 | Xinxia wang Bin Wang Jun Zhong Feipeng Zhao Na Han Wenjing Huang Min Zeng Jian Fan Yanguang Li | 2016 | Nano Research2016，9，5： | 7 |
| 9 | Cobalt atoms dispersed on hierarchical carbon nitride support as the cathode electrocatalyst for high-performance lithium-polysulfide batteries显示文摘Lithium-sulfur batteries are promising candidates for next-generation energy storage but are confronted with several challenges. One of the possible solutions is to design proper cathode electrocatalysts to accelerate the redox interconversion of solvated polysulfide intermediates. Herein, we report cobalt atoms dispersed on hierarchical carbon nitride support as an effective cathode electrocatalyst for lithium-polysulfide batteries. The electrocatalyst material is prepared from the simple reaction between melamine and cyanuric acid in the presence of Co^2+, followed by the Ar annealing. The product has a unique hierarchical structure consisting of many thin and porous C3 N4 nanosheets finely dispersed with Co atoms. The atomic dispersion of Co species is confirmed by X-ray absorption experiments.Electrochemical measurements reveal that it can promote the interconversion of polysulfides. As a result,batteries using this cathode electrocatalyst achieve large capacity($1400 mAh/g at 1.6 mA/cm^2), good rate performance($800 mAh/g at 12.8 mA/cm^2) and impressive cycling stability under different current densities and different sulfur loadings. | Jialing Wu Junmei Chen Yang Huang Kun Feng Jun Deng Wei Huang Yunling Wu Jun Zhong Yanguang Li | 2019 | Science Bulletin2019，64，24： | 7 |
| 10 | Nickel-coated silicon photocathode for water splitting in alkaline electrolytes显示文摘切开的 Photoelectrochemical (PEC ) 水是一条有希望的途径收获并且存储太阳能[1 ] 。硅广泛地由于它匹配太阳的光谱的合适的乐队差距(1.12 eV ) 为 PEC photoelectrodes 被调查了[2 ] 。这里,我们调查作为催化剂两个都采用镍并且第一次在基本电解质为 photoelectrochemical 氢进化保护 p 类型硅光阴极的层。硅光阴极被在 5 nm Ni 跟随的 p 类型硅晶片上扔 15 nm Ti 做。光阴极在碱的答案(1 M KOH ) 负担得起 0.3 V 对可逆的氢电极(RHE ) 的一个发作潜力。Ni/Ti/p-Si 光阴极的稳定性在 KOH 在 12 h 上看了 100 mV 腐烂,但是稳定性显著地被改进光阴极什么时候在钾硼酸盐缓冲区答案被操作(pH 9.5 ) 。电极表面被发现在 10 妈 / 厘米的经常的当前的密度在连续操作的 12 h 以后仍然保持未经触动 < 啜 class= “ a-plus-plus ” > 在钾硼酸盐缓冲区的 2 ,建议 Ni 负担得起 Si 的好保护在硼酸盐缓冲区基于光阴极。 | Ju Feng Ming Gong Michael J. Kenney Justin Z. Wu Bo Zhang Yanguang Li Hongjie Dai | 2015 | Nano Research2015，8，5： | 6 |
| 11 | Stabilizing nickel sulfide nanoparticles with an ultrathin carbon layer for improved cycling performance in sodium ion batteries显示文摘Nanostructured 金属硫化物是为钠离子电池的潜在的电极材料;然而,他们典型地由于大体积变化和分泌物产品的溶解受不了很差的骑车的稳定性。此处,我们建议合理材料设计策略让基于硫化物的材料处理这些问题。拿镍硫化物(是的 NiS x ) 一个例子,我们证明它的电气化学的性能能被限制 NiS 在滤的 x nanoparticles 传导性的碳 nanotube 网络,并且与 ultrathin 碳涂层层稳定他们。碳层用作一个物理障碍减轻体积变化和活跃材料的溶解的效果。混合材料展出了一个大可逆特定的能力 > 超过 200 的 500 mAh/g 和优秀骑车稳定性骑车。作为电池阳极材料给 NiS x 的传统地有问题的性质,我们相信这里报导的观察高效反映我们的材料设计策略的有效性。 | Feipeng Zhao Qiufang Gong Brian Traynor Duo Zhang Jiaojiao Li Hualin Ye Fengjiao Chen Na Han Yeyun Wang Xuhui Sun Yanguang Li | 2016 | Nano Research2016，9，10： | 6 |
| 12 | Enhanced photoresponse of Cu2O/ZnO heterojunction with piezo-modulated interface engineering显示文摘 | Pei Lin Xiang Chen Xiaoqin Yan Zheng Zhang Haoge Yuan Peifeng Li Yanguang Zhao Yue Zhang | 2014 | Nano Research2014，7，6： | 6 |
| 13 | Interlayer-expanded MoS2 assemblies for enhanced electrochemical storage of potassium ions显示文摘Potassium-ion batteries are regarded as the low-cost alternative to lithium-ion batteries.However,their development is hampered by the lack of suitable electrode materials.In this work,we demonstrate that MoS2 with expanded interlayers represents a promising candidate for the electrochemical storage of potassium ions.Hierarchical interlayer-expanded MoS2 assemblies supported on carbon nanotubes are prepared via a straightforward solution method.The increased interlayer spacing not only enables the better accommodation of foreign ions,but also lowers the diffusion energy barrier and improves diffusion kinetics of ions.When investigated as the anode material of potassium ion batteries,our interlayer-expanded MoS2 assemblies exhibit an excellent electrochemical performance with large capacity(up to∼520 mAhg^−1),good rate capability(∼310 mAhg^−1 at 1,000 mAg^−1)and impressive cycling stability,superior to most competitors. | Sijia Di Pan Ding Yeyun Wang Yunling Wu Jun Deng Lin Jia Yanguang Li | 2020 | Nano Research2020，13，1： | 6 |
| 14 | Distribution of major and trace elements in surface sediments of Hangzhou Bay in China显示文摘The Inductively Coupled Plasma Optical Emission Spectrometer was used to analyze sediment samples collected from the Hangzhou Bay to determine major and trace elemental concentrations. Based on these concentrations, the study area can be classified into three geochemical provinces. Province I covers the northern Hangzhou Bay area and contains high concentrations of Al_2 O_3 , Fe_2 O_3 , MgO, Na_2 O, K_2 O, MnO, Cr, Cu, Ni, Pb, V, Co and Zn. Province III is located in the western Hangzhou Bay, near the Qiantang River mouth, and contains high concentrations of SiO_2 , Na_2 O, P_2 O_5 , TiO_2 , Cr, Sr, Zr. Province II is located in the middle and eastern Hangzhou Bay, with the medium concentrations of major and trace elements. The results also demonstrate that the grain size is the dominating factor controlling the spatial variations of elemental concentrations, and the Changjiang River (Yangtze River) and Qiantang River sediments play an important role in the distribution of these elements. Anthropogenic impact on heavy metal concentrations (especially Cr, Sr and Zr) can be detected in the surface sediments near the Qiantang River mouth. | LIU Shengfa LIU Yanguang YANG Gang QIAO Shuqing LI Chaoxin ZHU Zhiwei SHI Xuefa | 2012 | Acta Oceanologica Sinica2012，31，4： | 5 |
| 15 | A New Discovery of ~2.7 Ga Granitic Magmatism in Southeastern Jilin Province, China显示文摘Objective The North China Craton(NCC)is characterized by widespread tectono-thermal events at ca.2.5 Ga,which differs from many other older cratons on Earth,which usually record tectono-thermal events at-2.7 Ga.Therefore,the search for early crustal material,especially rocks within the NCC that record the 2.7 Ga event,is | WANG Chaoyang MENG En LI Yanguang CAI Jia YANG Hong LI Zhuang | 2017 | Acta Geologica Sinica(English Edition)2017，91，5： | 5 |
| 16 | Production of aryl oxygen-containing compounds by catalytic pyrolysis of bagasse lignin over LaTi0.2Fe0.8O3 prepared by different methods显示文摘To realize the resource and high-value utilization,a new approach,named bagasse lignin(BL) used to produce aryl oxygen-containing compounds by catalytic pyrolysis over perovskite,was proposed,LaTi0.2Fe0.8O3(LTF) samples prepared by the sol-gel method(SG) and the solid-state reaction method(SS)were characterized.The catalytic action on BL pyrolysis was performed by the test of TG-DTG and the evaluation of the fixed bed micro-reactor,the components and contents of the products were determined.The results show that LTF samples have cubic perovskite phase,LTF prepared by SG(LTF-SG) is porous with larger specific surface area than LTF prepared by SS(LTF-SS).During the pyrolysis of BL,the addition of LTF lowers the pyrolysis temperature and the activation energy,the contents of CO2 and CO in gaseous products reduce by 4.6%-8.0% and 30.7%-34.3%,respectively,the total content of aryl oxygencontaining compounds(including phenolics,guaiacols,syringols and phenylates) in liquid products increases from 62 wt% to more than 72 wt%,and LTF-SG shows better catalytic performance.LTF samples have nice phase and catalytic stabilities for BL pyrolysis after five successive redox cycles. | Haiying Wang Hongjing Han Enhao Sun Yanan Zhang Jinxin Li Yanguang Chen Hua Song Hongzhi Zhao Yue Kang | 2020 | Journal of Rare Earths2020，38，1： | 5 |
| 17 | Solvent-free nanocasting toward universal synthesis of ordered mesoporous transition metal sulfide@N-doped carbon composites for electrochemical applications显示文摘Transition metal sulfides (TMSs) have a wide range of applications owing to their intriguing properties.Significant efforts have been devoted to nanostructuring TMSs to enhance their properties and performance,still there is a high need in general synthesis of TMS nanostructures.Herein,for the first time,a simple solvent free reactive nanocasting approach that integrates solid precursor loading,in-situ sulfuration and carbonization into a single heating step is developed for the universal synthesis of ordered mesoporous TMS@N-doped carbon composites (denoted as OM-TMS@NCs) with methionine (Met) and metal chlorides as the precursors and the mesoporous silica (SBA-15) as the hard template.A series of OM-TMS@NCs with a hexagonal mesostructure,ultra-high surface areas (430-754 m2·g-1),large pore volumes (0.85-1.32 cm3·g-1),and unique TMS stoichiometries,including MoS2,Fe7S8,Co9S8,NiS,Cu7S4 and ZnS,are obtained.Two distinct structure configurations,namely,highly dispersed ultrathin TMS nanosheets within NCs and TMS@NC co-nanowire arrays,can be obtained depending on different metals.The structure evolution of the OM-TMS@NCs over the solvent-free nanocasting process is studied in detail for a deep understanding of the synthesis.As demonstrations,these materials are promising for electrocatalytic hydrogen evolution reaction and lithium ion storage with high performances. | Jiahui Zhu Zhi Chen Lin Jia Yuqi Lu Xiangru Wei Xiaoning Wang Winston Duo Wu Na Han Yanguang Li Zhangxiong Wu | 2019 | Nano Research2019，12，9： | 5 |
| 18 | Semiconducting 2D Covalent Organic Frameworks: A New Opportunity for Efficient Solar Fuel Production显示文摘Background Over the past century,our heavy dependence on fossil fuels has led to global energy crisis and climate change.As a result,there is an urgent need for developing alternative energy solution.Inspired by the natural photosynthesis,semiconductor-based photocatalytic water splitting and CO2 reduction to chemical fuels driven by solar energy offer a clean and sustainable pathway to alleviate the energy and environmental issues.Among various possibilities,rational design and engineering of the photocatalysts holds the key to achieve the holy goal.At present,the majority of research efforts mainly focus on inorganic semiconductor photocatalysts.Although great achievements have been made,they still suffer from insufficient photocatalytic efficiency far behind people's expectations.New photocatalytic systems are highly desired in order to break through current bottlenecks and advance this field. | Wei Huang Yanguang Li | 2019 | Chinese Journal of Chemistry2019，37，12： | 5 |
| 19 | Depositional environment in the southern Ulleung Basin,East Sea(Sea of Japan),during the last 48000 years显示文摘The present study is based on the sedimentological data from a piston core KCES1 off the southern Ulleung Basin margin,the East Sea(Sea of Japan).The data include sediment color(L*),X-ray radiographs,grain size distribution and AMS14C date.Four kinds of sediments(homogeneous,laminated,crudely laminated and hybrid sediments) are identified according to the characters of the sedimentary structures that were considered to reflect changes in bottom-water oxygenation.Alternations of dark laminated/crudely laminated sediments and light homogeneous sediments represent millennial-scale variations that are possibly associated with the high-resolution changes in the East Asian monsoon(EAM).The relative contributions of the East China Sea Coastal Water(ECSCW) and the Tsushima Warm Current(TWC) were likely the main reasons for the repetition of the anoxic and oxic depositional conditions in the East Sea since the last 48 ka BP.During the interstadial,the strengthen summer EAM was attributed to the expansion of the ECSCW because of more humid climate in central Asia,and then more strongly low-salinity,nutrient-enriched water was introduced into the East Sea.The ventilation of deep water was restricted and therefore the dark laminated layer deposited under the anoxic bottom water condition.During the lowest stand of sea level in the last glacial maximum(LGM),the isolated East Sea dominated by stratified water masses and the euxinic depositional environment formed.The homogenous sediments have been predominating since 17.5 ka BP indicating that the TWC has intruded into the East Sea gradually with the stepwise rise of sea level and the bottom water oxygen level was high.During the late Younger Dryas(YD) period,the last dark laminated layer deposited because the ventilation of bottom water was restricted by stronger summer EAM.The TWC strengthened and the bottom water became oxic again from 10.5 ka BP. | LIU Yanguang SHA Longbin SHI Xuefa SUK Bong-Chool LI Chaoxin WANG Kunshan LI Xiaoyan | 2010 | Acta Oceanologica Sinica2010，29，5： | 4 |
| 20 | Formation of Na_(0.44)MnO_(2) Nanowires via Stress-Induced Splitting of Birnessite Nanosheets显示文摘High aspect ratio Na0.44MnO2 nanowires with a complex one-dimensional(1 D)tunnel structure have been synthesized.We found that the reaction went through layered birnessite nanosheet intermediates,and that their conversion to the final product involved splitting of the nanosheets into nanowires.Based on our observations,a stress-induced splitting mechanism for conversion of birnessite nanosheets to Na0.44MnO2 nanowires is proposed.The final and intermediate phases show topotaxy with〈001〉f//〈020〉b or〈110〉b where frepresents the final Na_(0.44)MnO_(2)phase and b the intermediate birnessite phase.As a result of their high surface areas,the nanowires are efficient catalysts for the oxidation of pinacyanol chloride dye. | Yanguang Li Yiying Wu | 2009 | Nano Research2009，2，1： | 4 |
您所在的机构暂未开通此部分的功能，请联系管理员