|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | U-Pb Zircon and Re-Os Molybdenite Geochronology of the W-Mo Mineralized Region of South Qinling, China, and their Tectonic Implications显示文摘A W-Mo mineralized region is located along the northern margin of the South Qinling tectonic belt of China. WMo mineralization occurs mainly in Cambrian–Ordovician clastic and carbonate rocks, and the ore bodies are structurally controlled by NW–SE-and NNE–SSW-striking faults. Evidence for magmatism in the area is widespread and is dominated by intermediate–felsic intrusives or apophyses, such as the Dongjiangkou, Yanzhiba, Lanbandeng, and Sihaiping granitic bodies. Quartz-vein-type mineralization and fault-controlled skarn-type mineralization dominate the ore systems, with additional enrichment in residual deposits. At present, there are few or insufficient studies on(1) the age of mineralization,(2) the relationship between intermediate–felsic granite and W-Mo mineralization,(3) the source of ore-forming materials, and(4) the metallogenic and tectonic setting of the mineralized area. In this paper, we present geochronology results for numerous intrusive granitic bodies in the South Qinling tectonic belt. U-Pb zircon geochronology of the Lanbandeng monzogranite and Wangjiaping biotite monzogranite yields ages of 222.7 ± 2.3 and 201.9 ± 1.8 Ma, respectively. In contrast to the Late Triassic age of the Lanbandeng monzogranite, the age of the newly discovered Wangjiaping biotite monzogranite places it at the Triassic–Jurassic boundary. Re-Os molybdenite geochronology on the Qipangou W-Mo deposit yielded a model age of 199.7 ± 3.9 Ma, indicating the deposit formed in the early Yanshanian period of the Early Jurassic. Granitoid intrusions in the mineralized area are characterized by composite granite bodies that crystallized at ca. 240–190 Ma. While there were multiple stages of intrusion, most occurred at 210–220 Ma, with waning magmatic activity at 200–190 Ma. The Re-Os age of molybdenite in the region is ca. 200–190 Ma, which may represent a newly discovered period of W-Mo metallogenesis that occurred during the final stages of magmatism. The heat associated with this magmatism drove ore formation and might have provided additional ore-forming components for metallogenesis(represented by the Wangjiaping biotite monzogranite). Ore materials in the mineralized area were derived from mixed crustal and mantle sources. Enrichment of the region occurred during intracontinental orogenesis in the late Indosinian–Yanshanian, subsequent to the main Indosinian collision. At this time, the tectonic environment was dominated by extension and strike-slip motion. | HAN Ke YANG Xingke CHAO Huixia HE Hujun RUAN Shiqi GAO Yunfeng ZHANG Weisheng ZHU Wei JIN Gang | 2021 | Acta Geologica Sinica(English Edition)2021，95，2： | 3 |
| 2 | Design and im- plementation of mine-map management information system based on B/S model显示文摘 | He Hujun Yan Yumei Li Wanling | 2012 | Applied Mechanics and Materials2012，，12： | 1 |
| 3 | Effects of doping FeCl3 on hydrogen storage properties of Li-N-H system显示文摘The effects of doping FeCl_3 on the LiNH_2-2LiH system were investigated systematically. FeCl_3 was prior to react with LiH during ball milling their mixtures. The metallic Fe, which is generated from metathesis reaction between FeCl_3 and LiH, plays an important role on improving the dehydrogenation kinetics of LiNH_2-2LiH system. The results indicated that the dehydrogenation peak and ending temperatures of the doped 1 mol%FeCl_3 sample shifted to low temperatures, and the dehydrogenation active energy changed from 102.45 k J/mol to 87.52 k J/mol. While increasing the amount of FeCl_3, an excess of LiCl, the by-product of metathesis reaction between FeCl_3 and Li H, can stabilize LiNH_2 and thus hinder hydrogen desorption. The dehydrogenation product is a new solid cubic phase solution of lithium imide-chloride. The high limit of the solid solution of LiCl and Li_2NH is near the molar ratio of 1:1. | Weijin Zhang Han Wang Hujun Cao Teng He Jianping Guo Guotao Wu Ping Chen | 2017 | Progress in Natural Science:Materials International2017，27，1： | 1 |
| 4 | Evolutionary Computation Based Optimization of Image Zernike Moments Shape Feature Vector显示文摘图象形状特征能到图象 Zernike 时刻被描述。在这篇论文,我们指出高尺寸图象 Zernike 时刻塑造的问题特征向量能描述原来的图象的更多的详细,但是有太多元素为下一个图象分析阶段造成麻烦。然后,低尺寸图象 Zernike 时刻形状特征向量应该被改进并且优化了描述原来的图象的更多的详细。优化算法因此基于进化计算被设计并且在这篇论文实现了解决这个问题。试验性的结果表明优化算法的可行性。 | LIU Maofu HU Hujun ZHONG Ming HE Yanxiang HE Fazhi | 2008 | Wuhan University Journal of Natural Sciences2008，13，2： | 1 |
| 5 | Defect-rich potassium amide: A new solid-state potassium ion electrolyte显示文摘One of the major obstacles to the application of potassium-ion batteries in large-scale energy storage is the lack of safe and effective electrolytes.KNH_(2),a new potassium-ion solid electrolyte has been developed in this study.Its ionic conductivity reaches 4.84×10^(-5)S cm^(-1)at 150°C and can reach3.56×10^(-4)S cm^(-1)after mechanochemical treatment.The result from electron paramagnetic resonance(EPR) measurement shows that the increment of ionic conductivity is dependent on the concentration of nitrogen defects in the KNH_(2) electrolyte.To the best of our knowledge,this is the first report that adopts inorganic amide as an electrolyte for potassium-ion battery and initiates the search for a new amidebased solid electrolyte for an all-solid-state potassium-ion battery. | Jiang Wang Gangtie Lei Teng He Hujun Cao Ping Chen | 2022 | Journal of Energy Chemistry2022，31，6： | 1 |
| 6 | NaH doped TiO_(2)as a high-performance catalyst for Mg/MgH_(2)cycling stability and room temperature absorption显示文摘This paper presents the catalytic effect of NaH doped nanocrystalline TiO_(2)(designated as NaTiOxH)in the improvement of MgH_(2)hydrogen storage properties.The catalyst preparation involves ball milling NaH with TiO_(2)for 3 hr.The addition of 5 wt%NaTiOxH powder into MgH_(2)reduces its operating temperature to∼185℃,which is∼110℃lower than the additive-free as-milled MgH_(2).The composite remarkably desorbs∼7.2 wt%H_(2)within 15 min at∼290℃and reabsorbs∼4.5 wt%H_(2)in 45 min at room temperature under 50 bar H_(2).MgH_(2)dehydrogenation is activated at 57 kJ/mol by the catalyst.More importantly,the addition of 2.5 wt%NaTiOxH catalyst aids MgH_(2)to reversibly produce∼6.1 wt%H_(2)upon 100 cycles within 475 hr at 300℃.Microstructural investigation into the catalyzed MgH_(2)composite reveals a firm contact existing between NaTiOxH and MgH_(2)particles.Meanwhile,the NaTiOxH catalyst consists of catalytically active Ti_(3)O_(5),and“rod-like”Na_(2)Ti_(3)O_(7)species liberated in-situ during preparation;these active species could provide multiple hydrogen diffusion pathways for an improved MgH_(2)sorption process.Furthermore,the elemental characterization identifies the reduced valence states of titanium(Ti<4+)which show some sort of reversibility consistent with H_(2)insertion and removal.This phenomenon is believed to enhance the mobility of Mg/MgH_(2)electrons by the creation and elimination of oxygen vacancies in the defective(TiO_(2-x))catalyst.Our findings have therefore moved MgH_(2)closer to practical applications. | Joshua Adedeji Bolarin Zhao Zhang Hujun Cao Zhi Li Teng He Ping Chen | 2023 | Journal of Magnesium and Alloys2023，11，8： | 0 |
| 7 | Aromatic chloroosmacyclopentatrienes显示文摘Aromatic metallacycles are of considerable current interest.Reported aromatic metallacycles are mainly those with carbon,nitrogen,oxygen and sulfur.In this work,we report the synthesis and characterization of aromatic chloroosmacyclopentatrienes,which represent the first structurally confirmed metallaaromatic with a chlorine atom in its framework.Single-crystal X-ray diffraction studies show that these planar chloroosmacyclopentatrienes possess a very short Os-CIC distance suggesting M=CIC bond character. | Zhenwei Chu Guomei He Chuan Shi Yuhui Hua Yaxi Huang Jiangxi Chen Hujun Xie Guochen Jia | 2023 | National Science Review2023，10，3： | 0 |
| 8 | The Roles of Alkali/Alkaline Earth Metals in the Materials Design and Development for Hydrogen Storage显示文摘CONSPECTUS:Hydrogen storage for onboard applications has been recognized as a grand challenge for the large-scale implementation of hydrogen fuel cell vehicles.Tremendous research efforts have thus been devoted to the design and development of hydrides of lightweight elements(HLEs).A prominent feature of these materials is the indispensable ingredient of alkali/alkaline earth cations.Alkali alkaline earth metals(AMs)are highly reactive and have a rich coordination chemistry.As a matter of fact,an AM cation can form a complete range of compounds with hydrogenous anions,such as H−,[NH2]−,[BH4]−,[AlH4]−,[NH2BH3]−,[TMHX]−,[R-CH2−NH]−,[R-CH2−O]−,etc.,and,thus,tune the Al−H,N−H,B−H,and C−H bond strengths for hydrogen storage.In this Account,our research efforts in the development of AM amide-hydride composites,AM amidoboranes,and metalorganic hydrides for hydrogen storage are reviewed.A partial substitution of the H in NH3 by AM gives rise to solid AM amides or imides.Those compounds can react with AM hydride(AMH)to produce H2.This is driven by the redox reaction between a protic H(N)and hydridic H(AM).A variety of amide-hydride composites holding promise for hydrogen storage were thus developed,including LiNH2-hydride,Mg(NH2)2-hydride,and complex amide-hydride composites.For amidoboranes,the substitution of H(N)in ammonia borane(AB)by AM transforms the molecular crystal AB into amidoboranes with an ionic crystal structure,leading to significant changes in terms of charge distribution,bond length,intermolecular forces,and so on,which in turn results in enhanced dehydrogenation properties.For metalorganic hydrides,through reacting AM compounds(usually AM hydride)with aliphatic,carbocyclic,or heterocyclic organic hydrides having“reactive protic H”,corresponding metalorganic hydrides are formed.Because of the electron-donating nature of AM,the strengths of the C−H bond in metal-organic hydrides can be modulated.For each material system,we will introduce the synthesis of materials,show their performances,correlate the hydrogen storage property to a crystal and/or electronic structure,and especially highlight the functions of AM in tuning the thermodynamic and/or kinetic properties of HLEs.At the end of the Account,challenges and a future research direction of the hydrogen storage field are discussed. | Teng He Hujun Cao Ping Chen | 2021 | Accounts of Materials Research2021，2，9： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员