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内蒙古东乌旗沙麦钨矿床成矿机制:来自流体包裹体及稳定同位素的证据

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地质与勘探 2024年第4期60卷 685-699页

作者：吴皓然李怀彬谢玉玲崔凯姚远中国冶金地质总局矿产资源研究院北京101300 北京科技大学土木与资源工程学院北京100083

内蒙古东乌旗沙麦钨矿床位于中亚巨型缝合带的最东段,矿床内广泛发育云英岩化,钨矿体主要受NW向断裂构造控制,呈黑钨矿-石英脉状产出在燕山期沙麦岩体(岩性主要为黑云母二长花岗岩)和泥盆系围岩地层(岩性主要为角岩化砂岩、砂砾岩)中。... 详细信息

内蒙古东乌旗沙麦钨矿床位于中亚巨型缝合带的最东段,矿床内广泛发育云英岩化,钨矿体主要受NW向断裂构造控制,呈黑钨矿-石英脉状产出在燕山期沙麦岩体(岩性主要为黑云母二长花岗岩)和泥盆系围岩地层(岩性主要为角岩化砂岩、砂砾岩)中。成矿阶段从早到晚分别为:石英-黄玉阶段(Ⅰ)、云英岩-黑钨矿阶段(Ⅱ)和晚期硅化阶段(Ⅲ)。本文对矿床流体包裹体及C-H-O-S同位素进行了研究,结果显示:矿床中普遍发育CO_(2)-H_(2)O包裹体及水溶液气液两相流体包裹体。从成矿早期至成矿晚期,矿床流体中富CO_(2)包裹体逐渐减少,CO_(2)含量逐渐降低。成矿早期可见熔体包裹体与流体包裹体共存的现象,属低盐度、富CO_(2)的岩浆来源流体。矿床成矿作用从早到晚,流体包裹体均一温度分别为279~341℃、196~286℃、103~201℃;流体盐度分别为(1.6~9.1)%NaCleq、(3.0~11.1)%NaCleq、(0.9~4.7)%NaCleq。激光拉曼光谱分析结果显示,流体中的气相主要是CO_(2),部分含有H_(2)O和ch_(4)。成矿流体从早期中高温、中盐度流体向晚期低温、低盐度流体演化,属NaCl-H_(2)O-CO_(2)±ch_(4)热液体系。矿床稳定同位素研究表明,沙麦钨矿床的成矿流体主要来源于岩浆水,并在成矿晚期混入了大气水。矿床硫的来源与早白垩世岩浆-热液系统或深部幔源岩浆相关,并混入了部分地层硫。综合分析认为,沙麦钨矿为一岩浆期后热液型钨矿床。燕山期侵入体从深部携带成矿物质,经历了岩浆分异和流-熔体相互作用等过程,形成区内岩浆-热液成矿系统。流体的不混溶是导致含钨络合物分解乃至最后沉淀成矿的主要原因。

关键词：流体包裹体激光拉曼光谱 C-H-O-S同位素沙麦钨矿东乌旗内蒙古

In-Situ FT-IR Investigation Methane to Syngas over of Partial Oxidation of Rh/SiO2 Catalyst

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Journal of Natural Gas chemistry 2007年第3期16卷 316-321页

作者： Tinghua wu Dongmin Lin Ying wu Xiaoping Zhou Qiangu Yan Weizheng Weng Huilin Wan Zhejiang Key Laboratory for Reactive chemistry on Solid Surfaces Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 Zhejiang China State Key Laboratory for Physical chemistry of Solid Surfaces Xiamen University Xiamen 361005 Fujian China Center for Advanced Vehicular Systems Box 5405 Mississippi State University Starkville MS39762 USA

Partial oxidation of methane to syngas （POM） over Rh/SiO2 catalyst was investigated using in-situ FT-IR. When methane interacted with 1.0wt%Rh/SiO2 catalyst, it was dissociated to adsorbed hydrogen and chx species. The adsorbed hydrogen atoms were transferred to SiO2 surface by ＂spill-over＂ and reacted with lattice oxygen to form surface -OH species. POM mechanism was investigated over Rh/SiO2 catalyst using in-situ FT-IR. It was found that CO2 was formed before CO could be detected when ch4 and O2 were introduced over the preoxidized Rh/SiO2 catalyst, whereas CO was detected before CO2 was formed over the prereduced Rh/SiO2 catalyst.

关键词： partial oxidation syngas Rh/SiO2 catalyst in-situ FT-IR

Highly Efficient Photothermocatalytic CO_(2) Reduction in Ni/Mg-Doped Al_(2)O_(3) with High Fuel Production Rate, Large Light-to-Fuel Efficiency, and Good Durability

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Energy & Environmental Materials 2022年第2期5卷 582-591页

作者： Xin Tan Shaowen wu Yuanzhi Li Qian Zhang Qianqian Hu Jichun wu An Zhang Yongdi Zhang State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China

A novel nanocomposite of Ni nanoparticles loaded on Mg-doped Al_(2)O_(3)(Ni/Mg-Al_(2)O_(3))was *** photothermocatalytic CO_(2) reduction with methane(CRM)merely using focused UV-vis-IR illumination on Ni/Mg-Al_(2)O_(3),high production rates of H_(2)(r_(H2),69.71 mmol min^(−1) g^(−1))and CO(rCO,74.57 mmol min^(−1) g^(−1))and an extremely large light-to-fuel efficiency(η,32.9%)are *** rH2 and rCO(51.07 and 59.66 mmol min^(−1) g^(−1))and a largeη(32.5%)are acquired even by using focusedλ>560 nm vis-IR ***/Mg-Al_(2)O_(3) shows good durability for photothermocatalytic CRM due to the side reaction of carbon deposition being enormously inhibited in comparison with a reference catalyst of Ni nanoparticles loaded on Al_(2)O_(3).The enormous carbon deposition inhibition is ascribed to the presence of a fence of CO_(2) molecules(strongly adsorbed on Mg-doped Al_(2)O_(3))around Ni nanoparticles,which block the polymerization and growth of carbon species to nanofibers by promoting the oxidation of carbon species formed by ch_(4) *** high photothermocatalytic activity of Ni/Mg-Al_(2)O_(3) arises from efficient light-driven thermocatalytic CRM.A photoactivation is found to considerably raise the photothermocatalytic activity of Ni/Mg-Al_(2)O_(3) because of the apparent activation energy(Ea)being substantially decreased upon focused *** Ea reduction is associated with the rate-determining steps of CRM(e.g.,ch_(4) dissociation and the oxidation of carbon species)being accelerated upon focused illumination.

关键词： CO_(2)reduction light-to-fuel efficiency Ni/Mg-Al_(2)O_(3)nanocomposite photocatalytic photothermocatalytic

Laser ablation of block copolymers with hydrogen-bonded azobenzene derivatives

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Frontiers of chemical Science and Engineering 2018年第3期12卷 450-456页

作者： Jintang Huang Youju Huang Si wu Max Planck Institute for Polymer Research Aekermannweg 10 55128 Mainz Germany Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistrY/ Anhui Key Laboratory ofOptoelcctronic Science and Technology Innovation Centre of Chemistry for Energy Materials Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 China

Supramolecular assemblies （PS-b-P4VP （AzoR）） are fabricated by hydrogen-bonding azobenzene derivatives （AzoR） to poly（4-vinyl pyridine） blocks of polystyrene-block-poly（4-vinyl pyridine）（PS-b-P4VP）. PS-b-P4VP（AzoR） forms phase separated nanostructures with a period of-75-105 nm. A second length scale structure with a period of 2μm is fabricated on phase separated PS-b-P4VP（AzoR） by laser interference abla- tion. Both the concentration and the substituent of AzoR in PS-b-P4VP（AzoR） affect the laser ablation process. The laser ablation threshold of PS-b-P4VP（AzoR） decreases as the concentration of AzoR increases. In PS-b-P4VP（AzoR） with different substituents （R = CN, H, and ch3）, ablation thresholds follow the trend： PS-b-P4VP（AzoCN）〈 PS-b- P4VP（Azoch3）〈PS-b-P4VP（AzoH）. This result indicates that the electron donor group （ch3） and the electron acceptor group （CN） can lower the ablation threshold of PS-b-P4VP（AzoR）.

关键词： laser ablation block copolymers hydrogen-bond azobenzene derivatives supramolecular assembly

水口水库与下游闽江河段水-气界面温室气体排放特征及影响因素探究

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当代化工研究 2024年第19期 104-106页

作者：吴碧婕庄凯玥福建师范大学环境与资源学院福建350007

为探究水库大坝修建对河流型水库及其下游河段温室气体排放特征的影响,作者于2023年夏(8月)、秋季(11月)对水口水库和下游闽江河段进行温室气体监测。采用薄边界层模型计算温室气体排放通量,N_(2)O排放通量为0.567~1.524μmol·m^(-2)·... 详细信息

为探究水库大坝修建对河流型水库及其下游河段温室气体排放特征的影响,作者于2023年夏(8月)、秋季(11月)对水口水库和下游闽江河段进行温室气体监测。采用薄边界层模型计算温室气体排放通量,N_(2)O排放通量为0.567~1.524μmol·m^(-2)·h^(-1),CO_(2)排放通量为0.793~6.683 mmol·m^(-2)·h^(-1),ch_(4)排放通量为1.495~11.849μmol·m^(-2)·h^(-1)。通过相关性分析筛选出主要影响因子为水温、DO、NH_(3)^(-)N、NO_(3)^(-)N、TN。研究表明大坝拦截对温室气体排放具有一定程度的影响。

关键词：闽江水口水库水-气界面温室气体

Joint Task Scheduling, Resource Allocation, and UAV Trajectory under Clustering for FANETs

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china Communications 2022年第1期19卷 104-118页

作者： Wenjing You chao Dong Qihui wu Yuben Qu Yulei wu Rong He The Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information TechnologyNanjing University of Aeronautics and AstronauticsNanjing 211106China AVIC chengdu Aircraft Design and Research Institute China

This paper establishes a new layered flying ad hoc networks(FANETs) system of mobile edge computing(MEC) supported by multiple UAVs,where the first layer of user UAVs can perform tasks such as area coverage, and the second layer of MEC UAVs are deployed as flying MEC sever for user UAVs with computing-intensive tasks. In this system, we first divide the user UAVs into multiple clusters, and transmit the tasks of the cluster members(CMs) within a cluster to its cluster head(ch). Then, we need to determine whether each ch’ tasks are executed locally or offloaded to one of the MEC UAVs for remote execution(i.e., task scheduling), and how much resources should be allocated to each ch(i.e., resource allocation), as well as the trajectories of all MEC *** formulate an optimization problem with the aim of minimizing the overall energy consumption of all user UAVs, under the constraints of task completion deadline and computing resource, which is a mixed integer non-convex problem and hard to solve. We propose an iterative algorithm by applying block coordinate descent methods. To be specific, the task scheduling between ch UAVs and MEC UAVs, computing resource allocation, and MEC UAV trajectory are alternately optimized in each iteration. For the joint task scheduling and computing resource allocation subproblem and MEC UAV trajectory subproblem, we employ branch and bound method and continuous convex approximation technique to solve them,respectively. Extensive simulation results validate the superiority of our proposed approach to several benchmarks.

关键词： flying ad hoc networks(FANETs) successive convex approximation clustering mobile edge computing(MEC)

Wavelike perturbations in Titan’s ionosphere and their compositional variation:A preliminary survey of Cassini Ion Neutral Mass Spectrometer measurements

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Earth and Planetary Physics 2022年第6期6卷 522-528页

作者： ShiQi wu DanDan Niu WeiQin Sun XiaoShu wu HaoYu Lu Jun Cui School of Space and Environment Beihang UniversityBeijing 100191China Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518055GuangdongChina Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082GuangdongChina Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

Wavelike perturbations in the ionosphere of Titan,the largest satellite of Saturn,are explored based on the Cassini Ion Neutral Mass Spectrometer(INMS)*** wavelike perturbations are identified for more than twenty ion species,from simple ones such as N^(+)and ch_(4)^(+)to complex ones such as C_(2)H_(3)CNH^(+)and C_(4)H_(7)^(+).Simultaneous wavelike perturbations in background N_(2),indicative of atmospheric gravity waves,are also observed,motivating us to speculate that the INMS-derived ion perturbations are *** amplitudes of the ion perturbations are found to be larger than that of the N_(2)*** compositional variation is revealed by the data:heavier ion species exhibit greater *** observations might be understood based on considerations either of force balance or chemical loss in Titan’s ionosphere.

关键词： Titan atmospheric gravity waves ionospheric perturbations ionospheric composition Cassini

Construction of CuNiAl-LDHs electrocatalyst with rich-Cu^(+)and—OH for highly selective reduction of CO_(2) to methanol

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chinese Journal of chemical Engineering 2023年第12期64卷 156-167页

作者： Gaiqin Miao Lifei Liu Xia An Xu wu College of chemistry Taiyuan University of TechnologyTaiyuan 030024China

In this work,a high-performance CuNiAl-LDHs catalyst was innovatively synthesized for electrochemical carbon dioxide reduction(CO_(2)RR)of methanol(ch3OH)through the modulated synthesis of Cu-based layered double hydroxide(LDHs).It was found that the optimal CuNiAl-LDHs has superior ch3OH selectivity compared to CuAl-LDHs and CuMgAl-LDHs,with the Faraday efficiency(FE)of 76.4%for ch3OH generation at1.2 *** their FE and current density(4.8 mA·cm^(2))remained stable during up to 24 h of ***,this study confirms the significant performance advantages of CuNiAlLDHs over their derived composite *** characterization further proves that the excellent catalytic performance of CuNiAl-LDHs is importantly associated with their richness in Cu+and hydroxyl group(-OH).The research expands the application fields of LDHs ***,the series of discoveries provide a new insight for the preparation of ch3OH by constructing CO_(2)RR.

关键词： Electrocatalysis CO_(2)reduction Methanol CuNiAl layered-double hydroxides Hydroxyl group

Syntheses and Crystal Structures of Cobalt(II) chloride Complexes of 1,3-Bis(pyridyl-4-ylthio)propan-2-one

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chinese Journal of Structural chemistry 2006年第5期25卷 511-516页

作者： wu Ben-Lai wu Ming-Yan GONG Ya-Qiong chEN Bai-Quan HONG Mao-chun State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

Reactions of 1,3-bis（pyridyl-4-ylthio）propan-2-one L and COCl2·6H2O under different conditions gave two new cobalt（Ⅱ）-chloride-L complexes with distinct structures. Complex [Co（L）2Cl2]·0.5ch3OH}n 1 prepared by solvothermal treatment is a 3D network, whereas complex {[Co3（L）2Cl6（DMF）4]·2ch3OH·H2O} 2 obtained in DMF-diethyl ether system is a discrete acyclic trimer. Crystal data for 1： space group lbca, a = 15.993（4）, b = 18.454（5）, c = 21.506（6）A, V= 6347（3） ,A^3, Z = 8, Dc = 1.462 g/cm^3,μ = 1.005 mm^-1, F（000） = 2864, C26.5H26Cl2CoN4O2.5S4, Mr = 698.58, the final R = 0.0499 and wR = 0.1024. Crystal data for 2： space group P1^-, a = 9.9177（6）, b = 11.0871 （4）, c = 15.5490（12） ,A, α = 83.1834（14）,β = 88.910（13）, γ = 71.096（ 11 ）°, V = 1605.8（2） A^3, Z = 1, Dc = 1.362 g/cm^3,μ= 1.194 mm^-1, F（000） = 677, C40H62Cl6Co3N8O9S4, Mr = 1316.71, the final R = 0.0666 and wR =0.1575.

关键词： cobalt chloride complex 1,3-bis(pyridyl-4-ylthio)propan-2-one crystal structure