检索结果-南通市图书馆

Isolated atomic catalysts encapsulated in MOF for ultrafast water pollutant treatment

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第5期14卷 1287-1293页

作者： shuailong Guo Hao Yuan Wei Luo Xiaoqing Liu Xiantao Zhang Haoqing Jiang feng Liu Gary J.Cheng The Institute of Technological Sciences Wuhan UniversityWuhan430072China Birck Nanotechnology Centre School of Industrial EngineeringPurdue UniversityWest LafayetteIN47906USA School of Power and Mechanical Engineering Wuhan UniversityWuhan430072China Center for materials research and analysis Wuhan University of TechnologyWuhan430072China

Atomic noble metals stand as one of the most advanced catalysts because of their unique properties and interaction with the ***,due to their high activity,noble atomic catalysts tend to aggregate and deactivate in practical ***,supports aimed to disperse these atomic catalysts often suffer from weak confinement and poor porosity,thus limited the catalytic efficiency of noble ***,we report the facile encapsulation of atomic noble catalyst in cheap cerous metal-organic framework(Ce-MOF)crystals to create a robust catalyst that could deliver high catalytic performance for the reduction of 4-nitrophenol without decay in long-term cycling ***,Au atoms encapsulated in Ce-MOF exhibited ultrahigh turnover frequency(TOF)of 131 min−1 for the reduction of 4-nitrophenol in minutes,consuming only 10%precious metals compared with state-of-the-art catalysts operated under same condition.

关键词： atomic catalysts metal-organic framework reduction of 4-nitrophenol porous

Mapping essential urban land use categories in China(EULUC-China):preliminary results for 2018

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2020年第3期65卷 182-187页

作者： Peng Gong Bin Chen Xuecao Li Han Liu Jie Wang Yuqi Bai Jingming Chen Xi Chen Lei Fang shuailong feng Yongjiu feng Yali Gong Hao Gu Huabing Huang Xiaochun Huang Hongzan Jiao Yingdong Kang Guangbin Lei Ainong Li Xiaoting Li Xun Li Yuechen Li Zhilin Li Zhongde Li Chong Liu Chunxia Liu Maochou Liu Shuguang Liu Wanliu Mao Changhong Miao Hao Ni Qisheng Pan Shuhua Qi Zhehao Ren Zhuoran Shan Shaoqing Shen Minjun Shi Yimeng Song Mo Su Hoi Ping Suen Bo Sun Fangdi Sun Jian Sun Lin Sun Wenyao Sun Tian Tian Xiaohua Tong Yihsing Tseng Ying Tu Hong Wang Lan Wang Xi Wan Zongming Wang Tinghai Wu Yaowen Xie Jian Yang Jun Yang Man Yuan Wenze Yue Hongda Zeng Kuo Zhang Neng Zhang Tao Zhang Yu Zhang feng Zhao Yichen Zheng Qiming Zhou Nicholas Clinton Zhiliang Zhu Bing Xu Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Tsinghua Urban Institute Tsinghua UniversityBeijing 100084China Center for Healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing 100084China Department of Land Air and Water ResourcesUniversity of CaliforniaDavisCA 95616-8627USA Department of Geological and Atmospheric Sciences Iowa State UniversityAmesIA 50011USA State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China AI for Earth Laboratory Cross-Strait InstituteTsinghua UniversityBeijing 100084China International Institute for Earth System Sciences Nanjing UniversityNanjing 210093China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumchi 830011China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China National Engineering Laboratory for Applied Technology in Forestry&Ecology in South China College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004China College of Surveying&Geo-Informatics Tongji UniversityShanghai 200092China Department of Urban Planning College of Architecture and Urban PlanningTongji UniversityShanghai 200092China Beijing Institute of Urban Planning Beijing 100045China Department of Urban Planning School of Urban DesignWuhan UniversityWuhan 430072China College of Earth Sciences Jilin UniversityChangchun 130061China Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Urban and Regional Planning School of Geography and PlanningSun Yat-sen Univ

Land use reflects human activities on *** land use is the highest level human alteration on Earth,and it is rapidly changing due to population increase and *** areas have widespread effects on local hydrology,climate,biodiversity,and food production[1,2].However,maps,that contain knowledge on the distribution,pattern and composition of various land use types in urban areas,are limited to city *** mapping standard on data sources,methods,land use classification schemes varies from city to city,due to differences in financial input and skills of mapping *** address various national and global environmental challenges caused by urbanization,it is important to have urban land uses at the national and global scales that are derived from the same or consistent data sources with the same or compatible classification systems and mapping *** is because,only with urban land use maps produced with similar criteria,consistent environmental policies can be made,and action efforts can be compared and assessed for large scale environmental ***,despite of the fact that a number of urban-extent maps exist at global scales[3,4],more detailed urban land use maps do not exist at the same *** at big country or regional levels such as for the United States,China and European Union,consistent land use mapping efforts are rare[5,6](e.g.,https://***/open_land_use/).

关键词： EULUC-China 土地利用类型

Erratum to: Isolated atomic catalysts encapsulated in MOF for ultrafast water pollutant treatment

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第7期14卷 2467-2468页

作者： shuailong Guo Hao Yuan Wei Luo Xiaoqing Liu Xiantao Zhang Haoqing Jiang feng Liu Gary J.Cheng The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Birck Nanotechnology Centre School of Industrial EngineeringPurdue UniversityWest LafayetteIN 47906USA School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China Center for materials research and analysis Wuhan University of TechnologyWuhan 430072China

Three vertical axes in Fig. 4 and Figs. S8 and S9 in the Electronic Supplementary Material (ESM) were unfortunately mislabeled.

关键词：

离子色谱法测定汽车尾气净化催化剂中Cl^-和NO_3^-的含量

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

理化检验（化学分册） 2017年第5期53卷 615-619页

作者：冯璐方卫郭帅龙金娅秋王腾邢银娟昆明贵金属研究所昆明650106 贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室昆明650106

汽车尾气净化催化剂样品(0.5g),用3%(体积分数)氨水溶液(30mL)超声提取。所得提取液中的Cl-和NO_3^-用IonPac AS11-HC(4mm×250mm)作为分离柱,以17mmol·L^(-1)氢氧化钾溶液为淋洗液进行色谱分离,用抑制型电导检测器测定。Cl-和NO_3^-... 详细信息

汽车尾气净化催化剂样品(0.5g),用3%(体积分数)氨水溶液(30mL)超声提取。所得提取液中的Cl-和NO_3^-用IonPac AS11-HC(4mm×250mm)作为分离柱,以17mmol·L^(-1)氢氧化钾溶液为淋洗液进行色谱分离,用抑制型电导检测器测定。Cl-和NO_3^-的质量浓度均在0.1~10.0 mg·L^(-1)内与其对应的峰高呈线性关系,Cl^-和NO_3^-的检出限依次为0.004,0.019mg·L^(-1)。方法用于实际样品分析,并进行加标回收试验,测得回收率在98.8%~116%之间,测定值的相对标准偏差(n=7)不大于2.0%。

关键词：离子色谱法超声波提取汽车尾气净化催化剂

在线全文

学校读者我要写书评

暂无评论

充填节理岩体中应力波传播特性研究

合肥工业大学学报（自然科学版） 2021年第8期44卷 1073-1081页

作者：贾帅龙王志亮熊峰田诺成卢志堂合肥工业大学土木与水利工程学院安徽合肥230009 合肥工业大学资源与环境工程学院安徽合肥230009

在考虑节理接触面与充填材料共同变形的前提下,文章基于时域递归法推导了应力波在充填节理处的传播方程,并对其进行了对比验证;分析了节理接触界面刚度、节理厚度及入射角度对波在充填节理处传播特性的影响规律;依据应力均匀性假定,将... 详细信息

在考虑节理接触面与充填材料共同变形的前提下,文章基于时域递归法推导了应力波在充填节理处的传播方程,并对其进行了对比验证;分析了节理接触界面刚度、节理厚度及入射角度对波在充填节理处传播特性的影响规律;依据应力均匀性假定,将充填节理简化为不考虑厚度的位移不连续模型,考察了充填节理法向与切向力学性质的变化规律。结果表明:所推导的波传播方程计算值与相关研究结果吻合较好,通过迭代可求出反射波与透射波的数值解;在相同的节理厚度和波入射角度下,透射系数随节理接触界面刚度的增加而增大,反射系数则逐渐减小;不同节理厚度下等效法向与切向刚度均随接触面刚度的增加而增大,而随节理厚度增加,等效法向与切向刚度呈降低趋势。研究结果对揭示应力波在节理岩体中传播规律具有一定参考价值。

关键词：应力波时域递归法充填节理接触界面刚度位移不连续模型

Ba_3Y(PO_4)_3∶Dy^(3+),Eu^(3+)单基质白光荧光粉的制备与发光性能

在线全文

学校读者我要写书评

暂无评论

应用化学 2017年第10期34卷 1186-1194页

作者：李帅龙刘小明唐星华冯景春谢伟杰南昌航空大学环境与化学工程学院南昌330063

为了探究在Dy^(3+)掺杂Ba_3Y(PO_4)_3荧光粉中共掺Eu^(3+)离子对其发光性能的影响,我们采用传统高温固相法制备了一系列Dy^(3+)、Eu^(3+)单掺杂和共掺杂Ba_3Y(PO_4)_3荧光粉。通过X射线衍射(XRD)、荧光发射光谱和荧光衰减曲线对样品进... 详细信息

为了探究在Dy^(3+)掺杂Ba_3Y(PO_4)_3荧光粉中共掺Eu^(3+)离子对其发光性能的影响,我们采用传统高温固相法制备了一系列Dy^(3+)、Eu^(3+)单掺杂和共掺杂Ba_3Y(PO_4)_3荧光粉。通过X射线衍射(XRD)、荧光发射光谱和荧光衰减曲线对样品进行了表征。结果表明,所制备的荧光粉呈闪铋矿立方相。在近紫外光激发下,Ba_3Y(PO_4)_3∶Dy^(3+)发射光谱在487和578 nm处有两个窄带发射峰,呈冷白光发射;Ba_3Y(PO_4)_3∶Eu^(3+)发射光谱的窄带发射位于594和616 nm处,呈发橙红光。在Ba_3Y(PO_4)_3∶Dy^(3+),Eu^(3+)中,由于Eu^(3+)离子补偿Dy^(3+)冷白光发射所缺的红色组分,从而实现了色纯度高、色温适中的暖白光发射。进一步探索了Ba_3Y(PO_4)_3∶Dy^(3+),Eu^(3+)荧光粉发光机理。所制备的Ba_3Y(PO_4)_3∶Dy^(3+),Eu^(3+)单基质白光荧光粉在白光近紫外激发白光二极管(UVWLED)领域具有潜在应用价值。

关键词： Ba3Y(PO4)3∶Dy^3+,Eu^3+ 白光荧光粉能量传递

片状银粉的制备及在电子浆料中的应用研究进展

在线全文

学校读者我要写书评

暂无评论

材料导报 2017年第A1期31卷 273-276页

作者：孟宪伟胡昌义冯清福郭帅龙杨宏伟杨宇雯李郁秀冯璐昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室昆明650106

近年来,随着电子和信息的高速发展,对电子浆料的性能要求越来越高。导电填料作为导电浆料的重要组成部分,决定了浆料的性能。本文介绍了有着广泛应用的金属系导电填料——银粉,概述了银粉的尺寸和形貌对导电浆料的影响,阐述了不同制备... 详细信息

近年来,随着电子和信息的高速发展,对电子浆料的性能要求越来越高。导电填料作为导电浆料的重要组成部分,决定了浆料的性能。本文介绍了有着广泛应用的金属系导电填料——银粉,概述了银粉的尺寸和形貌对导电浆料的影响,阐述了不同制备方法获得的片状银粉对电子浆料性能的影响,并探讨了存在的问题。

关键词：电子浆料填料超细片状银粉制备方法

在线全文

学校读者我要写书评

暂无评论

动态冲击下锦屏大理岩力学响应与能量特性

水文地质工程地质 2022年第5期49卷 112-118页

作者：李傲王志亮封陈晨巫绪涛卢志堂李松玉贾帅龙合肥工业大学土木与水利工程学院安徽合肥230009 合肥工业大学资源与环境工程学院安徽合肥230009

为了分析锦屏水电站大理岩的动力学响应和能量特性,采用分离式霍普金森压杆对岩样开展了动态压缩试验,并引入分形维数定量表征试样的破碎形态、能耗特性及其与应变率的内在关系。结果表明:动态载荷下大理岩应力-应变曲线初始压密段不明... 详细信息

为了分析锦屏水电站大理岩的动力学响应和能量特性,采用分离式霍普金森压杆对岩样开展了动态压缩试验,并引入分形维数定量表征试样的破碎形态、能耗特性及其与应变率的内在关系。结果表明:动态载荷下大理岩应力-应变曲线初始压密段不明显,当应变率较低时,应力-应变曲线呈现出回弹现象;试样峰值应力随应变率的增大而增加,且动态抗压强度与应变率对数呈线性关系;试样能量时程曲线呈“S”型演化,入射能、反射能及透射能均随应变率的增高而增大,动态抗压强度与能耗密度呈对数增长关系;随着比能量耗散值或应变率的增加,试样破坏程度和分形维数均逐渐增大。本文研究对提高爆破等动态荷载下岩石损伤破坏机理的认知具有一定参考价值。

关键词：大理岩动态冲击力学响应能量特性分形维数

维普期刊数据库博看期刊

光化学还原-硅钼蓝光度法测定Pd/Al2O3催化剂中的硅

在线全文

学校读者我要写书评

暂无评论

贵金属 2016年第4期37卷 9-14页

作者：宋建强金娅秋方卫郭帅龙冯璐任传婷戴云生唐春昆明贵金属研究所贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室昆明650106

研究了β型硅钼黄的形成及其被乙醇光化学还原为硅钼蓝的影响条件,建立了乙醇光化学还原-硅钼蓝分光光度法测定氧化铝载钯催化剂中硅含量的新方法.结果表明,在810nm波长处,硅量在0-2μg/mL范围内硅钼蓝吸光度符合朗伯-比耳定律;分取溶... 详细信息

研究了β型硅钼黄的形成及其被乙醇光化学还原为硅钼蓝的影响条件,建立了乙醇光化学还原-硅钼蓝分光光度法测定氧化铝载钯催化剂中硅含量的新方法.结果表明,在810nm波长处,硅量在0-2μg/mL范围内硅钼蓝吸光度符合朗伯-比耳定律;分取溶解后的催化剂溶液,控制测定试液钼酸铵浓度为5g/L、盐酸浓度为0.9mol/L,以乙醇作为光催化还原剂,用UVA紫外灯为光源照射25min,测定样品中含量为0.1%-1%的硅,RSD=1.43%（n=9）,加标回收率98.5%-101%.

关键词：分析化学硅光化学还原硅钼蓝光度法 Pd/Al2O3催化剂