检索结果-南通市图书馆

Improved nitrogen reduction electroactivity by unique MoS_(2)‐SnS_(2) heterogeneous nanoplates supported on poly(zwitterionic liquids)functionalized polypyrrole/graphene oxide

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2022年第5期43卷 1341-1350页

作者： Hui Mao Haoran Yang Jinchi liu Shuai Zhang daliang liu Qiong Wu Wenping Sun Xi‐Ming Song Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced MaterialsCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthornVIC 3122Australia School of Materials Science and Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhou 310027ZhejiangChina

Unique MoS_(2)‐SnS_(2)heterogeneous nanoplates have successfully in‐situ grown on poly(3‐(1‐vinylimidazolium‐3‐yl)propane‐1‐sulfonate)functionalized polypyrrole/graphene oxide(PVIPS/PPy/GO).PVIPS can attract heptamolybdate ion(Mo7O246−)and Sn^(4+)as the precursors by the ion‐exchange,resulting in the simultaneous growth of 1T’‐MoS2 and the berndtite‐2T‐type hexagonal SnS_(2)by the interfacial induced effect of *** obtained MoS_(2)‐SnS_(2)/PVIPS/PPy/GO can serve as electrocatalysts,exhibiting good NRR performance by the synergistic *** semi‐conducting SnS_(2)would limit the surface electron accessibility for suppressing HER process of 1T’‐MoS_(2),while metallic 1T’‐MoS_(2)might efficiently improve the NRR electroactivity of SnS_(2)by the creation of Mo‐Sn‐Sn trimer catalytic ***,the irreversible crystal phase transition has taken place during the NRR *** 1T’‐MoS_(2)and SnS_(2)have electrochemically reacted with N_(2),and irreversibly converted into Mo^(2)N and SnxNz due to the formation of Mo−N and Sn−N bonding,meanwhile,partial SnS_(2) has been irreversibly evolved into SnS due to the reduction by the power source in the electrochemical *** would put forward a new design idea for optimizing the preparation method and electrocatalytic activity of transition metal dichalcogenides.

关键词： MoS_(2) SnS_(2) Poly(3‐(1‐vinylimidazolium‐3‐yl)propane‐1‐sulfonate)functionalized polypyrrole/graphene oxide Nitrogen reduction reaction Irreversible crystal phase transition

Binary trinuclear metal-oxo sub-nanomaterials for photocatalytic hydrogen and chlorine production from seawater

在线全文

学校读者我要写书评

暂无评论

SusMat 2022年第6期2卷 708-719页

作者： Yang Wang Litong Shi Haijun Hu Bingzhi Qian Wei Hou Hui Li Xue liu daliang liu Shuyao Wu Hongwei Huang Xi-Ming Song Yu Zhang Tianyi Ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials College of ChemistryInstitute of Clean Energy ChemistryLiaoning UniversityShenyangChina School of Materials Science and Engineering Jiujiang UniversityJiujiangChina Centre for Translational Atomaterials Swinburne University of TechnologyHawthornVictoriaAustralia School of Science RMIT UniversityMelbourneVICAustralia Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and TechnologyChina University of GeosciencesBeijingChina

Owing to the need for regenerant and self-reduction problem,the hydrogen performance of sub-nano-sized trinuclear iron-oxo complexes is still far from satisfied with affordability and ***,two binary photocatalytic systems based on trinuclear metal-oxo complexes have been first constructed and experimentally confirmed to be competent for seawater hydrogen evolution(715.4and271.9μmol of hydrogen can be found,respectively,after 48h).Notably,chloride ions act as the hole catcher and move into the gas phase in the stable form of *** to heterogeneous structures,homogeneous systemsnot only enhance the hydrogen performance while ensuring the stability of metal-oxo complexes,but also shorten the consumption of photogenerated carriers by dissolved impurities in the *** new attempt of building pluralistic sub-nanometric systems may offer novel design strategies with noble-metal-free catalysts and low-cost candidates for traditional semiconductor materials in enhancing photocatalytic efficiency and performing chlorine evolution from seawater splitting.

关键词： photocatalytic hydrogen evolution seawater splitting sub-nanometric material trinuclear metal-oxo complex

Designing ABC-6 family small pore zeolites by epitaxial growth approach

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

Chinese Chemical Letters 2024年第3期35卷 508-512页

作者： Xiaohui Cui Jia Lv Chao Ma Yujiao Wang Zhenghao Jia daliang Zhang Peng Guo Zhongmin liu Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450001China National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry EngineeringChongqing UniversityChongqing 400044China University of Chinese Academy of Sciences Beijing 100049China Division of Energy Research Resources Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Aluminosilicate small pore zeolites belonging to ABC-6 family play crucially important roles in the high methanol conversion with the high selectivity of light olefins,gas separation and storage,and selective catalytic reduction of NO_(x).In this work,we report a general method,called the epitaxial growth approach,for designing ABC-6 family small pore *** is mainly realized through the epitaxial growth on the nonporous SOD-type zeolite in the presence of inorganic cations(Na^(+)and K^(+))combined with a variety of organic structure directing agents(OSDAs).In this case,a series of ABC-6 family small pore zeolites such as ERI-,SWY-,LEV-,AFX-,and PTT-type zeolites have been successfully synthesized within a few *** importantly,the advanced focused ion beam(FIB)and the low-dose high-resolution transmission electron microscopy(HRTEM)imaging technique have been utilized for unraveling the zeolite heterojunction at the atomic level during the epitaxial growth *** turns out(222)crystallographic planes of the SOD-type zeolite substrate provide unique pre-building units,which facilitate the growth of targeted ABC-6 family small pore zeolites along its ***,the morphologies of ERI-type zeolite can also be tuned through the epitaxial growth approach,achieving a longer lifetime in the methanol conversion.

关键词： Zeolite structure Zeolite synthesis Structural characterizations Low-dose imaging Focused ion beam

铜合金表面激光原位制备陶瓷颗粒增强钴基合金梯度涂层

在线全文

学校读者我要写书评

暂无评论

中国激光 2009年第5期36卷 1218-1223页

作者：陈岁元董江刘大亮刘常升东北大学材料各向异性与织构教育部重点实验室辽宁沈阳110004

用Co基新合金粉为梯度涂层原材料,在结晶器用Cu-Cr合金表面利用激光诱导原位制备陶瓷相增强Co基合金梯度涂层。对实验制备样品涂层的组织结构与性能进行了研究。结果表明,激光制备Co基梯度涂层的工艺参数为:激光平均功率50W,频率15Hz,脉... 详细信息

用Co基新合金粉为梯度涂层原材料,在结晶器用Cu-Cr合金表面利用激光诱导原位制备陶瓷相增强Co基合金梯度涂层。对实验制备样品涂层的组织结构与性能进行了研究。结果表明,激光制备Co基梯度涂层的工艺参数为:激光平均功率50W,频率15Hz,脉宽3ms,扫描速度4.0 mm/s,搭接率20%～25%。实验制备出了3层具有不同成分和结构的梯度涂层,梯度涂层的主要组织是α-CoCr2(Ni,O)4合金相,而Fe-Ni,Cu-Ni以固溶相的形式存存其中,梯度涂层的各个分层中原位生成的碳化物陶瓷颗粒的数量、密度郜呈现由内层到外层逐渐增大的趋势。梯度涂层的平均显微硬度由铜合金基体的94HV呈梯度递增加到了最外层的432HV,摩擦实验表明梯度涂层的最少磨耗量为0.008g,表明激光原位制备的梯度涂层具有良好的耐磨性能。

关键词：激光技术脉冲激光 Co基合金梯度涂层原位制备陶瓷颗粒

铜合金表面激光原位制备钴基合金涂层的结构与机制

在线全文

学校读者我要写书评

暂无评论

中国激光 2009年第5期36卷 1302-1307页

作者：董江陈岁元刘大亮刘常升东北大学材料各向异性与织构教育部重点实验室辽宁沈阳110004

以钴为主体的涂层原材料粉术中添加Ni,Cr,Fe,C,Si,W,MgO,Y2O3和纳米Al粉等形成新型合金粉末体系,在结晶器用Cu-Cr合金表面利用脉冲激光原何制备颗粒增强Co基合金涂层。应用金相显微镜、扫描和透射电镜等分析技术,对实验制备样品涂层的... 详细信息

以钴为主体的涂层原材料粉术中添加Ni,Cr,Fe,C,Si,W,MgO,Y2O3和纳米Al粉等形成新型合金粉末体系,在结晶器用Cu-Cr合金表面利用脉冲激光原何制备颗粒增强Co基合金涂层。应用金相显微镜、扫描和透射电镜等分析技术,对实验制备样品涂层的组织结构进行研究。结果表明,在优化了粉末成分及激光扫描工艺参数(50W,15Hz,3ms,4.0mm/s)条件下,制备出了与Cu合金基体界面冶金结合的钴基合金涂层;在涂层内部以Co-Cr-W-C为主体元素形成了细晶、高硬度的合金组织,涂层中原位生成了细小的陶瓷颗粒相,起刮了复合强化作用,而W,Cr等强碳化物在基体中析出,起到了弥散强化的作用。涂层中过渡层富Co区的出现导致了富Cu区的产生。

关键词：激光技术脉冲激光 Co基合金原位生成陶瓷颗粒

SYNTHESIS AND CHARACTERIZATION OF DI(2,4,6-TRIBROMOPHENOXY)TRIPHENYL-ANTIMONY

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 1992年第2期2卷 32-35页

作者： Shu Wanyin liu daliang Huang Kelong Wang Kaiyi Li Yuangao Central South University of Technology Changsha 410083China

The synthetic method and characterization of di(2,4,6-tribromophenoxy)triphenyl antinony are reporledin this *** compound is prepared by reacting dihalotripheny-antimony with tribromophenol under defi-nite conditions and its yield is 70-80%.Relow 250℃,the product has good lhernal *** makes alavorable flame resisting effect on *** the addition is ouly l0 Phr without using animeny1rioxide,the oxygen index of the polymer increases from 18.51o 26.5,and there are no adverse effects on themechanical properties of polyelhylene.

关键词： antimony organoantimony compounds flame retardant

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

鲁中山区乡村景观个性特质评价研究

中国园林 2020年第2期36卷 85-90页

作者：吕桂菊刘大亮山东工艺美术学院济南250300 山东建筑大学艺术学院济南250101

乡村景观是景观科学研究的一个前沿领域,在中国快速的城市化进程中,乡村景观规划实践势在必行,乡村景观特质成为乡村健康持续发展的加速器。为此,以鲁中山区西营镇的5个自然乡村为调查研究对象,以乡村景观的分类为依据,运用德尔菲法结... 详细信息

乡村景观是景观科学研究的一个前沿领域,在中国快速的城市化进程中,乡村景观规划实践势在必行,乡村景观特质成为乡村健康持续发展的加速器。为此,以鲁中山区西营镇的5个自然乡村为调查研究对象,以乡村景观的分类为依据,运用德尔菲法结合专家意见和论证构建了由总目标层、要素指标层和功能指标层组成的乡村景观个性特质评价体系,并以此为依据分析探讨调研区域内5个乡村景观的个性特质,并总结提炼个性特质评价的规律,为乡村景观个性特质确定提供方法的借鉴。

关键词：风景园林乡村景观指标体系景观评价个性特质

锰前驱体对锂离子电池正极材料LiMn_2O_4性能的影响(英文)

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2014年第11期43卷 2584-2587页

作者：刘大亮杜立成刘亚飞陈彦彬北京矿冶研究总院北京100160 北京当升材料科技股份有限公司北京100160

通过固相烧结工艺,制备了铝掺杂的Li Mn2O4锂离子电池正极材料。其中球型化及鳞块状的Li Mn2O4分别由Al共沉积的锰氧化物(CMO)前驱体及电解二氧化锰(EMD)前驱体制备。通过X射线衍射仪、扫描电子显微镜、电感耦合等离子光谱仪及方型铝壳... 详细信息

通过固相烧结工艺,制备了铝掺杂的Li Mn2O4锂离子电池正极材料。其中球型化及鳞块状的Li Mn2O4分别由Al共沉积的锰氧化物(CMO)前驱体及电解二氧化锰(EMD)前驱体制备。通过X射线衍射仪、扫描电子显微镜、电感耦合等离子光谱仪及方型铝壳全电池充放电测试等手段对试样的物化指标进行了测试。结果表明两组试样都为纯相,同时以CMO为前驱体制备的Li Mn2O4材料具备较好的球型度,更高的振实密度以及更优异的电化学性能。

关键词： Li Mn2O4 化学共沉积锰前驱体正极材料

在线全文

学校读者我要写书评

暂无评论

基于曲率控制的球形移动机器人路径跟踪

高技术通讯 2008年第11期18卷 1161-1167页

作者：刘大亮孙汉旭贾庆轩北京邮电大学自动化学院北京100876

基于曲率的控制方法,对非完整约束条件下的欠驱动球形机器人进行了路径跟踪问题的研究。建立了非完整约束条件下具有正交的两输入球形机器人的运动学和动力学模型,并通过输入变换得到一个两输入的二阶系统。基于非线性滑模控制方法分别... 详细信息

基于曲率的控制方法,对非完整约束条件下的欠驱动球形机器人进行了路径跟踪问题的研究。建立了非完整约束条件下具有正交的两输入球形机器人的运动学和动力学模型,并通过输入变换得到一个两输入的二阶系统。基于非线性滑模控制方法分别设计了横向姿态控制器和纵向速度控制器。提出了一种曲率控制器,实现了球形机器人的路径跟踪。仿真和实验结果表明,系统的运动状态能够收敛到期望的邻域内,验证了控制方法的有效性。

关键词：球形机器人滑模控制曲率控制路径跟踪