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材料化学研究中高分辨固体核磁共振技术的应用
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作者 姜鹤 《化工设计通讯》 CAS 2020年第3期82-82,99,共2页
近些年,随着科学技术的不断发展与进步,高分辨固体核磁共振技术应运而生,在化学材料研究领域中具有的应用价值非常显著。通过与具体实验过程和实际案例相结合,对高分辨固体核磁共振技术的应用效果进行全面的分析和探究。首先是使用一维... 近些年,随着科学技术的不断发展与进步,高分辨固体核磁共振技术应运而生,在化学材料研究领域中具有的应用价值非常显著。通过与具体实验过程和实际案例相结合,对高分辨固体核磁共振技术的应用效果进行全面的分析和探究。首先是使用一维谱实验、二维化学位移相关谱实验对分子化学结构、聚集态结构进行仔细的研究,之后再利用统一产品的体系结构和组分的定量表征进行研究;最后,采用有效的方法对固体材料分子动力学行为进行全面的研究。 展开更多
关键词 材料化学研究 高分辨固体核磁 共振技术
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新型能力框架下高等分析化学研究生课程的构建 被引量:3
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作者 干宁 栾倩 《大学化学》 CAS 2017年第5期-,共6页
课程是实现教育目标的主要载体。本研究根据材料化学类研究生的需要,以"高等分析化学"课程为研究对象,采用"教学研、立体化"的课程教学理念,构建了"探究式"教学方法。在课堂教学中采用以问题导入为驱动... 课程是实现教育目标的主要载体。本研究根据材料化学类研究生的需要,以"高等分析化学"课程为研究对象,采用"教学研、立体化"的课程教学理念,构建了"探究式"教学方法。在课堂教学中采用以问题导入为驱动、科研探究和知识传授为基础、第一课堂和第二课堂相结合的能力框架体系。通过几年的实践,该体系日臻完善,效果良好,充分实现了教与学的完美统一,为材料化学类研究生的科研能力培养打下良好基础,有利于将当代研究生培养成为既掌握理论知识又具有实践能力的综合型人才。 展开更多
关键词 材料化学研究 高等分析化学 能力框架 综合型人才
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高校自然科学学报特色栏目建设与实践 被引量:5
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作者 叶冰 《长江大学学报(社会科学版)》 2014年第8期28-30,共3页
针对期刊办刊体制改革的大背景,提出了自科学报发展的重要举措——打造特色栏目。对自科学报特色栏目开设的意义,如自科学报报道内容是学科发展和科研实力的综合反映、自科学报栏目设置必须顺应服务学术和科技进步的要求、自科学报栏目... 针对期刊办刊体制改革的大背景,提出了自科学报发展的重要举措——打造特色栏目。对自科学报特色栏目开设的意义,如自科学报报道内容是学科发展和科研实力的综合反映、自科学报栏目设置必须顺应服务学术和科技进步的要求、自科学报栏目建设是锻炼队伍和形成特色的重要举措等进行了论述。提出了自科学报打造特色栏目的基本做法,即围绕学科前沿和特定优势资源展开工作、围绕科研项目和人才培养明确定位、围绕可持续发展确定栏目建设方向等进行了阐述。介绍了"光电化学材料与器件研究"特色栏目开办的具体做法,并进行了深入思考。 展开更多
关键词 高校自科学报 特色栏目建设 光电化学材料与器件研究 编辑能力建设
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Electrochemical study on semiconductive properties of the passive film on rebar in concrete 被引量:4
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作者 ZHANG Yun-lian LI Qi-ling 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第8期1447-1452,共6页
The electrochemical behavior of metallic passive film on rebar in concrete is characterized by its semiconductive nature. The charge distribution at the interface between a semiconductor and an electrolyte is often de... The electrochemical behavior of metallic passive film on rebar in concrete is characterized by its semiconductive nature. The charge distribution at the interface between a semiconductor and an electrolyte is often determined by measuring the capacitance of the space-charge layer (Csc) as a function of the electrode potential (E). When the space charge-layer serves as the depletion layer, the relation of Csc^-2 vs E resembles a Mott-Schottky plot (M-S plot). The semiconductive properties of the passive film on rebar in concrete were analyzed with M-S plots to study the effect of chloride ions and mineral admixtures on rebar passive films. Some rebar electrodes were immersed in simulated concrete pore solutions, while others were embedded in concrete with/without mineral admixtures. In saturated Ca(OH), solutions, the relation of Csc^-2-E of rebar electrodes shows linear MottSchottky relationship indicating that the passive film on rebar is a highly disordered n-type semiconductor, with donor density (ND) in the order of 10^26m^-3. After adding chloride ions (Cl wt%〈0.2%) in system solutions, the M-S plot slopes significantly decreased and ND increased, suggesting that chloride ion will cause passive film corrosion and breakdown. The M-S plots of the passive film on rebar electrodes embedded in concrete were similar to those immersed in simulated system solution. However, ND of those in concrete with mineral admixtures tended to be a little smaller, indicating that introducing proper quantity admixtures into concrete could make the rebar passive film have a thicker space-charge layer and therefore a thicker passive film layer. 展开更多
关键词 Mott-Schottky (M-S) Plot Rebar electrode. Passive film Simulated concrete pore solution Mineral admixture
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标准信息
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《中国建筑防水》 2007年第8期36-37,共2页
关键词 柔性防水卷材 彩砂 防水垫层 自粘 泛水 防水材料 彩色瓷粒 建材工业 建筑工业 建筑材料工业 建材行业标准 中国化学建筑材料公司苏州防水材料研究设计所 沥青瓦 起草小组
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Magnetic nanowires fabricated by anodic aluminum oxide template—a brief review 被引量:3
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作者 LI WuXia ZHANG Jun +2 位作者 SHEN TieHan JONES Grenville A GRUNDY Philip J 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第7期1181-1189,共9页
Anodic aluminum oxide (AAO) with highly ordered nanoscale pores which are monodisperse and mutually parallel can be produced through a self-organized electrochemical process. Subsequent deposition of materials into ... Anodic aluminum oxide (AAO) with highly ordered nanoscale pores which are monodisperse and mutually parallel can be produced through a self-organized electrochemical process. Subsequent deposition of materials into the nanopores produces AA0 embedded nanowire arrays. Whilst the templates can be further removed to obtain free individual nanowires, the em- bedded nanowires form an interesting nanocomposite structure. Recent research activities on the fabrication and characteriza- tion of AAO template based magnetic nanowires are reviewed in this article. Studies of specific systems are given as an exam- ple of the research in the area. 展开更多
关键词 anodic aluminum oxides electrochemical deposition magnetic nanowires templates magneto-optical properties
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Independent thickness and lateral size sorting of two-dimensional materials 被引量:1
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作者 Minsu Liu Chuang Yang +2 位作者 Ling Qiu Hui-Ming Cheng Bilu Liu 《Science China Materials》 SCIE EI CAS CSCD 2021年第11期2739-2746,共8页
Two-dimensional(2D)materials possess unique thickness-and lateral-size-dependent properties.Many efforts have been devoted to obtaining 2D materials with narrow structure heterogeneity while it is still challenging to... Two-dimensional(2D)materials possess unique thickness-and lateral-size-dependent properties.Many efforts have been devoted to obtaining 2D materials with narrow structure heterogeneity while it is still challenging to independently control their thickness and lateral size,limiting their widespread applications.Here,we develop a three-step method which achieves independent thickness and lateral size sorting of 2D materials.Taking 2D h-BN flakes as an example,their thickness and lateral size are independently sorted to different fractions with thicknesses smaller than 6 nm.In addition,the 2D h-BN flakes possess narrow distributions of both thickness and lateral size.We further develop a force field extraction method and achieve scalable size sorting of 2D h-BN,which is universal for sorting other 2D materials including MoS2 and graphene oxide.This work reports an effective method to produce structure homogenous 2D materials and will help fundamental studies and applications of 2D materials where thickness and lateral size are of concern. 展开更多
关键词 two-dimensional materials SORTING H-BN MoS2 graphene oxide thickness lateral size
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