报告人：黄庆教授,中国科学院宁波材料技术与工程研究所

报告题目：《Chemical scissor-mediated structural editing of layered transition metal carbides》

报告时间：2023年8月23日 14:30

报告地点：九里校区1号综合楼2019会议室

摘要：

Intercalated layered materials are usually produced by inserting guest species into the van der Waals (vdW) gaps of inherently layered materials such as graphite, hexagonal boron nitride (hBN), and transition metal dichalcogenides. The guest-host interaction alters the electronic structure and enables property tailoring for energy storage, catalysis, electronic, optical, and magnetic properties. Intercalation in non-van der Waals (non-vdW) nanolaminated materials and their two-dimensional (2D) derivatives is, however, rare and lacks understanding of the chemistry and structural tunability involved. Here, we show a structural editing protocol for non-vdW layered ternary carbides and nitrides (known as MAX phases) and their vdW multilayer derivatives (MXenes). Gap-opening and species-intercalating stages are separately mediated by chemical scissors and guest intercalants, respectively. A large family of 3D MAX phases with unconventional components and structures as well as 2D MXenes with versatile termination species, is accomplished. Moreover, a reverse transformation from 2D MXenes to 3D MAX phases is realized through knockout of surface termination species by metal scissors and stitching of ceramic slabs by zero-valence metal atoms. This scissor-mediated structural editing would enable structural and chemical tailoring in a broad class of layered ceramics.  

个人简介：

图片来源：百度百科

黄庆，湖南省溆浦人，研究员，博士生导师。1995-2002年求学于天津大学，获得无机非金属材料学士学位和材料学硕士学位。2002-2005年在上海硅酸盐所就读，获材料物理与化学博士学位。2005-2010年，分别在日本物质材料研究所和美国加州大学戴维斯分校开展博士后研究。2010年回国任职中科院宁波材料所。

研究集中于极端环境能源材料的开发与应用，主要包括三元层状陶瓷的新材料创制与极端环境下物性与结构的表征，高安全能源系统复合材料的设计与评估等。已在Science、Nature Materials、JACS等期刊杂志上发表论文230余篇，合作发表著作1部，被引6100余次，h指数42。获得“中国科学院优秀导师奖”、“朱李月华优秀教师奖”和美国陶瓷学会“Richard and Patricia Spriggs Phase Equilibria Award”等荣誉称号。