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华东理工大学杨化桂教授报告通知
发表日期：2013-05-28
报告题目：氧化物晶体的结构调控及性能研究
报告人：杨化桂教授，华东理工大学材料学院
时间：2013年5月31日14:00-15:30
地点：曹光彪大楼326会议室
邀请人：王勇
个人简介：
1996年本科毕业于青岛大学高分子材料与工程专业，1999年获华东理工大学化学工程专业硕士学位，2005年获新加坡国立大学化学与分子生物工程专业博士学位。2005年至2007年作为高级研发科学家任职于美国通用电气（GE）高新材料集团，2007年至2008年在澳大利亚昆士兰大学功能纳米材料中心从事博士后研究。2008年12月被聘任为华东理工大学特聘教授，2011年1月被授予澳大利亚昆士兰大学荣誉教授（Honorary Professor）。入选上海市浦江人才，教育部新世纪优秀人才，上海市曙光学者，上海市东方学者特聘教授及首届上海“千人计划”特聘专家。迄今已在Nature，Angew. Chem. Int. Ed.， J. Am. Chem. Soc.， Adv. Funct. Mater.，Chem. Commun.和Chem. Mater.等国际SCI收录期刊发表学术论文40余篇，单篇最高被SCI他引800多次。曾多次被邀请在国际学术会议、著名研究机构就晶态材料的设计、制备及其在新能源领域的应用等相关主题进行大会报告，获得国际同行的广泛认可。
主要研究方向为：
1）金属与半导体氧化物晶态材料的可控制备与生长机理研究；
2）新型清洁能源与环境领域（太阳能电池、太阳能光催化水分解制氢、太阳能光还原CO2和非均相（光）催化等）关键功能材料的理论设计、合成和应用基础研究。
报告摘要：
Inorganic single crystals with special surface structures have many promising applications. Unfortunately, surfaces with high reactivity usually diminish rapidly during the crystal growth process as a result of the minimization of surface energy. Therefore, increasing the percentage of the desirable highly reactive surfaces or creating new favorable surface still remains a challenge. In 2008, we successfully synthesized anatase TiO2 single crystals with a large percentage of reactive {001} facets by using hydrofluoric acid (HF) as a capping agent. In this work, we investigated the adsorption effect of 12 non-metallic atoms X (where X can represent H, B, C, N, O, F, Si, P, S, Cl, Br or I) based on first-principle calculations. Furthermore, ultra-thin anatase TiO2 nanosheets with dominant {001} facets (~82%) and controllable thickness (1.6-2.7 nm) were synthesized by using a modified one-pot hydrothermal route. The TiO2 nanosheets exhibited a H2 evolution rate as high as 7381 mmol h-1 g-1 under UV-vis light irradiation, attributing to their exposed reactive {001} facets and high crystallinity. Interestingly, using a gas-phase oxidation process and titanium (IV) chloride (TiCl4) as a precursor, for the first time, we successfully prepared anatase TiO2 single crystals dominated with high-index {105} facets. Our research suggested that the {105} facets have the capability to cleavage water through photocatalytic process and this activity is higher than that of {101} facets while lower than {001} facets. Recently, we successfully fabricated three-dimensional CeO2 foam with atomic-level thickness for the first time, and systematically studied its novel properties.
