中科院沈阳金属所的刘岗研究员来访

2015-8-24 16:13:44

报告题目:面向太阳能燃料光催化材料的多尺度设计与构建

报告人:刘岗 研究员(优青、拔尖,中国科学院金属研究所)

报告时间828日(星期五)上午1030

报告地点:物理科技楼101

报告摘:

Solar driven water splitting or reduction of CO2 on photocatalysts represents one of the promising techniques to convert solar energy into chemical energy. The key in achieving the practical application of photocatalysis is to develop efficient photocatalysts. The efficiency of photocatalysis is determined by the synergistic effects of light absorption, charge separation and catalytic conversion, which are three basic processes of photocatalysis. Concerning these three basic processes, we focus on three strategies to tailor the properties of photocatalysts. They are band engineering together with exploring unknown photocatalysts, heterostructuring and facet controlling. Regarding light absorption process, ongoing studies include two parts: modifying known photocatalysts and exploring unknown ones. Two elemental semiconductors (sulfur and boron) as visible light photocatalysts have been discovered. To achieve the redshift of the whole light absorption range of wide-bandgap photocatalysts by doping, the strategy developed is to use a layered structure for homogeneous doping (i.e., homogeneous self-modification with nitrogen vacancies and homogeneous amorphization in graphitic carbon nitride). Regarding charge separation process, two kinds of heterostructures (TaB2-Ta2O5; CdS-ZnS) with a core-shell configuration have been recently developed to promote the spatial separation of charge carriers. Regarding catalytic conversion process, both surface structure of photocatalyst itself and loading co-catalysts can play a crucial role in controlling the surface charge transfer. With the assistance of a ferroelectric field in PbTiO3 nanoplates, noble metals and metal oxides can be selectively deposited on the positively and negatively charged {001} facets of the nanoplates. It is found that the spatial distribution of reducing and oxidizing co-catalysts on photocatalyst surface is an important issue to be considered.

报告人简介

刘岗,中国科学院金属研究所研究员。2003年本科毕业于吉林大学材料物理专业,2009年在中国科学院金属研究所获得材料学博士学位,博士毕业后,在沈阳材料科学国家(联合)实验室从事太阳能光催化材料研究,在Chem RevAdv MaterJ Am Chem SocAngew Chem Int EdAdv Energy MaterEnergy Environ Sci等期刊发表SCI论文80余篇,所发表论文被SCI引用7000余次(H因子40)。曾获中科院卢嘉锡青年人才奖、全国百篇优秀博士学位论文、太阳能光化学与光催化研究领域优秀青年奖、中国化学会青年化学奖等,入选国家万人计划首批青年拔尖人才支持计划,获国家自然科学基金委优秀青年基金资助。

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