氧化钨类石墨烯结构的可控制备及其相关光电化学过程研究

Two-dimensional atomic crystals are entirely new class of materials, having abundant and novel physicochemical properties. Graphene is a representative of two-dimensional atomic crystal. In the past two years, beyond graphene itself, inorganic graphene analogues with high percentage of surface atoms have recently sparked worldwide interests owing to their novel properties and great potential for applications. However, their species are still only limited to several compounds. Tungsten oxide has many potential applications in broad areas of electrochromic windows, photochromic devices, nonemissive displays, gas sensors, and photocatalysts. In this project, we will focus on the fabrication of new tungsten oxide graphene-like two-dimensional materials, and investigation of their photoelectrochemical properties. We will explore an effective way for controllable preparation of tungsten oxide graphene-like two-dimensional materials, and investigate the relationship of surface/interface effect, quantum effect, energy band structure and photoelectrochemical behavior. This study is valuable for promoting deep development of Chinese tungsten resources, also provides a new route to the design and application exploration of two-dimensional atomic crystals.

以石墨烯为代表的二维原子晶体是一类全新的材料，结构独特，蕴含了丰富和新奇的物理化学性质。近两年来，"超越石墨烯"迅速成为科学界的热门话题，不同于先前研究的石墨烯材料，其他材料的类石墨烯结构具有一些更为复杂和有趣的特殊功能和性质，可能带来一系列革新的性能和广泛的应用，但总体来说二维原子晶体研究目前仍处于起步阶段，探索和研究的材料体系种类仍十分有限。氧化钨具有优异的光电致变色、光电催化及气敏性能，在智能显示、化学传感等领域具有重要应用。本项目围绕氧化钨类石墨烯结构的制备科学和光电化学特性，深入研究氧化钨类石墨烯结构的可控制备方法与生长机制，深入理解氧化钨类石墨烯结构的表界面效应、小尺寸效应和能带结构与光电化学性能之间的关系，探索氧化钨类石墨烯结构在光电化学方面的新奇物性和新效应。该项研究对于二维原子晶体材料的设计及应用探索提供了一种新的思路和途径，对于推动我国钨矿资源的深度加工也具有积极意义。

以石墨烯为代表的二维原子晶体是一类全新的材料，结构独特，蕴含了丰富和新奇的物理化学性质。本项目围绕氧化钨类石墨烯结构的制备和光电化学特性，深入研究了氧化钨类石墨烯结构的制备方法与生长机制，建立和发展了一些氧化钨类石墨烯结构的合成新思路与制备新途径，研究了氧化钨类石墨烯结构的结构参数与物理化学基本性质之间的相关性，如光学性能、表面增强拉曼性能，探索了氧化钨类石墨烯结构在多相光催化、电致变色领域的新奇物性和新效应。该项研究对于二维原子晶体材料的设计及应用探索提供了一种新的思路和途径，对于推动我国钨矿资源的深度加工也具有积极意义。