表面等离激元光催化固氮研究进展-中国材料进展

文章信息/Info

Author(s):: JIANG Ruibin; WANG Yuyang; MA Lixia; (Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, China)

Keywords:: photocatalysis; nitrogen fixation; surface plasmon; hot electrons; semiconductor

摘要:: 氮是生物体必需的元素，然而氮气由于其强的化学三键，无法直接被生物体利用，必须先转化为氨或氮氧化物才能被生物体利用。目前人工固氮主要依赖于HaberBosch氨合成方法，该方法在高温、高压条件下进行，造成了巨大的能源消耗和环境污染。光催化固氮被认为是一种极具前景的绿色人工固氮技术，但是传统的半导体光催化剂的光响应受其带隙的限制，很难实现对光的宽谱响应。局域表面等离激元（localized surface plasmon, LSP）共振波长可以通过纳米颗粒尺寸和长径比来调控，实现对太阳光的宽谱响应和强吸收，因此LSP光催化固氮受到了人们的关注。首先介绍了光催化固氮的基本原理，随后深入阐述了LSP的性质和其光催化机制，紧接着概括了近年来LSP光催化固氮的研究进展，最后对LSP光催化固氮研究中存在的问题及未来的发展趋势进行分析和展望。

Abstract:: Nitrogen is a necessary element for biosome. However, the molecular nitrogen can’t be directly used because of the extremely strong triple bond. It must be converted into ammonia or nitrogen oxide at first for biological assimilation. To date, the artificial nitrogen fixation is dependent on the Haber-Bosch method, which is carried out at high temperature and high pressure. It consumes substantial energy and releases enormous greenhouse gases. In the context of the global energy crisis and increasing greenhouse effect, it is urgent to explore green nitrogen-fixation strategies. Photocatalytic nitrogen fixation is one of the most promising green nitrogen fixation methods. In comparison with traditional semiconductor photocatalysts whose light absorption is limited by the band gap, the light absorption of localized surface plasmon (LSP) nanostructures can be tuned by varying the size and aspect ratio, and thereby LSP can realize broadband response and strong absorption to solar light. Hence, plasmonically photocatalytic nitrogen fixation attracts extensive attention recently. This review gives an overview of fundamentals, recent progress, and future perspective of plasmonically photocatalytic nitrogen fixation.