Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores

• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2020,（11）
• 所属期刊栏目: Special Topic:Hierarchically Porous Materials
• 页码范围: 1638-1646
• 页数: 9页
• 语种: 英文
• DOI: 10.1093/nsr/nwaa059

摘要

In nature,sequential harvesting of light widely exists in the old life entity,i.e.cyanobacteria,to maximize the light absorption and enhance the photosynthesis efficiency.Inspired by nature,we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle,which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanopartide subunits.Structurally,HoMSs consist of different band-gap materials outside-in,thus realizing the efficient harvesting of light with different wavelengths.Moreover,introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption.With the benefit of sequential harvesting of light in HoMSs,the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles.Impressively,using these aforementioned materials as photocatalysts,highly efficient photocatalytic water splitting is realized,which cannot be achieved by using the nanoparticle counterparts.This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.