1. Round‐the‐Clock Photocatalytic Hydrogen Production with High Efficiency by a Long‐Afterglow Material
- Author
-
Qiaoyan Shang, Yan Liu, Xifeng Shi, Guanwei Cui, Ping Chen, Yujia Zhang, Fan Yaqi, Bo Tang, Hongyu Cui, and Yang Xiuli
- Subjects
Materials science ,business.industry ,Energy conversion efficiency ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Catalysis ,0104 chemical sciences ,Afterglow ,chemistry.chemical_compound ,chemistry ,Light energy ,Lattice defects ,Photocatalysis ,Optoelectronics ,Methanol ,0210 nano-technology ,business ,Hydrogen production - Abstract
Long afterglow materials can store and release light energy after illumination. A brick-like, micrometer-sized Sr2 MgSi2 O7 :Eu2+ ,Dy3+ long-afterglow material is used for hydrogen production by the photocatalytic reforming of methanol under round-the-clock conditions for the first time, achieving a solar-to-hydrogen (STH) conversion efficiency of 5.18 %. This material is one of the most efficient photocatalysts and provides the possibility of practical use on a large scale. Its remarkable photocatalytic activity is attributed to its unique carrier migration path and large number of lattice defects. These findings expand the application scope of long afterglow materials and provide a new strategy to design efficient photocatalysts by constructing trap levels that can prolong carrier lifetimes.
- Published
- 2019
- Full Text
- View/download PDF