纳米棒
光催化
极性(国际关系)
带材弯曲
材料科学
分解水
半导体
纳米技术
光催化分解水
极地的
载流子
宽禁带半导体
氮化镓
化学物理
化学工程
光化学
光电子学
化学
物理
图层(电子)
催化作用
生物化学
工程类
细胞
天文
作者
Zheng Li,Liang Zhang,Yong Liu,Chenyi Shao,Yuying Gao,Fengtao Fan,Junxi Wang,Jinmin Li,Janchang Yan,Rengui Li,Can Li
标识
DOI:10.1002/ange.201912844
摘要
Abstract Photocatalytic overall water splitting has been recognized as a promising approach to convert solar energy into hydrogen. However, most of the photocatalysts suffer from low efficiencies mainly because of poor charge separation. Herein, taking a model semiconductor gallium nitride (GaN) as an example, we uncovered that photogenerated electrons and holes can be spatially separated to the nonpolar and polar surfaces of GaN nanorod arrays, which is presumably ascribed to the different surface band bending induced by the surface polarity. The photogenerated charge separation efficiency of GaN can be enhanced significantly from about 8 % to more than 80 % via co‐exposing polar and nonpolar surfaces. Furthermore, spatially assembling reduction and oxidation cocatalysts on the nonpolar and polar surfaces remarkably boosts photocatalytic overall water splitting, with the quantum efficiency increased from 0.9 % for the film photocatalyst to 6.9 % for the nanorod arrays photocatalyst.
科研通智能强力驱动
Strongly Powered by AbleSci AI