Surface etching induced ultrathin sandwich structure realizing enhanced photocatalytic activity

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（12）
• 页码范围: 1572-1580
• 页数: 9页
• 语种: 英文

摘要

Photocatalytic conversion efficiency is limited by serious charge carrier recombination.Efficient carrier separation is usually achieved by elegantly-designed multi-component structures connected by directional electric field.Herein,we developed a twodimensional (2D) sandwich structure,as a new photocatalytic system,to realize high-efficiency carrier separation.This strategy integrated multifunction into a single structure for the first time,which successfully introduces a stable built-in electric field,realizing high-effective carrier separation.Besides,the carrier concentration is dramatically increased due to dimensional confinement.Benefiting from above synergic advantages,2D sandwich photocatalyst achieves the highest nitrogen fixation rate (435 μmol g-1 h-1) in inorganic solid photocatalysts under visible light irradiation.We anticipate that 2D sandwich photocatalyst holds promises for the application and expansion of 2D materials in photocatalysis research.