Facile fabrication of three-dimensional interconnected nanoporous N-TiO2 for efficient photoelectrochemical water splitting

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 955-960
• 页数: 6页
• 语种: 英文

摘要

Three-dimensional (3D) interconnected porous architectures are expected to perform well in photoelec-trochemical (PEC) water splitting due to their high specific surface area as well as favourable porous properties and interconnections.In this work,we demonstrated the facile fabrication of 3D interconnected nanoporous N-doped TiO2 (N-TiO2 network) by annealing the anodized 3D interconnected nanoporous TiO2 (TiO2 network) in ammonia atmosphere.The obtained N-TiO2 network exhibited broadened light absorption,and abundant,interconnected pores for improving charge separation,which was supported by the reduced charge transfer resistance.With these merits,a remarkably high photocurrent density at 1.23 V vs.reversible hydrogen electrode (RHE) was realized for the N-TiO2 network without any co-catalysts or sacrificial reagents,and the photostability can be assured after long term illumination.In view of its simplicity and efficiency,this structure promises for perspective PEC applications.