Details

Autor(en) / Beteiligte

• Hua, Erbing
• Liu, Gang
• Zhang, Guan
• Xu, Xiaoxiang

Titel

fabrication of two-dimensional g-CN/BaTaO nanosheet heterostructures with efficient charge separations and photocatalytic hydrogen evolution under visible light illumination

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2018-03, Vol.47 (12), p.436-4367

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Separation of photo-generated electron-hole pairs plays a crucial role in determining the practical performance of semiconductor photocatalysts. Here we have successfully fabricated two dimensional g-C 3 N 4 /Ba 5 Ta 4 O 15 nanosheet heterostructures through an in situ urea degradation method. The so-formed nanosheet heterostructures demonstrate superior photocatalytic activities in H 2 evolution reactions over individual component. Further analysis using photoelectrochemical measurements suggests efficient charge separations at the interfaces of these heterostructures which contribute to a prolonged lifetime of photo-generated charges as well as the much enhanced photocatalytic activities. The in situ fabrication method adopted in this work ensures a firm anchorage of g-C 3 N 4 onto Ba 5 Ta 4 O 15 nanosheets and a face-to-face contact between these two semiconductors. Such a peculiar microstructure is critical to the high photocatalytic activity and apparently outweighs the conventional ones that involve only physical mixtures of two semiconductors and a point-to-point contact. Two dimensional g-C 3 N 4 /Ba 5 Ta 4 O 15 nanosheet heterostructures ensure firm anchorage of g-C 3 N 4 onto Ba 5 Ta 4 O 15 nanosheets as well as a face-to-face contact.