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Rapid Preparation of Perovskite Lead Niobate Nanosheets by Ultrasonic‐Assisted Exfoliation for Enhanced Visible‐Light‐Driven Photocatalytic Hydrogen Production
Author(s) -
Hu Yuchao,
Guo Liejin
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402924
Subject(s) - photocatalysis , exfoliation joint , materials science , hydrogen production , perovskite (structure) , tetragonal crystal system , hydrogen , chemical engineering , visible spectrum , nanotechnology , crystal structure , catalysis , optoelectronics , crystallography , chemistry , organic chemistry , graphene , engineering
Ultrathin perovskite lead niobate nanosheets, (TBA/H)Pb 2 Nb 3 O 10 , were rapidly prepared by novel high‐power ultrasonic exfoliation of layered HPb 2 Nb 3 O 10 , and were used as a photocatalyst for hydrogen production from methanol solution under visible light irradiation ( λ >415 nm) for the first time. When compared with bulk HPb 2 Nb 3 O 10 , the nanosheets showed same tetragonal crystal structure, but dramatic decrease in thickness and two times higher photocatalytic hydrogen evolution activity. Enhanced photocatalytic performance resulted from the fact that the photoexcited electrons were more efficiently separated and utilized for H 2 production on the nanosheets, owing to shorter migration distance of photoexcited electrons.