Premium
One‐Pot Hydrothermal Synthesis and Photocatalytic Hydrogen Evolution of Pyrochlore Type K 2 Nb 2 O 6
Author(s) -
Wu Jingjing,
Zhou Chao,
Zhao Yufei,
Shang Lu,
Bian Tong,
Shao Lei,
Shi Feng,
Wu LiZhu,
Tung ChenHo,
Zhang Tierui
Publication year - 2014
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201300817
Subject(s) - photocatalysis , pyrochlore , chemistry , hydrothermal circulation , hydrothermal synthesis , hydrogen production , nanoparticle , water splitting , scanning electron microscope , nuclear chemistry , aqueous solution , methanol , crystallography , chemical engineering , hydrogen , catalysis , nanotechnology , materials science , organic chemistry , composite material , engineering , phase (matter)
A novel K 2 Nb 2 O 6 photocatalyst with pyrochlore structure has been synthesized via a facile one‐pot hydrothermal route with no aid of additives. The as‐prepared samples were characterized by powder X‐ray diffraction, ultraviolet‐visible spectroscopy and field emission scanning electron microscopy. The photocatalytic H 2 evolution was performed in an aqueous methanol solution under UV light irradiation. The as‐prepared K 2 Nb 2 O 6 photocatalyst with pyrochlore structure showed higher H 2 production activity than that of perovskite KNbO 3 and commercial Nb 2 O 5 powders in the absence of cocatalysts, due mainly to its unique crystal and energy band structures. The rate of H 2 evolution can be significantly enhanced by loading of Pt nanoparticles. The highest H 2 evolution rate of 121 µmol/h was reached when 0.7 wt% Pt nanoparticles were used, which was about 20 times higher than that of pristine K 2 Nb 2 O 6 .
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom