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Surfactant‐Free Synthesis of Hyperbranched Monoclinic Bismuth Vanadate and its Applications in Photocatalysis, Gas Sensing, and Lithium‐Ion Batteries
Author(s) -
Zhao Yu,
Xie Yi,
Zhu Xi,
Yan Si,
Wang Sunxi
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200701053
Subject(s) - bismuth vanadate , monoclinic crystal system , photodegradation , photocatalysis , materials science , lithium (medication) , pulmonary surfactant , aqueous solution , bismuth , electrochemistry , ion , chemical engineering , inorganic chemistry , nanotechnology , crystal structure , chemistry , catalysis , electrode , crystallography , organic chemistry , medicine , engineering , metallurgy , endocrinology
Hyperbranched monoclinic BiVO 4 (h‐BiVO 4 ) has been synthesized on a large scale and with good uniformity by a surfactant‐free hydrothermal route. h‐BiVO 4 consists of four trunks with branches distributed on opposite sides. From observation of the intermediates at an early stage of the reaction process, it can be seen that during formation h‐BiVO 4 has different growth rates along the a , b , and c axes. Based on crystal structure analysis and experimental results, h‐BiVO 4 shows preferential growth along the [100] direction, and subsequently, along the [010] and [001] directions. As‐synthesized h‐BiVO 4 exhibits excellent photocatalytic ability in the photodegradation reaction of an aqueous solution of RB under visible light. Electrochemical measurements predict that h‐BiVO 4 possesses high sensitivity to formaldehyde and ethanol gases, favorable discharge capacity, and capacity retention, which indicate potential applications in the fields of sensing devices and lithium‐ion batteries.