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Electrochemical Synthesis of Nanocrystalline Bi 12 TiO 20 Powders and their Photocatalytic Ability under Visible Light
Author(s) -
Gao Chang,
Ma Junfeng,
Sun Yong,
Song Zuwei,
Fang Jingrui,
Liu Zhensen
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04505.x
Subject(s) - nanocrystalline material , materials science , photocatalysis , chemical engineering , photodegradation , electrochemistry , visible spectrum , anode , nanocrystal , electrolyte , high resolution transmission electron microscopy , crystallization , nanotechnology , electrode , optoelectronics , chemistry , catalysis , transmission electron microscopy , biochemistry , engineering
Nanocrystalline Bi 12 TiO 20 powders were successfully synthesized using an electrochemical method, where Bi and Ti plates were used as the anode and the cathode. Their crystallization and dispersion strongly rely on the H 3 PO 4 amount in the electrolytic solution. Only large‐sized Bi 12 TiO 20 microspheres can be obtained without H 3 PO 4 , while adding H 3 PO 4 in an electrolytic solution will destroy the dense microspheres and weaken the adhesion among primary particles, forming well‐dispersed nanocrystalline Bi 12 TiO 20 . XRD and HRTEM evidenced the coexistence of body‐centered cubic phase Bi 12 TiO 20 with the face‐centered cubic phase in nanocrystalline samples, and ultraviolet‐Vis absorption and photodegradation data verified their good response to visible light and excellent photocatalytic ability.