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Fabrication of mesh-like bismuth oxide single crystalline nanoflakes and their visible light photocatalytic activity

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Title: Fabrication of mesh-like bismuth oxide single crystalline nanoflakes and their visible light photocatalytic activity
Authors: Chen, Rui1, Shen, Zhu-Rui1, Wang, Hu1, Zhou, Hui-Jing1, Liu, Yu-Ping1, Ding, Da-Tong1, Chen, Tie-Hong chenth@nankai.edu.cn
Source: Journal of Alloys & Compounds. Feb2011, Vol. 509 Issue 5, p2588-2596. 9p.
Subjects: Microfabrication, Bismuth trioxide, Photocatalysis, Inorganic synthesis, Heat treatment of metals, Temperature effect, Chemical reactions, Absorption, Photodegradation, Lysine
Abstract: Abstract: Mesh-like bismuth oxide single crystalline nanoflakes were synthesized via a bismuth oxalate precursor way. During the synthesis procedure bismuth oxalate precipitate was hydrothermally treated, and variation of the pH value of synthesis solution as well as the addition of l-lysine could effectively tune the crystal phase and morphology of the bismuth oxalate precursor. Depending on the crystalline phase of the precursors and the calcination temperature, monoclinic α-Bi2O3 and tetragonal β-Bi2O3 were selectively obtained. Optical properties of the Bi2O3 materials were investigated by UV–vis absorption and the results proved that bismuth oxides were visible light responsive. Photodegradation of rhodamine B was used as a model reaction to test the photocatalytic activity of the Bi2O3 samples. The photocatalytic activity of bismuth oxides was related to its crystalline phase and morphology. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Abstract: Mesh-like bismuth oxide single crystalline nanoflakes were synthesized via a bismuth oxalate precursor way. During the synthesis procedure bismuth oxalate precipitate was hydrothermally treated, and variation of the pH value of synthesis solution as well as the addition of l-lysine could effectively tune the crystal phase and morphology of the bismuth oxalate precursor. Depending on the crystalline phase of the precursors and the calcination temperature, monoclinic α-Bi2O3 and tetragonal β-Bi2O3 were selectively obtained. Optical properties of the Bi2O3 materials were investigated by UV–vis absorption and the results proved that bismuth oxides were visible light responsive. Photodegradation of rhodamine B was used as a model reaction to test the photocatalytic activity of the Bi2O3 samples. The photocatalytic activity of bismuth oxides was related to its crystalline phase and morphology. [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2010.11.102