NDLI: Synthesis, characterization, and visible-light photocatalytic activity of BiOI hierarchical flower-like microspheres

Content Provider	Royal Society of Chemistry (RSC)
Author	Song, Shue Li, Haiping Hou, Wanguo Du, Na Liu, Jingyi
Copyright Year	2014
Abstract	BiOI hierarchical flower-like microspheres were hydrothermally prepared, using tetrabutylammonium iodide as an iodine source and template. Many BiOI hierarchical structures have been synthesized using KI, NaI, HI or ionic liquids as the iodine source, but the use of alkyl ammonium iodide as the iodine source was not reported in the literature. The so-obtained BiOI samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen sorption measurements, and ultraviolet-visible diffuse reflectance spectroscopy. The effects of hydrothermal temperature and time on the BiOI crystal structure and morphology were investigated. The BiOI microspheres were composed of BiOI nanosheets. The photocatalytic performance of the BiOI samples was determined from the degradation of Rhodamine B, under visible light irradiation. BiOI microspheres prepared at 160 °C over 30 h exhibited excellent photodegradation efficiency, which was more than five and seven times higher than those of BiOI nanoplates and N-doped TiO2, respectively. The high photocatalytic performance was attributed to the high specific surface area and low nanosheet thickness. A morphologic factor was proposed to represent the ratio of specific surface area to nanosheet thickness, and correlated to the photodegradation efficiency of the BiOI samples. The photocatalytic efficiency increased with increasing morphologic factor. The BiOI photocatalyst exhibited excellent stability and reusability, and has potential in environment remediation.
Starting Page	31393
Ending Page	31399
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	59
Journal	RSC Advances
DOI	10.1039/c4ra04829f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Photodegradation Nanosheet Tetra-n-butylammonium bromide Photocatalysis Specific surface area Nitrogen Scanning electron microscope X-ray crystallography Sorption Iodide Transmission electron microscopy Ammonium iodide Hydrothermal circulation Alkane Rhodamine B Iodine
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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