Adsorption and UV/Visible photocatalytic performance of BiOI for methyl orange, Rhodamine B and methylene blue: Ag and Ti-loading effects

Title
Adsorption and UV/Visible photocatalytic performance of BiOI for methyl orange, Rhodamine B and methylene blue: Ag and Ti-loading effects
Author(s)
손영구박요한나율이Pradhan[Pradhan]민봉기
Keywords
VISIBLE-LIGHT IRRADIATION; SOLVOTHERMAL SYNTHESIS; HETEROJUNCTION PHOTOCATALYSTS; BIOI/BIOCL COMPOSITES; TEMPERATURE SYNTHESIS; ORGANIC POLLUTANTS; HIERARCHICAL BIOI; HIGHLY EFFICIENT; DYE DEGRADATION; WATER-TREATMENT
Issue Date
201404
Publisher
ROYAL SOC CHEMISTRY
Citation
CRYSTENGCOMM, v.16, no.15, pp.3155 - 3167
Abstract
We synthesized echinoid-like BiOI microspheres with various doped concentrations of Ag (0.1, 1.0, 5.0, 10.0 mol%) and Ti (1.0, 5.0, 10.0, 30.0, 50.0 mol%) in ethylene glycol and then examined their fundamental properties by scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, UV-visible absorption, FT-IR, Raman, photoluminescence and Brunauer-Emmett-Teller (BET) surface area measurements. We also measured the adsorption and photocatalytic dye-degradation performance of the catalysts using methyl orange (MO), Rhodamine B (RhB) and methylene blue (MB). The adsorption performance was found to be in the order of MO < RhB < MB, and to depend somewhat upon the Ag and Ti-loadings. MO was degraded in the order of BiOI < Ag-BiOI < Ti-BiOI under UV and visible light irradiation, while the degradation of RhB was in the order of Ag-BiOI approximate to Ti-BiOI << BiOI, and Ag-BiOI < BiOI < Ti-BiOI, respectively. MB showed poor photodegradation under UV and visible light. Finally, we used an indirect chemical probe method with active species scavengers and photoluminescence spectroscopy to clarify the dye-sensitized photodegradation mechanism. In the mechanism, O-center dot(2)- and h(+) were active species under visible light irradiation. No (OH)-O-center dot radicals were found by luminescence spectroscopy.
URI
http://hdl.handle.net/YU.REPOSITORY/32625http://dx.doi.org/10.1039/c3ce42654h
ISSN
1466-8033
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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