Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 218, Issue -, Pages 80-90Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2017.06.041
Keywords
BiOIO3; Calcination method; Oxygen vacancy; Mercury
Funding
- NSF (Natural Science Foundation) [21237003, 50806041, 51106133, 51606115]
- Natural Science Foundation of Shanghai [16ZR1413500]
- Shanghai Science and Technology Development [15dz1200703, 15110501000]
- Science and Technology Support Program of Jiangsu Province [BE2014682]
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Bismuth-based nanomaterials exhibiting unique structures, which endow them with fascinating physicochemical properties, have received more and more interests as promising photocatalysts. Fabrication of BiOIO3 photocatalysts by calcination method was investigated for the first time. XRD patterns showed that the crystallinity of BiOIO3 photocatalysts could be controlled by calcination temperature. TGA demonstrated that calcining the precursor at a specific temperature range was appropriate for preparing BiOIO3 photocatalysts. XPS and FT-IR characterization revealed that the BiOIO3 photocatalysts prepared by calcination method possessed oxygen vacancies, which acted as the positive charge centers to trap the electron easily, inhibiting the recombination of photo electron-hole pairs. Furthermore, PL spectra confirmed the oxygen vacancies can favor for the separation of the electron-hole pairs and in turn enhance the photocatalytic performance. From the above analysis, the mechanism of preparing BiOIO3 photocatalysts by calcination method was proposed. Meanwhile, the effect of oxygen vacancies on the photocatalytic activity of BiOIO3 photocatalysts was investigated.The BiOIO3 photocatalysts with oxygen vacancies were found to be efficiently photocatalytically remove gaseous Hg and the relative photocatalysis mechanism was investigated. (C) 2017 Published by Elsevier B.V.
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