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Journals / Atmospheric Pollution Research / 2019 / Cilt: 10 - Sayı: 2

Effect of preparation method on the structure and photocatalytic performance of BiOI and $Bi_5O_7I$ for Hg0 removal

Bingjie DAI
Anchao ZHANG
Dan ZHANG
Zhichao LİU
Haixia LİU
Ruirui WANG
Xinmin ZHANG
Pages
355–362
DOI
—
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The results showed that $Bi_5O_7I$-HAc and BiOI-EG exhibited superior $Hg^0$ removal performances in comparison with BiOI-HAc and $Bi_5O_7I$I-EG, and $Bi_5O_7I$-HAc photocatalyst possessed much better activity on $SO_2$ resistance and wider reaction temperature scope than BiOI-EG.

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Objective & Hypothesis:This paper presents a study on the effect of preparation method on the structure and photocatalytic activities of BiOI and $Bi_5O_7I$ photocatalysts for elemental mercury ($Hg^0$ ) removal in a wet bubbling reactor.
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Key Findings & Data:Two visible-lightdriven BiOI photocatalysts (BiOI-HAc and BiOI-EG) via either glacial acetic acid (HAc) coprecipitation or ethylene glycol (EG) hydrothermal synthesis as well as their derivative samples ($Bi_5O_7I$-HAc and $Bi_5O_7I$-EG) were synthesized, respectively.
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Conclusion & Impact:The results showed that $Bi_5O_7I$-HAc and BiOI-EG exhibited superior $Hg^0$ removal performances in comparison with BiOI-HAc and $Bi_5O_7I$I-EG, and $Bi_5O_7I$-HAc photocatalyst possessed much better activity on $SO_2$ resistance and wider reaction temperature scope than BiOI-EG.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Özet

This paper presents a study on the effect of preparation method on the structure and photocatalytic activities of BiOI and $Bi_5O_7I$ photocatalysts for elemental mercury ($Hg^0$ ) removal in a wet bubbling reactor. Two visible-lightdriven BiOI photocatalysts (BiOI-HAc and BiOI-EG) via either glacial acetic acid (HAc) coprecipitation or ethylene glycol (EG) hydrothermal synthesis as well as their derivative samples ($Bi_5O_7I$-HAc and $Bi_5O_7I$-EG) were synthesized, respectively. The photocatalysts were characterized by $N_2$ adsorption-desorption analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS), photoelectrochemical measurement and electron spin resonance (ESR) techniques. The results showed that $Bi_5O_7I$-HAc and BiOI-EG exhibited superior $Hg^0$ removal performances in comparison with BiOI-HAc and $Bi_5O_7I$I-EG, and $Bi_5O_7I$-HAc photocatalyst possessed much better activity on $SO_2$ resistance and wider reaction temperature scope than BiOI-EG. The enhancement in $Hg^0$ removal efficiency can be attributed to the appearance of plenty of adsorbed oxygen, efficient photoinduced carrier separations and their special band gap structures. The photoexcited % $O_2$ − and h+ played key roles in the process of Hg0 removal.

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Cite This Article

DAI, B., ZHANG, A., ZHANG, D., LİU, Z., LİU, H., WANG, R., ZHANG, X. (2019). Effect of preparation method on the structure and photocatalytic performance of BiOI and $Bi_5O_7I$ for Hg0 removal. Atmospheric Pollution Research, Cilt: 10 - Sayı: 2, 355–362. https://ajindex.com/articles/199193

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