Visible Light Photocatalysis of BiOI and Its Photocatalytic Activity Enhancement by in Situ Ionic Liquid Modification

Wang, Yunan; Deng, Kejian; Zhang, Lizhi

doi:10.1021/jp2042069

Cited by 276 publications

(187 citation statements)

References 44 publications

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“…For photocatalysis applications, photogenerated carriers with a smaller effective mass have higher mobility or a longer diffusion length, so they can reach surface reaction sites within their lifetime. The excellent photocatalytic performance of BiOI is exhibited in Methylene blue (MB) or other organic pollutant degradation under visible-light irradiation [14,27,28,30,44,45]. In these reaction processes, the dominant reactive species are photogenerated holes on the top of the VB.…”

Section: Electronic Structurementioning

confidence: 99%

Electronic Structure and Optical Properties of BiOI as a Photocatalyst Driven by Visible Light

Dai

Zhao

2016

Catalysts

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Bismuth oxyiodide (BiOI) is an important photoelectric functional material that has a wide range of applications. In particular, it can be used as a photocatalyst that shows photocatalytic activity under visible-light irradiation. The synthesis procedure and related photocatalytic performance of BiOI have been reported. However, some of its fundamental properties still need to be further investigated. In this article, density functional theory calculations were performed to investigate the crystal structure, electronic properties, and optical properties of BiOI. Furthermore, the relationship between the intrinsic properties and the photocatalytic performance of BiOI was investigated. Based on the calculated results of the band structure, density of states, and projected wave function, the molecular-orbital bonding structure of BiOI is proposed. As a semiconductor photocatalyst, BiOI shows slight optical anisotropy in the visible-light region, indicating that it can efficiently absorb visible light if the morphology of BiOI is controlled. After comparing several computational methods, it was found that the generalized-gradient approximation corrected for on-site Coulomb interactions (GGA + U) is a suitable computational method for large sized BiOI models (e.g., impurity doping, the surface, and the interface) because it can significantly reduce the computational time while maintaining calculation accuracy. Thus, this article not only provides an in-depth understanding of the fundamental properties of BiOI as a potential efficient photocatalyst driven by visible light, but it also suggests a suitable computational method to investigate these properties.

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Section: Electronic Structurementioning

confidence: 99%

Electronic Structure and Optical Properties of BiOI as a Photocatalyst Driven by Visible Light

Dai

Zhao

2016

Catalysts

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“…4, the newly observed characteristic features at 590, 1040 cm -1 were obtained as evidence proved that Bi 2 O 3 particles covered the actived carbon fiber with the physical interaction, after the hydrothermal reaction. The disappearance of oxygen-containing groups of activated carbon fiber as well as the presence of new peaks corresponding to chemical bonds between Bi 2 O 3 and activated carbon fiber [29,30]. The FT-IR spectrum and other results proved that the as-synthesized Bi 2 O 3 -activated carbon fiber was successfully synthesized.…”

Section: Resultsmentioning

confidence: 78%

Immobilization of Bi2O3 Particles on Activated Carbon Fiber and Its Photodegradation Performance for Pollutant Dyes

Nguyen¹,

Oh²,

Oh³

2018

Asian J. Chem.

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A combination of activated carbon fiber and bismuth oxide (Bi2O3) was prepared using a facile, one-step hydrothermal method. The resulting photocatalysts were characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, FT-IR spectra and BET method. UV-spectrophotometry was employed to measure the decrease in the concentration of rhodamine B, methylene blue trihydrate and reactive black B dyes in an aqueous solution after degradation with the photocatalysts under irradiation with visible light. The results contributes a new material to photocatalytic activity.

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“…Besides, Bi 6s and O 2p orbitals can form a new valence band in a row above the original position through orbital hybridization, thereby effectively reducing the band gap and producing visible light absorption (Martinez Suarez et al 2015). Especially, bismuth oxyhalides, as a typical layerstructured photocatalytic materials, have been successfully prepared and applied in the water purification of organic pollutants (Ahern et al 2015;Henle et al 2007;Sun et al 2015;Wang et al 2011). At the same time, its application in the field of air pollution control is quite rare (Ai et al 2009;Zhang et al 2013;Zhang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Bi $$_{5}$$ 5 O $$_{7}$$ 7 I Photocatalysts for Efficient Removal of NO in Air Under Visible Light

et al. 2017

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In this study, we report a flower-like Bi 5 O 7 I photocatalyst with a 41% gaseous nitride oxide (NO) removal efficiency under visible light through the in situ thermal treatment of the hierarchical architecture BiOI synthesized using a facile hydrothermal process. The UV-Vis diffuse reflectance spectroscopy and photocurrent experiments showed that the absorption band edge and photo-induced electron-hole pairs separation efficiency of Bi 5 O 7 I were negative than that of BiOI, whereas the as-prepared Bi 5 O 7 I exhibited excellent and stable visible light photocatalytic performance for NO removal as compared with original BiOI and P25. The results of electron spin resonance spectroscopy and density functional theory calculations suggested that the prominent visible light photocatalytic activity of obtained Bi 5 O 7 I has been attributed to the proper electron band structure which oxidizes the O 2 molecule to ·OH radicals with two electrons in the conduction band. Electronic supplementary materialThe online version of this article

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Visible Light Photocatalysis of BiOI and Its Photocatalytic Activity Enhancement by in Situ Ionic Liquid Modification

Cited by 276 publications

References 44 publications

Electronic Structure and Optical Properties of BiOI as a Photocatalyst Driven by Visible Light

Electronic Structure and Optical Properties of BiOI as a Photocatalyst Driven by Visible Light

Immobilization of Bi2O3 Particles on Activated Carbon Fiber and Its Photodegradation Performance for Pollutant Dyes

Three-Dimensional Bi $$_{5}$$ 5 O $$_{7}$$ 7 I Photocatalysts for Efficient Removal of NO in Air Under Visible Light

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