Recent progress on bismuth oxyiodide (BiOI) photocatalyst for environmental remediation

Arumugam, Malathi; Choi, Myong Yong

doi:10.1016/j.jiec.2019.09.013

Cited by 173 publications

(45 citation statements)

References 135 publications

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“…BiOI synthesized in this work is characterized by the higher degradation rate of 5-FU than Bi 4 O 5 I 2 prepared via ionic liquids reported by our research group [16]. It is believed that Bi 4 O 5 I 2 has a stronger redox ability than BiOI [49,50]. However, the results implying the beneficial influence of mannitol on the redox potential of holes photogenerated under irradiated BiOI.…”

Section: Photocatalytic Activitymentioning

confidence: 59%

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

et al. 2021

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BiOX (X=Cl, Br, I) photocatalysts with dominant (110) facets were synthesized via a mannitol-assisted solvothermal method. This is the first report on the exposed (110) facets-, size-, and defects-controlled synthesis of BiOX achieved by solvothermal synthesis with mannitol. This polyol alcohol acted simultaneously as a solvent, capping agent, and/or soft template. The mannitol concentration on the new photocatalysts morphology and surface properties was investigated in detail. At the lowest concentration tested, mannitol acted as a structure-directing agent, causing unification of nanoparticles, while at higher concentrations, it functioned as a solvent and soft template. The effect of exposed (110) facet and surface defects (Bi(3−x)+, Bi4+, Bi5+) of BiOX on the photocatalytic activity of nanomaterials under the UV–Vis irradiation were evaluated by oxidation of Rhodamine B (RhB) and 5-fluorouracil (5-FU), an anticancer drug, and by reduction of Cr(VI). Additionally, the influence of crucial factors on the formation of BiOX in the synthesis with mannitol was discussed extensively, and the mechanism of BiOX formation was proposed. These studies presented a new simple method for synthesizing BiOX without any additional surfactants or shape control agents with good photocatalytic activity. The study also provided a better understanding of the effects of solvothermal conditions on the BiOX crystal growth.

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Section: Photocatalytic Activitymentioning

confidence: 59%

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

et al. 2021

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“…The BiOI architectures were generated from the nanosheet arrays from the center to the surface of the spheres. In addition, it is well-accepted that BiOI shows a unique layered structure composed of [Bi 2 O 2 ] 2+ slabs interleaved by double slabs of iodine atoms [ 15 ]. It should be noted that ethylene glycol (EG), as a solvent, also plays an important role in controlling the final morphology of the sample.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, the development of visible-light-active photocatalysts is a challenging and promising research topic in the field of environmental protection. The removal of organic pollutants in wastewater can be performed very easily by the utilization of economical sunlight [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Sunlight-Active BiOI Photocatalyst as an Efficient Adsorbent for the Removal of Organic Dyes and Antibiotics from Aqueous Solutions

et al. 2021

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A bismuth oxyiodide (BiOI) photocatalyst with excellent sunlight-driven performance was synthesized by a solvothermal route without the addition of surfactants or capping agents. The prepared photocatalyst exhibited a tetragonal phase with an energy band gap of 2.15 eV. The efficiency of the photocatalyst was elucidated by monitoring the photodegradation of organic dyes and antibiotics. The BiOI photocatalyst provided a 95% removal of norfloxacin (NOR) antibiotics under visible light illumination. Interestingly, the complete removal of Rhodamine B (RhB) dye was achieved after 80 min of natural sunlight irradiation. The photodegradation reaction followed the first-order reaction. Both photo-generated holes and electrons play vital roles in the photodegradation of the pollutant. The BiOI photocatalyst remains stable and still shows a high efficiency even after the fifth run. This confirms the great cycling ability and high structural stability of the photocatalyst. The prepared BiOI catalyst, with a high surface area of 118 m2 g−1, can act as an excellent adsorbent as well. The synergistic effect based on both adsorption and photocatalysis is a key factor in achieving a very high removal efficiency. The photoactivity under sunlight is higher than that observed under visible light, supporting the practical use of the BiOI photocatalyst for the removal of organic pollutants in wastewater through the utilization of abundant solar energy.

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“…There is also a transition of electrons from valence to conduction bands in case of conductors and semiconductors. 134,135 Additional extrinsic energy levels are created between the energy bandgap on adding non-metal dopants. This justification is supported by two hypotheses: (i) valence band is shifted upwards to its maximum level as a result of hybridization of valence orbitals of non-metal elements (ii) the localized states from valence orbits of non-metal elements.…”

Section: Non-metals Dopingmentioning

confidence: 99%

A review on bismuth oxyhalide based materials for photocatalysis

et al. 2021

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Recent progress on bismuth oxyiodide (BiOI) photocatalyst for environmental remediation

Cited by 173 publications

References 135 publications

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

Sunlight-Active BiOI Photocatalyst as an Efficient Adsorbent for the Removal of Organic Dyes and Antibiotics from Aqueous Solutions

A review on bismuth oxyhalide based materials for photocatalysis

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