Modulation of valence band maximum edge and photocatalytic activity of BiOX by incorporation of halides

Lv, Jiaxin; Hu, Qingsong; Cao, Chengjin; Zhao, Yaping

doi:10.1016/j.chemosphere.2017.09.149

Cited by 73 publications

(25 citation statements)

References 57 publications

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“…It indicates that SO 4 •− radicals were revealed as a primary radical species in the Fe 3 O 4 @GO + K 2 S 2 O 8 system. As can be seen, the degradation efficiency of RhB was also not affected much by the addition of AA in the solution, suggesting that the oxidation of RhB was promoted by the O 2 •− radical that appeared through the dissolved oxygen [40].…”

Section: Identification Of Reactive Oxygen Species (Ros)mentioning

confidence: 89%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe 3 O 4 impregnated graphene oxide (Fe 3 O 4 @GO)-activated persulfate system (Fe 3 O 4 @GO+K 2 S 2 O 8 ) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe 3 O 4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO 4 − was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe 3 O 4 @GO+K 2 S 2 O 8 system was discussed. Finally, the results indicate that the persulfate-activated Fe 3 O 4 @GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.Water 2020, 12, 733 2 of 17 many advantages, such as a higher redox potential, wide pH range (2-11), longer life span, and more efficiency over •OH that enables excellent electron transfer of the oxidant toward higher contaminant degradation [6,7]. In general, the production of sulfate radicals can be obtained through PS activation by using several strategies, such as heat, ultraviolet, ultrasound, transition metal ions, carbonaceous-based materials, base, phenol, glucose, and ascorbic acid [8]. Consequently, transition-metal-based catalysts have been widely utilized as a PS activator due to their excellent catalytic efficiency [9]. However, the drawbacks of transition-metal-based catalysts for inhomogeneous systems include poor removal efficiency, precipitation of iron (III) as sludge, and less reusability, which has hindered their widespread use [10]. Hence, transition-metal-based heterogeneous catalyst systems have received tremendous attention for PS activation because of their environmentally friendly nature, high performance, simple operation stability, and high availability [11]. Iron (Fe)-based heterogeneous catalyst materials (e.g., Fe 3 O 4 ) have received much attention regarding frequently activating PS because of their high natural abundance, low price, and they could easily prevent secondary pollution through their recovery performance [12]. However, Fe 3 O 4 nanoparticles usually tend to aggregate in the solution, which can decrease their surface area and cause lower stability and catalytic efficiency [13]. Taking this into consideration, it is necessary to use a proper support that can enhance their overall performance. Graphene has been widely reported to be an emerging supporting material f...

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Section: Identification Of Reactive Oxygen Species (Ros)mentioning

confidence: 89%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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“…They also can enhance the electron transfer kinetics between wider range of electro‐active species and the electrode surface [23]. In addition, BiOX (X=Cl, Br, I) is one of the kinds of very good semi‐conductor materials with numerous benefits like higher catalytic activities, acceptable stability, easy procurement procedure and lower environmental poisonousness [24]. It is notable that the origin of outstanding functions of BiOX (X=Cl, Br, I) is basically their layered structure that contains [Bi 2 O 2 ] slabs inter‐leaved with double halogen atom slabs [25].…”

Section: Introductionmentioning

confidence: 99%

A Novel Electrochemical Sensor Based on FeNi₃/CuS/ BiOCl Modified Carbon Paste Electrode for Determination of Bisphenol A

Malakootian

Hamzeh

2020

Electroanalysis

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In this study, we used voltammetric method in order to examine the electrochemical behavior of BPA. Hence, we constructed a new electrochemical sensor to detect BPA on the basis of the modified carbon paste electrode using FeNi3/CuS/BiOCl as a novel nanocomposite. Results showed that when using optimized conditions, the new BPA sensor has a wide linear range between 0.1 μM and 300 μM, lower limit of detection of 0.05 μM, and good reproducibility and stability. Based on the findings, it could be concluded that our sensor can be substantially utilized for detecting BPA in the food samples with reasonable outputs.

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“…Up to now, a few studies have compared the activity of BiOX (X = Cl, Br and I) for photocatalytic degradation of organic dyes [18][19][20][21][22]. Chang et al [18] synthesized crystalline BiOX (X = Cl, Br and I) with the sheet-like morphologies using NaBiO 3 and HX (X = Cl, Br and I) as the raw materials.…”

Section: Introductionmentioning

confidence: 99%

“…Jia et al [21] fabricated BiOX (X = Cl, Br and I) by the solvothermal method using tetrabutylammonium halide as the halogen source, and BiOCl and BiOBr demonstrated higher photocatalytic activity compared with BiOI to degrade RhB and salicylic acid under ultravioletvisible (UV-Vis) light irradiation. Lv et al [22] synthesized BiOX (X = Cl, Br and I) samples with the same nanosheet morphology, BiOCl compared with BiOBr and BiOI exhibited the highest photocatalytic activity to degrade OII, MB and phenol under UV-Vis irradiation due to its high oxidative activity of generated h + radicals, while it nearly has no photoactivity under visible light irradiation. In spite of these efforts, more attempts are still needed to optimize the bismuth oxyhalides for practical application.…”

Section: Introductionmentioning

confidence: 99%

Investigation of photodegradation of rhodamine B over a BiOX (X = Cl, Br and I) photocatalyst under white LED irradiation

et al. 2019

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In this study, a low temperature precipitation method was applied to prepare BiOX (X = Cl, Br and I) nanostructures using HCl, HBr and HI as halogen sources. The as-prepared samples were characterized by various techniques such as X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy, Fourier-transform infrared spectroscopy, diffuse reflectance spectroscopy and nitrogen adsorption-desorption analysis. The photoactivity of BiOX samples to degrade rhodamine B (RhB) molecules in aqueous solution was investigated under white LED irradiation. The results indicated that BiOCl exhibits a higher photodegradation performance in comparison with BiOBr and BiOI. Ninety six percent of the RhB molecules was degraded over BiOCl after 25 min light irradiation, whereas under the same conditions, the degradation efficiencies of BiOBr and BiOI samples are 62 and 24%, respectively. The enhanced photodegradation activity of BiOCl is ascribed to the higher specific surface area which increases the physical adsorption of RhB molecules on the photocatalyst surface. Moreover, the photodegradation mechanism and the main radical species in the degradation reactions over BiOCl were investigated.

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Modulation of valence band maximum edge and photocatalytic activity of BiOX by incorporation of halides

Cited by 73 publications

References 57 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

A Novel Electrochemical Sensor Based on FeNi₃/CuS/ BiOCl Modified Carbon Paste Electrode for Determination of Bisphenol A

Investigation of photodegradation of rhodamine B over a BiOX (X = Cl, Br and I) photocatalyst under white LED irradiation

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Modulation of valence band maximum edge and photocatalytic activity of BiOX by incorporation of halides

Cited by 73 publications

References 57 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

A Novel Electrochemical Sensor Based on FeNi3/CuS/ BiOCl Modified Carbon Paste Electrode for Determination of Bisphenol A

Investigation of photodegradation of rhodamine B over a BiOX (X = Cl, Br and I) photocatalyst under white LED irradiation

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Product

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A Novel Electrochemical Sensor Based on FeNi₃/CuS/ BiOCl Modified Carbon Paste Electrode for Determination of Bisphenol A