Sunlight assisted degradation of toxic phenols by zinc oxide doped prussian blue nanocomposite

Rachna,; Rani, Manviri; Shanker, Uma

doi:10.1016/j.jece.2020.104040

Cited by 66 publications

(22 citation statements)

References 57 publications

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“…Rafie et al ( 2019 ) used Fe 3+ ‐doped ZnO to treat Reactive Black 5 (RB5) bisazo dye, and the degradation rate was observed to be up to 98.32% within 3 h. Hu et al ( 2019 ) doped Ce on ZnO rods via the one‐step pyrolysis method and found that 3% Ce exhibited the best RhB degradation rate, which degraded 97.66% within 2 h. Rachna et al ( 2020 ) coupled Prussian blue (FeHCF) on ZnO through a solvothermal method to treat phenol, 3‐aminophenol (3‐AP), and 2,4‐dinitrophenol (2,4‐DNP) under sunlight and achieved the maximum 95%, 97%, and 93% degradation efficiency, respectively. Wei et al ( 2019 ) prepared Fe 3 O 4 /ZnO/ZnS for MB removal, which removed 75.3% within 4 h. The Ag‐coated ZnO nanoflowers show a similar result with about 98.32% MB degradation efficiency (Shahid et al, 2020 ). Recently, Bora et al ( 2022 ) synthesized Ag 2 CO 3 /ZnO via a simple precipitation route and reported it can achieve a totally TOC removal for MB wastewater in 30 min and 32% disinfection of Escherichia coli in an hour.…”

Section: Water Contaminant Treatmentmentioning

confidence: 94%

“…Similarly, Duan et al (2020) used a two-step hydrothermal method to synthesize ZnO/Bi 2 WO 6 and proved that its photocurrent intensity is three times that of ZnO and Bi 2 WO 6 . Rafie et al (2019) used Fe 3+ -doped ZnO to treat Reactive Black 5 (RB5) bisazo dye, and the degradation rate was observed to be up to 98.32% within 3 h. Hu et al (2019) doped Ce on ZnO rods via the one-step pyrolysis method and found that 3% Ce exhibited the best RhB degradation rate, which degraded 97.66% within 2 h. Rachna et al (2020) coupled Prussian blue (FeHCF) on ZnO through a solvothermal method to treat phenol, 3-aminophenol (3-AP), and 2,4-dinitrophenol (2,4-DNP) under sunlight and achieved the maximum 95%, 97%, and 93% degradation efficiency, respectively. Wei et al (2019) prepared Fe 3 O 4 /ZnO/ZnS for MB removal, which removed 75.3% within 4 h. The Ag-coated ZnO nanoflowers show a similar result with about 98.32% MB degradation efficiency (Shahid et al, 2020).…”

Section: Zno Compositesmentioning

confidence: 99%

“…ZnO also has similar drawbacks; it has a wide band gap energy (3.3 eV), high photocorrosion activity, high electron mobility (200–300 cm 2 /V/s), low quantum efficiency, high h + and e − recombination rate, long electron lifetime (>10 s) (Ani et al, 2018 ; Hu et al, 2019 ; Serra, Gomez, & Philippe, 2019 ), and potential ecotoxicological effects (Serra et al, 2020 ). In addition, in this particular case, ZnO can cause ecotoxicological effects, especially relevant for some microorganisms, such as microalgae (Djearamane et al, 2018 ; Shahid et al, 2020 ).…”

Section: Visible Light Active Photocatalystsmentioning

confidence: 99%

“…Also, research has proved dopants can improve photocatalysis efficiency by reducing the requirement of absorbed energy, shifting absorbed light to visible wavelength, and enhancing photocatalysis activity (Ani et al, 2018 ; Yusuff et al, 2020 ). Some examples include nitrogen (Shaniba et al, 2020 ), pumice (Yusuff et al, 2020 ), Ag (Shahid et al, 2020 ), Ni (Serra, Zhang, et al, 2019 ), and Prussian blue (Rachna et al, 2020 ). Also, combining TiO 2 or ZnO with other semiconductors to form heterojunction photocatalysts has been wildly studied, like black TiO 2 /g‐C 3 N 4 (L. Shen et al, 2017 ) and ZnO/Bi 2 WO 6 (Duan et al, 2020 ).…”

Section: Visible Light Active Photocatalystsmentioning

confidence: 99%

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Application of visible light active photocatalysis for water contaminants: A review

Sun

O’Connell

2022

Water Environment Research

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Organic water pollutants are ubiquitous in the natural environment arising from domestic products as well as current and legacy industrial processes. Many of these organic water pollutants are recalcitrant and only partially degraded using conventional water and wastewater treatment processes. In recent decades, visible light active photocatalyst has gained attention as a non‐conventional alternative for the removal of organic pollutants during water treatment, including industrial wastewater and drinking water treatment. This paper reviews the current state of research on the use of visible light active photocatalysts, their modified methods, efficacy, and pilot‐scale applications for the degradation of organic pollutants in water supplies and waste streams. Initially, the general mechanism of the visible light active photocatalyst is evaluated, followed by an overview of the major synthesis techniques. Because few of these photocatalysts are commercialized, particular attention was given to summarizing the different types of visible light active photocatalysts developed to the pilot‐scale stage for practical application and commercialization. The organic pollutant degradation ability of these visible light active photocatalysts was found to be considerable and in many cases comparable with existing and commercially available advanced oxidation processes. Finally, this review concludes with a summary of current achievements and challenges as well as possible directions for further research. Practitioner Points Visible light active photocatalysis is a promising advanced oxidation process (AOP) for the reduction of organic water pollutants. Various mechanisms of photocatalysis using visible light active materials are identified and discussed. Many recent photocatalysts are synthesized from renewable materials that are more sustainable for applications in the 21st century. Only a small number of pilot‐scale applications exist and these are outlined in this review.

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Section: Water Contaminant Treatmentmentioning

confidence: 94%

Section: Zno Compositesmentioning

confidence: 99%

Section: Visible Light Active Photocatalystsmentioning

confidence: 99%

Section: Visible Light Active Photocatalystsmentioning

confidence: 99%

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Application of visible light active photocatalysis for water contaminants: A review

Sun

O’Connell

2022

Water Environment Research

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“…They are commonly used to degrade organic pollutants and demonstrate good application prospects in the field of catalysis [10][11][12]. However, the fast recombination rate of electron-hole pairs in these photocatalysts restricts their application in photocatalytic technologies [13][14][15]. Generally, ZnO and TiO 2 form composites with substrate materials with large specific surface areas.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Photoelectrocatalytic Applications of TiO2/ZnO/Diatomite Composites

Yang

Wang

et al. 2022

Catalysts

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ZnO and TiO2 are semiconductor nanomaterials that are widely used in photocatalysis. However, the relatively high recombination rate and low quantum yield of photogenerated electron–hole pairs limit their practical applications. In this study, a series of TiO2/ZnO/diatomite composites with various compositions were successfully prepared via a two-step precipitation method. They exhibited stronger UV–visible absorption properties and substantially lower fluorescence intensities than those of ZnO and ZnO/diatomite, which was mainly due to the low recombination rate of the photogenerated electron–hole pairs in the composite system. The reaction intermediates of methylene blue were detected by liquid chromatography–mass spectrometry, and the degradation process was determined. The best composite catalyst was used for the degradation of gaseous methylbenzene and gaseous acetone. The gaseous acetone degradation product was determined to be acetaldehyde via gas chromatography–mass spectrometry. The results show that the composite catalyst exhibited a good photocatalytic degradation of both liquid pollutants and harmful volatile gases. When applied to the hydrogen and oxygen evolution reactions, the composite catalyst retained a good photoresponsivity and electrolytic efficiency.

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2D Functionalized Germananes: Synthesis and Applications

Pumera

2022

Advanced Materials

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Figure 2. a) Optical microscope image of a CaGe 2 ingot. b) Schematic diagram of the crystal structures of 2H, 3R, 4H, 6RCaGe 2 , and 1HEuGe 2 .The black rectangles outline the hexagonal unit cells. c) HAADF-STEM images of 3R, 4H, and 6RCaGe 2 in the [100] incident directions, with the stimulated pattern shown in the rectangular panel at the corner and the overlay of Ca and Ge elemental mapping of 3RCaGe 2 . a-c) Reproduced with permission. [73] Copyright 2018, Elsevier. d) Scheme of the fluoride diffusion into CaGe 2 , forming CaGe 2 F x (0 < x < 1.8), a compound that contains multilayer germanane. e) Composition of different types of germanene present within CaGe 2 F x (0.2 < x < 1.5). f) HAADF-STEM images of (top) m-, i-, and w-BLGe, and (bottom) i,i-, m,m-, and i,m-TLGe, where m = mirror, i = inversion, w = wavy, BL = bilayer, TL = trilayer. d-f) Reproduced with permission. [87]

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Sunlight assisted degradation of toxic phenols by zinc oxide doped prussian blue nanocomposite

Cited by 66 publications

References 57 publications

Application of visible light active photocatalysis for water contaminants: A review

Application of visible light active photocatalysis for water contaminants: A review

Synthesis and Photoelectrocatalytic Applications of TiO2/ZnO/Diatomite Composites

2D Functionalized Germananes: Synthesis and Applications

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