Preparation of activated carbon@ZnO composite and its application as a novel catalyst in catalytic ozonation process for metronidazole degradation

Nasseh, Negin; Arghavan, Fatemeh Sadat; Rodríguez‐Couto, Susana; Panahi, Ayat Hossein; Esmati, Marzieh; A-Musawi, Tariq J.

doi:10.1016/j.apt.2019.12.006

Cited by 96 publications

(29 citation statements)

References 28 publications

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“…In the case of ZnO/C nanocomposite, the FT-IR transmission peak corresponding to the metal-oxygen bonding is observed at 490 cm -1 , 541 cm -1 and 593 cm -1 [37]. In both the samples, the transmission peak was observed at 871 cm -1 , which corresponds to the formation of tetrahedral coordination of Zn atoms in the ZnO crystal structure [38]. The strong peak is observed at 1377 cm -1 of both ZnO and ZnO/C nanostructures and it corresponds to the unreacted zinc nitrate groups from the zinc precursors.…”

Section: Functional Group Analysismentioning

confidence: 94%

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Shibu

Benoy²,

Shanavas

et al. 2021

J Mater Sci: Mater Electron

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We developed an improved hexagonal wurtzite ZnO and ZnO/C microflowers through the facile hydrothermal technique. The obtained nanostructures were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDX) and UV-visible diffuse reflectance spectroscopy (UV-Vis DRS). The formation of flower-like material is confirmed using SEM and TEM analysis with an average diameter of about 2 lm composed of several plate-like nanostructures. The optical analysis results show that the presence of carbon particles with ZnO structures has significantly increased the light absorption ability of nanocomposite. The photocatalytic degradation ability of prepared nanostructures was examined using methylene blue as a model pollutant. The obtained results show that the photocatalytic degradation ability of ZnO/C nanostructures is approximately two times higher than the pristine ZnO microflowers. Based on the investigation, an enhancement of the photocatalytic ability of ZnO/C nanocomposite is achieved due to the synergistic effect between carbon particles and flower-like ZnO nanostructures.

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Section: Functional Group Analysismentioning

confidence: 94%

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Shibu

Benoy²,

Shanavas

et al. 2021

J Mater Sci: Mater Electron

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“…The first is the transportation of ozone from gas phase into liquid phase (direct effect). The second is degradation of ozone into various radicals (indirect effect) (Nasseh et al 2019). In general, the rate of ozone decomposition increases with increasing solution pH since the hydroxyl ions catalyst the decay of ozone to form radicals serving as reactive species (Li et al 2008).…”

Section: Effect Of Phmentioning

confidence: 99%

“…(9) were judged according to the values of determination of coefficient (R 2 ). However, the kinetic reaction rate parameter (k a ) for first-order model is determined from the slope of the best fit line of the plot of Ln (C/Co) versus reaction time (t), to second-order model is determined from the slope of the best fit line of the plot of (1/C) (Nasseh et al 2019). The results of these parameters are listed in Table 1 and Table 2.…”

Section: Kinetics Studymentioning

confidence: 99%

“…Antibiotics are a large group of medicines used to treat infectious diseases in humans and animals caused by various types of bacteria. According to reports, about 15% of the world's total manufactured drugs are antibiotics (Nasseh et al 2019). Pharmaceutical antibiotics are biologically active compounds that are often soluble in water, but not easily biodegradable in natural circumstances.…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of heterogeneous catalyst is the easy separation of the catalyst from the liquid and the possibility to reuse the catalyst (Gharbani and Mehrizad 2014). Among the catalysts, metal oxides, such as zinc oxide (ZnO) nanoparticles, have a high potential for application in water and wastewater treatment due to their high surface area and low cost of production (Nasseh et al 2019). In addition, ZnO has a number of antimicrobial, adsorptive, and toxicant favorable degradation properties (Cuerda-Correa et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Catalytic ozonation for removal of antibiotic oxy-tetracycline using zinc oxide nanoparticles

Mohsin

Mohammed

2021

Appl Water Sci

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The traditional wastewater treatment plants are mostly not designed to deal with polar micropollutants such as pharmaceuticals. Therefore, antibiotics must be completely removed before their emission to ecosystems. Catalytic ozonation is used to increase the efficiency of sole ozonation further. In the present study, semi-batch experiments were conducted to investigate the efficiency of sole ozonation and catalytic ozonation in the degradation of oxy-tetracycline (OTC) as an environmental hazards contaminant in an aqueous solutions. Zinc oxide nanoparticles (ZnO) were used as a catalytic agent with ozone (ZnO/$${\mathrm{O}}_{3})$$ O 3 ) . The influence of operational parameters such as pH (3–11), initial oxy-tetracycline concentration (10–100) mg/l, temperature (15–35)°C, ozone generation rate (0.138–1.38)mg/s and catalyst dosage (25–200) mg/l on the ZnO/$${\mathrm{O}}_{3}$$ O 3 process was investigated. Ozone dosage was found to have the noticeable effect on the degradation process; however, the ZnO dosage was found to be less effective. The optimum condition was 1.38 mg/s at pH = 7, and after 35 min, a 94% of OTC removal was achieved. The results demonstrated that catalytic ozonation was a very effective method for degradation and mineralization of OTC in aqueous solution.

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BiOI/ZnO Heterojunction for Increased Photodegradation of Metronidazole under Visible Light Irradiation

et al. 2023

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A heterojunction interface with a rational design can overcome the limitation of a single photocatalyst structure and enable the separation and transport of photogenerated carriers. p-n Heterojunctions of BiOI/ZnO nano-flake were achieved by a simple one-step hydrothermal process for metronidazole (MNZ) degradation under visible light. The measurements show that the BiOI/ZnO could completely remove MNZ within 180 min, which is 2.6 times and 4.8 times higher than that of pristine ZnO and BiOI, respectively. Under visible light irradi-ation, the electrostatic field formed within the p-n heterojunction drives the flow of photogenerated electrons from the conduction band of BiOI to the conduction band of ZnO, while the holes are retained, promoting photogenerated carrier separation and enhancing photocatalytic efficiency. The fact that BiOI/ZnO good stability and reusability demonstrates the importance of heterostructure construction of two different semiconductors in overcoming the defects of traditional semiconductor materials.

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Preparation of activated carbon@ZnO composite and its application as a novel catalyst in catalytic ozonation process for metronidazole degradation

Cited by 96 publications

References 28 publications

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Hydrothermal synthesis of ZnO/C microflowers for photocatalytic degradation of organic pollutants under visible light irradiation: kinetics, mechanism and recyclability

Catalytic ozonation for removal of antibiotic oxy-tetracycline using zinc oxide nanoparticles

BiOI/ZnO Heterojunction for Increased Photodegradation of Metronidazole under Visible Light Irradiation

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