Raw clay supported ZnO nanoparticles in photodegradation of 2-chlorophenol under direct solar radiations

Zyoud, Ahed; Asaad, Sara; Zyoud, Samer H.; Zyoud, Shaher H.; Helal, Muath; Qamhieh, Naser; Hajamohideen, AbdulRazack; Hilal, Hikmat S.

doi:10.1016/j.jece.2020.104227

Cited by 31 publications

(10 citation statements)

References 44 publications

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“…Under solar irradiation, electrons and holes are formed in the conduction band and in the valance band of the ZnO, respectively (Equation (1)). Photogenerated electrons can react with dissolved oxygen to produce ·O2 − (Equation (2)), as reported in the literature [ 57 ]. Simultaneously, the reaction between the water molecules and holes results in the generation of ·OH, according to Equation (3).…”

Section: Resultsmentioning

confidence: 99%

“…H 2 O 2 molecules are very reactive with electrons to form ·OH and hydroxide ion species (OH - ), as indicated in Equation (5). The OH − produced can also react with h + to produce ·OH (Equation (6)) [ 57 , 58 , 59 ]. The resulting active species, including h + , ·OH, and ·O 2 − , contribute to the oxidization of CIP to end products (water and carbon dioxide), or to degradation byproducts that remain in the reaction medium (Equation (7)).…”

Section: Resultsmentioning

confidence: 99%

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ZnO/γ-Fe2O3/Bentonite: An Efficient Solar-Light Active Magnetic Photocatalyst for the Degradation of Pharmaceutical Active Compounds

et al. 2022

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For applications related to the photocatalytic degradation of environmental contaminants, engineered nanomaterials (ENMs) must demonstrate not only a high photocatalytic potential, but also a low tendency to agglomeration, along with the ability to be easily collected after use. In this manuscript, a two-step process was implemented for the synthesis of ZnO, ZnO/Bentonite and the magnetic ZnO/γ-Fe2O3/Bentonite nanocomposite. The synthesized materials were characterized using various techniques, and their performance in the degradation of pharmaceutical active compounds (PhACs), including ciprofloxacin (CIP), sulfamethoxazole (SMX), and carbamazepine (CBZ) was evaluated under various operating conditions, namely the type and dosage of the applied materials, pH, concentration of pollutants, and their appearance form in the medium (i.e., as a single pollutant or as a mixture of PhACs). Among the materials studied, ZnO/Bentonite presented the best performance and resulted in the removal of ~95% of CIP (5 mg/L) in 30 min, at room temperature, near-neutral pH (6.5), ZnO/Bentonite dosage of 0.5 g/L, and under solar light irradiation. The composite also showed a high degree of efficiency for the simultaneous removal of CIP (~98%, 5 mg/L) and SMX (~97%, 5 mg/L) within 30 min, while a low degradation of ~5% was observed for CBZ (5 mg/L) in a mixture of the three PhACs. Furthermore, mechanistic studies using different types of scavengers revealed the formation of active oxidative species responsible for the degradation of CIP in the photocatalytic system studied with the contribution of h+ (67%), OH (18%), and ·O2− (10%), and in which holes (h+) were found to be the dominant oxidative species.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

ZnO/γ-Fe2O3/Bentonite: An Efficient Solar-Light Active Magnetic Photocatalyst for the Degradation of Pharmaceutical Active Compounds

et al. 2022

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“…The purpose of the thermogravimetric analysis was to investigate the thermal stability and the 0.51% weight loss during heating at temperatures closer to 100 C can be attributed to the evaporative removal of physically adsorbed humidity on media (Favero et al, 2016,; mineralogical changes that the adsorbent can undergo during heating (Mac Ias-Quiroga et al, 2018). The fresh and loaded adsorbent was heated from room temperature to approximately 1000 C at a heating rate of 15 C per minute as per Zyoud et al (2020). The thermographs in Figure 4 illustrate the weight loss of the fresh, heavy metal loaded clay brick waste during heating.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Investigation of clay brick waste for the removal of copper, nickel and iron from aqueous solution: batch and fixed – bed column studies

Mokokwe

Letshwenyo²

2022

Heliyon

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“…– 11.68 mmoles/L [8] (TNTs/ACF) 59.9 (mg/g) pH- 5, conc.- 20 mg/L, time – 15 min [9] ZnO/Clay > 16% pH-7, conc. – 20 mg/L, mass- 0.2 g [10] Clay > 20% pH-7, conc. – 20 mg/L, mass- 0.2 g, [10] ZnO > 4% pH-7, conc.…”

Section: Data Descriptionmentioning

confidence: 99%

“…– 20 mg/L, mass- 0.2 g, [10] ZnO > 4% pH-7, conc. – 20 mg/L, mass- 0.2 g, [10] C 3 N 4 /TiO 2 -NTs 27.45 mg/g pH-7, conc. – 40 mg/L, mass- 0.05 g This work TiO 2 —NTs 27.5 mg/g pH-7, conc.…”

Section: Data Descriptionmentioning

confidence: 99%

Adsorption and photocatalytic scavenging of 2-chlorophenol using carbon nitride-titania nanotubes based nanocomposite: Experimental data, kinetics and mechanism

2021

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Adsorption and interaction of pollutant species on surface of the catalyst materials play an important role on the photocatalysis process. Herein, experimental data on the adsorption behavior of 2-chlorophenol (2-CP) onto graphitic pure carbon nitride (C 3 N 4 ), titania nanotubes (TiO 2 —NTs) and carbon nitride/titania nanotubes nanocomposite (C 3 N 4 /TiO 2 —NTs) from synthetic wastewater has been summarized. The data on photocatalytic degradation of the 2-CP under both ultraviolet (UV) and visible light irradiation is also presented. This work also evaluates the 2-CP scavenging efficiency of C 3 N 4 /TiO 2 —NTs nanocomposite prepared by calcination of 2 wt.% melamine with TiO 2 —NTs at 450 °C. The adsorption and photocatalysis experiments were conducted for 180 min at pH 7 with 100 mL solution of 2-CP (40 mg/L) and 0.05 g catalyst material. The acquired data can be valuable to identify the equilibrium time for 2-CP adsorption onto C 3 N 4 , TiO 2 —NTs, and C 3 N 4 /TiO 2 —NTs nanocomposite. Moreover, the obtained data can be useful to identify the suitable light source for the decomposition of 2-CP in the aquatic environment. The evaluated kinetic data might be significant for identifying the adsorption and photocatalysis reaction rate onto the applied catalyst materials. The obtained adsorption and photocatalysis data have been compared with that in literature to identify the adsorption and photocatalysis behavior of 2-CP on numerous catalysts at different experimental conditions.

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Raw clay supported ZnO nanoparticles in photodegradation of 2-chlorophenol under direct solar radiations

Cited by 31 publications

References 44 publications

ZnO/γ-Fe2O3/Bentonite: An Efficient Solar-Light Active Magnetic Photocatalyst for the Degradation of Pharmaceutical Active Compounds

ZnO/γ-Fe2O3/Bentonite: An Efficient Solar-Light Active Magnetic Photocatalyst for the Degradation of Pharmaceutical Active Compounds

Investigation of clay brick waste for the removal of copper, nickel and iron from aqueous solution: batch and fixed – bed column studies

Adsorption and photocatalytic scavenging of 2-chlorophenol using carbon nitride-titania nanotubes based nanocomposite: Experimental data, kinetics and mechanism

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