Synthesis and photocatalytic degradation activities of phosphorus containing ZnO microparticles under visible light irradiation for water treatment applications

Saffari, Reyhaneh; Shariatinia‬, Zahra; Jourshabani, Milad

doi:10.1016/j.envpol.2019.113902

Cited by 75 publications

(26 citation statements)

References 64 publications

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“…Therefore, 100 mg/L ZnO NPs catalyst dose was used during entire photocatalytic experiments. Previous studies indicate that OH radicals and positive holes play the major role in ZnO photodegradation process [31,32]. Owing to the increased yield of OH radicals as the dosage of ZnO increased, the proportion of reactive oxygen species that attack BPA and its intermediates increases.…”

Section: Photodegradation Of Bpamentioning

confidence: 99%

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Yang

Sahu

Shih

2021

Preprint

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Zinc oxide nanoparticles (ZnO NPs) have been widely investigated for applications in photocatalytic degradation of organic pollutants in wastewater. Despite the advantages of robust ZnO material, its photocatalytic activity is greatly affected by environmental factors. Halogen ions are commonly found in wastewater, which directly affect the pollutant aggregation and sedimentation, therefore it is necessary to discuss their effect on the photodegradation. The current study assesses the halogen ions effect on the photocatalytic degradation of bisphenol A (BPA) using different dosage of sodium chloride (NaCl) and sodium bromide (NaBr). The microstructural characterization of ZnO was conducted by transmission electron microscopy and hydrodynamic size was analyzed through dynamic light scattering. Degradation reactions of BPA with ZnO NPs followed pseudo-first-order kinetics. The increase of ZnO dosage from 0.01 g/L to 0.1 g/L enhanced the degradation rate constant of BPA up to 0.089 min− 1 (14.8 folds). In order to evaluate the the role halogen ions to degrade BPA, NaBr and NaCl were used. The degradation rate was reduced up to 26 folds (0.0034 min− 1) after the addition of NaBr, which was attributed to the increase in hydrodynamic particle size leading, thereby restricting the light adsorption capacity. Noteworthy, upon addition of NaCl from 10 mM to 500 mM concentration, there was only a slight decrease (2.4 folds, 0.037 min− 1) on the degradation rate of BPA. Therefore, this study unveils the role of chloride ions as an effective medium for BPA degradation by ZnO NPs, without aggregation, and provides a novel platform for the treatment of organic pollutants in saline water.

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Section: Photodegradation Of Bpamentioning

confidence: 99%

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Yang

Sahu

Shih

2021

Preprint

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“…Therefore, 100 mg L -1 ZnO NPs catalyst dose was used during entire photocatalytic experiments. Previous studies indicate that hydroxyl radicals and positive holes play the major role in ZnO photodegradation process (Chen et al 2020;Manikandan et al 2020;Saffari et al 2020). Owing to the increased yield of hydroxyl radicals as the dosage of ZnO increased, the proportion of reactive species that attack BPA and its intermediates increases.…”

Section: Photodegradation Of Bpamentioning

confidence: 99%

Influence of Aqueous Chloride and Bromide Anions on the Reactivity of ZnO on Bisphenol a Degradation

Yang

Sahu

Shih

2021

Preprint

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanoparticles have been widely investigated for applications in photocatalytic degradation of organic pollutants in wastewater. Despite the advantages of robust ZnO material, its photocatalytic activity is greatly affected by environmental factors. Halogen ions are commonly found in wastewater, which directly influence the pollutant aggregation and sedimentation, therefore it is necessary to discuss their effect on the photodegradation. The current study assesses the halogen ions effect on the photocatalytic degradation of BPA using different dosage of sodium chloride (NaCl) and sodium bromide (NaBr). The microstructural characterization of ZnO was conducted by transmission electron microscopy and hydrodynamic size was analyzed through dynamic light scattering. Degradation reactions of BPA with ZnO nanoparticles followed pseudo-first-order kinetics. The increase of ZnO dosage from 0.01 g/L to 0.1 g/L enhanced the degradation rate constant of BPA up to 0.089 min-1 (14.8 folds). In order to evaluate the the role halogen ions to degrade BPA, NaBr and NaCl were used. The degradation rate was reduced up to 26 folds (0.0034 min-1) after the addition of NaBr, which was attributed to the increase in hydrodynamic particle size leading, thereby restricting the light adsorption capacity. Noteworthy, upon addition of NaCl from 10 mM to 500 mM concentration, there was only a slight decrease (2.4 folds, 0.037 min-1) on the degradation rate of BPA. Therefore, this study unveils the role of chloride ions as an effective medium for BPA degradation by ZnO nanoparticles, without aggregation, and provides a novel platform for the treatment of organic pollutants in saline water.

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“…The continuous developments in novel techniques and routes that are capable of providing clean and safe water have become a significant interest for scientists [3]. Various technologies, such as electrochemical precipitation [4], ion exchange [5], reverse osmosis [6] and photocatalytic degradation [7], have been explored in the removal of pollutants from aqueous solutions. However, these methods have certain limitations.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

et al. 2021

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Graphene and its derivatives, especially graphene oxide (GO), are attracting considerable interest in the fabrication of new adsorbents that have the potential to remove various pollutants that have escaped into the aquatic environment. Herein, the development of GO/chitosan (GO/CS) composites as adsorbent materials is described and reviewed. This combination is interesting as the addition of graphene to chitosan enhances its mechanical properties, while the chitosan hydrogel serves as an immobilization matrix for graphene. Following a brief description of both graphene and chitosan as independent adsorbent materials, the emerging GO/CS composites are introduced. The additional materials that have been added to the GO/CS composites, including magnetic iron oxides, chelating agents, cyclodextrins, additional adsorbents and polymeric blends, are then described and discussed. The performance of these materials in the removal of heavy metal ions, dyes and other organic molecules are discussed followed by the introduction of strategies employed in the regeneration of the GO/CS adsorbents. It is clear that, while some challenges exist, including cost, regeneration and selectivity in the adsorption process, the GO/CS composites are emerging as promising adsorbent materials.

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Synthesis and photocatalytic degradation activities of phosphorus containing ZnO microparticles under visible light irradiation for water treatment applications

Cited by 75 publications

References 64 publications

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Influence of Aqueous Chloride and Bromide Anions on the Reactivity of ZnO on Bisphenol a Degradation

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

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Synthesis and photocatalytic degradation activities of phosphorus containing ZnO microparticles under visible light irradiation for water treatment applications

Cited by 75 publications

References 64 publications

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Influence of aqueous chloride and bromide anions on the reactivity of ZnO on bisphenol A degradation

Influence of Aqueous Chloride and Bromide Anions on the Reactivity of ZnO&nbsp;on Bisphenol a Degradation

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

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Influence of Aqueous Chloride and Bromide Anions on the Reactivity of ZnO on Bisphenol a Degradation