Morphology/facet-dependent photo-Fenton-like degradation of pharmaceuticals and personal care products over hematite nanocrystals

Asif, Abdul Hannan; Rafique, Nasir; Hirani, Rajan Arjan Kalyan; Wu, Hong; Shi, Lei; Zhang, Shu; Wang, Shaobin; Yu, Yin; Saunders, Martin; Sun, Hongqi

doi:10.1016/j.cej.2021.134429

Cited by 23 publications

(4 citation statements)

References 83 publications

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“…Figure e depicts the deconvoluted spectra of O 1s, which can be fitted by three components at binding energies of 529.05, 530.43, and 530.68 eV. These component fittings can be assigned to the oxygenated species (Fe–O/CO/B–O), hydroxylated species (Fe–OH/C–OH/B–OH), and carbon-bonded species (C–O) respectively. , Furthermore, the resulting spectrum of Fe 2p deconvolution reveals two peaks for Fe 3+ (710.43 and 724.23 eV) along with two additional shake-up satellites at 718.8 and 732.2 eV and are in agreement with the reported literature. − …”

Section: Resultsmentioning

confidence: 94%

Amorphous FeOOH Anchored on Boron and Nitrogen Codoped Carbon Nanotubes for Fenton-like Oxidation of Sulfamethoxazole

Asif

Shi

et al. 2023

J. Phys. Chem. C

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Amorphous iron oxide/hydroxides with structural disorder can be a potential alternative to typical crystalline structures when applied in environmental nanotechnology. In this work, novel amorphous FeOOH quantum dots (QDs) anchored on boron and nitrogen codoped graphene nanotubes (FeOOH@BNG) with different Fe loadings were synthesized and applied in the degradation of common antibiotic pollutant sulfamethoxazole (SMX). The as-fabricated catalysts were characterized by a series of physicochemical and thermal techniques, revealing the highly dispersive FeOOH QDs on the BNG surface. The as-prepared catalyst shows excellent catalytic ability toward SMX degradation via a Fenton-like approach. The excellent activity of the as-prepared FeOOH@BNG catalysts was ascribed to the enhanced textural properties and better exposure of active sites, thanks to the highly dispersive Fe sites on the BNG supports. The optimal catalyst, FeOOH-5@BNG, was further employed for the optimization of key reaction parameters such as catalyst loading, H2O2 dosage, pH, and reaction temperature. Moreover, electron paramagnetic resonance (EPR) and reactive species quenching tests were employed to reveal the responsive reactive oxygen species and the mechanism in the FeOOH@BNG/H2O2 system for SMX degradation. The current study not only opens new insights into the fabrication of amorphous but metallic nanomaterials but also leads to their potential application in environmental remediation.

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Section: Resultsmentioning

confidence: 94%

Amorphous FeOOH Anchored on Boron and Nitrogen Codoped Carbon Nanotubes for Fenton-like Oxidation of Sulfamethoxazole

Asif

Shi

et al. 2023

J. Phys. Chem. C

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“…20 In addition, the specific facet properties of iron-(oxyhydr)oxide, including surface potentials, and atomic and electronic structures, are reported to significantly impact the photochemical/adsorption activity of iron-(oxyhydr)oxide. [21][22][23][24] For example, hematite with exposed {001} and {120} facets exhibited a much higher photodegradation activity for personal care products than hematite with exposed {012} and {120} facets; 25 hematite with higher {012} facet exposure displayed better U(VI) adsorption capacity compared to hematite with dominant exposed {001} facets; 26 goethite with more {021} facets exhibited higher catalytic reactivity in persulfate activation and tetracycline degradation; 27 our recent study also found that the catalytic oxidation of Mn(II) and nucleation of Mn(II/III) oxides occur mainly on hematite {012} and {113} facets. 3 These studies have demonstrated that investigating these reactions at well-defined facets of iron-(oxyhydr)oxide can provide nano/atomic-level information, which should be helpful in exploring the underlying mechanisms of coupled photocatalytic and adsorption reactions of redox-sensitive elements at iron-(oxyhydr)oxide surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…30 Recent progress achieved in the facet-specific reactivity of hematite, including the photocatalytic degradation of organic pollutants, adsorption of heavy metal ions, and iron dissolution, has provided a good foundation for further investigating the reactions at the hematite-water interface. 25,26,31 Hematite with specifically studied facets, therefore, can be an ideal model for exploring the effect of the surface structure on the coupled photocatalytic and adsorption reactions of redox-sensitive contaminants on iron-(oxyhydr)oxide.…”

Section: Introductionmentioning

confidence: 99%

Facet-specific photoreduction and immobilization of Cr(vi) on hematite nanocrystals

Chen,

Xian,

Liu

et al. 2024

Environ. Sci.: Nano

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“…For example, the exposed crystal facets could significantly affect the ability of hematite to catalyze the hydrolysis of phosphate esters [29,30]. The exposed facets also influenced the photocatalytic or photo-Fenton degradation of pollutants by controlling the state of atomic arrangement on the hematite surface [31]. Therefore, it is extremely important to study the effect of exposed crystal facet of hematite nanoparticles on their adsorption of phosphate.…”

Section: Introductionmentioning

confidence: 99%

Facet-Dependent Adsorption of Phosphate on Hematite Nanoparticles: Role of Singly Coordinated Hydroxyl

Li,

Shi,

et al. 2023

Water

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Phosphorus is an essential nutrient for plant and animal growth, while excessive phosphorus discharges can cause eutrophication of water bodies, leading to deterioration of water quality and posing serious risks to biodiversity and human health. Hematite is abundant on the Earth’s surface and plays a key role in phosphorus cycle. In particular, hematite nanoparticles may adsorb organic or inorganic phosphorus, consequently affecting phosphorus fate and effects. Yet, how the intrinsic properties of hematite (e.g., crystal facet) affect its adsorption process of phosphorus remains unclear. Here, three hematite nanoparticles with different exposed crystal facets were controllably synthesized to investigate their adsorption of phosphate under different pH conditions. The results revealed that the efficiency of hematite for adsorbing the phosphate depends on the crystal facets of hematite in the order of {104} > {110} > {001}. The phosphate adsorption on the hematite surface involves inner-sphere complexation between the phosphate and surface hydroxyl groups of hematite. The facet-dependent adsorption affinity of phosphate to hematite is mainly determined by the content of singly coordinated hydroxyl groups of hematite. These findings are useful to evaluate the potential environmental risks of iron oxide nanoparticles as a medium to the biochemical cycle of P element.

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Morphology/facet-dependent photo-Fenton-like degradation of pharmaceuticals and personal care products over hematite nanocrystals

Cited by 23 publications

References 83 publications

Amorphous FeOOH Anchored on Boron and Nitrogen Codoped Carbon Nanotubes for Fenton-like Oxidation of Sulfamethoxazole

Amorphous FeOOH Anchored on Boron and Nitrogen Codoped Carbon Nanotubes for Fenton-like Oxidation of Sulfamethoxazole

Facet-specific photoreduction and immobilization of Cr(vi) on hematite nanocrystals

Facet-Dependent Adsorption of Phosphate on Hematite Nanoparticles: Role of Singly Coordinated Hydroxyl

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