Facet-dependent photo-degradation of nitro polycyclic aromatic hydrocarbons on hematite under visible light: Participation of environmentally persistent free radicals and reactive oxygen/nitrogen species

Unrecognized Role of Organic Acid in Natural Attenuation of Pollutants by Mackinawite (FeS): The Significance of Carbon-Center Free Radicals

“…The obtained FeS samples were characterized by X-ray diffraction (XRD, D8 Advance A25, Bruker, Germany), scanning electron microscopy (SEM, Regulus 8100, Hitachi, Japan), transmission electron microscopy (TEM, G2 60-300, FEI Titan, USA), Brunauer–Emmett–Teller nitrogen-adsorption method at 77 K (Micromeritics, ASAP 2460, USA), and laser particle analyzer (Malvern Mastersizer 2000) as described in Supporting Information Text S3, and the corresponding results were provided in Supporting Information Figures S1–S4. Fe 2 O 3 and MnO 2 were acquired by adopting a protocol as in our previous works. , Ultrapure water (18.2 MΩ·cm, Millipore) was used in all experiments.…”

Facet-Specific Photocatalytic Degradation of Extracellular Antibiotic Resistance Genes by Hematite Nanoparticles in Aquatic Environments

“…Its semiconductor nature equips it with the capability of photocatalytic degradation of organic contaminants. When illuminated, hematite can generate ROS, facilitating the breakdown of wastewater organic contaminants (e.g., polycyclic aromatic hydrocarbons) and the photoaging of polystyrene microplastics. , Intriguingly, previous literature suggests hematite’s prowess in diminishing pathogenic loads in water, either via direct interactions or through ROS-mediated inactivation . In this work, we have delved deeper into the unique properties of hematite nanoparticles, focusing particularly on their facet-specific behavior.…”

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

“…18,19 The morphology of iron-(oxyhydr)oxide varies with the geological conditions, resulting in further changes of its dominant exposed facets. 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.…”