Structural-controlled formation of nano-particle hematite and their removal performance for heavy metal ions: A review

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

“…The immobilization of Cr(VI) on hematite surfaces under light irradiation results from the combined effect of photocatalytic and adsorption reactions, and the important role of particular structures of the exposed facets should not be ignored. 3,50,51 Various facets of HNCs should possess the same reactivity (including photocatalytic and adsorption) when interacting with Cr(VI) under light irradiation, because all of the exposed facets of HNCs are equivalent, 33,52 thereby resulting in the relatively uniform distribution of Cr species on HNC surfaces. On the other hand, the facet-specific immobilization of Cr species on HNP surfaces could be ascribed to the difference in surface hydroxyl groups, electronic structure, and surface Environmental Science: Nano Paper potential between {113} and {001} facets.…”

Preparation of Two-Dimensional Fe3O4 Nanodisks and Nanosheets Transformed from α-Fe2O3 Analogues and Their Applications in Magnetic Field-Assisted Microalgal Harvesting Biorefinery Processes

“…Hematite and magnetite nanomaterials are a rapidly growing field of research because of their distinct physicochemical properties that arise from their reduced dimensions. , For example, these nanomaterials exhibit characteristic confinement effects, enhanced reactivity, and high surface area-to-volume ratios, leading to unique size-dependent magnetic behaviors, optical and electrical properties, and surface reactivity not observed in their bulk counterparts. , In particular, hematite and magnetite nanoparticles have been studied for a variety of scientific and technological applications, including magnetic data storage, sensing, and energy storage owing to their unique properties. In addition, they have been developed for catalysis, environmental remediation, and biomedical applications, such as water spitting, , CO 2 conversion to low-molecular-weight hydrocarbons, , removal of toxic heavy metal ions, , magnetically targeted drug-delivery platforms, magnetic resonance imaging contrast agents, , and tissue engineering scaffolds. , …”

“…Hematite and magnetite nanomaterials are a rapidly growing field of research because of their distinct physicochemical properties that arise from their reduced dimensions. 4,5 For example, these nanomaterials exhibit characteristic confinement effects, enhanced reactivity, and high surface area-tovolume ratios, leading to unique size-dependent magnetic behaviors, optical and electrical properties, and surface reactivity not observed in their bulk counterparts. 5,6 In particular, hematite and magnetite nanoparticles have been studied for a variety of scientific and technological applications, including magnetic data storage, 7 sensing, 8 and energy storage 9 owing to their unique properties.…”

Effects of Coexisting Anions on the Formation of Hematite Nanoparticles in a Hydrothermal Process with Urea Hydrolysis and the Congo Red Dye Adsorption Properties

“…As an application of α-Fe 2 O 3 nanoparticles, removal of harmful pollutants from wastewaters by adsorption has been conducted using α-Fe 2 O 3 nanoparticles as adsorbents [34,35]. For example, large amounts of wastewaters containing toxic organic dyes, which can have a serious impact on aquatic flora and fauna as well as human beings, have been generated in various dye industries such as dye manufacturing, textile dyeing, and printing, and discharged after proper treatments.…”