Mesoporous 2‐Line Ferrihydrite by a Solution‐Phase Cooperative Assembly Process for Removal of Organic Contaminants in Air

Microemulsion‐Assisted Preparation of a Mesoporous Ferrihydrite/SiO2 Composite for the Efficient Removal of Formaldehyde from Air

“…[28][29][30][31][32][33] Recently, Mathew et al reported a template-assisted solution-phase synthesis of mesoporous ferrihydrite and Mn-doped ferrihydrite, which conveyed excellent performance in removing CH 3 CHO and toluene contaminants from air. [34,35] The partial surface structure of the reported mesoporous ferrihydrite tended to become dehydroxylated during calcination at 300 8C. The calcination process can eliminate the structural water of ferrihydrite and increase its structural stability during phase transformations.…”

“…[27,28] Owing to its natural abundance, large surface area, high adsorption affinity, and environmental friendliness, ferrihydrite has been the focus of a vast number of studies on its use in nature, industrial applications, and in wastewater/drinking water treatment. [34,35] The partial surface structure of the reported mesoporous ferrihydrite tended to become dehydroxylated during calcination at 300 8C. [34,35] The partial surface structure of the reported mesoporous ferrihydrite tended to become dehydroxylated during calcination at 300 8C.…”

Mesoporous Ferrihydrite‐Based Iron Oxide Nanoparticles as Highly Promising Materials for Ozone Removal

“…On the basis of the previously proposed calculation model of Fh,10 we have examined the interaction between O 3 and Fh(110) surface by density functional calculations (DFT) to gain a fundamental understanding of the adsorption behavior of O 3 on Fh nanoparticles. The moieties of the most stable structure that resulted after O 3 adsorption on tri‐ and tetracoordinated Fe sites on the Fh(110) surface are shown in Figure 4 a, b.…”

Mesoporous Ferrihydrite‐Based Iron Oxide Nanoparticles as Highly Promising Materials for Ozone Removal

“…Herein, we report for the first time that the two‐line ferrihydrite (2LFh) with accessible mesopores can be used as a potential candidate for O 3 removal. The following aspects prompted us to consider mesoporous 2LFh (M2LFh) a judicial choice for O 3 removal: 1) it possesses high surface area and, being in the ferrihydrite (Fh) phase, a much higher percentage of iron sites are at or near the surface than in the bulk;7–9 2) with accessible mesopores, Fh nanoparticles have the potential for high adsorption owing to an increased rate of mass transfer to the reactive iron sites, such as we recently reported for their high efficiency in rapidly removing organic contaminants in the air;10 and 3) as an oxyhydroxide of iron, Fh is environmentally friendly and can be applied in various sectors. We also show herein that the presence of Fh nanoparticles in disordered mesostructured iron oxide has a significant effect on the bulk and surface structure of the material and on the activity.…”

“…M2LFh was prepared according to a reported procedure10 by assembly of Fh nanoparticles in 1‐propanol in the presence of polyoxyethylene (20) cetyl ether template. Additionally, a mesostructured semicrystalline iron oxide composed of amorphous Fh nanoparticles and crystalline γ‐Fe 2 O 3 phase (MSIO) and a crystalline iron oxide with no well‐defined mesopores (CIO) were prepared for comparison.…”