Physicochemical and Photocatalytic Properties of Fe-Pillared Bentonite at Various Fe Content

Abstract

Iron-pillared bentonites (Fe/Bents) were successfully prepared using a ferric chloride precursor. The prepared samples were characterized using XRD, BET and SEM-EDX. The results show that the pillared bentonite physicochemical character is affected by the iron content in a precursor solution. By Fe content variation, it is found that Fe content in Fe/Bents is not linearly correlated with the specific surface area and the increased in d001 in which both the maximum specific surface are and d001 reach maximum at the Fe content of 20 mmol/g. Due to the kinetics of photocatalytic activity in phenol removal, it is concluded that in photo-Fenton-like processes.

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

“…Figure 9 presents the effect of the metal:clay ratio on the d 001 of pillared clays, indicating the optimum conditions. tonite identified by XRD and SEM analyses [123]. The shift in d001 reflection to lower angle indicated the enhanced interlayer space, from 14.9 nm in the bentonite sample (Bent) to 15.45 nm and 16.78 nm for Fe2O3-pillared bentonites with Fe contents of 5 mmol/10 g and 10 mmol/10 g (Fe/Bent-5 and Fe/Bent-10), respectively.…”

“…From the schematic representation of clay pillarization, the increasing basal spacing, d 001 , is an important earmark for the success of pillarization, which influences the surface morphology. Figure 7 shows the increasing d 001 features from Fe 2 O 3 -pillarization to bentonite identified by XRD and SEM analyses [ 123 ]. The shift in d 001 reflection to lower angle indicated the enhanced interlayer space, from 14.9 nm in the bentonite sample (Bent) to 15.45 nm and 16.78 nm for Fe 2 O 3 -pillared bentonites with Fe contents of 5 mmol/10 g and 10 mmol/10 g (Fe/Bent-5 and Fe/Bent-10), respectively.…”

“…From the Fe 2 O 3 /montmorillonite and SnO 2 /montmorillonite syntheses, it was revealed that the metal content in the pillaring precursor is an appreciable and crucial factor in determining the surface profile and the particle size of the dispersed metal oxide [ 123 , 125 ]. A higher amount of Sn in the pillaring precursor determined the increasing particle size, which was then correlated with the band gap energy.…”

Magnetic iron oxide/clay nanocomposites for adsorption and catalytic oxidation in water treatment applications

“…The Brunauer-Emmett-Teller approach calculated from the N 2 adsorption/desorption isotherm data is a generally acceptable method for this calculation. However, specific surface area and pore size distribution are not the most influential parameters for removal efficiency, as surface hydrophobicity and hydrophilicity also play roles in the interaction [27].…”

“…However, dispersion method, including pillarization, co-precipitation, and impregnation, is a more important factor than the iron content. The MNPs are distributed as metal oxide pillars in the pillarization method, while co-precipitation and impregnation position nanoparticles in the interlayer or at the edge of silica or alumina layers [27,88]. The cation exchange capacity and surface area of raw clay, as well as the layered structure, calcination temperature, and dispersion method, strongly influence the specific surface area of the composite.…”