Structural study of bentonite/iron oxide composites

Influence of heat treatment on phase transformation of clay–iron oxide composite

“…The ratio of relative intensities of the subspectra is: I A :I B = 0.6. The RT Mössbauer parameters obtained from the fitting, Table 1, showed only an existence of maghemite in the sample, as was published in [31]. In spite of the presence of inert atmosphere in the process of the composite synthesis (Section 2.1), the present Fe 2+ was completely oxidized during the composite drying.…”

Microwave-assisted synthesis, characterization and antibacterial activity of Ag/ZnO nanoparticles supported bentonite clay

“…The interlayer between units contains positive cations and water molecules. Due to this crystalline arrangement, smectites are able to expand and contract the interlayer while maintaining two dimensional crystallographic integrity [18][19][20][21][22][23]. Much effort is expended in discovering new methods of using clays in their native and modified forms.…”

Kinetic Performance of Aluminum and Iron Oxides in the Removal of Arsenate from Aqueous Environment

“…The increases in total pore volume of modified samples are probably due to the higher content of iron or aluminum in the composite. This could be explained by the formation of secondary pore structure during the precipitation of the metal oxide particles [8]. But the formation of small pores had no significant effect to the total pore volume due to the zero values of micropore volume for modified zeolites.…”