A rationale for the rapid extraction of ultra-low-level uranyl ions in simulated bioassays regulated by Mn-dopants over magnetic nanoparticles

Abstract

MNP & Mn-MNP, with very high Kd value (∼3 × 106) & very low t1/2 (∼0.9 min) to be utilized for separation of ultra-low level uranyl ions from bioassays. Realizes uranyl ion interaction over diverse adsorption sites regulating MNP sorption behaviour.

Size-Dependent Magneto-Photocatalytic Properties of Mn-Doped Fe3O4 Nanoparticles Dispersed over the KIT-6 Matrix for the Photocatalytic Degradation of p-Chlorophenol

“…The initial peak of 529.8 eV is for O that is attached to Fe 3 O 4 , as has been confirmed earlier in the literature. 14 However, there is no alteration in the peak position (B E) of the other two peaks compared to KIT-6. This conveys a similar understanding as in the case of Si 2p peak of no electronic interaction between Fe 3 O 4 guests and that of the hosts KIT-6.…”

“…The major peaks for the Mn-doped Fe 3 O 4 were found at (2 2 0), (3 1 1) and (4 0 0), (5 1 1) and (4 4 0) in the range of 10−70°. 14 However, the diffraction peak (1 1 1) is not observed, as it is present in the same place as the broad amorphous peak of silica. Owing to showing the different intertwined mesoporous channel structure as has been observed earlier in the literature.…”

“…The XPS data for Fe 2p and Mn 2p in the MNP-100 sample (Figure S11) shows that in Mn-doped Fe 3 O 4 , Fe is present in Fe 3+ (712 eV)�Fe 2p 3/2 and Fe 2+ state (710 eV)�Fe 2p 3/2 state which is in conjunction with the earlier literature. 14 The Mn-doped Fe 3 O 4 has Mn 2p (641.9 eV), showing Mn to be present in the Mn 2+ state. Therefore, in MNP-100, Mn 2+ substitutes mostly the Fe 2+ sites (octahedral sites) for the Fe 3 O 4 inverse spinel structure, as has been shown earlier in the literature.…”

“…Nano Mn-doped Fe 3 O 4 was synthesized using a modified coprecipitation route. 14 Briefly, MnCl O were taken in a stoichiometric ratio of 1:4:13 (w/w) and dissolved in a mixture of 12 M HCl and distilled water (1:30, v/ v). The solution was stirred under N 2 for 20 min.…”

“…In the recent past, our group has worked on the magnetic materials Mndoped Fe 3 O 4 (where there is a distinct blue shift from the NIR region in the band gap), mainly utilized for their sorption property. 14 In order to utilize these materials for effective photocatalytic application, there is a need to further increase their band gap for better quantum efficiency of these materials.…”