An XPS study of the adsorption of lead on goethite (α-FeOOH)

Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes

“…The Fe 2p profile contains the characteristic 2p 3/2 and 2p 1/2 peaks centered at 711.5 eV and 725.2 eV, respectively. The energy corresponding to Fe 2p 3/2 is typical for iron in iron oxide [26] and in iron oxohydroxide [24]. FTIR spectra of GT-Fe NPs revealed several peaks in the spectral range 800-1800 cm −1 (Fig.…”

“…The O 1s profile contains two shoulders at 530.4 eV and 531.6 eV, in addition to 532.8 eV. These features can be attributed, respectively, to O in the iron oxide lattice [23], O in structural OH − [24], and O in physisorbed water [25]. The C 1s profile shows a duplet at 285.2 eV and 286.4 eV.…”

A new insight on the core–shell structure of zerovalent iron nanoparticles and its application for Pb(II) sequestration

“…nZVI reduced from borohydride is clad in a smooth amorphous oxide skin and FeOOH is considered as the main iron oxide phase of nZVI [5,6,16]. Besides functioning as a semiconductor for charge transport in the reduction process [17], the thin FeOOH layer provides the main bonding sites, hydroxyl groups, for heavy metal cations [18][19][20]. In other words, the quantity of surface hydroxyl groups determines the adsorption capacity of nZVI.…”

Spectral investigation of the Piperazine Dithiosemicarbazone Derivatives as inhibitor on High Carbon Steel in HCl media

“…The O 1s spectrum of the as shown in Fig 6., it comprises the overlapping of the number spectrum. Binding energy peak at 530.o eV related to the OH species, the second peak at 531.2 eV related to the O 2-species [36][37][38][39][40]. The S 2p spectrum seen in Fig 6., it shows a single peak with several overlapping spectrums.…”

“…The second peak at 286.0 eV corresponds to the C-N of the inhibitor [37]. The N 1s spectrum has contained the number of overlapping spectrum, it has the peak at 400.0 eV corresponds to the C-N species, 401.0 eV related to the Fe-N species which nitrogen atom of the inhibitor interaction with the Fe atom in the high carbon steel [35][36][37][38]. The O 1s spectrum of the as shown in Fig 6., it comprises the overlapping of the number spectrum.…”