Fe3S4/Fe7S8-promoted degradation of phenol via heterogeneous, catalytic H2O2 scission mediated by S-modified surface Fe2+ species

In Situ Anchoring of Pyrrhotite on Graphitic Carbon Nitride Nanosheet for Efficient Immobilization of Uranium

“…As for Fe 7 S 8 /CNNS-1-U,t he peak positiona nd percentage of Fe 2 + and Fe 3 + changed (710.72, 724.85, 712.90, and7 26.34 eV shifted to 711.02, 724.85, 712.99, and 726.89 eV;7 6% and 17 %c hanged to 62 %a nd 28 %). [35][36] Based on the above results, we can conclude that the Fe 7 S 8 played ak ey role in the reduction of U VI . [37] The main immobilization mechanism is the adsorption of N-containingand S-containing functional groups and the reduction of iron sulfide, as shown in Scheme2.…”

“…[16b, 34] In Figure 12 d, the high-resolution XPS spectra of the S2p region forF e 7 S 8 /CNNS-1 could be divided into two peaks centered at 163.28 and 164.47 eV,a ttributed to S 2 2À and S n 2À ,r espectively.I nterestingly,t he S2ps pectrum for Fe 7 S 8 /CNNS-1-U not only exhibited negative shifts for disulfide S 2 2À and polysulfide S n 2À ,b ut an ew peak at 168.48 eV appeared belonging to sulfate SO 4 2À ,w hich implied thatt he Ss pecies was oxidized during the adsorption process. [23][24]35] The complex Fe 2p spectrum could be deconvolutedi nto Fe 2p 3/2 (centered at 711.08 eV) and Fe 2p 1/2 (centered at 724.48 eV). From Figure12e,i tc ould be seen that the peaks at 710.72 and 724.85eVb elongedt ot he characteristicp eak of Fe 2 + ,whereas the peaks at 712.90 and 726.34 eV were ascribed to Fe 3 + for the Fe 7 S 8 /CNNS-1 composite.…”

In Situ Derivatization for Boosted Lithium Storage Performance of Fe7S8/C Hollow Nanospheres

“…The other two peaks at 710.74 and 724.25 eV corresponding to the Fe 3 + species. [30,31] Figure 8(d) shows S 2p spectra of the Fe 7 S 8 /C HNSs. The peaks at 160.78, 163.21 and 164.48 eV indicate the presence of S 2À , and the other peak at 168.03 eV is assigned to SO 3 2À , which may result from the oxidation of S 2À in air.…”

Construction of flower-like MoS2/Fe3O4/rGO composite with enhanced photo-Fenton like catalyst performance

“…Advanced oxidation processes (AOPs) are considered promising technologies for achieving environmental remediation. [5][6][7][8][9][10] Among different AOPs, Fenton oxidation technology has received much attention because of its simple technological requirements, cheap catalysts and effective removal of environmental pollutants. 11,12 However, the traditional homogenous Fenton process has the problems of secondary treatment, catalyst loss in effluent, and low pH (pH < 3.0) requirements, which greatly restrict its practical applications.…”