Iron pyrite: Phase and shape control by facile hot injection method

Iron Pyrite Nanocrystals: A Potential Catalyst for Selective Transfer Hydrogenation of Functionalized Nitroarenes

“…The XRD pattern (Figure d) shows the phase transformation from a mixture of FeS and FeS 2 to pure FeS 2 as the amount of ODA is increased. Under these synthetic conditions, we did not observe formation of the Fe 3 S 4 phase as described by the Park group; however, the Park group used FeCl 3 as the iron precursor and a greater amount of ODA . In our case, the prevalence of the FeS phase decreased with an increasing amount of ODA suggesting that FeS is an intermediate phase en route to FeS 2 .…”

“…Under these synthetic conditions, we did not observe formation of the Fe 3 S 4 phase as described by the Park group; however, the Park group used FeCl 3 as the iron precursor and a greater amount of ODA. 47 In our case, the prevalence of the FeS phase decreased with an increasing amount of ODA suggesting that FeS is an intermediate phase en route to FeS 2 . We hypothesize that increasing the amount of ODA from 1.85 to 7.42 mmol allows for the production of sufficient quantities of H 2 S gas necessary for the formation of phase pure FeS 2 .…”

“…The binding energy peaks of Fe 2p 2/3 at 707.4 eV and Fe 2p 1/2 at 720.1 eV can be assigned to the Fe 2+ ion of iron pyrite, as reported in the literature. 41,43,47,54,55 A broad peak observed at a binding energy of 162.3 eV was attributed to the disulfide (S 2 2− ) of the pyrite phase. 56 Two peaks are typically observed at S 2p 2/3 (162.4 eV) and S 2p 1/2 (163.5 eV) for the disulfide (S 2 2− ) of FeS 2 but were not deconvoluted into separate peaks here.…”

Nanocrystalline Pyrite for Photovoltaic Applications

“…Pure FeS 2 nanocrystals (mean size: cubic (80 nm) and spherical (30 nm)) were synthesised using tri‐octylamine (TOA) and OLA as the solvents. The cube and spherical FeS 2 nanocrystals exhibited indirect bandgap of 0.95 eV & 1.0 eV and direct band gap of 1.5 eV & 3.2 eV respectively …”

Recent advances in eco-friendly and cost-effective materials towards sustainable dye-sensitized solar cells

“…10b). To completely avoid the use of CRMs, Park and co-workers focused on the synthesis of crystalline pyrite (i.e., FeS) nanoparticles via hot-injection moulding, 335 which required a moderate operating temperature of about 200°C. 336 FeS nanoparticles were then spin-coated onto FTO glass and used as CEs, giving slightly lower PCEs compared to that of the platinum-based CEs (Table 4, entries 10 and 11).…”