Table 2.
UV-VIS, XPS and XRD of iron sulfide.
| Phase | UV-Vis peak (nm) | XPS | XRD | References |
|---|---|---|---|---|
| FeS | 500 285 A broad absorption in (400–700 nm) | Fe 2p 2p3/2 (711.4 eV) 2p1/2 (724.9 eV)S 2p 2p3/2 (161.1 eV) 2p1/2 (166.0 eV) | JCPDS card No.15-0037 JCPDS card No.75-0602 | Guo et al., 2016; Jin et al., 2017; Ahuja et al., 2019; Agnihotri et al., 2020 |
| FeS2 | Fe 2p 2p3/2 (707.0 eV) 2p1/2 (720.0 eV)S 2p 2p3/2 (162.3 eV) 2p1/2 (163.5 eV) | JCPDS card No.03-065-1211 JCPDS card No.89-3057 JCPDS card No.65-3321 JCPDS card No.42-1340 | Kar and Chaudhuri, 2004; Wadia et al., 2009; Li M. et al., 2011; Gan et al., 2016 | |
| Fe3S4 | Fe 2p 2p3/2 (711.0 eV)S 2p 2p3/2 (161.0 eV) 2p1/2 (162.5 eV) | JCPDS card No.16-0713 JCPDS card No.89-1998 JCPDS card No.16-0073 | Ma et al., 2010; Chang et al., 2011; Paolella et al., 2011; Beal et al., 2012; Feng et al., 2013; He et al., 2013; Ding et al., 2016; Moore et al., 2019 | |
| Fe7S8 | Fe 2p 2p3/2 (709.9 eV) (711.6 eV)S 2p 2p3/2 (163.5 eV) 2p1/2 (164.7 eV) | JCPDS card No. 25-0411 JCPDS card No.76-2308 JCPDS card No.71-0647 | Kong et al., 2005; Vanitha and O'Brien, 2008; Wang et al., 2013; Yao et al., 2013; Jin et al., 2019 |