Preparation of natural pyrite nanoparticles by high energy planetary ball milling as a nanocatalyst for heterogeneous Fenton process

Heterogeneous sono-Fenton-like process using nanostructured pyrite prepared by Ar glow discharge plasma for treatment of a textile dye

“…3 In both curves, the peaks of the Fe-S stretching vibration mode (540, 615.2, and 781.1 cm À1 ), the Fe-O-OH vibration (1020.3 cm À1 ), the Fe-SO 4 vibration (1623.9 cm À1 ), and the O-H vibration (3450.5 cm À1 ) were found [23,24]. The peaks at 2924 and 2853 cm À1 are related to the asymmetric and symmetric C-H bonds, respectively [25].…”

On structure and methylene blue degradation activity of an Aurivillius-type photocatalyst of Bi4V2O11 nanoparticles

“…Semiconductors with photocatalytic activities driven by UV-vis light have been widely investigated [1][2][3][4][5][6][7][8][9][10]. Optical absorption energy is decided by band gap, which is followed by the release of holes and electrons from valence (VB) and conduction (CB) bands, respectively.…”

Heterogeneous Fenton process by natural pyrite for removal of a textile dye from water: Effect of parameters and intermediate identification

“…A peak at 1020.3 cm −1 is due to Fe-O vibrations. A peak at 1623.9 cm −1 is ascribed to the Fe-SO 4 stretching vibrations [14]. This can be attributed to the oxidation of some S 2− anions on the surface of pyrite by atmospheric oxygen molecules.…”

“…2 shows FT-IR spectrum of the natural pyrite in the range 400−4000 cm −1 . It shows absorption bands of 540, 615.5 and 781.1 cm −1 attributed to Fe-S vibrations [14]. A peak at 1020.3 cm −1 is due to Fe-O vibrations.…”

“…This can be attributed to the oxidation of some S 2− anions on the surface of pyrite by atmospheric oxygen molecules. A broad band at 3450.5 cm −1 is assigned to O-H stretching vibration [14,15] this catalyst and accordingly availability of more superficial iron to catalyze the heterogeneous Fenton process. …”