Hydroxylamine enables rapid heterogeneous-homogeneous coupled Fenton sulfamethazine degradation on ferric phosphate

Plasma Ag-Modified α-Fe2O3/g-C3N4 Self-Assembled S-Scheme Heterojunctions with Enhanced Photothermal-Photocatalytic-Fenton Performances

“…The photocatalytic-Fenton coupling system increases the number of active radicals effectively, and the internal energy generated by the photothermal effect can be activated to promote the dissociation of water molecules and accelerate the chemical reaction kinetics. The synergistic effect of S-Scheme heterojunctions, photothermal and photocatalytic-Fenton enabled the Ag/α-Fe 2 O 3 /g-C 3 N 4 ternary heterojunction to exhibit satisfactory photocatalytic performance [ 23 , 24 , 25 ].…”

“…The pure g-C 3 N 4 can only rely on its own photo-excited holes and oxygen-generated radicals generated by photogenerated electrons combined with oxygen to achieve the degradation of pollutants, which is not effective in the degradation of persistent organic pollutants [ 16 , 17 , 18 , 19 , 20 ]. The non-homogeneous Fenton reaction shows a high capacity for the removal of hard-to-degrade organic pollutants, and the photocatalytic-coupled Fenton system is one of the most promising approaches to address water pollution [ 21 , 22 , 23 , 24 , 25 ]. As a typical Fenton catalyst, α-Fe 2 O 3 has been widely used in photocatalysis because of its suitable band gap, cost-effectiveness, and thermodynamic stability.…”

An innovative S-scheme PhC2Cu/Ag/Ag2MoO4 photocatalyst for efficient degradation of sulfamethazine antibiotics: heterojunctions and innergenerated-H2O2 promote radical production

“…Typically, the ˙OH of the PAM40 system were derived from the reactions of holes in the VB (eqn (11)) and decomposition of H 2 O 2 (eqn (10)). To further investigate the reason behind the increased ˙OH in the PAM40 system, the yields of H 2 O 2 from the PhC 2 Cu, AMO, and PAM40 were tested.…”

“…Subsequently, the O 2 ˙− reacted with h + to generate H 2 O 2 (eqn (9)), which could further react with electrons to produce ˙OH (eqn (10)). The generated holes that accumulated on the VB of AMO (with a potential of 3.08 V vs. NHE) reacted with water molecules or HO − to form ˙OH, as shown in eqn (11). Ultimately, the pollutant molecules were attacked by h + , O 2 ˙−, and ˙OH, which resulted in the decomposition and mineralization of the SMT (eqn ( 6)-( 12)).…”

“…Recently, advanced oxidation processes (AOPs) have been employed for the degradation of SMT, including photocatalysis, photocatalytic fuel cell, 10 Fenton and Fenton-like processes, 11 electrocatalysis, 12 gamma irradiation, 7 and ozonation. 13 Photocatalysis is an emerging advanced oxidation process that has shown tremendous potential for the eradication of anthropogenic pollutants due to its high degradation activities, moderate reaction conditions, and use of renewable solar energy.…”