Insight into photo-Fenton reaction mechanism on a magnetite-GO nanocomposite: Computational and experimental investigations

In situ use of photocatalytically produced H2O2 for Fenton degradation of organic pollutants

“…H 2 O 2 can also be produced through the conversion of •OH radicals generated from the oxidation of hydroxide anions (OH − ) by photogenerated holes (h + ) [eqn (10)]. 25 Eqn (11) shows that the photogenerated holes of a photocatalyst with a VB more positive than 2.38 V (NHE), have the adequate driving force to oxidize water (H 2 O) to •OH.…”

“…Furthermore, given the short lifetime of •OH, the organic substrate should also be nearby. 10 Generally, heterogeneous catalysts for Fenton processes have better recyclability than their conventional homogeneous counterparts because electron transfers between atoms neighbouring surface cations can sustain them for limited reuse. Contrary to these, heterogeneous photo-Fenton processes have a different mechanism.…”

“…Thus, in this case, the H 2 O 2 molecules should have a stronger affinity to the CB portion of the photocatalyst. 10 The photocatalyst's valence band (VB) then takes an electron from an organic fragment (or ·OOH or OH − ) to regenerate itself. In contrast to heterogeneous Fenton catalysts, photo-Fenton catalysts have separate reduction and oxidation centres corresponding to the VB and CB locations in the photocatalyst.…”

Ag‐based bimetallic clusters as catalysts for p‐nitrophenol reduction by glycerol: A DFT investigation

“…Table S1 in Supporting information also contains the interaction energies between PNP/glycerol and each type of metal cluster. To further understand the mechanism of these interactions we perform natural bond orbital (NBO) [34,35] analysis.…”

Fenton reaction by H2O2 produced on a magnetically recyclable Ag/CuWO4/NiFe2O4 photocatalyst

“…In contrast, an external magnetic field can quickly recover superparamagnetic nanoparticles from the treated aqueous solution. 15,16 Thus, magnetic photocatalysts can be economically recycled. A few recent reports in the literature have reported visible light magnetic photocatalysts for H 2 O 2 production.…”