Activation of Na₂S₂O₈ by α-Fe₂O₃/CuS composite oxides for the degradation of Orange II under visible light irradiation

Abstract

Layered α-Fe2O3/CuS nanoflowers with abundant active sites were synthesized by a hydrothermal method. The heterogeneous composite catalyst of α-Fe2O3/CuS nanoflowers exhibited remarkable degradation capacity of 97.8% within 25 min for...

Photocatalytic degradation of different types of microplastics by TiOx/ZnO tetrapod photocatalysts

“…We investigated the effect of H 2 O 2 and Na 2 S 2 O 8 , as it is known that the addition of electron scavengers such as hydrogen peroxide and sodium persulfate can enhance photocatalytic activity by preventing recombination of photogenerated charge carriers [ 56 ]. In addition, Na 2 S 2 O 8 can generate longer lived sulfate radicals [ 57 ]. We can observe that H 2 O 2 has negligible effect on photocatalytic degradation of both MPs, while increased degradation can be observed with the addition of Na 2 S 2 O 8.…”

“…For the photocatalytic degradation experiments, initial quantity of MPs (5 or 10 mg, as specified) was added into the solution. 400 mg of Na 2 S 2 O 8 was added as electron scavenger [ 56 , 57 ], unless specified otherwise. The mixture was stirred using a magnetic stirrer in the darkness to achieve equilibrium and was then placed under a 365 nm UV light (B-100 AP, UVP, 40 mW/cm 2 or PLS-LED100C, PerfectLight, 480 mW/cm 2 ; the effect of illumination power on the degradation is small, as illustrated in Fig.…”