Synthesis of novel α-Fe2O3-Bi2S3-Gr for efficient photocatalytic degradation of environmental pollutants under visible-LED light irradiation

Abstract

nanorods was successfully synthesized via a hydrothermal route with incorporation of graphene obtained from the pyrolysis of alginate, and was employed as a catalyst of the degradation of benzotriazole (BTA) in a photo-Fenton process. Due to the unique combination of graphene and the binary α-Fe 2 O 3 -Bi 2 S 3 nanorod, the sample with 3 wt% graphene loading shows a high catalytic activity of 98% of BTA conversion under LED-visible light. The quenched free radicals are detected with an Electron Spin Resonance (ESR) technique, and the results indicate that hydroxyl radical • OH contributed to the BTA degradation reaction. A mechanism is proposed. Furthermore, the reusability of the catalyst was examined and the catalyst showed high activity over four cyclic runs.

Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles

“…However, its photocatalytic application has been limited mainly due to the significant charge carrier recombination rate and photo corrosion. Several anti-photo corrosion strategies include ion imprinted polymer [15], element doped [16], cocatalyst coupling [17], and tandem heterojunction structures [18] have been reported to be efficient for the abovementioned goal. Recently, boosting the photocatalytic performance of Bi 2 S 3 through combining it with other semiconductors such as BiOCl/Cu [19], MoS 2 /BiVO 4 [20], AgIO 4 [21], Ag 6 Si 2 O 7 [22], and so on have been reported.…”