Enhanced photo-degradation of pollutants in three dimensions by rGO/Bi12O15Cl6/InVO4: LED-light photocatalytic performance and mechanism investigation.

Novel Z-scheme rGO/Bi 12 O 15 Cl 6 /InVO 4 ternary heterojunction photocatalyst was successfully prepared using reduced graphene oxide (rGO) as the electronic medium. The optimum sample 0.3% rGO/Bi 12 O 15 Cl 6 /InVO 4 can degrade 99.1% Rhodamine B (RhB) and 77.48% tetracycline (TC) in 75 min, and can inactivate Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) within 30 min under the LED light. The crystal structure, morphology, composition, specific surface area, photoelectric chemical properties, and photodegradation properties were studied. Compared with binary Bi 12 O 15 Cl 6 /InVO 4 and single photocatalyst, rGO/Bi 12 O 15 Cl 6 /InVO 4 ternary heterojunction photocatalyst presented the best degradation and antibacterial performance, which is mainly due to the introduction of rGO, which can enhance the absorption of photons, and the separation and migration efficiency of photoexcited carriers. The capture experiment of active substances showed that both h+ and •O 2 − were the main active substances in the photocatalytic process. The probable photocatalytic degradation pathway of TC was proposed by mass spectrometry (MS) determination of the intermediate. The experimental results show that Z-scheme rGO/Bi 12 O 15 Cl 6 /InVO 4 is a promising photocatalyst. [ABSTRACT FROM AUTHOR]