A 2D/2D S-scheme photo-Fenton catalyst based on ultrathin Bi₂MoO₆ and Fe₂O₃ hexagonal nanosheets for efficient tetracycline degradation

Abstract

Fe2O3/Bi2MoO6 heterojunctions exhibit an observably improved photo-Fenton catalytic tetracycline degradation activity, which is accredited to an 2D/2D S-scheme charge transfer mechanism.

Engineering an oxygen-vacancy-mediated step-scheme charge carrier dynamic coupling WO3−X/ZnFe2O4 heterojunction for robust photo-Fenton-driven levofloxacin detoxification

“…The OH radical generated by Fe(III)/Fe(II) conversions in the photo-Fenton reactions significantly increased the LVX degradation efficiency. 53 Subsequently, the OH and O 2 À species are responsible for LVX degradation, which was consistent with the outcomes of the quenching experiment. In conclusion, the photo-Fenton process stimulated the reduction of Fe(III) and increased the concentration of Fe(II), which again oxidized and produced greater amounts of OH radicals.…”

Sunlight-Driven Photocatalytic Degradation of Ciprofloxacin by Carbon Dots Embedded in ZnO Nanostructures

“…Notably, compared to various conventional processes and advanced oxidation processes, “heterogeneous photocatalysis” , is considered to be a more viable option for degradation of antibiotics without the use of any exogenous supply of H 2 O 2 . This is a “green approach”, where semiconductor-type photocatalysts upon absorbing light of energy greater than its band gap can in situ generate a plethora of reactive oxygen species (ROS), for example, hydroxyl radicals, superoxide radicals, singlet oxygen, and H 2 O 2 . , It was noted in the literature that the nanocomposites (NCs) made of other metal oxide systems with carbonaceous materials, for example, N-doped carbon-coated mulberry-like cobalt manganese oxide (H-CoMnO x @NC) as a photo-Fenton-like catalyst, has shown excellent results for removal of seven different pharmaceutically active compounds . However, TiO 2 and ZnO nanoparticles (NPs) are most widely used photocatalysts owing to excellent photocatalytic performance, high chemical stability, and non-toxic nature. − They are both wide band gap materials, which necessitate the use of UV light for photoexcitation.…”

“…This is a "green approach", where semiconductor-type photocatalysts upon absorbing light of energy greater than its band gap can in situ generate a plethora of reactive oxygen species (ROS), for example, hydroxyl radicals, superoxide radicals, singlet oxygen, and H 2 O 2 . 9,10 It was noted in the literature that the nanocomposites (NCs) made of other metal oxide systems with carbonaceous materials, for example, N-doped carbon-coated mulberry-like cobalt manganese oxide (H-CoMnO x @NC) as a photo-Fenton-like catalyst, has shown excellent results for removal of seven different pharmaceutically active compounds. 11 and non-toxic nature.…”

Construction of a Bi2MoO6/CoOx/Au system with a dual-channel charge transfer path for enhanced tetracycline degradation

“…[6][7][8][9][10] Bismuth molybdate, which possesses a distinctive layered structure and suitable bandgap, has been reported as a promising two-dimensional (2D) photocatalyst for antibiotic degradation under visible light. [11][12][13][14] However, the photocatalytic properties of pristine BMO in practical application are not as good as what is expected. The key obstacles for this dilemma are the high recombination rate and low migration rate of photogenerated carriers on the surface of BMO.…”