Mechanism insight into the photocatalytic degradation of fluoroquinolone antibiotics by the ZIF-8@Bi₂MoO₆ heterojunction

Abstract

This work reports a comprehensive study on the mechanisms for material formation, charge separation, persulfate activation, and photocatalytic degradation of fluoroquinolone antibiotics (e.g., ofloxacin (OFX), levofloxacin (LFX), and ciprofloxacin (CFX))...

A novel CuAl2O4/MoS2/BaFe12O19 magnetic photocatalyst simultaneously coupling type I and Z-scheme heterojunctions for the sunlight-driven removal of tetracycline hydrochloride

“…[12][13][14] The key to the photocatalytic degradation of antibiotics is the selection of photocatalysts, especially the development of new photocatalysts that can degrade antibiotics under visible light conditions. [15][16][17][18][19][20][21][22][23][24] Copper aluminate (CuAl 2 O 4 , CAO) is a commonly used photocatalyst because of its high charge transfer and separation efficiency, high thermal and chemical stability, environmental friendliness and other advantages, and it is widely used to degrade dyes, antibiotics and other pollutants that are difficult to degrade naturally. [25][26][27][28] Interestingly, the combination of other excellent semiconductor materials with CAO can greatly enhance the electron and hole transfer and separation efficiency of a system, thus enhancing the photocatalytic activity of the system.…”

The performance and mechanism of persulfate activated by CuFe-LDHs for ofloxacin degradation in water

“…12 When the PS was activated, sulfate radicals (SO 4 • − ), a green oxidant with a higher redox potential (E 0 = 2.5-3.1 V), a larger range of operational pH, and better selectivity were generated, compared to traditional •OH. [13][14][15] However, external activation energy is generally required to activate SO 4 • − , such as heat, light, electricity, or microwaves, [16][17][18][19][20] leading to excessive energy consumption during the treatment process. It seems that the requirements for selecting more suitable alternative catalysts are becoming increasingly urgent.…”

Graphene oxide modulated dual S-scheme ultrathin heterojunctions with iron phthalocyanine and phase-mixed bismuth molybdate as wide visible-light catalysts

“…Regarding this, many strategies have been adopted during the past decade, including doping, 15 surface modification, 16 and constructing a heterojunction. 17,18 One of the most promising methods is to construct an S-scheme heterojunction with reduced semiconductors, which not only improves charge separation but also preserves the strong redox ability due to the negative conduction band of the reduced semiconductors. 19–21 Many Bi 2 MoO 6 -based S-scheme heterojunctions like CdS QDs/Bi 2 MoO 6 , 22 Bi 2 S 3 /OV-Bi 2 MoO 6 23 and Bi 2 Sn 2 O 7 /Bi 2 MoO 6 24 have been demonstrated to improve the photocatalytic activities.…”