Enhanced oxidation of fluoroquinolones by visible light-induced peroxydisulfate: The significance of excited triplet state species

Wang, Afang; Zhou, Peng; Tian, Dongqi; Zhang, Heng; Xiong, Zhengwei; Du, Ye; He, Chuan-Shu; Yuan, Yue; Chen, Tingting; Liu, Yang; Lai, Bo

doi:10.1016/j.apcatb.2022.121631

Cited by 68 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A weak signal for [CrO(ehba) 2 ] − was detected in TC + Cr(VI) without the MOF@COF-2 photocatalyst (Figure c). Previous studies have reported that under visible light irradiation, TC can be excited into triplet states (3TC*) due to its photosensitivity, which can further transfer electrons toward Cr(VI) to form trace amounts of Cr(V). − A moderate enhancement of the signal intensity (0.077 a.u.) was obtained in the Cr(VI) + MOF@COF-2 system (Figure d), which was attributed to the photo-e – generated by MOF@COF-2 under visible light excitation and further utilized by Cr(VI) reduction.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Generation and Effective Utilization of Cr(V) for Simultaneous Removal of Coexisting Pollutants via MOF@COF Photocatalysts

Qi,

Zhou,

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

Simultaneous removal of coexisting aqueous pollutants is urgently needed in the face of higher demands for wastewater purification. Using pollutant intermediates with strong oxidizing ability to degrade other coexisting pollutants is a novel, energy-saving, and environmentally friendly way. Increased generation and effective utilization of these intermediates are vital to boost the decontamination performance. Here, we fabricated a core−shell MOF@COF (MIL-125@PC−COF) heterojunction photocatalyst for the synergistic removal of Cr(VI) and the coexisting organic pollutant tetracycline (TC). The removal efficiency of TC and Cr(VI) in the coexistence system was increased by 2.1-and 1.1-fold compared to that in single-pollutant system, respectively. The unique heterojunction structure in the composite photocatalysts can hinder the recombination of photogenerated electrons and holes, thus promoting the production of Cr(V) from Cr(VI) reduction. Quenching tests, in situ variable-temperature electron paramagnetic resonance (EPR) analysis, and UV−vis absorbance verified the effective utilization of Cr(V) and its positive contribution to TC degradation. The mechanism of Cr(V) generation and utilization and its key role in dual-pollutant removal were clarified.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhanced Generation and Effective Utilization of Cr(V) for Simultaneous Removal of Coexisting Pollutants via MOF@COF Photocatalysts

Qi,

Zhou,

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…Generally, triplet state organics are unstable and could convert to the ground state via transferring energy to other substances, which comes with fluorescence emission. 56,57 Therefore, fluorescence emission spectra were recorded with excitation wavelength at 254 nm to prove the generation of triplet state organics. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Multiple roles of humic acid in the photolysis of sulfamethoxazole: kinetics and mechanism

Chen,

Song,

Yang

et al. 2023

Environ. Sci.: Water Res. Technol.

View full text Add to dashboard Cite

show abstract

“…Pathogenic microorganisms are the source of waterborne diseases, prompting us to explore new green and efficient water disinfection technologies to solve the increasingly serious water resource problems. − The photocatalytic-activated persulfate (PS) advanced oxidation process has attracted extensive attention due to its low energy consumption, strong oxidation, and high mineralization characteristics in water purification. − However, most of the photocatalysts currently developed for the visible light PS activation are based on precious metal materials such as platinum and silver, which are expensive and potentially toxic to the environment. − As an emerging photocatalyst, bismuth-based material has shown excellent photocatalytic activation of the PS ability through variation in valence, proven in many studies. − Bismuth-based photocatalytic materials with high stability and environmental friendliness have great potential in advanced oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Bismuth Oxide Assemblages for Use in Persulfate Activation via the Bi–O–O Bridge: Reactivity, Kinetics, and Bactericidal Mechanism

Zhang

Tang

et al. 2023

ACS EST Eng.

View full text Add to dashboard Cite

Revealing the electron transport mechanism in the persulfate activation process is essential for the design of efficient catalysts. Herein, a series of catalysts with amorphous oxide layers of different thicknesses were synthesized and the results showed that the heterogeneity of metallic Bi and surface amorphous bismuth oxide layer improves the photogenerated carrier separation efficiency. More importantly, the Bi–O–O electronic bridge (BiVO(−1)O(−1)SO3 –) established by adsorption of persulfate (PS) on the surface amorphous oxide layer is the key step in facilitating the activation: acting as a fast electron transfer channel to facilitate the formation of PS-activated generation of reactive oxygen species (SO4 ·–, ·OH, ·O2 –, and 1O2) as well as enabling BiIII/BiV redox cycling. The treatment achieved 100% disinfection performance within 60 min by the cell membrane damage and internal antioxidant system destruction. This study reveals the interfacial activation and disinfection mechanism of heterogeneous bismuth oxide assemblages and provides a candidate disinfection strategy.

show abstract

Enhanced oxidation of fluoroquinolones by visible light-induced peroxydisulfate: The significance of excited triplet state species

Cited by 68 publications

References 46 publications

Enhanced Generation and Effective Utilization of Cr(V) for Simultaneous Removal of Coexisting Pollutants via MOF@COF Photocatalysts

Enhanced Generation and Effective Utilization of Cr(V) for Simultaneous Removal of Coexisting Pollutants via MOF@COF Photocatalysts

Multiple roles of humic acid in the photolysis of sulfamethoxazole: kinetics and mechanism

Heterogeneous Bismuth Oxide Assemblages for Use in Persulfate Activation via the Bi–O–O Bridge: Reactivity, Kinetics, and Bactericidal Mechanism

Contact Info

Product

Resources

About