Molecular engineering of polymeric carbon nitride for highly efficient photocatalytic oxytetracycline degradation and H2O2 production

Yang, Yang; Zeng, Guangming; Huang, Danlian; Zhang, Chen; He, Danping; Zhou, Chengyun; Wang, Wenjun; Xiong, Weiping; Li, Xiaopei; Li, Bisheng; Dong, Wanyue; Zhou, Yin

doi:10.1016/j.apcatb.2020.118970

Cited by 278 publications

(72 citation statements)

References 75 publications

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“…pH, temperature, salinity, light) (Choo, 1994;Brooks et al, 2008;Leal et al, 2016). The degradation rates of OTC in river sediment and wastewater sludge have been reported to be higher than TC (Chang & Ren, 2015;Yang et al, 2020).…”

Section: Tetracyclinesmentioning

confidence: 99%

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Thiang

Lee

Takada

et al. 2021

Ecosyst Health Sustain

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One major source of antibiotic contamination in the sea is from aquaculture. We monitored concentration of commonly used antibiotic classes and antibiotic resistance genes (ARGs: tet(M), sul1, sul2 and sul3) in seven main aquaculture production stations in Peninsular Malaysia and detected twenty-three antibiotics. Tetracyclines, sulfonamides and quinolones were the most frequently detected antibiotic classes, 2 indicating a wide distribution of antibiotics in Malaysian aquaculture farms.Oxytetracycline, tetracycline and minocycline were the common tetracyclines (LOQ-2.45× 10 2 ng/L) detected, while sulfamerazine and sulfathiazole were commonly detected sulfonamides (LOQ-2.82× 2 ng/L) among the farms. For quinolones (LOQ-9.58 × 10 5 ng/L), enrofloxacin, nalidixic acid, and ofloxacin were the most 31 common. Relative to Asian aquaculture farms, the residues detected here were at low 32 or moderate levels except for quinolones. The dendrogram and heatmap revealed 33 three groups of antibiotic concentration patterns but with no differences in the types of antibiotics usage among aquaculture farms were observed. The ARGs (10 -3 copies/16S) were detected in more than 90% of the sites except for sul3. There was also high ecological risks of ciprofloxacin, enrofloxacin, norfloxacin and lincomycin for cyanobacteria and algae in Kelantan, Perak and Pahang. This is the first study to shed light on the antibiotic contamination, ARGs in aquaculture systems and its potential ecological risk in the coasts of Malaysia. This study will be useful to develop effective management of aquaculture wastewater in order to mitigate antibiotic pollution and transmission of ARGs to humans through the food chain.

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Section: Tetracyclinesmentioning

confidence: 99%

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Thiang

Lee

Takada

et al. 2021

Ecosyst Health Sustain

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“… 16 , 17 16 , 17 In addition to this, molecular engineering strategies have also been developed for g-C 3 N 4 to extend the optical absorption ability and accelerate the charge transfer. 18 Among various developed methods, the construction of heterojunctions and addition of photosensitizers can improve the photogenerated charge carrier separation and increase the quantum efficiency. 15 In recent years, the heterojunction between NiFe 2 O 4 and g-C 3 N 4 has been widely studied in photocatalytic energy and environmental remediation fields due to its suitable band structure for effective separation of charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Conversion of a Type-II to a Z-Scheme Heterojunction by Intercalation of a 0D Electron Mediator between the Integrative NiFe₂O₄/g-C₃N₄ Composite Nanoparticles: Boosting the Radical Production for Photo-Fenton Degradation

2020

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A carbon dot (CD)-intercalated NiFe 2 O 4 (NFO)/graphitic carbon nitride (g-C 3 N 4 , g-CN) ternary Z-scheme heterojunction was synthesized by the facile wet chemical method and used for photo-Fenton degradation. The structural, optical, electrical, vibrational, and morphological properties of the photocatalysts were investigated through various analytical methods. The CD-intercalated heterojunction formation was analyzed by high-resolution transmission electron microscopy (HRTEM). The intercalated CD acted as an electron donor/acceptor, which converted a type-II heterojunction to a Z-scheme heterojunction. The formation of Z-scheme heterojunction was confirmed by the enormous production of radicals (hydroxyl (OH • ) and superoxide (O 2 – )) and the elemental trapping experiment. In particular, the heterojunction photocatalyst NFO/5g-CN/7.5CD showed the highest photo-Fenton degradation efficiency of 99% for rhodamine B (Rh B) and 93% for tetracycline (TCN) in the presence of H 2 O 2 . The charge separation and electron transport behaviors of the photocatalyst were examined by photoluminescence (PL) and photocurrent measurements. In the Z-scheme photo-Fenton system, hydroxyl and superoxide radicals played a vital role in the visible-light-driven degradation process. Hence, the prepared Z-scheme ternary photocatalyst is well suitable for wastewater treatment in practical use.

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“…From the perspective of environmental remediation, H 2 O 2 is a clean and versatile oxidant. [ 145 ] Watts et al evaluated and compared the toxicity of the typical free radicals (H 2 O 2 , ⋅O 2 − , and ⋅OH anions) to E. coli . [ 146 ] They found that the disinfection effects of H 2 O 2 alone are equal to the system that combines both ⋅OH and ⋅O 2 − .…”

Section: Ros‐induced Bacteria Inactivation Over 2d Semiconductorsmentioning

confidence: 99%

“…2‐hydroxy‐4,6‐dimethylpyrimidine was grafted onto the g‐C 3 N 4 framework to modulate the electric structure of the g‐C 3 N 4 sheets ( Figure a). [ 145 ] Benefiting from the relocation of highest occupied molecule orbital (HOMO) and lowest un‐occupied molecular orbital (LUMO) electrons, the modified g‐C 3 N 4 exhibited a rapid visible light‐driven H 2 O 2 formation via the two‐step oxygen reduction. The upshift of band positions has been observed in g‐C 3 N 4 that was copolymerized by melem and barbituric acid as well.…”

Section: Ros‐induced Bacteria Inactivation Over 2d Semiconductorsmentioning

confidence: 99%

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

Liu

Zeng

et al. 2020

Solar RRL

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Solar‐driven photocatalysis has been developing as a sustainable process and it holds appreciable promise to address the pollutants and risks posed by biohazards. The unique geometrical and electric features of 2D semiconductors have nurtured a variety of advanced photocatalytic bactericides where oxidative oxygen species are generated as the main disinfection reagents. Herein, the state‐of‐the‐art progress of solar‐driven photocatalytic disinfection based on 2D semiconductors with an emphasis on the generation and effects of various reactive oxygen species is summarized. Moreover, the immobility of the photocatalyst for practical applications is discussed. Finally, perspectives and challenges are presented to guide future research on photocatalytic disinfection.

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Molecular engineering of polymeric carbon nitride for highly efficient photocatalytic oxytetracycline degradation and H2O2 production

Cited by 278 publications

References 75 publications

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Conversion of a Type-II to a Z-Scheme Heterojunction by Intercalation of a 0D Electron Mediator between the Integrative NiFe₂O₄/g-C₃N₄ Composite Nanoparticles: Boosting the Radical Production for Photo-Fenton Degradation

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

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Molecular engineering of polymeric carbon nitride for highly efficient photocatalytic oxytetracycline degradation and H2O2 production

Cited by 278 publications

References 75 publications

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Antibiotic residues from aquaculture farms and their ecological risks in Southeast Asia: a case study from Malaysia

Conversion of a Type-II to a Z-Scheme Heterojunction by Intercalation of a 0D Electron Mediator between the Integrative NiFe2O4/g-C3N4 Composite Nanoparticles: Boosting the Radical Production for Photo-Fenton Degradation

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

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Conversion of a Type-II to a Z-Scheme Heterojunction by Intercalation of a 0D Electron Mediator between the Integrative NiFe₂O₄/g-C₃N₄ Composite Nanoparticles: Boosting the Radical Production for Photo-Fenton Degradation