A dual-oxidant advanced oxidation process system containing CaO2 and peroxymonosulfate for organic pollutant degradation: High adaptability and synergistic effect

Hou, Zhiran; Wang, Wei; Dong, Ningning; Chen, Pei; Ge, Lifa; Tan, Fatang; Wang, Xinyun; Qiao, Xueliang; Wong, Po Keung

doi:10.1016/j.seppur.2022.122909

Cited by 18 publications

(2 citation statements)

References 61 publications

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“…dying in the presence of TEMPO, which was formed during the oxidation of TEMP by 1 O 2 , proving that 1 O 2 was formed in the V O -TiO 2 /V C -g-C 3 N 4 system. [48] To study the source of • OH, triethanolamine and benzoquinone were added to the test system, and the contributions of holes (h + ) and electrons (e À ) to the formation of • OH were investigated. When triethanolamine was used as the hole-scavenging agent in the…”

Section: Resultsmentioning

confidence: 99%

Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Bi,

Du,

et al. 2024

ChemistrySelect

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Defect engineering is a proven strategy for enhancing the performance of photocatalysts. Herein, we present a new method for preparing heterojunction photocatalytic materials, VO‐TiO2/VC‐g‐C3N4, with enhanced activity. The presence of defect sites and a heterojunction structure in the catalyst gives rise to exceptional charge separation efficiency and light absorption capabilities. The synergistic effect of the heterojunction interface and activated defect sites, which act as active sites, significantly enhanced the overall photocatalytic performance of VO‐TiO2/VC‐g‐C3N4. The catalyst VO‐TiO2/VC‐g‐C3N4 exhibits superior photocatalytic activity in the NO degradation reaction: displaying 3.5‐ and 2.2 times higher degradation efficiency than VO‐TiO2 and VC‐g‐C3N4, respectively. Moreover, the nitrogen fixation performance of VO‐TiO2/VC‐g‐C3N4 is 3.8‐ and 3.1 times higher than that of VO‐TiO2 and VC‐g‐C3N4, respectively. Electron paramagnetic resonance (EPR) spectroscopy capture experiments revealed that 1O2 and ⋅ OH are the primary active species in the photocatalytic reaction. The collaboration of carbon vacancy defects, oxygen vacancy defects, and the heterojunction structure created additional active sites for VO‐TiO2/VC‐g‐C3N4. The insights gained from this study offer valuable guidance for the efficient design and synthesis of VO‐TiO2/VC‐g‐C3N4 heterojunction photocatalysts, and lay a solid foundation for further research and development of such systems for large‐scale environmental remediation.

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Section: Resultsmentioning

confidence: 99%

Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Bi,

Du,

et al. 2024

ChemistrySelect

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“…Recently, advanced oxidation processes (AOPs) [ 9 , 10 , 11 , 12 ], particularly peroxymonosulfate (PMS) and peroxydisulfate (PDS)-based AOPs [ 13 , 14 , 15 ], have become one of the research hotspots in getting rid of refractory antibiotics due to their virtues like fast reaction rate, high degradation efficiency, no secondary contaminant and wide applicable pH range [ 16 , 17 , 18 ]. So far, a great deal of techniques, including heat [ 19 ], ultraviolet light [ 20 ], ultrasound [ 21 ], transition metal [ 22 ] and carbonaceous material [ 23 , 24 ], have been applied to activate PMS/PDS to produce strong oxidizing reactive oxygen species (ROS) for antibiotic degradation.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Carbonyl Groups and Surface Defects in Carbon Nanotubes to Activate Peroxydisulfate for Tetracycline Degradation

et al. 2023

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Carbon nanotubes (CNTs) were considered a promising activator for persulfates due to their high electrical conductivity, large specific surface area and low toxicity. The functional groups and surface defects of CNTs could significantly affect their activation performance. In this study, CNTs with high C=O ratio and defect density (CNT-O-H) were prepared through a facile treatment of raw CNTs with HNO3 oxidation followed by calcination at 800 °C under an argon atmosphere. X-ray photoelectron spectroscopy (XPS) and Raman results showed that the C=O proportion and defect degree (ID/IG) rose to 75% and 1.53, respectively. The obtained CNT-O-H possessed a superior performance towards peroxydisulfate (PDS) activation, and the degradation efficiency of tetracycline (TC) in the CNT-O-H/PDS system was increased to 75.2% from 56.2% of the raw CNTs/PDS system within 40 min. Moreover, the activity of CNT-O-H after use could be easily recovered with re-calcination. In addition, the CNT-O-H/PDS system exhibited high adaptabilities towards wide solution pH (2–10), common coexisting substances and diverse organic pollutants. Singlet oxygen (1O2) was confirmed to be the dominant reactive oxygen species (ROS) generated in the CNT-O-H/PDS system. It was inferred that surface C=O groups and defects of CNTs were the key site to activate PDS for TC degradation.

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Decoration of Monodisperse Silver Vanadate on Biomass‐Derived Porous Carbon: A Dual‐Purpose Catalyst for Detection of p‐Nitrophenol and Photodegradation of Rhodamine B

Wei

Yang

Guo

et al. 2023

Adv Energy and Sustain Res

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A dual-oxidant advanced oxidation process system containing CaO2 and peroxymonosulfate for organic pollutant degradation: High adaptability and synergistic effect

Cited by 18 publications

References 61 publications

Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Improvement of Carbonyl Groups and Surface Defects in Carbon Nanotubes to Activate Peroxydisulfate for Tetracycline Degradation

Decoration of Monodisperse Silver Vanadate on Biomass‐Derived Porous Carbon: A Dual‐Purpose Catalyst for Detection of p‐Nitrophenol and Photodegradation of Rhodamine B

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A dual-oxidant advanced oxidation process system containing CaO2 and peroxymonosulfate for organic pollutant degradation: High adaptability and synergistic effect

Cited by 18 publications

References 61 publications

Synthesis of VO‐TiO2/VC‐g‐C3N4 Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Synthesis of VO‐TiO2/VC‐g‐C3N4 Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Improvement of Carbonyl Groups and Surface Defects in Carbon Nanotubes to Activate Peroxydisulfate for Tetracycline Degradation

Decoration of Monodisperse Silver Vanadate on Biomass‐Derived Porous Carbon: A Dual‐Purpose Catalyst for Detection of p‐Nitrophenol and Photodegradation of Rhodamine B

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Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites

Synthesis of V_O‐TiO₂/V_C‐g‐C₃N₄ Heterojunction for Improving the Photocatalytic Activity by Introducing Defect Sites