The role of Cs dopants for improved activation of molecular oxygen and degradation of tetracycline over carbon nitride

Liu, Qian; Li, Hui; Zhang, Hao; Shen, Zhurui; Ji, Huiming

doi:10.1016/j.cclet.2021.12.089

Cited by 38 publications

(11 citation statements)

References 29 publications

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“…NBT is a commonly employed probe for •O 2 − quantification. 44 It was observed that the amount of •O 2 − in the OCN system (44.91 μmol/L) was similar to that in the CN system (43.35 μmol/L) (see Figure 5a). However, the capacity of OCN (2.15 μmol/L) exhibited a higher capacity for H 2 O 2 production than CN (1.21 μmol/L) (see Figure 5b).…”

Section: ■ Results and Discussionmentioning

confidence: 65%

“…To gain further insights into the boosted photocatalytic performance of OCN in ATZ degradation compared with CN, the generation of ROS by OCN and CN during the photocatalytic process was quantified. NBT is a commonly employed probe for ·O 2 – quantification . It was observed that the amount of ·O 2 – in the OCN system (44.91 μmol/L) was similar to that in the CN system (43.35 μmol/L) (see Figure a).…”

Section: Resultsmentioning

confidence: 83%

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Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

Peng,

Ye,

Wang

et al. 2024

Langmuir

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Elaborating the specific reactive oxygen species (ROS) involved in the photocatalytic degradation of atrazine (ATZ) is of great significance for elucidating the underlying mechanism. This study provided conclusive evidence that hydroxyl radicals (•OH) were the primary ROS responsible for the efficient photocatalytic degradation of ATZ, thereby questioning the reliability of widely adopted radical quenching techniques in discerning authentic ROS species. As an illustration, oxygenmodified g-C 3 N 4 (OCN) was prepared to counteract the limitations of pristine g-C 3 N 4 (CN). Comparative assessments between CN and OCN revealed a remarkable 10.44-fold improvement in the photocatalytic degradation of ATZ by OCN. This enhancement was ascribed to the increased content of C−O functional groups on the surface of the OCN, which facilitated the conversion of superoxide radicals (•O 2 − ) into hydrogen peroxide (H 2 O 2 ), subsequently leading to the generation of •OH. The increased production of •OH contributed to the efficient dealkylation, dechlorination, and hydroxylation of ATZ. Furthermore, toxicity assessments revealed a significant reduction in ATZ toxicity following its photocatalytic degradation by OCN. This study sheds light on the intricate interconversion of ROS and offers valuable mechanistic insights into the photocatalytic degradation of ATZ.

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Section: ■ Results and Discussionmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 83%

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

Peng,

Ye,

Wang

et al. 2024

Langmuir

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“…Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), benzoquinone (BQ), isopropyl alcohol (IPA) and 4-hydroxy-2,2,6,6-tetramethylpiperidine (TMP) were used to trap the h + , superoxide radicals (˙O 2 − ), ˙OH and singlet oxygen ( 1 O 2 ), respectively. 47 As shown in Fig. S10,† the photocatalytic activities are suppressed after adding EDTA-2Na and BQ, revealing that h + and ˙O 2 − are the dominant species for TC degradation over 2.7BMO.…”

Section: Resultsmentioning

confidence: 91%

“…˙OH and singlet oxygen ( 1 O 2 ), respectively. 47 As shown in Fig. S10, † the photocatalytic activities are suppressed after adding EDTA-2Na and BQ, revealing that h + and ˙O2 − are the dominant species for TC degradation over 2.7BMO.…”

Section: Environmental Science: Nano Papermentioning

confidence: 92%

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

Song

Zada

et al. 2023

Environ. Sci.: Nano

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“…In general, the activation of molecular oxygen over heterogeneous catalysts is thought to proceed via an electron transfer process. [17][18][19][20][21] Creating of oxygen vacancies, one of the most effective route to tune surface electron density heterogeneous catalysts, [22] was usually proposed to promote the activation of molecular oxygen to form ROS. However, only part of ROS such as singlet oxygen ( 1 O 2 ) can be used as reactive species by [2 + 2] photochemical cycloaddition with styrene to form styrene oxide.…”

Section: Introductionmentioning

confidence: 99%

Perovskite LaSrCoFeO₆ Oxide Enabled Visible Light Catalytic Aerobic Epoxidation of Styrene

Fang

Tang

et al. 2022

ChemPhotoChem

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In the search for a highly efficient heterogeneous catalyst for the epoxidation of styrene, it is still a challenge to develop a system that simultaneously possesses superior catalytic activity and selectivity under aerobic conditions. Herein, we report the use of perovskite LaSrCoFeO6 (LSCF) as a heterogeneous and visible‐light catalyst, and determine that LSCF acts as a highly efficient catalyst for the epoxidation of styrene under aerobic conditions. The formation of 1O2 species transformed from O2⋅− species were proposed as reactive oxygen species for the epoxidation of styrene over the LSCF catalyst, where the directional generation of O2⋅− species on the LSCF catalyst is the key step to yield highly selective epoxidation of styrene. The experimental results of styrene epoxidation show that when the molar ratio of styrene and LSCF catalyst is 150 : 1 and the reaction is under the conditions of visible light (440 nm) and 100 °C for 6 h, the conversion of styrene and selectivity of styrene oxide reached 99.9 % and 80.3 %, respectively. The reaction rate over LSCF catalyst is as high as 50 mmol ⋅ gcat−1 ⋅ h−1. In addition, the reaction kinetics of the epoxidation of styrene over LSCF catalyst was systematically studied.

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The role of Cs dopants for improved activation of molecular oxygen and degradation of tetracycline over carbon nitride

Cited by 38 publications

References 29 publications

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

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

Perovskite LaSrCoFeO₆ Oxide Enabled Visible Light Catalytic Aerobic Epoxidation of Styrene

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The role of Cs dopants for improved activation of molecular oxygen and degradation of tetracycline over carbon nitride

Cited by 38 publications

References 29 publications

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C3N4: Investigation of the Reactive Oxygen Species Interconversion

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C3N4: Investigation of the Reactive Oxygen Species Interconversion

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

Perovskite LaSrCoFeO6 Oxide Enabled Visible Light Catalytic Aerobic Epoxidation of Styrene

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Product

Resources

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Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

Boosted Photocatalytic Degradation of Atrazine Using Oxygen-Modified g-C₃N₄: Investigation of the Reactive Oxygen Species Interconversion

Perovskite LaSrCoFeO₆ Oxide Enabled Visible Light Catalytic Aerobic Epoxidation of Styrene