Coordinating the exciton-mediated and carrier-mediated photocatalytic mechanisms of carbon nitride using acetylacetone for enhancing emerging contaminants removal

You, Qinglun; Zhang, Chunsheng; Cao, Min; Chen, Ping; Wang, Huijiao; Wang, Yujue; Huang, Jun; Deng, Shubo; Yu, Gang

doi:10.1016/j.apcatb.2023.123025

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…The quenching of the PH intensity was observed for both the dye added solution as compared to their respective standalone photocatalytic systems, which can be attributed to triplet exciton energy transfer from carbon nitride to dye molecule. 72 The quenching was found to be higher for the E-C 3 N 4 case, which confirms its greater degradation efficiency than bulk via the triplet EET pathway. Overall, both the ROS and excitonmediated degradation mechanisms play a collective role in the degradation of the hematein dye.…”

Section: Photocatalytic Degradation Of Hemateinmentioning

confidence: 69%

“…For further corroboration, we have carried out the PH spectroscopic investigation for the dye added solutions. The quenching of the PH intensity was observed for both the dye added solution as compared to their respective standalone photocatalytic systems, which can be attributed to triplet exciton energy transfer from carbon nitride to dye molecule . The quenching was found to be higher for the E-C 3 N 4 case, which confirms its greater degradation efficiency than bulk via the triplet EET pathway.…”

Section: Resultsmentioning

confidence: 99%

“…The exciton-mediated energy transfer (EET) mechanism has been accounted in several reports for the removal of environmental pollutants by using carbon nitride. − Therefore, we have investigated the role of the EET mechanism in the degradation of hematein by using B-C 3 N 4 and E-C 3 N 4 (0.5 mg/mL) in the anaerobic conditions as the saturated N 2 environment can eliminate the possibility of dye degradation via reactive oxygen species (ROS) radical-mediated mechanism Figure S8a shows the kinetics of hematein photodegradation using B-C 3 N 4 and E-C 3 N 4 nanosheets ( C 0 / C ) as a function of light exposure time in the saturated N 2 atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…71−73 Therefore, we have investigated the role of the EET mechanism in the degradation of hematein by using B-C 3 N 4 and E-C 3 N 4 (0.5 mg/mL) in the anaerobic conditions as the saturated N 2 environment can eliminate the possibility of dye degradation via reactive oxygen species (ROS) radical-mediated mecha-nism. 72 Figure S8a shows the kinetics of hematein photodegradation using B-C 3 N 4 and E-C 3 N 4 nanosheets (C 0 /C) as a function of light exposure time in the saturated N 2 atmosphere. Bulk and exfoliated C 3 N 4 showed ∼34 and ∼41% of hematein degradation, respectively after 2 h solar irradiation.…”

Section: Photocatalytic Degradation Of Hemateinmentioning

confidence: 99%

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Unveiling the Mechanistic Aspects of Solar-Driven Hematein Remediation Using Biocompatible Metal-Free Carbon Nitride Nanosheets

Durairaj,

Bhatt,

Murugesan

et al. 2024

J. Phys. Chem. C

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Hematein, the oxidized form of hematoxylin, is extensively used in laboratories for cell identification. Despite its known adverse effects on the environment, there is currently no standardized method for hematein treatment. With the objective of developing a simplified approach for hematein degradation at the point of use, we evaluated the photocatalytic performance of the as-prepared polymeric graphitic carbon nitride (C 3 N 4 ). The formation of exfoliated C 3 N 4 (E-C 3 N 4) was confirmed through the observation of reduced sheet thickness, increased surface area, and a modified band gap. E-C 3 N 4 exhibited a higher degradation rate compared to bulk C 3 N 4 under solar irradiation owing to the lower charge transfer resistance and improved charge separation. Transient absorption spectroscopy revealed that the hot electrons of E-C 3 N 4 readily transfer to the photoactive sites and efficiently facilitate hematein degradation. Additionally, we also noted the degradation of hematein occurring through an excitonmediated energy transfer pathway. The catalytic performance appeared to improve with an increase in the catalyst concentration. Notably, E-C 3 N 4 demonstrated consistent degradation performance over five cycles. Our results confirm that hematein can be repeatedly degraded in the laboratory using the biocompatible E-C 3 N 4 , and the byproducts generated during hematein degradation were found to be biocompatible. This study represents a step toward developing an environmentally friendly and efficient method for hematein treatment in laboratory settings.

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Section: Photocatalytic Degradation Of Hemateinmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%