Enhanced Photocatalytic Degradation of 2-Chlorophenol Over Z-Scheme Heterojunction of Cds-Decorated Oxygen-Doped G-C3n4 Under Visible-Light

36 Pages Posted: 26 Jul 2022

See all articles by Zhuzhu Zhang

Zhuzhu Zhang

Soochow University

Rui Ji

Soochow University

Jinghui He

Soochow University

Dongyun Chen

Soochow University

Najun Li

Soochow University

Hua Li

Soochow University

Antonio Marcomini

Ca Foscari University of Venice

Qingfeng Xu

Soochow University

Jianmei Lu

Soochow University

Abstract

Constructing photocatalysts with outstanding visible light utilization efficiency and high-efficiency photogenerated charge transfer rate is the key to the photodegradation of organic pollutants in wastewater. Oxygen-doped graphitic carbon nitride (g-C3N4) responsive to a broad visible light range was prepared, to which CdS nanoparticles (NPs) were anchored to fabricate a Z-scheme heterojunction, constructing abundant charge transport orbitals that facilitate interfacial photogenerated charge separation. Meanwhile, density functional theory (DFT) calculations and electron spin resonance (ESR) tests proved that oxygen-doped g-C3N4/CdS-3 (O-CN/CdS-3) followed the Z-scheme charge transfer mechanism. The results showed that O-CN/CdS-3 degraded 10 ppm of 2-chlorophenol (2-CP) within 60 min, with a degradation rate constant (k = 0.10832) of around 11.5-fold that of g-C3N4 (0.00945). Furthermore, the active species and main intermediate products were also studied to explore the possible degradation pathway of 2-CP. Overall, this strategy provides insight for constructing other Z-scheme heterojunction photocatalysts for the efficient degradation of CPs.

Keywords: photocatalysis, O-doped g-C3N4, Z-scheme heterojunction, Chlorophenols degradation

Suggested Citation

Zhang, Zhuzhu and Ji, Rui and He, Jinghui and Chen, Dongyun and Li, Najun and Li, Hua and Marcomini, Antonio and Xu, Qingfeng and Lu, Jianmei, Enhanced Photocatalytic Degradation of 2-Chlorophenol Over Z-Scheme Heterojunction of Cds-Decorated Oxygen-Doped G-C3n4 Under Visible-Light. Available at SSRN: https://ssrn.com/abstract=4172815 or http://dx.doi.org/10.2139/ssrn.4172815

Zhuzhu Zhang

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Rui Ji

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Jinghui He

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Dongyun Chen

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Najun Li

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Hua Li

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Antonio Marcomini

Ca Foscari University of Venice ( email )

Dorsoduro 3246
Venice, Veneto 30123
Italy

Qingfeng Xu

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

Jianmei Lu (Contact Author)

Soochow University ( email )

No. 1 Shizi Street
Taipei, 215006
Taiwan

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