Visible-Light Photocatalytic Degradation Efficiency of Tetracycline and Rhodamine B Using a Double Z‑Scheme Heterojunction Catalyst of UiO-66-NH2/BiOCl/Bi2S3

• Published in: Inorganic chemistry Vol. 63; no. 31; pp. 14578 - 14590
• Main Authors: Xia, Zijie, Wang, Linlin, Tan, Wenqi, Yuan, Linying, He, Xinhua, Wang, Juan, Chen, Luyang, Zeng, Suyuan, Lu, Shigang, Jiao, Zheng
• Format: Journal Article
• Language: English
• Published: American Chemical Society 05.08.2024
• ISSN: 0020-1669; 1520-510X; 1520-510X
• DOI: 10.1021/acs.inorgchem.4c01917

BiOCl is a promising photocatalyst, but due to its weak visible light absorption capacity and low photogenerated electron–hole pair separation rate, its practical application is limited to a certain extent. In this study, a novel double Z-scheme heterojunction UiO-66-NH2/BiOCl/Bi2S3 catalyst was constructed to broaden the visible light response range and promote high photogenerated hole–electron separation of BiOCl. Its photocatalytic performance is evaluated by dissociating tetracycline (TC) and rhodamine B (RhB) in visible light. The optimal proportion of UiO-66-NH2/BiOCl/Bi2S3 hybrids exhibits the best degradation efficiency of visible light illumination (∼93% in 120 min for TC and ∼98% in 60 min for RhB). The synergistic effect of a large visible light response range and the Z-scheme charge transfer mechanism ensure the excellent visible photocatalytic activity of UiO-66-NH2/BiOCl/Bi2S3. It is proven that h+ and •O2 – are the main active substances in the photocatalysis process by active substance capture experiments and electron spin resonance tests. The intermediates and degradation processes are analyzed by high-performance liquid chromatography–mass spectrometry. This study proves that the new UiO-66-NH2/BiOCl/Bi2S3 photocatalyst has great application potential in the field of water pollution degradation and will provide a new idea for the optimization of BiOCl.