Kill two birds with one stone: To reduce toxicity and enhance photodegradation of antibiotics by lead cesium bromide via tin doping

• Published in: Journal of cleaner production 2024-02, Vol.441, p.141000, Article 141000
• Main Authors: Gao, Jingyang, Wu, Jianhao, Liu, Chunxi, Chen, Zhi, Li, Lan, Hu, Jinglei, Li, Chunyan, Liu, Yurong, Wang, Xu-Sheng, Wang, Wen
• Format: Article
• Language: English
• Subjects: Anti-solvent precipitation; Antibiotic disposal; CsPbBr3 perovskite; Sn doped; Visible-light photodegradation
• ISSN: 0959-6526; 1879-1786
• DOI: 10.1016/j.jclepro.2024.141000

Inorganic perovskite lead cesium bromide (CsPbBr3) has attracted great attention due to its excellent photocatalytic capability. However, the intrinsic toxicity of Pb hindered its wide application in photo-electric fields. Herein, an effective modification on the CsPbBr3 was proposed by substituting toxic Pb with low-toxic element Sn, and Sn-doped CsPb1-xSnxBr3 perovskites were synthesized by the simple anti-solvent precipitation which showed improved visible-light photodegradation of antibiotic residue in ethanol. The partially substituted CsPb1-xSnxBr3 (x = 0, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0) perovskite can reduce the toxicity of Pb-based perovskite without destroying the initial structure. The CsPb0.5Sn0.5Br3 displayed a maximum photocatalytic efficiency for the degradation of tetracycline hydrochloride (TC-HCl) (79 %, 60 min). The reaction rate constant was calculated to be 0.1201 min−1, which was 2.0 and 28.8 times higher than the pure CsPbBr3 and CsSnBr3, respectively. Cycling tests showed a minor decrease (