Rapidly photocatalytic mineralization of typical veterinary drugs with the SnO2/SnIn4S8 composite

Yuancai Lv; Zhendong Yu; Siyi Huang; Fucai Deng; Kaiyun Zheng; Guifang Yang; Yifan Liu; Chunxiang Lin; Xiaoxia Ye; Minghua Liu

doi:10.1016/j.chemosphere.2020.129452

Rapidly photocatalytic mineralization of typical veterinary drugs with the SnO₂/SnIn₄S₈ composite

Chemosphere. 2021 May:271:129452. doi: 10.1016/j.chemosphere.2020.129452. Epub 2020 Dec 28.

Authors

Yuancai Lv¹, Zhendong Yu², Siyi Huang³, Fucai Deng⁴, Kaiyun Zheng⁵, Guifang Yang⁶, Yifan Liu⁷, Chunxiang Lin⁸, Xiaoxia Ye⁹, Minghua Liu¹⁰

Affiliations

¹ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: yclv@fzu.edu.cn.
² Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: n190627064@fzu.edu.cn.
³ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: 515380569@qq.com.
⁴ Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, PR China. Electronic address: 33994921@qq.com.
⁵ School of Civil and Environment Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, 518055, China. Electronic address: 19s054074@stu.hit.edu.cn.
⁶ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: 396550322@qq.com.
⁷ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: yfanym@fzu.edu.cn.
⁸ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: lcx2010@fzu.edu.cn.
⁹ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: yexiaoxia@fzu.edu.cn.
¹⁰ Research Institute of Photocatalysis, College of Environment & Resources, Fuzhou University, Fuzhou, 350116, China. Electronic address: mhliu2000@fzu.edu.cn.

PMID: 33434825
DOI: 10.1016/j.chemosphere.2020.129452

Abstract

Considering the high environmental risk, the remediation of veterinary drug pollutants aroused numerous concerning. In this paper, a novel photocatlyst, SnO₂/SnIn₄S₈, was fabricated by in situ precipitation and hydrothermal method and then employed to simulate photocatalytic degradation of olaquindox under visible light. The SEM, TEM, XRD, XPS and electrochemical results clearly showed that the n-type heterojunction between SnO₂ and SnIn₄S₈ was successfully constructed, which greatly reduce the recombination of the photogenic electron and holes, leading to the improvement of photocalytic performance and stability (recycled over 10 times). Besides, the SnO₂/SnIn₄S₈ composite also exhibited good ability to mineralize the olaquindox. Under the optimal condition (pH of 3, 1 g L^-1 of 30 wt% SnO₂/SnIn₄S₈ and 10 mg L^-1 of initial olaquindox concentration), the olaquindox could be fully and rapidly degraded in 25 min, and completely mineralized in 2 h (99.3 ± 1.7%). LC-QTOF-MS analysis evidently displayed 10 intermediates during the olaquindox degradation. In addition, with the attack of the reactive oxygen species (h⁺, •OH and •O₂^-), olaquindox could be effectively decomposed via deoxygenation, hydroxylation and carboxylation reactions. Importantly, compared to photodegradation, the photocatalytic process was an ideal way to eliminate the olaquindox form water because it could avoid the accumulation of toxic byproducts.

Keywords: Degration; Metal sulfide photocatalysts; Pathway; Photocatalysis; Veterinary drug.

MeSH terms

Catalysis
Light
Photolysis
Piperidines
Veterinary Drugs*

Substances

Piperidines
Veterinary Drugs
S(8)