ZnO/ZnFe2O4 nanocomposite-based electrochemical nanosensors for the detection of furazolidone in pork and shrimp samples: exploring the role of crystallinity, phase ratio, and heterojunction formation. (24th March 2022)

• Record Type: Journal Article
• Authors: Anh, Nguyen Tuan; Huyen, Nguyen Ngoc; Dinh, Ngo Xuan; Vinh, Le Khanh; Tung, Le Minh; Vinh, Nguyen Thanh; Quy, Nguyen Van; Lam, Vu Dinh; Le, Anh-Tuan
• Is Part Of: New journal of chemistry. Volume 46:Number 15(2022)
• Page Start: 7090
• Page End: 7102
• Publication Date: 2022-03-24
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj05837a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The effect of crystallinity, phase ratio, and heterojunction formation on the FZD sensing performance of ZnO/ZnFe2 O4 nanocomposite-based electrochemical sensors was investigated. Abstract : In this study, we have investigated the influence of crystallinity, phase ratio, and heterojunction formation on the sensing performance of ZnO/ZnFe2 O4 (ZnO/ZFO) nanocomposite-based electrochemical sensors for the detection of furazolidone (FZD) antibiotic drug. Results obtained show that the crystallinity and phase ratio of ZnO/ZFO nanocomposites have decisive effects on their electron transfer and active site density. Tuning the crystallinity and ZnO content of ZnO/ZFO nanocomposites is an effective way to enhance the FZD electrochemical sensing performance. Findings from this research suggested that the formation of ZnO/ZFO heterojunction could significantly improve their electrochemical responses for FZD due to arising of the internal electric field and redistribution of Zn 2+, Fe 3+ cations. Under optimized conditions, the ZnO/ZFO-2-based FZD electrochemical sensor reached an electrochemical sensitivity of 0.78 μA μM −1 cm −2 with a LOD of 0.65 μM in the detection range of 1–100 μM. In addition, all these ZnO/ZFO nanocomposites-based electrochemical sensors offer satisfactory repeatability, selectivity, long-term stability, and practical feasibility in pork and shrimp samples. The insights obtained will benefit the future design of ZnFe2 O4 nanomaterial-based high-performance electrochemical sensors for monitoring residual antibiotics in real food samples.