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Fei J, Yang W, Dai Y, Xu W, Fan H, Zheng Y, Zhang J, Zhu W, Hong J, Zhou X. A biosensor based on Fe 3O 4@MXene-Au nanocomposites with high peroxidase-like activity for colorimetric and smartphone-based detection of glucose. Mikrochim Acta 2023; 190:336. [PMID: 37515610 DOI: 10.1007/s00604-023-05900-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/28/2023] [Indexed: 07/31/2023]
Abstract
A novel magnetic nanozyme Fe3O4@MXene-Au nanocomposite, which possessed higher peroxidase-like activity than that of Fe3O4 nanoparticles and Fe3O4@MXene nanocomposites, was developed. The outstanding magnetic properties of the nanozyme endowed it with the ability of simple and rapid separation, achieving great recyclability. Based on Fe3O4@MXene-Au nanocomposites and glucose oxidase (Glu Ox), a highly selective colorimetric biosensor for glucose detection was developed. Fe3O4@MXene-Au nanocomposites can catalyze H2O2 produced from glucose catalyzed by glucose oxidase to ·OH and oxidize colorless 3,3',5,5'-tetramethylbenzidine (TMB) to blue oxidized TMB (oxTMB) with a significant absorbance at 652 nm. The linear range of glucose was 0-1.4 mM under optimal conditions, with a limit of detection (LOD) of 0.11 mM. Glucose in human whole blood was successfully detected with satisfactory recoveries. Furthermore, a facile agarose hydrogel detection platform was designed. With smartphone software, glucose detection can be realized by the agarose hydrogel platform, demonstrating the potential in on-site and visual detection of glucose.
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Affiliation(s)
- Jianwen Fei
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Wei Yang
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yin Dai
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Wei Xu
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Huizhu Fan
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Yani Zheng
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Jun Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China
| | - Wanying Zhu
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - Junli Hong
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - Xuemin Zhou
- School of Pharmacy, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
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