The coordination effect of organic ligands in Ce-MOF brings about atomically dispersed Fe in CeO2 for TAC detection in commercial samples

Lulu Cui; Houshen Li; Weijie Shi; Yingying Jing; Shuhong Sun; Shiyun Ai; Zeyi Guo

doi:10.1016/j.talanta.2024.127405

The coordination effect of organic ligands in Ce-MOF brings about atomically dispersed Fe in CeO₂ for TAC detection in commercial samples

Talanta. 2024 Dec 16:285:127405. doi: 10.1016/j.talanta.2024.127405. Online ahead of print.

Authors

Lulu Cui¹, Houshen Li², Weijie Shi², Yingying Jing³, Shuhong Sun⁴, Shiyun Ai⁵, Zeyi Guo⁶

Affiliations

¹ School of Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China.
² School of Chemistry and Materials Science, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China.
³ College of Biological and Chemical Engineering, Qilu Institute of Technology, Jinan, 250200, PR China.
⁴ School of Veterinary Medicine, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China; Shandong Provincial Key Laboratory of Zoonoses, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China. Electronic address: sunshuhong@sdau.edu.cn.
⁵ School of Chemistry and Materials Science, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China; School of Food Science and Engineering, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China. Electronic address: ashy@sdau.edu.cn.
⁶ School of Chemistry and Materials Science, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China; School of Food Science and Engineering, Shandong Agricultural University, No. 61 Daizong Street, Taian, 271000, PR China. Electronic address: guozy@sdau.edu.cn.

PMID: 39689638
DOI: 10.1016/j.talanta.2024.127405

Abstract

Reducing the size of active species is a powerful means to improve the utilization rate of active metals and enhance the properties of bimetallic nanozymes. In this work, Fe was introduced into Ce-MOF through the coordination of Fe³⁺ and organic ligands, and the coordination effect resulted in atomically dispersed Fe in the derived Fe/CeO₂ nanozyme. Due to the atomically dispersed Fe embedded in the lattice of CeO₂, a large number of defect sites were generated, endowing the nanozyme with excellent peroxidase (POD)-like activity. The constructed total antioxidant capacity (TAC) sensor based on the POD-like activity of Fe_1.01/CeO₂ nanozyme displayed a very wide linear concentration range for AA, Cys, Glu and Trolox. More importantly, this TAC sensor can be applied to the TAC detection in vitamin C tablets and beverages. This work provides theoretical guidance for the synthesis of high-performance bimetallic nanozymes for TAC detection.

Keywords: Beverages; Bimetallic oxide; Ce-BTC; Nanozyme; Peroxidase-like activity.