Hierarchical micro-nanostructures from polyoxometalates and polydopamine: Characterization, electrochemical and intrinsic peroxidase-like properties--颗粒学报PARTICUOLOGY

Lv, R., Zhang, X., Sun, R., Chen, L., Zhang, Y., Sheng, R., . . . Qi, Y. (2022). Hierarchical micro-nanostructures from polyoxometalates and polydopamine: Characterization, electrochemical and intrinsic peroxidase-like properties. Particuology, 64, 178-185. https://doi.org/10.1016/j.partic.2021.07.004

Hierarchical micro-nanostructures from polyoxometalates and polydopamine: Characterization, electrochemical and intrinsic peroxidase-like properties

Ruijuan Lv, Xinming Zhang, Ruimeng Sun, Lixia Chen, Yang Zhang, Rongtian Sheng, Ting Du, Yuhan Li, Yanfei Qi ^*

School of Public Health, Jilin University, Jilin 130021, China

10.1016/j.partic.2021.07.004

Volume 64, May 2022, Pages 178-185

Received 31 May 2021, Revised 24 June 2021, Accepted 23 July 2021, Available online 9 August 2021, Version of Record 17 December 2021.

E-mail: qiyanfei@jlu.edu.cn

Highlights

• Hierarchical XW₉@PDA composite materials are synthesized.

• The as-obtained XW₉@PDA composites possess enhanced peroxides activity.

• A colorimetric assay for H₂O₂ is constructed using PW₉@PDA composites.

• An electrochemical response toward H₂O₂ is constructed on PW₉@PDA composites.

Abstract

Hybrid composite materials with hierarchical structures have attracted continuing attention for their enhanced features and various applications. The new hybrid composites XW₉@PDA (XW₉ means Na₈H[α-PW₉O₃₄], Na₁₀[α-SiW₉O₃₄] and Na₁₀[α-GeW₉O₃₄]; PDA means polydopamine) have been synthesized for potential sensing applications. The effect of polyoxometalates on the formation of the hybrid composites was investigated. Scanning electron microscopy (SEM) supported the obtained XW₉@PDA were hierarchical microsphere. By monitoring the reaction of classical peroxidase substrate o-phenylenediamine (OPD) to form yellow 2, 3-diaminophenazine (DAB) in the presence of H₂O₂, the peroxidase-like activity of XW₉@PDA was calculated. The results showed that XW₉@PDA still keep the peroxidase-like activity and have 505.98%, 208.58% and 582.78% enhancement in intrinsic catalytic activity for PW₉@PDA, SiW₉@PDA and GeW₉@PDA. Among the three composites, PW₉@PDA showed the highest peroxidase-like activity. Therefore, PW₉@PDA was applicable to the colorimetric and electrochemical sensing for H₂O₂.

Graphical abstract

Keywords

Polyoxometalates; Composites; Dopamine; Electrochemical; Peroxidase-like activity

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