Wells-Dawson POMs Boosting Fe2O3 Peroxidase-Like Activity for Salicylic Acid Colorimetric Detection
摘要
Developing highly effectively peroxidase-like nanozyme for salicylic acid (SA) colorimetric detection is very important for biotechnology of aspirin. Herein, Wells-Dawson polyoxometalate (POMs) boosting Fe2O3 composite (P2W18@Fe2O3) was designed and prepared by calcinating P2W18@MIL-101(Fe) as self-sacrificial precursors and templates. As a result, P2W18@Fe2O3 shows better peroxidase-like activity than Fe2O3, owing to the strong ion conductivity and multi-electron redox of P2W18. Meanwhile, because SA has good strong complexation ability to Fe3+, a sensitive SA colorimetric detection was developed with the detection limit at 0.21 µM in the linear range of 1 − 100 µM.