A Needle‐Like MOFzyme with High Aspect Ratio and Extended pH/Temperature Working Ranges for Total Antioxidant Capacity Determination and Oxidant‐/Light‐Free Dye Degradation
Year: 2026
Type: article
Abstract: A needle‐like MOFzyme with high aspect ratio and extended pH/temperature working ranges was developed for quantification of total antioxidant capacity (TAC) and oxidant‐/light‐free dye degradation. The MOFzyme showed a length, width, and high aspect ratio of 17 ± 8 µm, 1.5 ± 0.6 µm, and 11.33, respectively. A superb oxidase‐like activity, an enhanced V max of 0.14 nM s −1 , an improved K m of 0.12 mM, a wide pH range of 3.0–8.0, and an extended thermal range of 25–70°C were obtained, revealing their practical applicability for developing pH‐ and temperature‐independent protocols. The MOFzyme was then utilized for the determination of TAC using trolox as a model antioxidant, providing a linear range of 0.0–200.0 μM, and a very low detection limit of 1.0 μM was obtained for TAC quantification. The selectivity studies showed that other coexisting materials cannot interfere with sensor response. The intra‐day and inter‐day reproducibility assays showed a %RSD as low as 1.7% and 2.36% for the sensor. The dye degradation was performed using rhodamine B as a model molecule, revealing 99.7% degradation within 40.0 min without any oxidant/light irradiation and 10 cycles of reusability. The applicability of the MOFzyme for real food and sustainable environmental applications was proved.
Source: ChemistryOpen
DOI: 10.1002/open.70196
Institutions: University of Guilan, Dong-A University, University of Kashan
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,790
OpenAlex ID: W7155624564