The high peroxidase-like activity of pyrite FS2/SiO2 hollow spheres for ascorbic acid detection

Ascorbic acid (AA) is widely used in different fields, which causes diseases for extensive application. It is necessary to accurately and rapidly detect the content of AA. Pyrite FeS2/SiO2 hollow spheres were synthesized. The composite shows the improved surface area and the electrostatic attraction for the substrate compared with that of pyrite FeS2. And it exhibited excellent peroxidase-like activity than that of pyrite FeS2 and was used to detect AA with a limit of detection (LOD) as small as 0.026 mu M for 1 min.

Automated summary

Ascorbic acid (AA) is commonly used but its extensive application can lead to diseases. Researchers have synthesized pyrite FeS2/SiO2 hollow spheres, which have a larger surface area and better peroxidase-like activity compared to pyrite FeS2. These hollow spheres can detect AA with a limit of detection (LOD) of 0.026 µM in just 1 minute.