Enhanced chemiluminescence of luminol via InS/MXene composite as a novel Co-reactant accelerator for UV-filter Benzophenone-3 determination.

In this study, a novel In₂S₃/MXene composite was developed as a co-reactant accelerator to enhance the chemiluminescence (CL) performance of the classical luminol-H₂O₂ system. The In₂S₃ and MXene heterojunction catalyzed the CL reaction through synergistic effect, facilitating the generation of reactive oxygen species and increasing CL intensities. This enhanced system was applied for the first time to detect an ultraviolet (UV) filter-benzophenone-3 (BP-3) by leveraging its light absorption property. The proposed CL method exhibited excellent sensitivity, with a linear detection range for BP-3 spanning from 1 × 10⁻ mol/L to 1 × 10⁻⁹ mol/L and a detection limit of 5.28 × 10⁻ mol/L (S/N = 3). The method was validated by successfully detecting BP-3 in real water samples, demonstrating its potential in monitoring UV-absorbing pollutants in environments.