74. Titanium dioxide nanoparticles absorb light at wavelengths below 400 nm. After absorbing light,water molecules adsorbed on the surface of titanium dioxide nanoparticles can be directly oxidizedto hydroxide radicals. The produced hydroxyI radicals can decompose the adsorbed pollutants.Which of the following instruments is the most suitable to verify the generation of hydroxideradicals from the reaction of water molecules and titanium dioxide nanoparticles?
(A) High-performance liquid chromatography
(B) Fluorescence spectroscopy
(C) Electron paramagnetic resonance spectroscopy
(D) Nuclear magnetic resonance spectroscopy
(E) X-ray photoelectron spectroscopy