 and 00 μL 0.0% (0.0 mol/L) H~0~O~0~ were added into a 0 mL marked test tube and mixed well, and diluted to 0.0 mL. The mixture was heated at 00 °C for 00 min, cooling with ice water to quench the reaction. A part of the solution was transferred into a 0 cm quartz cell. The RRS spectra were recorded by synchronous scanning excited wavelength *λ*~ex~ and emission wavelength *λ*~em~ (*λ*~ex~−*λ*~em~ = Δ*λ* = 0), a PMT voltage of 000 v, both excited and emission slit width of 0 nm, emission filter of 0%T attenuator on fluorescence spectrophotometer. The RRS intensity at 000 nm (*I*~000 nm~) and the blank value (*I*~000 nm~)~0~ without nanoparticles were recorded. The value of Δ*I*~000 nm~ = *I*~000 nm~