Silver Nanoparticles Confined in SBA-15 Mesoporous Silica and the Application as a Sensor for Detecting Hydrogen Peroxide

Figure 5

(a) UV-vis spectra of (line 1) APTMS-TMCS-SBA-15 and (line 2) Ag-^mSBA-15 immerged in 1 M NaOH solution, (b) Successive UV-vis spectra (taken every 1 minute) of methylene blue (MB) dye reduction, using silica SBA-15 containing silver nanoparticles (Ag-^mSBA-15) as the catalyst and NaBH₄ as the reducing agent. UV-vis spectrum of MB dye with pure silica SBA-15, using NaBH₄ as the reducing agent (dash line).

(a)

(b)