Figure 5. Photocatalytic performances of Ta₃N₅-Pt cloth.

The degradation efficiency of (a) MB aqueous solution (10 mg L⁻¹, 60 mL) and (b) 4-CP aqueous solution (1.28 mg L⁻¹, 60 mL), versus the exposure time under visible light irradiation (λ > 400 nm), in the absence of photocatalyst and in the presence of SiO₂–Pt powder, bulk Ta₃N₅ powder, bulk Ta₃N₅-Pt powder, Ta₃N₅ cloth or Ta₃N₅-Pt cloth. (c) DMPO spin-trapping ESR spectra recorded at ambient temperature in the aqueous solution with Ta₃N₅ cloth for DMPO-·OH under visible light irradiation (λ = 532 nm). (d) Cycling photocatalytic test of Ta₃N₅–Pt nonwoven cloth (20 mg).