Fig. 6

a UV-vis spectral changes of Nip by using 0.025 mg of S2 as catalyst. b Time-dependent UV-vis spectrum of Nip without any catalysts. c Normalized concentration change of Nip in the presence of 0.025 mg as-prepared samples
a UV-vis spectral changes of Nip by using 0.025 mg of S2 as catalyst. b Time-dependent UV-vis spectrum of Nip without any catalysts. c Normalized concentration change of Nip in the presence of 0.025 mg as-prepared samples