Fig. 2

A The UV/Vis/NIR absorption spectrum of the Cu₃SnS₄ NFs. B Photographs of the Cu₃SnS₄ mediated and time-dependent degradation of MB. C Time-dependent UV/Vis absorption spectra of MB solution after incubation with Cu₃SnS₄ under visible light irradiation. D Time-dependent UV/Vis absorption spectra of MB solution after incubation with Cu₃SnS₄ and/or H₂O₂ under visible light irradiation. E Time-dependent concentration change of MB after incubation with Cu₃SnS₄ and/or H₂O₂. F UV/Vis absorption spectra of MB solution after incubation with Cu₃SnS₄ in the presence of t-BuOH, NaN₃, or benzoquinone, demonstrating the influence of t-BuOH, NaN₃, and benzoquinone on the Cu₃SnS₄-activated MB degradation. G–I EPR spectra of G •OH, H ¹O₂, and I O₂^•− upon dispersion of Cu₃SnS₄ into deionized water under visible light irradiation for different times