Synthesis, Analysis, and Testing of BiOBr-Bi₂WO₆ Photocatalytic Heterojunction Semiconductors

Figure 11

UV-Vis spectra of the samples taken during the degradation process and the RhB solutions with different initial pH: (a) pH = 2, (b) pH = 5, (c) pH = 7, (d) pH = 9, and (e) pH = 12 (photocatalysts: BiOBr (50 at%)-Bi₂WO₆ composites synthesized for 6 h under 120°C; catalysts dosage: 1.0 g/L; temperature: ()°C; and initial concentration: 20 ppm).

(a)

(b)

(c)

(d)

(e)