fig6

Figure 6. (A) Time course of H₂ evolution; (B) Photocatalytic performance of GTx (x = 0, 5, 15, 20, 30 and 35) for H₂ production and the stability of GT15 during H₂ production in simulated seawater. In standard photocatalytic testing, Pt was employed as the co-catalyst while methanol served as the sacrificial agent; (C) Correlations between the phase structure and specific mass photocatalytic H₂ yield of GTx HPJs; (D) Stability of GT15 during H₂ production in simulated seawater; (E) XRD patterns of GT15 sample before and after recycling test; (F) UV-Vis DRS of GT0, GT5, GT15, GT20, GT30 and GT35 after Pt loading; (G) Efficiency curves of GTx (x = 0, 5, 15, 20, 30 and 35) photocatalytic degradation to RhB; (H) Corresponding degradation kinetic; (I) Photodegradation rate constant of GTx (x=0, 5, 15, 20, 30 and 35). XRD: X-ray diffraction; UV-Vis DRS: UV-visible diffuse reflectance spectroscopy; GTx HPJs: anatase/rutile TiO₂ hetero-phase junctions.