1. XRD patterns of M-CN, T-CN, U-CN, M-TCN, T-TCN and U-TCN samples

2. FT-IR spectra of (a) M-CN, T-CN and U-CN samples, and (b) M-TCN, T-TCN and U-TCN samples

3. SEM images of (a) U-CN, (b) U-TCN, (c) T-CN, (d) T-TCN, (e) M-CN and (f) M-TCN

4. (a) N₂ adsorption-desorption isotherms and (b) corresponding pore size distribution curves of M-TCN, T-TCN and U-TCN samples

5. UV-Vis spectra of (a) M-CN, T-CN and U-CN samples and (b) M-TCN, T-TCN and U-TCN samples

6. PL spectra of M-TCN, T-TCN, U-TCN and Am-TiO₂

7. Photocatalytic reduction and removal of Re(VII) using (a) U-CN, T-CN, M-CN, Am-TiO₂ and (b) U-TCN, T-TCN and M-TCN composites under UV-Vis irradiation; (c) Linear fitting of Langmuir-Hinshelwood equation; The photodegradation of RhB using 0.4 g•L^-1 (d) U-TCN, (e) T-TCN and (f) M-TCN under UV-Vis irradiation

8. (a) Transient photocurrent responses and (b) EIS curves of U-TCN, T-TCN and M-TCN composites under UV-Vis irradiation

9. EPR spectra of U-TCN, T-TCN and M-TCN composites (a) in the dark and (b) under UV-visible light irradiation

10. (a) Ti K-edge XANES analysis and (b) EXAFS analysis for the Am-TiO₂, U-TCN and U-TCN/Re

Table 1. Kinetic parameters of photocatalytic reduction and removal of Re(VII) using TCN composites

Table 2. Fitting parameters from the analysis of EXAFS data