**Appendix A**


**Table A1.** Results of TGA analysis for Zn-Ti LDH, m-LDH and stearic acid.

**Figure A1.** <sup>1</sup>H nuclear magnetic resonance (H-NMR) spectra of PBSA.

**Figure A2.** FTIR result of PBSA and its composites after different irradiation time. (**a**) PBSA; (**b**) PBSA-m-LDHD-1; (**c**) PBSA-m-LDHD-3; (**d**) PBSA-m-LDHD-5.
