“…The core-shell structured TiO 2 was prepared using a modified alcoholysis method reported in our previous work. 23 Briefly, 10 mL of glycerol (Aladdin, AR) and 20 mL of ethanol (EtOH; Aladdin, AR) were mixed at 25 ± 0.5 °C, and then 10 mL of ether (Guangzhou, AR) were added dropwise into the solution. After stirring for 10 min, 1 mL of TiOSO 4 (Sigma-aldrich, ∼15 wt % in dilute sulfuric acid) was carefully dropped into the solution and the mixture was stirred for 30 min.…”