is a better way to include MCX in the mesoporous silica than the direct absorption method. The TEM images of MS and MCX-MS (not shown) exhibit the disordered and interconnected mesopores in both the SiO2 networks, confirming that both MS and MCX-MS had the mesoporous structure. Besides, it also shows that the pore volume of MCX-MS was significantly less than that of MS due to the presence of MCX.