2.1 Materials
The reagents used in this synthesis process were tetraethyl orthosilicate (TEOS, analytical grade, Damao Chemical Reagent Factory, China), tetrabutylammonium hydroxide (TBAOH, 40 wt % aqueous solution, Energy Chemical, China), aluminum isopropoxide (analytical grade, Aladdin), iron citrate (analytical grade, Aladdin), iron (III) chloride (Adamas-beta), benzyl alcohol (analytical grade, Damao Chemical Reagent Factory, China), and 1,3,5-trimethylbenzene (analytical grade, Aladdin). All water in the experiment was deionized water.