Noncontact Synergistic Effect between Au Nanoparticles and the Fe₂O₃ Spindle Inside a Mesoporous Silica Shell as...

An Au-Fe₂O₃@mesoporous SiO₂ nanoreactor with a multiyolks/shell structure was synthesized through a multistep method. In this nanoreactor, the spindle Fe₂O₃ and Au nanoparticles were inside the same mesoporous SiO₂ shell as the yolks but in a noncontact manner. The noncontact synergistic effect between Au nanoparticles and the Fe₂O₃ spindle was studied with a Fenton-like reaction. The catalytic activity of the Au-Fe₂O₃@mesoporous SiO₂ nanoreactor to the Fenton-like reaction for the degradation of organic dyes was dramatically enhanced by the noncontact synergistic effect.