Phosphotungstic acid anchored to amino-functionalized core-shell magnetic mesoporous silica microspheres: A magnetically recoverable nanocomposite with enhanced photocatalytic activity

► Amino-functionalized Fe3O4@SiO2@meso-SiO2 microspheres play as the support. ► H3PW12O40 anchored to the support by chemical bonding to aminosilane groups. ► Characterization of Fe3O4@SiO2@mSiO2NH2PW. ► Enhanced performance in degrading RhB under UV irradiation compared with pure H3PW12O40.