Corrigendum to "Catalytic reduction of nitrophenol and MB dye wastewater using homogeneous Pt NPs confined in hierarchically porous silica" [J. Environ. Chem. Eng.]. Issue 4 (August 2021) - Subhan, Fazle; Aslam, Sobia; Yan, Zifeng; Yaseen, Muhammad; Marwat, Anum; Ahmad, Ayaz