Organic-inorganic nano-hybrid decorated by copper (II) incarceration: A versatile catalytic assembly for the swift reduction of aromatic nitro and dye compounds

•A new heterogeneous Cu(II) catalyst has been fabricated.•The catalyst has shown remarkable efficiency in assisting the reductive conversion of a series of aromatic nitro analogues.•The competence of the catalyst is also explored for the reductive degradation of harmful organic dyes.•Simultaneous degradation of nitro and dye compounds is also reported.