Electrovalent bifunctional acid enables heterogeneously catalytic production of biodiesel by (trans)esterification of non-edible oils

•Composite bifunctional materials are synthesized by infrequent electrovalent bonds.•HPW/UiO-66-NH2 is firstly used for catalytic (trans)esterification to give biodiesel.•Rietveld refinement is used to parse the structure of the composite catalyst.•Polymath software is used for multiple-order kinetics studies.•Response surface methodology, thermodynamics, and mechanisms are investigated.