Furthermore, it was confirmed that ZrATMP/ZrHEDP films could be prepared by the same method. It indicates a possibility that membranes containing various ZrP-based inorganic particles can be readily obtained by modifying the reactant in the conversion. There are many possible applications of membranes containing ZrP derivatives, not only as proton conductors for PEMFC but also as catalysts, harmful ion removal, antibacterial materials, and support materials for SSAs. Therefore, the method developed in this study can be a platform for functional membranes based on diverse ZrP derivatives with high contents and percolated structure.