Synthesis and Regulation between NaH(ZnPO 4 ) 2 and α ‐Hopeite via a Solid State Reaction at Low‐heating Temperatures

A simple and novel route for the synthesis of layered sodium hydrogen zinc phosphate, NaH(ZnPO 4 ) 2 , was studied, and the target product was obtained with Na 2 HPO 4 ·12H 2 O and Zn(NO 3 ) 2 ·6H 2 O as raw materials and polyethylene glycol‐400 as a surfactant via a one step solid state reaction at 60 °C. The product was characterized with XRD, TG/DTG and FTIR. The experimental results showed that the NaH(ZnPO 4 ) 2 had only one major step of weight loss for dehydration of HPO 4 2− into P 2 O 7 4− ions at around 500 °C, so it had enough thermal stability to use as heterogeneous catalyzer for organic reactions. The comparison experimental results suggested that aging temperature control the products of the synthesis, that is, the NaH(ZnPO 4 ) 2 was formed when the reaction mixture was aged at 60 °C, and the α ‐Zn 3 (PO 4 ) 2 ·4H 2 O was obtained when the reaction mixture was aged at room temperature.