Preparation of NH_4ZrH(PO_4)_2·H_2O via solid-state reaction at low heat and its catalytic performance in the synthesis of butyl acetate

摘要

Nanocrystalline NH4ZrH(PO4)2·H2O was obtained by grinding ZrOCl2·8H2O and (NH4)2HPO4 in the presence of surfactant PEG-400 via solid-state reaction at room temperature. The product NH4ZrH(PO4)2·H2O and its product of thermal decomposition were characterized using thermogravimetry and differential thermal analyses (TG/DTA), Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), and transmission electron microscopy (TEM). Nanocrystalline NH4ZrH(PO4)2·H2O with an average particle size of 17 nm was obtained when the product was kept at 80°C for 3 h. Its crystalline framework was stable at temperatures below 250°C. In addition, the catalytic performance of NH4ZrH(PO4)2·H2O in the synthesis of butyl acetate was investigated. The results show that NH4ZrH(PO4)2·H2O behaved as an excellent heterogeneous catalyst in the synthesis of butyl acetate.