solid base catalyst;  aluminum nitride phosphate;  preparation;  Structural features

Amorphous aluminum phosphate was reacted with ammonia at 800°C to prepare aluminum nitride with solid base catalysts with different nitrogen content, and the products were characterized by chemical analysis, specific surface determination (BET), Fourier infrared spectroscopy (FTIR) and photoelectron spectroscopy (XPS). The results show that the nitriding product retains the high specific surface of the aluminum phosphate precursor, and there are P-NH2 groups and P-NH-Al groups in the high-temperature nitriding process, and the P-NH2 group is easier to generate than the P-NH-Al group, and with the increase of nitrogen content, the proportion of P-NH-Al group increases, and there is obvious phosphorus loss in the nitriding process. Chemical analysis showed that nitrogen was uniformly distributed in the bulk phase of the sample.