微波辅助均匀沉淀法制备磷酸银及其光催化性能研究

摘要

采用微波辅助均匀沉淀法制备磷酸银(Ag3PO4),通过 XRD、FTIR、SEM、UV-Vis 和 PL 等对其进行表征,并考察了其在可见光下催化降解水相中有机染料亚甲基蓝(MB)和清除气相中氮氧化物(NOx)的性能.结果表明,制备的立方晶型四足状 Ag3PO4对可见光的吸收利用好、光生电子-空穴对复合几率小,其在可见光下催化降解 MB 和清除NOx的活性均比水相直接沉淀法制备的 Ag3PO4高.%We prepared silver phosphate(Ag3PO4)by a microwave-assisted homogeneous precipitation method,and characterized its structure by XRD,FTIR,SEM,UV-Vis,and PL.Moreover,we investigated the performance of silver phosphate in degrading organic dyestuff methylene blue(MB)in aqueous media under visi-ble light and the performance of silver phosphate in removing nitrogen oxide(NOx)in gas phase.The results in-dicate that the prepared silver phosphate tetrapods with cubic crystal form possess a property of strong absorp-tion and make good use of visible light,and have small recombination rate of photoelectron-hole pair.Silver phosphate tetrapods have a higher photocatalytic activity of degrading methylene blue and removing nitrogen oxide under the visible light than those of silver phosphate prepared by a direct precipitation method.