【摘要】 采用均匀沉淀-煅烧法制备纳米PbO,利用氮气吸附等温线(BET)、X射线衍射(XRD)和透射电镜(TEM)对其进行表征;MEDUSA软件模拟Pb-O-H2O体系中不同组分的分布情况;用酸碱滴定技术考察纳米PbO表面的酸碱性质。结果表明,所制PbO样品的粒径在80 nm左右,其悬浮液的缓冲能力随着PbO加入量的增多明显增强,样品表面在水溶液中有非常明显的酸碱性质。经Zeta电位测定氧化铅零电点出现时,pH=9.8。更多还原

【Abstract】 PbO nanoparticles were achieved by homogeneous precipitation-calcination method and characterized using nitrogen adsorption isotherms,X-ray diffraction and transmission electron microscope.The distribution of different components in Pb-O-H2O system was simulated by using MEDUSA software;the acid-base properties and zeta potential of PbO nanoparticles were studied.The testing results show that the particle size of synthesized PbO is about 80 nm;the surface of PbO possesses obvious acid-base property;with increasing the amount of PbO in the suspension,the pH buffer capacity of solution increases dramatically.The zero-point charge of PbO is determined to be at pH=9.8.更多还原