β-PbO_2纳米棒及Pb_3O_4纳米晶的制备与表征  

Synthesis and Characterization of β-PbO_2 Nanorods and Pb_3O_4 Nanocrystallites

作　　者：庄京[1] 邓兆祥[1] 梁家和[1] 李亚栋[1] 

机构地区：[1]清华大学化学系,北京100084

出　　处：《高等学校化学学报》2002年第7期1223-1226,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 0 2 5 10 2 )

摘　　要：利用 Na Cl O在碱性溶液中与 Pb(Ac) 2 进行氧化反应直接合成出直径为 1 0～ 2 0 nm、长度为 40 0 nm、长径比达 2 0以上的纯相 β-Pb O2 纳米棒 .对所得 β-Pb O2 在 42 0℃下进行热解 ,得到晶粒尺寸为 2 0 nm左右的 Pb3O4 .对液相氧化反应的温度、时间、氧化剂浓度、p H等因素的影响进行了详细研究 ,获得了最佳合成反应条件 .所得产物利用粉末 X射线衍射和透射电子显微镜分析进行了表征 .Phase pure β PbO 2 nanorods with diameter of 10-20 nm and length up to 400 nm with an aspect ratio >20 were synthesized through direct oxidation of Pb(Ac) 2 by NaClO under alkaline conditions. The obtained β PbO 2 nanorods were then decomposed at 420 ℃ to produce Pb 3O 4 nanocrystals with crystallite size ~20 nm. The reaction conditions were optimized on the basis of detailed investigations of the influences of reaction temperature, time, concentraion of NaClO, and pH on the products. Powder X ray diffraction(XRD) and transmission electron microscope were employed for the characterization of the structure, compositions and morphology of the obtained nanocrystalline products.

关 键 词：制备 表征 纳米棒 纳米晶 β-PbO2 Pb3O4 β-二氧化铅 四氧化三铅 

分 类 号：O614.433[理学—无机化学] TB383[理学—化学]