人工活性膜模板制备铅钡铬酸盐纳米棒及其光学性能

利用胶棉人工活性膜模板与乙二胺的协同作用，成功制备了铬酸铅、铬酸钡纳米棒.前者直径范围为28～55 nm，最大长径比为25，结构为单斜单晶；后者直径范围为24～38 nm，最大长径比为28，结构为正交单晶.产物相对于其体材料而言，红外光谱峰值仅有少量蓝移，而紫外-可见光谱最大吸收峰则分别蓝移了30 nm和35 nm，荧光发射峰也分别蓝移了9 nm和15 nm，这均是纳米材料量子尺寸效应的体现.还对产物的形成机理作了初步探讨.

Controlled Synthesis and Photics Properties of Nanorods of PbCrO4 and BaCrO4 with Artificial Active Membrane as Template

Nanorods of lead chromate and barium chromate were synthesized by using artificial active membrane of celloidin as template and the cooperating effect of artificial active membrane with ethylenediamine. The results indicated that the diameter of lead chromate nanorods is between 28～55 nm and the largest ratio of length to diameter is 25, the nanorod exhibited a monoclinic single crystal structure. The diameter of barium chromate nanorods is between 24～38 nm and the largest ratio of length to diameter is 28. The rod had an orthorhombic single crystal structure. The products have optical properties which are different from those of bulk materials: the IR absorption peaks have slightly blue-shift, the fluorescent emission peaks have 9 nm and 15 nm blue-shift respectively compared to those of the bulk materials, and the UV-Vis spectra showed that the obvious absorption peaks respectively blue-shifted 30 nm and 35 nm compared to bulk that of materials as a result of quantum size effect. The synthesis mechanism of the products was discussed primarily.