静电纺丝法制备CeO_(2)/CuCrO_(2)纳米线及其微结构与光学特性分析

Preparation of CeO_(2)/CuCrO_(2) Nano-wire by Electro-spinning Method and its Crystal Structure,Microstructure amd Optical Property Analysis

本文采用静电纺丝法制备了CeO_(2)/CuCrO_(2)纳米线,采用XRD、SEM、TEM、EDS及UV-Vis等手段分析了其微结构与光学特性。微结构分析表明,所有样品中都只有CeO_(2)与CuCrO_(2)两种目标相,材料表面呈纤维状结构,直径为70~90 nm,纤维表面的晶粒尺寸皆控制在24nm以内,表明采用静电纺丝法能够成功制备出具有小晶粒的CeO_(2)/CuCrO_(2)纳米线。光学特性分析表明,在可见光范围内样品的吸收度随着CeO_(2)/CuCrO_(2)摩尔比的减小而逐渐变大,即CuCrO_(2)占比越多的纳米线其光学吸收性越好,光学能隙约在2.95~2.98eV之间。

CeO_(2)/CuCrO_(2) nano-wire was prepared by electro-spinning method and then their microstructure and optical property were analyzed by XRD,SEM,TEM,EDS,and UV-Vis in this paper.Micro-structural analysis showed that all samples contained only two target phases CeO_(2) and CuCrO_(2),and their surfaces exhibited a fibrous structure with a diameter range of 70~90 nm.The grain size on the fiber surface was controlled within 24nm,indicated that CeO_(2)/CuCrO_(2) nano-wire with small grains could be successfully prepared by electro-spinning method.Optical characteristic analysis showed that the absorbance of the sample gradually increased with the decrease of CeO_(2)/CuCrO_(2) molar-ratio in the visible light range.The nano-wire with more CuCrO_(2) had better optical absorption,and the optical band-gap was about 2.95~2.98 eV.