水热法制备ZnSe粉体影响因素的研究

THE EFFECT OF HYDROTHERMAL CONDITIONS ON THE ZnSe POWDERS PREPARED BY HYDROTHERM AL METHOD

本研究以Zn和Se为源物质,NaOH水溶液为反应介质,采用水热法在100～200℃下水热反应12～36h制备了ZnSe粉体.采用正交试验方法,研究了各水热工艺条件对所制备ZnSe粉体粒径影响的显著性.采用XRD、XPS、EDAX和SEM等方法测试了所制备样品的相结构、表面元素状态、化学组成以及表面形貌,并研究了粉体的光学吸收特性.研究结果表明,所制备的粉体为立方闪锌矿型ZnSe,所制备的ZnSe粉体对紫外区的光呈现明显吸收,其光吸收边为454.0～458.3nm,并随晶粒尺寸的减小而呈现'蓝移'.

In this work, ZnSe powders were prepared at 100~200℃ for 12~36h by hydrothermal method with Zn and Se dissolved in NaOH aqueous solution as source materials. T he orthogonal experiment design was used and the effects of processing parameter s on the grain size of the ZnSe powders were studied. XRD, EDAX, XPS and SEM wer e used to characterize the structure, composition and morphology of the samples. Optical absorption spectra of the ZnSe powders were measured. The powders were cubic blende ZnSe, and showed traditional absorption for the UV light. The absor ption edge of the samples was 454.0~458.3nm, and shifted to higher energies due to the quantum confinement effects induced by the decrease of the grain size of the ZnSe.