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以氯化锌为锌源,三乙胺(TEA)为碱源和晶体生长控制剂,在160℃下采用水热法可控合成了不同形貌的纳米氧化锌(ZnO)。使用X射线粉末衍射仪(XRD)、透射电镜(TEM)、傅里叶红外光谱仪(FT-IR)、紫外-可见分光光度计(UV-Vis)和比表面积分析仪(BET)对ZnO样品的晶型、颗粒形貌、比表面积以及光学性质进行了表征。研究发现,三乙胺的浓度的增加使得ZnO的形貌从棒状变为颗粒状,同时ZnO的尺寸也变小,表明三乙胺的加入抑制了ZnO结晶在C轴的生长;颗粒状的纳米ZnO的光催化性能最好,光照50min时,其对亚甲基蓝染料的降解率达到98%。
Zinc chloride as a zinc source, triethylamine (TEA) as a source of alkali and crystal growth control agent, at 160 ℃ hydrothermal method can be controlled synthesis of different morphologies of nano zinc oxide (ZnO). The ZnO samples were characterized using X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis and BET Crystal shape, particle morphology, specific surface area and optical properties were characterized. The results showed that the increase of triethylamine concentration changed the shape of ZnO from rod to granular and the size of ZnO decreased, which indicated that the addition of triethylamine inhibited the growth of ZnO crystal in the C-axis. The photocatalytic activity of ZnO was the best, and the degradation rate of methylene blue dye reached 98% when exposed to light for 50 min.