【摘要】 用水热法于175℃合成了铅笔状ZnO。并通过XRD、EDS、SEM、TEM和HRTEM对不同碱性条件下合成的ZnO的形貌进行了分析,结果表明,n(OH-)∶n(Zn2+)=4∶1时,ZnO的形貌为平均厚度90nm的片状结构;当n(OH-)∶n(Zn2+)=10∶1时,ZnO的形貌为直径200nm、长度2.5μm的铅笔状结构。探讨了不同形貌的ZnO的形成机理。用UV-vis吸收光谱和PL光谱分析了ZnO的形貌对次甲基蓝光催化降解的影响,结果发现,铅笔状氧化锌的光催化性能优于片状氧化锌。更多还原

【Abstract】 Pencil-like ZnO was synthesized by hydrothermal method at 175 ℃.Analysis of the morphology of ZnO synthesized under different alkali conditions was carried out with XRD,EDS,SEM,TEM and HRTEM.The result showed that ZnO nanosheets with average thickness of 90 nm were obtained under n(OH-)∶n(Zn2+)=4∶1,and that pencil-like ZnO 200 nm in diameter and 2.5 μm in length could be got under n(OH-)∶n(Zn2+)=10∶1.The growth mechanism of ZnO with different morphologies was discussed.Effect of ZnO with different morphologies on the photocatalytic degradation of methylene blue was studied by UV-vis spectra and PL spectra.It is found that pencil-like ZnO possesses stronger photocatalytic ability than sheet-shaped ZnO.更多还原