中文摘要：

通过简单的水热法并在不使用表面活性剂的情况下成功地合成了α-MnO2纳米线,采用XRD和扫描电子显微镜研究了MnO2的晶相、成分和形貌,初步研究了反应温度对纳米结构MnO2合成的影响,对MnO2降解亚甲基蓝催化性能进行了测试。结果表明,α-MnO2纳米颗粒和纳米线的合成是可控的,α-MnO2纳米结构的尺寸和形貌对催化降解亚甲基蓝有较大的影响,其中150℃所得的α-MnO2纳米线,其直径约为20～30nm,降解效果最佳,180min可降解91%。

英文摘要：

The α-MnO2 nanowires were successfully synthesized by a simple hydrothermal method without using any surfactants.The samples were characterized by XRD and SEM to study their phase,composition and morphology.The influence of reaction temperature were studied.Catalytic properties of the MnO2 nanowires on degradation of methylene blue were also tested.The results indicate that α-MnO2 nanoparticles and nanowires and could be synthesized controllably.The size and morphologies of synthesized α-MnO2 nanostructure affect their catalytic degradation properties on Metlylene blue,the nanowires with 20-30nm diameter synthesized at 150℃ show best catalytic performance by which 91% metlylene could be degraded after 180min.