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以过硫酸铵和硫酸锰为原料,采用水热法制备出不同晶型和形貌的MnO2,并采用X射线衍射仪、场发射扫描电子显微镜、透射电子显微镜和综合热分析仪等仪器对其进行表征。结果表明,采用合适的水热反应温度和时间可制备具有核壳结构的MnO2空心球,并发现该空心球主要由β-MnO2纳米棒构成。此外还探究了该纳米β-MnO2空心球在催化过氧化氢降解亚甲基蓝过程中的催化性能。
Ammonium persulfate and manganese sulfate were used as raw materials to prepare MnO2 with different crystalline forms and morphologies by hydrothermal method and characterized by X-ray diffractometry, field emission scanning electron microscopy, transmission electron microscopy and comprehensive thermal analysis Characterization. The results show that hollow core MnO2 hollow core with core-shell structure can be prepared by suitable hydrothermal reaction temperature and time, and the hollow sphere is mainly composed of β-MnO2 nanorods. In addition, the catalytic performance of the nano-β-MnO2 hollow sphere in the catalytic hydrogen peroxide degradation of methylene blue was also explored.