掺铝氧化锌粉末的制备及其催化性能研究

采用溶胶凝胶法制备掺铝氧化锌粉末,通过控制铝盐的添加量来制备不同掺杂比例的掺铝氧化锌粉末,使用XRD来测试铝是否掺杂在氧化锌的晶格中,利用SEM来反映掺铝氧化锌粉末的外观以及颗粒分布聚集情况,用激光粒度分布仪来测其颗粒大小。并用所制备的氧化锌粉末样品对甲基红和溴甲酚绿进行光催化,使其降解,通过观察降解的效果,选择最佳的掺杂比例。结果表明,铝元素是掺杂在晶体中,且掺铝摩尔比为5%,煅烧温度为500℃,煅烧时间为3 h,其降解甲基红、溴甲酚绿效率最高。

Research on Preparation and Catalytic Performance of Zinc Oxide Powder Doped with Aluminum

Zinc oxide powder doped with aluminum was prepared by the sol-gel method. Zinc oxide samples doped with different proportion aluminum were prepared through adding different amount of aluminum salt. XRD was used to test whether aluminum was doped in lattices of Zinc oxide powders. SEM was used to measure ap-pearances of zinc oxide powders doped with aluminum and reflects gatherings and distribution of particles. The laser particle analyser was used to measure sizes of particles. Zinc oxide samples degrade methyl red and bromo-cresol green by light. The best doped ratio of Zinc oxide was determined by observing degradation efficiencies of methyl red and bromocresol green. Result shows aluminum is doped in crystals. Degradation ratios of methyl red and bromocresol green are the highest efficiency ,when the mole ratio of mixed aluminum is 5%,calcination temperature is 500 ℃,and calcination time is 3 h.