以蔗糖为燃料、硝酸锌为氧化剂/锌源,采用溶液燃烧法合成ZnO超细粉体.采用XRD、SEM、比表面分析仪和分光光度计等检测设备,研究了点燃温度对合成ZnO粉体的物相组成、微观形貌、比表面积和光催化等性能影响,探讨了合成ZnO粉体对甲基橙光催化的作用机理.结果表明:在点燃温度400～ 700℃,均可合成棒状的ZnO超细粉体、平均径向尺寸小于150 nm；合成ZnO粉体均具有较高光催化性能,并且在点燃温度为500℃时,合成的ZnO粉体具有最大的比表面积(24.83 m2/g)和最佳的光催化性能,在高压汞灯照射60 min条件下,对甲基橙溶液(10 mg/L)的降解率可达98.2％,且反应符合一级动力学规律.
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