【摘要】 研究不同分层体系结构钨酸铋对可见光催化降解诺氟沙星的影响。在pH值为4~11条件下采用水热法反应合成钨酸铋。结果表明:在pH值为4条件下制备的钨酸铋对诺氟沙星具有很好的吸附和光催化性能。表征结果显示,pH值为4时制备的钨酸铋具有较大的比表面积和光生载流子分离效率。在弱碱条件下,催化降解速率达到最大,这是由于弱碱溶液提供了足量的OH~-,光子与材料表面吸附的OH~-反应生成了羟基自由基。本实验证明,较小尺寸的超薄钨酸铋是一种有效的诺氟星沙污染水体光催化剂。更多还原

【Abstract】 The photocatalytic degradation of norfloxacin by bismuth tungstate（Bi₂WO₆） with different hierarchical architectures was investigated under visible light irradiation.Bi₂WO₆ was prepared by hydrothermal method with the reaction solution pH ranging from 4 to11.The relatively ultrathin Bi₂WO₆ nanoflakes prepared at pH 4 showed excellent adsorption and photodegradation efficiency towards norfloxacin.The characterization results showed that Bi₂WO₆ prepared at pH 4 had a larger specific area and faster photo-generated carrier separation rate.The decay rate reached the maximum in weak alkaline reaction solution,which could be attributed to the presence of moderate OH-anions.The present study demonstrated that the smaller size of Bi₂WO₆ could be an efficient photocatalyst on the degradation of norfloxacin in the aquatic environment.更多还原