PW11Fe/聚苯胺/SnO2复合催化剂对孔雀石绿的光降解性能研究

Photodegradation Performance of Malachite Green by Composite Catalyst PW11Fe/Polyaniline/SnO2

以铁元素取代钨磷酸盐为活性组分,制备了PW11Fe/PANI/SnO2三元复合催化剂,采用IR、UV、XRD、XPS和SEM表征了其结构,并通过测试孔雀石绿的光催化降解效果来评价PW11Fe/PANI/SnO2的光催化性能。结果表明,经过30 W的紫外灯照射,调至pH 2、孔雀石绿染料的浓度为5 mg/L,加入50 mg/L PW11Fe/PANI/SnO2,在200 min光照降解下,降解率可达92.65%。PW11Fe/PANI/SnO2光催化降解孔雀石绿过程符合准一级动力学反应,该一级方程反应速率常数为0.007 78 min^-1。

With iron substituted heteropolytungstenphosphate asactive components composite catalyst PW11 Fe/PANI/SnO2 was prepared and characterized by IR,UV,XRD,XPS and SEM. The photocatalytic degradation of malachitegreen was selected as probe to evaluate the enhanced photocatalytic activity of the as-synthesized PW11 Fe/PANI/SnO2. The degradation rate of malachitegreen achieved 92. 65% when 5 mg/L of malachitegreen containing simulated solution at pH 2 was treated by 30 W ultraviolet light for 200 min with 50 mg/L of PW11 Fe/PANI/SnO2 as catalyst.The kinetics of the photodegradation of malachitegreen fitted by the pseudo-first-order equationwith a constant at 0. 007 78 min^-1.