钨酸镁催化超声降解金橙Ⅱ研究

Investigation of the sonocatalytic Degradation of Orange Ⅱ in the Presence of Magnesium Tungstate

采用水热法合成了钨酸镁(MgWO_(4))半导体催化剂,并使用金橙Ⅱ为有机污染物模型研究了其声催化降解性能。结果表明:MgWO_(4)具有良好的声催化活性,可显著提升超声对有机污染物的降解效果,而且MgWO_(4)具有优秀的可重复利用性能。同时,MgWO_(4)催化超声降解金橙II的机理研究表明,产生的活性物质如羟自由基(·OH)、超氧阴离子自由基(·O_(2)^(-))和空穴(h^(+))是声催化降解金橙Ⅱ的主要原因。以上研究结果表明MgWO_(4)作为声催化剂用于处理有机染料废水具有良好的应用前景。

Magnesium tungstate(MgWO_(4)) semiconductor catalyst was synthesized by hydrothermal method and its sonocatalytic degradation performance was studied using Orange Ⅱ as an organic pollutant model. The results showed that MgWO_(4) had good sonocatalytic activity, which could significantly improve the sonocatalytic degradation efficiency of organic pollutants. Moreover, MgWO_(4) had excellent reusable performance. In addition, the investigation of the mechanism of sonocatalytic degradation of Orange Ⅱ in the presence of MgWO_(4) showed that the generation of active substances such as hydroxyl radical(·OH), superoxide anion radical(·O_(2)^(-)) and hole(h^(+)) were the main reasons for the sonocatalytic degradation of Orange Ⅱ. The above research results indicated that MgWO_(4) as a sonocatalyst for the treatment of organic dye wastewater had a good application prospect.