A novel ZnWO₄/MgWO₄ n-n heterojunction (0.9% ZnWO₄/MgWO₄) was fabricated successfully and characterized by different techniques. The methylene blue (MB) was removed to confirm the sonocatalytic activity by the 0.9% ZnWO₄/MgWO₄ composite. The sonocatalytic removal ratio of MB using MgWO₄ was 40.04±4.34(%). It was significantly increased to 93.82±3.44(%) in the presence of 0.9% ZnWO₄/MgWO₄ composite. The significantly improved sonocatalytic performance was due to the form of n-n heterojunction, which could hinder the recombination of electron and hole (e⁻-h⁺) pairs effectively. The mechanism showed that hydroxyl radical (•OH) and h⁺ had important roles for the elimination of MB. Moreover, the 0.9% ZnWO₄/MgWO₄ composite had remarkable stability during the process of MB removal under the ultrasonic irradiation. The results suggested that the fabrication of heterojunction is a valid method to promote the sonocatalytic performance of catalyst. The results of this paper would provide valuable references for the development of new sonocatalysts used in environmental remediation.

成功制备了一种新型ZnWO ₄ /MgWO ₄ nn 异质结（0.9% ZnWO ₄ /MgWO ₄），并通过不同的技术对其进行了表征。去除亚甲蓝(MB)以确认0.9% ZnWO ₄ /MgWO ₄复合材料的声催化活性。_{使用MgWO 4}对MB的声催化去除率为40.04±4.34(%)。_{在0.9% ZnWO 4} /MgWO ₄复合材料的存在下，它显着增加到93.82±3.44(%) 。显着提高的声催化性能是由于 nn 异质结的形式，这可能阻碍电子和空穴的复合 ( e ^- - h⁺ ) 有效配对。机理表明羟基自由基(•OH)和h ⁺对MB的消除具有重要作用。此外，0.9% ZnWO ₄ /MgWO ₄复合材料在超声波照射下去除MB的过程中具有显着的稳定性。结果表明，异质结的制备是提高催化剂声催化性能的有效方法。本文的研究结果将为开发用于环境修复的新型声催化剂提供有价值的参考。