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为改善UiO-66对可见光利用率低以及CdS易于光腐蚀的问题，通过简单溶剂热法成功将缺陷化UiO-66与六方相CdS纳米球复合，制备了n-n异质结光催化剂即缺陷化UiO-66@CdS(UC)。采用SEM、TEM/HRTEM、XRD、XPS等方法对复合材料的形貌结构进行表征，对其光电性能进行测试；采用该催化剂对亚甲基蓝(MB)进行光催化降解，并分析其降解机理。结果表明：复合材料UC的光电性能远远优于UiO-66和CdS,n-n异质结的构建有效抑制了光生载流子的复合，并加速了迁移速率，使得材料的光催化活性大大提升，空穴(h+)在催化反应中起关键作用；缺陷化UiO-66@CdS催化剂在140 min对MB的降解率达到99.63%，降解速率分别是UiO-66和CdS的4.23和3.33倍。
Abstract：In order to improve the problems of low visible light utilization of UiO-66 and easy photocorrosion of CdS, the defective UiO-66 was successfully combined with hexagonal phase CdS nanospheres by a simple solvothermal method, forming an n-n heterojunction photocatalyst, namely defective UiO-66@CdS. The morphology and structure of the composite were characterized by methods including SEM, TEM/HRTEM, XRD, and XPS, and its photoelectric properties were tested. Meanwhile, the composite was used as a catalyst for the photocatalytic degradation of methylene blue(MB), and the corresponding degradation mechanism was analyzed. The results showed that the photoelectric performance of the composite UC was far better than that of UiO-66 and CdS, and the construction of n-n heterojunction effectively suppressed the recombination of photogenerated carriers and accelerates the migration rate, which greatly improved the photocatalytic activity of the material. h~+plays a key role in the catalytic reaction. The defective UiO-66@CdS catalyst achieved a degradation rate of 99.63% for MB within 140 minutes, and its degradation rate was 4.23 and 3.33 times that of pure UiO-66 and CdS, respectively.
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基本信息:
中图分类号:O644.1;O643.36;X703
引用信息:
[1]许世超,肖欢欢,杨杰,等.缺陷化UiO-66@CdS催化剂制备及其可见光降解MB[J].天津工业大学学报,2025,44(06):40-47.
基金信息:
国家自然科学基金项目（51772208、51678409）
2025-12-25
2025-12-25