用化学共沉淀法制备了镧和锌掺杂的铌酸铋纳米颗粒,表征了制备样品的微观结构和光催化降解性能。结果表明制备的样品对RhB表现出良好的可见光催化降解活性,且光催化效果受各种因素的影响。其中,Bi_(0.96)La_(0.04)NbO_4用量为0.15 g时,对pH=4、50 m L浓度为5 mg·L-1 RhB溶液的光催化效果最佳。光催化机理研究表明催化剂在可见光照射下产生的电子空穴对Rh B的降解起主要作用。该催化剂的制备方法简单、光催化性能稳定,5次循环后的活性仍大于95%。
【英文摘要】
Niobate bismuth nanoparticles doped with La and Zn had been prepared by chemical co-precipitation method, and its structure and photocatalytic property were characterized by means of modern analytical techniques. The results illustrated that the doped BiNbO_4 samples presented an excellent photocatalytic activity on Rh B in visible light irradiation, and their photocatalytic efficiency influenced by various factors, 0.15 g of Bi_(0.96)La_(0.04)NbO_4 had the best photocatalytic effect on 50 m L of Rh B solut...
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