This work demonstrates the application of crystalline Nb₂O₅ powders with different phases as photocatalysts in the degradation of Rhodamine B (RhB). The crystalline structure and the corresponding surface area of Nb₂O₅ changed with an increase in the heat-treatment temperature, leading to different photocatalytic activities. Thus, for Nb₂O₅ with low crystallinity, the total degradation of RhB on pseudohexagonal Nb₂O₅ is 97%, whereas that on orthorhombic Nb₂O₅ is 57%. The degradation products of RhB were identified from the results of high-performance liquid chromatography, mass spectrometry, and total organic content analysis, and the possible photocatalytic degradation pathways are proposed.

这项工作证明了具有不同相的结晶Nb ₂ O ₅粉末作为光催化剂在罗丹明B（RhB）降解中的应用。Nb ₂ O ₅的晶体结构和相应的表面积随热处理温度的升高而变化，从而导致不同的光催化活性。因此，Nb的₂ ö ₅具有低结晶度，罗丹明B上伪六边形的Nb的总降解₂ ö ₅是97％，而上斜方晶的Nb ₂ ö ₅是57％。从高效液相色谱，质谱和总有机物含量分析结果确定了RhB的降解产物，并提出了可能的光催化降解途径。