As an effective treatment method for uranium removal in wastewater, the application of photocatalytic reduction has attracted extensive attention. To improve the optical performance of Nb₂O₅, CdS nanoparticles were introduced via a one-step hydrothermal method. Then the characterization by various methods (e.g. XRD, SEM, TEM, XPS and UV–vis DRS) were used to determine the structural and optical properties of the heterojunction of Nb₂O₅ nanorod/CdS nanoparticles (NC). It clearly confirmed that the successful construction of the heterojunction widened the visible light absorption range, narrowed bandgap (∼2.11 eV), promoted the charge transfer and enhanced the separation efficiency of photoinduced electron-hole pairs and further improved the photoreduction activity. During the photocatalytic degradation process, the results showed the photocatalyst with the Nb/Cd molar ratio of 1/3 (NC-3) displayed the best removal of U(VI), with a removal efficiency of 97% in 90 min adsorption and 150 min visible light irradiation at the pH=6. The NC-3 photocatalyst was relatively stable and exhibited good recyclability in during the cyclic experiments. In the end, it was proposed that e^- and •O₂⁻ radicals played important roles in the process of the reduction of U(VI).

光催化还原作为一种有效的废水脱铀处理方法，受到广泛关注。为了提高Nb ₂ O ₅的光学性能，通过一步水热法引入CdS纳米颗粒。然后通过各种方法（例如 XRD、SEM、TEM、XPS 和 UV-vis DRS）进行表征，以确定 Nb ₂ O _{5异质结的结构和光学性质}纳米棒/CdS 纳米粒子 (NC)。清楚地证实，异质结的成功构建拓宽了可见光吸收范围，缩小了带隙（~2.11 eV），促进了电荷转移，提高了光生电子-空穴对的分离效率，进一步提高了光还原活性。结果表明，在光催化降解过程中，Nb/Cd 摩尔比为 1/3 的光催化剂（NC-3）对 U(VI) 的去除效果最好，90 min 吸附去除效率为 97%，150在 pH = 6 下最小可见光照射。NC-3光催化剂相对稳定，在循环实验中表现出良好的可回收性。最后，提出了 e ^-和 •O ₂ ^-自由基在 U(VI) 的还原过程中发挥了重要作用。