Gd₂O₃ nanoparticles modified g-C₃N₄ photocatalytic composites were synthesized by a simple one-step hydrothermal method. The structure, morphology, optical properties of the prepared photocatalyst were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM) and X-ray photoelectron spectroscopy (XPS). The result demonstrates that gadolinium is mainly dispersed on the surface of g-C₃N₄ in the form of Gd₂O₃, and does not destroy the lattice structure of g-C₃N₄. Besides, the gadolinium can cause the red shift of the absorption edge of light, narrow the band gap, and increase the separation efficiency of the photogenerated electron and hole of g-C₃N₄. Especially, the specific surface area of g-C₃N₄ can be significantly increased. Furthermore, g-C₃N₄/Gd-0.05 displays the highest photodegradation performance when it is used for degradation of methyl orange (MO), methylene blue (MB) and Rhodamine B (RhB). The photodegradation rate of g-C₃N₄/Gd-0.05 composites is 72.4% for MO, 95.5% for RhB, 100% for MB after 120 min under visible light (λ > 420 nm) irradiation. Narrow band gap promotes the separation of photogenerated electron and hole, which enhances the photocatalytic activity of g-C₃N₄. It is noted that g-C₃N₄/Gd-0.05 exhibits excellent photocatalytic stability by the photocurrent and the cyclic photodegradation of MO.

通过简单的一步水热法合成了Gd ₂ O ₃纳米颗粒修饰的gC ₃ N ₄光催化复合材料。通过X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、场发射透射电子显微镜(FETEM)和X射线光电子能谱(XPS)对制备的光催化剂的结构、形貌、光学性质进行了表征。结果表明，钆主要以Gd ₂ O ₃的形式分散在gC ₃ N ₄的表面，不破坏gC ₃ N ₄的晶格结构。. 此外，钆能引起光吸收边红移，缩小带隙，提高gC ₃ N ₄光生电子与空穴的分离效率。特别是，可以显着增加gC ₃ N ₄的比表面积。此外，gC ₃ N ₄ /Gd-0.05 用于降解甲基橙（MO）、亚甲蓝（MB）和罗丹明B（RhB）时显示出最高的光降解性能。gC ₃ N ₄ /Gd-0.05 复合材料在可见光 ( λ > 420 nm) 照射。窄带隙促进了光​​生电子和空穴的分离，从而增强了gC ₃ N ₄的光催化活性。值得注意的是，gC ₃ N ₄ /Gd-0.05 通过光电流和 MO 的循环光降解表现出优异的光催化稳定性。