CeO₂/g-C₃N₄ photocatalysts have attracted tremendous attention in the photocatalytic degradation of organic pollutants. The design and construction of highly active CeO₂/g-C₃N₄ photocatalysts without harsh conditions are still challenging. Herein, highly dispersed CeO_2–x nanoparticles with rich oxygen vacancies were successfully precipitated on the surface of g-C₃N₄ under mild conditions. The fabricated CeO_2–x/g-C₃N₄ exhibits remarkable activity and stability for photocatalytic degradation of MO pollutant. The optimal rate constant of MO degradation over CeO_2–x/g-C₃N₄ is about 0.031 min⁻¹, which is three times higher than that of g-C₃N₄. A negligible activity decrease is observed after three cycling runs. The enhanced catalytic performance can be ascribed to the excellent dispersion of CeO_2–x with rich oxygen vacancies that benefit O₂ adsorption and visible light absorption. In addition, the proper band alignment between CeO_2–x and g-C₃N₄ is conducive to the highly efficient separation of photogenerated electron–hole pairs.

CeO ₂ /gC ₃ N ₄光催化剂在光催化降解有机污染物方面引起了极大的关注。_{没有苛刻条件的高活性CeO 2} /gC ₃ N ₄光催化剂的设计和构建仍然具有挑战性。在此，具有丰富氧空位的高度分散的CeO _{2- x}纳米粒子在温和条件下成功地沉淀在gC ₃ N _{4的表面上。}制备的CeO _{2– x} /gC ₃ N ₄对MO污染物的光催化降解具有显着的活性和稳定性。_{在CeO 2- x} /gC ₃ N ₄上MO降解的最佳速率常数约为0.031 min ^{-1 ，是gC} ₃ N ₄的三倍。在三个循环运行后观察到可忽略不计的活动减少。增强的催化性能可归因于具有丰富氧空位的 CeO _{2- x的出色分散，有利于 O 2}吸附和可见光吸收。此外，CeO _{2– x}和 gC ₃ N _{4之间的正确能带排列}有利于光生电子-空穴对的高效分离。