DyCrO₃/\(r\)-GO (DCO/\(r\)-GO) and Dy_0.5Ho_0.5CrO₃/\(r\)-GO (DHCO/\(r\)-GO) nanocomposites consisting of 5 wt.% \(r\)-GO were synthesized by the sol–gel method, and their photocatalytic performance was studied on methylene blue (MB) and rhodamine B (RhB) dyes under solar irradiation. The bandgap energy of DCO/\(r\)-GO and DHCO/\(r\)-GO nanocomposites was found to be 2.63 eV and 2.58 eV, respectively. The DCO/\(r\)-GO and DHCO/\(r\)-GO nanocomposites demonstrated remarkably higher photocatalytic activity than DCO and DHCO nanoparticles. The DCO/\(r\)-GO and DHCO/\(r\)-GO nanocomposites furnished 69.6% and 71.6% degradation of the MB dye and 87% and 96% degradation of RhB dye within 180 min under direct sunlight.

DyCrO ₃ / \(r\) -GO (DCO/ \(r\) - GO) 和 Dy _0.5 Ho _0.5 CrO ₃ / \(r\) -GO (DHCO/ \(r\) -GO) 纳米复合材料组成采用溶胶-凝胶法合成了5 wt.% \(r\) -GO，并研究了它们在太阳辐射下对亚甲基蓝（MB）和罗丹明B（RhB）染料的光催化性能。DCO/ \(r\) - GO 和 DHCO/ \(r\) -GO 纳米复合材料的带隙能分别为 2.63 eV 和 2.58 eV。DCO/ \(r\) -GO 和 DHCO/ \(r\) - GO 纳米复合材料表现出比 DCO 和 DHCO 纳米颗粒更高的光催化活性。DCO/ \(r\) -GO 和 DHCO/ \(r\) -GO 纳米复合材料在阳光直射下 180 分钟内 MB 染料降解率分别为 69.6% 和 71.6%，RhB 染料降解率分别为 87% 和 96%。