The hydrothermally prepared two-dimensional copper selenide nanosheets (2D CuSe NSs) have been employed for the first time to degrade rhodamine B (RhB) in the presence of hydrogen peroxide (H₂O₂) under ultraviolet to near-infrared (NIR) light irradiation and dark condition. The experimental measurements demonstrate that 99.7% RhB is degraded under NIR light irradiation for 120 min. Moreover, the experimental tests clearly demonstrate that the 2D CuSe NSs display excellent ability to degrade RhB under dark condition. The different degradation mechanisms under the light irradiation and dark condition have been revealed by the experimental tests through the investigation of H₂O₂ role and the evaluation of hydroxyl radicals (•OH) and H₂O₂ concentration during the degradation reaction. Under light irradiation, the H₂O₂ traps the photogenerated electrons of the CuSe to generate •OH and hydroxide ion (OH⁻), and the holes react with OH⁻ to produce •OH, making RhB to be degraded efficiently. Under dark conduction, the 2D CuSe NSs react with H₂O₂ to exhibit Fenton-like process to degrade RhB with a degradation rate of 90.0% within 120 min. This work opens a pathway for developing nanostructures with full-solar-responsive and strong near-infrared photocatalytic activity as well as Fenton-like reaction to efficiently degrade pollutants under light irradiation and dark condition.

水热法制备的二维硒化铜纳米片 (2D CuSe NSs) 首次用于在紫外至近红外 (NIR) 光下在过氧化氢 (H ₂ O ₂ ) 存在下降解罗丹明 B (RhB)辐照和黑暗条件。实验测量表明，99.7% RhB 在近红外光照射下 120 分钟降解。此外，实验测试清楚地表明，2D CuSe NSs 在黑暗条件下表现出优异的降解 RhB 的能力。_{通过对H 2} O ₂作用的研究和对羟基自由基(•OH)和H的评价，实验揭示了光照和黑暗条件下不同的降解机制。_{降解反应过程中的2} O ₂浓度。在光照下，H ₂ O ₂捕获CuSe的光生电子，生成•OH和氢氧根离子(OH ^- )，空穴与OH ^-反应生成•OH，使RhB高效降解。在暗导下，2D CuSe NSs与H ₂ O ₂反应表现出类Fenton过程降解RhB，120分钟内降解率为90.0%。这项工作为开发具有全太阳能响应性和强近红外光催化活性以及类芬顿反应的纳米结构开辟了一条途径，以在光照和黑暗条件下有效降解污染物。