The bifunctional photocatalyst CDs@NH₂-MIL-125(Ti), carbon nanodots (CDs) encapsulated in NH₂-MIL-125(Ti), was constructed in situ by a simple and convenient low-temperature calcination approach, which exhibited great capacity in NO removal (at air level) and H₂ evolution simultaneously under visible-light irradiation. The NO removal rate of CDs@NH₂-MIL-125(Ti) (10 mM) reached 53%, which was 28.4% higher than pristine NH₂-MIL-125(Ti). Moreover, the H₂ production rate was 5820.95 μmol g⁻¹, which was 5.34 times higher than that of original NH₂-MIL-125(Ti). The corresponding optical and electrical performances of CDs@NH₂-MIL-125(Ti) characterized by UV–Vis, UCPL, ESR, and in situ DRIFTS, etc. indicated that the encapsulated CDs uniformly dispersed in the pores of NH₂-MIL-125(Ti) could improve the visible light utilization via the up-conversion effect and photosensitization, and serve as an electron-receiver to significantly prolong the lifetime of the photogenerated charge carriers, thus enhancing the photocatalytic performance. The results revealed that fabricating CDs with metal-organic frameworks (MOFs) could be an available strategy for us to boost the photocatalytic NO elimination and H₂ evolution activity simultaneously.

双功能光催化剂CDs @ NH ₂ -MIL-125（Ti），即包裹在NH ₂ -MIL-125（Ti）中的碳纳米点（CD ），是通过简单便捷的低温煅烧方法原位构建的，具有很好的应用前景。在可见光照射下，NO去除能力（在空气水平）和H ₂同时释放。CDs @ NH ₂ -MIL-125（Ti）的NO去除率达到53％，比原始NH ₂ -MIL-125（Ti）高28.4％。此外，H _2的产生率为5820.95μmolg ^-1，是原始NH _2的5.34倍。-MIL-125（Ti）。以UV-Vis，UCPL，ESR和原位DRIFTS等为特征的CDs @ NH ₂ -MIL-125（Ti）的相应光电性能表明，包封的CD均匀地分散在NH ₂ -MIL的孔中-125（Ti）可以通过上转换效应和光敏作用提高可见光利用率，并且可以用作电子接收器，显着延长光生载流子的寿命，从而增强光催化性能。结果表明，用金属有机骨架（MOF）制备CD可能是我们同时提高光催化NO消除和H ₂析出活性的可用策略。