Graphitic carbon nitride (g-C₃N₄) is a promising visible light photocatalyst but bears low activity due to its high recombination rate of electron-hole pairs. Here, trace amorphous Ta₂O₅ modified TaC (TaC_xO_y) is in situ anchored on g-C₃N₄ (TaC_xO_y/g-C₃N₄) as an efficient photocatalyst to enhance charge separation. Introducing of TaC_xO_y endows TaC_xO_y/g-C₃N₄ with favorable band alignment and more exposed active sites. Specifically, 4.4 wt% TaC_xO_y/g-C₃N₄ embraces an optimal Cr⁶⁺ reduction conversion of 100% in 35 min, 49.3 and 2.4-fold enhancement, compared with bare TaC_xO_y and g-C₃N₄. Our work indicates that TaC_xO_y could be a promoter in water treatment and photo-energy conversion.

石墨碳氮化物（gC ₃ N ₄）是一种很有前途的可见光光催化剂，但由于其高的电子-空穴对复合率而具有较低的活性。在此，将痕量无定形Ta ₂ O ₅改性的TaC（TaC _x O _y）原位固定在gC ₃ N ₄（TaC _x O _y / gC ₃ N ₄）上，作为提高电荷分离的有效光催化剂。TaC _x O _y的引入赋予TaC _x O _y / gC ₃ N ₄具有良好的能带排列和更多暴露的活性位点。具体地，与裸露的TaC _x O _y和gC ₃ N ₄相比，4.4 wt％TaC _x O _y / gC ₃ N ₄包括在35分钟内100％的最佳Cr ⁶⁺还原转化率，49.3和2.4倍的增强。我们的工作表明TaC _x O _y可能是水处理和光能转化的促进剂。