The photocatalytic activity of g-C₃N₅ is limited by its low photoelectric separation efficiency and high carrier recombination rate. To address this problem, the band gap of g-C₃N₅ was controlled via P doping, followed by deposition of a CoOOH·CoO_x cocatalyst. The synthesized CoOOH·CoO_x/P–C₃N₅ composite shows the characteristics of high photoelectric separation efficiency and low carrier recombination rate. DFT calculation and XPS revealed that P replaced the C atoms in g-C₃N₅ and interact with the Co atom to form an electron transport channel, showing P-dependent co-catalytic activity. The CoOOH·CoO_x cocatalyst accelerated the electron transfer process of P–C₃N₅ while inhibiting the recombination of carriers and improving the photocatalytic reaction efficiency. The advantages of this strategy were verified by the degradation of TC, and the reaction rate of the obtained material was 59.6 times higher than that of pure g-C₃N₅. Using this strategy, the photoelectric separation efficiency was simultaneously enhanced, and then the fast recombination of the g-C₃N₅ carriers was effectively suppressed.

中文翻译：

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g-C3N5 表面上异质结助催化剂的原位生长增强电荷转移以提高光催化活性


g-C ₃ N ₅ 的光催化活性因其较低的光电分离效率和较高的载流子复合率而受到限制。为了解决这个问题，通过P掺杂控制g-C ₃ N ₅ 的带隙，然后沉积CoOOH·CoO _x 助催化剂。合成的CoOOH·CoO _x /P–C ₃ N ₅ 复合材料表现出光电分离效率高、载流子复合率低的特点。 DFT计算和XPS表明，P取代了g-C ₃ N ₅ 中的C原子，并与Co原子相互作用形成电子传输通道，表现出P依赖的共催化活性。 CoOOH·CoO _x 助催化剂加速了P–C ₃ N ₅ 的电子转移过程，同时抑制了载流子的复合，提高了光催化反应效率。通过TC的降解验证了该策略的优点，所得材料的反应速率比纯g-C ₃ N ₅ 提高了59.6倍。采用该策略，同时提高了光电分离效率，进而有效抑制了g-C ₃ N ₅ 载流子的快速复合。