Investigation of hydrogen production catalysis under low-temperature and low-power light irradiation, such as LEDs, is important for energy conservation in cold natural conditions. Interlayer charge transfer in g-CN nanosheets is influenced by the crystal face spacing and nanosheet thickness, due to rapid photogenerated carrier recombination and slow charge transfer, thus enhancing hydrogen production capabilities. Few studies have controlled both crystal face spacing and nanosheet thickness simultaneously. In this research, copper-phosphorus co-doped g-CN was synthesized through one-step thermal polymerization, achieving both control over nanosheet thickness and crystal surface spacing. The hydrogen production rate of 0.5 %Cu/1 %P doped g-CN was increased by 5.25 times and reached 958.98 μmol/g/h under 10 °C and 10 W LED illumination. Copper and phosphorus doping that reduced (002) surface spacing of g-CN, resulting in thinner nanosheets. This structural modification facilitated interlayer charge transfer and suppressed photogenerated carrier recombination. This research provides a novel insight and strategy for designing hydrogen production photocatalyst at low temperatures and with low energy consumption.

中文翻译：

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氮化碳的晶面间距和纳米片厚度调控及其在10W LED照射下的“冷”催化制氢性能


研究低温低功率光照射下的制氢催化（例如 LED）对于寒冷自然条件下的节能具有重要意义。 g-CN纳米片中的层间电荷转移受到晶面间距和纳米片厚度的影响，由于快速的光生载流子复合和缓慢的电荷转移，从而增强了产氢能力。很少有研究同时控制晶面间距和纳米片厚度。本研究通过一步热聚合合成了铜磷共掺杂g-CN，实现了对纳米片厚度和晶面间距的控制。 0.5%Cu/1%P掺杂的g-CN在10℃、10W LED照明下，产氢率提高了5.25倍，达到958.98 μmol/g/h。铜和磷掺杂减少了 g-CN 的 (002) 表面间距，从而形成更薄的纳米片。这种结构修饰促进了层间电荷转移并抑制了光生载流子复合。这项研究为设计低温、低能耗的制氢光催化剂提供了新颖的见解和策略。