Porous graphitic carbon nitride nanoplates obtained by a combined exfoliation strategy for enhanced visible light photocatalytic activity
Porous graphitic carbon nitride nanoplates obtained by a combined exfoliation strategy for enhanced visible light photocatalytic activity
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DOI：
10.1016/j.apsusc.2019.143901
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发表时间：
2020-01-01
影响因子：
6.7
通讯作者：
Shimada, Toshihiro
中科院分区：
文献类型：
--
作者：
Liu, Wei;Iwasa, Nobuhiro;Shimada, Toshihiro
石墨碳氮化物（g-C3 N4）的简单剥离成单层或少层纳米片仍然是g-C3 N4的基础研究和应用的巨大挑战。在此，我们提出了一种有效的战术，使用热蚀刻和气体驱动的剥离散装g-C3 N4的新组合的简易制造的少层多孔g-C3 N4纳米片。与纯的g-C3 N4相比，少层多孔g-C3 N4纳米片显示出改性的电子结构和大的比表面积。因此，在几次剥离循环之后获得的gC（3）N（4）纳米片显示出大大增强的光催化活性。在可见光照射下，g-C3 N4纳米片的平均析氢速率比本体纳米片高出近9倍，罗丹明B（RhB）的光降解效率提高了约6倍。我们的工作提供了一个有效的方法对制造的多孔g-C3 N4纳米板具有令人印象深刻的光催化性能。
The facile exfoliation of graphitic carbon nitride (g-C3N4) into single- or few-layered nanoplates remains a grand challenge for the fundamental studies and applications of g-C3N4. Herein, we present an efficient tactic for the facile fabrication of few-layered porous g-C3N4 nanoplates using a novel combination of thermal etching and gas-driven exfoliation of bulk g-C3N4. In comparison with the pristine g-C3N4 the few-layered porous g-C3N4 nanoplates displayed modified electronic structures and large specific surface area. Consequently, the obtained gC(3)N(4) nanoplates after the several exfoliation cycles showed greatly enhanced photocatalytic activities. The average hydrogen (H-2) evolution rate of g-C3N4 nanoplates exceeds that of the bulk counterpart by almost 9 times and the photodegradation efficiency of rhodamine B (RhB) increased by about 6-fold under visible light irradiation. Our work provides an efficient method towards the fabrication of porous g-C3N4 nanoplates with impressive photocatalytic performance.