Construction of Few-Layer Ti3C2 MXene and Boron-Doped g-C3N4 for Enhanced Photocatalytic CO2 Reduction
Construction of Few-Layer Ti3C2 MXene and Boron-Doped g-C3N4 for Enhanced Photocatalytic CO2 Reduction
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构建少层 Ti3C2 MXene 和掺硼 g-C3N4 以增强光催化 CO2 还原
DOI：
10.1021/acssuschemeng.1c01155
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发表时间：
2021-06
影响因子：
8.4
通讯作者：
Wu Zhongbiao
中科院分区：
文献类型：
--
作者：
Wang Haiqiang;Tang Qijun;Wu Zhongbiao
利用生物质能将二氧化碳（CO2）转化为高附加值的化学品被认为是同时缓解温室效应和全球能源危机的潜在方法。在此，硼掺杂的石墨碳氮化物（g-C3 N4）与少层Ti 3C 2 MXene（FLTC）通过静电自组装结合。该复合材料表现出上级裸g-C3 N4和B掺杂g-C3 N4（BCN）的性能。优化后的12 FLTC/BCN在可见光下产生的CO和CH 4产率分别是裸g-C3 N4的3.2倍和8.9倍。此外，12 FLTC/BCN在循环实验中显示出优异的稳定性。几个表征（光致发光，时间分辨光致发光，and-tcurves）进行证明的协同作用的硼掺杂剂和FLTC的添加。此外，12 FLTC/BCN具有增强的光生载流子分离和加速的电荷传输，导致更好的光催化活性。我们相信，这项工作将鼓励更多的研究MXene为基础的光催化剂，用于不同的光催化过程，包括光催化CO2还原。
The conversion of carbon dioxide (CO2) into high-value-added chemicals by photocatalysis is recognized as a potential method to ease the greenhouse effect and the global energy crisis simultaneously. Herein, boron-doped graphitic carbon nitride (g-C3N4) was combined with few-layer Ti3C2MXene (FLTC) by electrostatic self-assembly. The composite exhibited superior performance to bare g-C3N4and B-doped g-C3N4(BCN). The optimized 12FLTC/BCN produced 3.2- and 8.9-times higher CO and CH4yields, respectively, than bare g-C3N4under visible light. Moreover, 12FLTC/BCN showed excellent stability during the cycling experiment. Several characterizations (photoluminescence, time-resolved photoluminescence, andi–tcurves) were carried out to demonstrate the synergy of boron dopants and the addition of FLTC. Besides, 12FLTC/BCN showed enhanced separation of photoinduced carriers and accelerated charge transport, leading to better photocatalytic activity. We believe that this work will encourage more research on MXene-based photocatalysts for different photocatalysis processes including photocatalytic CO2reduction.
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DOI：
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