Enhanced full-spectrum-response photocatalysis and reusability of MoSe2 via hierarchical N-doped carbon nanofibers as heterostructural supports
Enhanced full-spectrum-response photocatalysis and reusability of MoSe2 via hierarchical N-doped carbon nanofibers as heterostructural supports
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通过分层 N 掺杂碳纳米纤维作为异质结构支撑增强 MoSe2 的全光谱响应光催化和可重复使用性
DOI：
10.1021/acssuschemeng.8b02985
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发表时间：
2018
影响因子：
8.4
通讯作者：
Liu Yichun
中科院分区：
文献类型：
--
作者：
Yang Shu;Shao Changlu;Tao Ran;Li Xiaowei;Han Chaohan;Liu Haiyang;Li Xinghua;Liu Yichun
界面工程是设计高效光催化剂的有效方法。为了提高二硒化钼（MoSe 2）的全光谱响应，采用分级N掺杂碳纳米纤维（H-N-CNFs）作为异质结构支撑体，促进其界面电荷转移，提高其电荷分离。H-N-CNF/MoSe 2异质结在全光谱照射下对不同污染物的降解效果明显优于CNF/MoSe 2异质结和MoSe 2。用XPS分析了异质结的能带弯曲，用电化学阻抗谱研究了氮掺杂对异质结电导率的影响。光电流测量和电子自旋共振数据证实了它们改善的电荷分离和增强的产生活性物种·O2-和·OH的能力。此外，H-N-CNF/MoSe 2异质结具有独特的自支撑结构，易于重复使用。该工作为通过适当的界面设计开发高效全光谱响应光催化剂提供了新的见解。
Interface engineering is a valuable method for designing high-efficiency photocatalysts. Herein, to improve the full-spectrum-response of molybdenum diselenide (MoSe2), hierarchical N-doped carbon nanofibers (H–N–CNFs) were used as heterostructural supports to promote their interface charge transfer and improve their charge separation. The H–N–CNF/MoSe2heterojunctions presented a photocatalytic performance that was much better than that of the CNF/MoSe2heterojunctions and MoSe2for the degradation of different polluants under full-spectrum irradiation. The band bending of the heterojunction was studied by XPS analysis, and the nitrogen-doping effects on their conductivity were investigated by the electrochemical impedance spectra. Photocurrent measurements and electron spin resonance data confirmed their improved charge separation and the enhanced ability for generating active species of •O2–and •OH. Furthermore, the H–N–CNF/MoSe2heterojunctions with unique self-supporting structure can easily be reused. The work provides new insights on developing a high-efficiency full-spectrum-response photocatalyst via proper interface design.