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/MoSe₂ heterojunctions presented a photocatalytic performance that was much better than that of the CNF/MoSe₂ heterojunctions and MoSe₂ for 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/MoSe₂ heterojunctions 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.

中文翻译：

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通过分层N掺杂碳纳米纤维作为异质结构支持物增强的MoSe _2的全光谱响应光催化和可重复使用性

界面工程是设计高效光催化剂的一种有价值的方法。在本文中，为了改善二硒化钼（MoSe ₂）的全光谱响应，分层的N掺杂碳纳米纤维（H–N–CNF）被用作异质结构载体，以促进其界面电荷转移并改善其电荷分离。H–N–CNF / MoSe ₂异质结表现出比CNF / MoSe ₂异质结和MoSe ₂更好的光催化性能。在全光谱辐照下降解不同的污染物。通过XPS分析研究了异质结的能带弯曲，并通过电化学阻抗谱研究了氮掺杂对其电导率的影响。光电流测量和电子自旋共振数据证实，它们改善了电荷分离，并增强了产生•O ₂ ^–和•OH活性物种的能力。此外，具有独特自支撑结构的H–N–CNF / MoSe ₂异质结可以轻松重复使用。这项工作为通过适当的界面设计开发高效的全光谱响应光催化剂提供了新的见解。