氧空位介导的2D/2D Bi2MoO6/Bi2O2S S型异质结用于高效CO2光还原

殷鸿飞 洪梦玲 张锦阳 王文涛 陈伟 吴国志

引用本文: 殷鸿飞, 洪梦玲, 张锦阳, 王文涛, 陈伟, 吴国志. 氧空位介导的2D/2D Bi2MoO6/Bi2O2S S型异质结用于高效CO2光还原[J]. 物理化学学报, 2026, 42(9): 100332. doi: 10.1016/j.actphy.2026.100332 shu
Citation:  Hongfei Yin, Mengling Hong, Jinyang Zhang, Wentao Wang, Wei Chen, Guozhi Wu. Oxygen vacancy-mediated 2D/2D Bi2MoO6/Bi2O2S S-scheme heterojunctions for efficient CO2 photoreduction[J]. Acta Physico-Chimica Sinica, 2026, 42(9): 100332. doi: 10.1016/j.actphy.2026.100332 shu

氧空位介导的2D/2D Bi2MoO6/Bi2O2S S型异质结用于高效CO2光还原

    通讯作者: Email: yinhf@czu.edu.cn (殷鸿飞); wtwang@gznc.edu.cn (王文涛); allen_0688@163.com (吴国志)
摘要: 通过光催化高效还原CO2以生产高附加值化学品面临巨大挑战,主要体现在光催化剂的电荷分离与传输动力学以及CO2还原过程的热力学限制上。本研究提出了一种通过原位水热硫化法实现基于氧空位介导的二维/二维Bi2MoO6/Bi2O2S S型异质结的理性设计策略。X射线光电子能谱(XPS)和电子顺磁共振(EPR)测试证实,部分S2−取代[MoO4]2−形成了紧密结合的异质界面并诱导产生氧空位。密度泛函理论(DFT)计算表明,氧空位介导的Bi2MoO6/Bi2O2S S型异质结能显著降低*COOH形成这一决速步骤的能垒,从而优化CO2光还原热力学过程。实验结果表明,Bi2MoO6/Bi2O2S异质结(特别是BMOS5)具有最高的CO产率,达到11.01 μmol g−1 h−1,分别是纯相BMO和BOS的2.82倍与3.40倍。通过原位XPS、能带边缘测定及DFT计算,验证了S型电荷转移路径。这些研究结果为开发具有可调节缺陷的高性能S型异质结以实现太阳能驱动的二氧化碳还原提供了可行的途径。

English

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