Qi Yirong, Liang Qinghua, Lv Ruitao, Shen Wanci, Kang Feiyu, Huang Zheng-Hong
State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China.
Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China.
R Soc Open Sci. 2018 May 16;5(5):180187. doi: 10.1098/rsos.180187. eCollection 2018 May.
The key to solving environmental and energy issues through photocatalytic technology requires highly efficient, stable and eco-friendly photocatalysts. Graphitic carbon nitride (g-CN) is one of the most promising candidates except for its limited photoactivity. In this work, a facile and scalable one-step method is developed to fabricate an efficient heterostructural g-CN photocatalyst coupled with MoS. The strong coupling effect between the MoS nanosheets and g-CN scaffold, numerous mesopores and enlarged specific surface area helped form an effective heterojunction. As such, the photocatalytic activity of the g-CN/MoS is more than three times higher than that of the pure g-CN in the degradation of RhB under visible light irradiation. Improvement of g-CN/MoS photocatalytic performance is mainly ascribed to the effective suppression of the recombination of charge carriers.
通过光催化技术解决环境和能源问题的关键在于需要高效、稳定且环保的光催化剂。石墨相氮化碳（g-CN）是最具潜力的候选材料之一，只是其光活性有限。在这项工作中，开发了一种简便且可扩展的一步法来制备与MoS耦合的高效异质结构g-CN光催化剂。MoS纳米片与g-CN支架之间的强耦合效应、大量的中孔和增大的比表面积有助于形成有效的异质结。因此，在可见光照射下，g-CN/MoS在降解罗丹明B方面的光催化活性比纯g-CN高出三倍多。g-CN/MoS光催化性能的提高主要归因于对电荷载流子复合的有效抑制。
