1. In situ extract nucleate sites for the growth of free-standing carbon nitride films on various substrates.
- Author
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Li, Huiliang, Huang, Huining, Wang, Zeyan, Zheng, Zhaoke, Wang, Peng, Liu, Yuanyuan, Zhang, Xiaoyang, Qin, Xiaoyan, Dai, Ying, Li, Yingjie, Zou, Huiling, and Huang, Baibiao
- Subjects
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CARBON films , *METALLIC films , *HYDROGEN evolution reactions , *MOLECULAR structure , *VISIBLE spectra , *NITRIDES , *EXTRACTS - Abstract
• CCl 4 assisted method was firstly applied to construct free-standing g-C 3 N 4 films. • Metal cations can be in-situ extracted from the substrates and serve as nucleate sites. • The physicochemical properties of the g-C 3 N 4 films can be easily adjusted. • The g-C 3 N 4 film exhibited an excellent visible-light hydrogen evolution rate of 74.98 μmol g−1 h−1. Developing a simple and general method to fabricate graphitic carbon nitride (g-CN) film is crucial for the application of devices. Herein, we report a CCl 4 -assisted method for the fabrication of continuous g-CN films on various substrates with in-situ extracted metal cations as nucleate sites. The g-CN film exhibits continuous wrinkles-like graphene structure, and can be completely exfoliated as a free-standing film. In the g-CN film, the metallic cations are bonded with the electron-rich nitrogen as the nucleate sites for connecting molecular structure. By changing the synthesis temperature and the flow rate of CCl 4 , the thickness and the band structure of the g-CN films can be successfully adjusted. Under visible light illumination, the g-CN films exhibit efficient hydrogen evolution with a rate of 74.98 μmol g−1 h−1. We believe that the precise controlled free-standing g-CN film will shed light on many opportunities in the utilization of graphitic carbon nitride for catalysis, sensor, electronic and energy-related applications. This method may open a new avenue to fabricate other two-dimensional films on different substrates. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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