Graphitic carbon nitride nanosheet for photocatalytic hydrogen production: The impact of morphology and element composition
Graphitic carbon nitride nanosheet for photocatalytic hydrogen production: The impact of morphology and element composition
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DOI：
10.1016/j.apsusc.2016.05.174
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发表时间：
2017
影响因子：
6.7
通讯作者：
Zhao Zhang;Yijie Zhang;Luhua Lu;Yanjie Si;Si Zhang;Ying Chen;Kai Dai;P. Duan;Limei Duan
中科院分区：
文献类型：
--
作者：
Zhao Zhang;Yijie Zhang;Luhua Lu;Yanjie Si;Si Zhang;Ying Chen;Kai Dai;P. Duan;Limei Duan
The intrinsic morphology and basal plane defects on g-C3N4nanosheet have important influences on its electronic structures and photocatalytic activity. In this work, we report extending thermal treatment time of g-C3N4at 550 °C not only change the morphology of g-C3N4but also element composition of g-C3N4. The morphology variation results in largely increased SSA from 40.22 to 117.27 m2g−1, obviously reduced pore size from 3.99 to 2.77 nm for g-C3N4and formation of in-plane holes. Moreover, composition variation of g-C3N4has also been found to have changed as the pyrolysis time extended. These changes have significant impact on the optical properties and photoelectrical characters of g-C3N4, which were investigated by UV-DSR, PL and Photocurrent measurement. The photocatalytic activity of g-C3N4obtained via 9 h thermal treatment at 550 °C has shown highest photocatalytic activity, which is 1.77 times than that of g-C3N4obtained via 3 h thermal treatment under visible irradiation and 1.99 times under UV irradiation respectively.
