材料科学
纳米复合材料
石墨烯
傅里叶变换红外光谱
吸光度
可见光谱
离子
吸收边
化学工程
光化学
纳米技术
带隙
光电子学
化学
有机化学
工程类
色谱法
作者
Ersu LOKCU,Nilay Kaçar,Meltem Çayirli,Reşat Can Özden,Mustafa Anık
标识
DOI:10.1021/acsami.2c05607
摘要
In this work, g-C3N4/rGO nanocomposites were synthesized to use them as photocatalysts in Li-ion oxygen batteries by aiming at the reduction of the charging potential efficiently under photoassisted conditions. Fourier transform infrared (FTIR) spectra showed that novel C═C bonds formed between g-C3N4 and rGO during the decomposition of melamine and that the formation of these bonds was assumed to cause a red shift in the optical absorption band edge. The competition between the narrowing in the optical band gaps of the nanocomposites as a result of the red shift due to the presence of rGO and the degradation in the visible light utilization as a result of favorably absorbed incident light by rGO instead of g-C3N4 pointed out that the g-C3N4/3% rGO nanocomposite has the optimum light absorbance efficiency. The photoassisted charging tests indicated that the g-C3N4/3% rGO nanocomposite reduced the charging potential effectively, especially at higher current densities, and improved the cyclic discharge–charge performance of the Li-ion oxygen batteries considerably.
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