Preparation of pristine CN

JW Ji Wu
ZL Zhonghuan Liu
XL Xinyu Lin
EJ Enhui Jiang
SZ Shuai Zhang
PH Pengwei Huo
YY Yan Yan
PZ Peng Zhou
YY Yongsheng Yan
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Typically, CN was synthesized by calcining melamine powder (10 g) at 550 °C for 4 h with a ramping rate of 5 °C min−1 in static air in a muffle furnace. After naturally cooling down to room temperature, the resulting product was dissolved into 0.5 M HNO3 solution, bathing for 4 h at 80 °C. Then, light yellow agglomerates were gathered, cross-washed with deionized water and ethanol several times, and dried at 60 °C in a vacuum oven for further use.

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