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Preparation of oxidized carbon nanotube (OCNT)

GH Guokang Han
XZ Xue Zhang
WL Wei Liu
QZ Qinghua Zhang
ZW Zhiqiang Wang
JC Jun Cheng
TY Tao Yao
LG Lin Gu
CD Chunyu Du
YG Yunzhi Gao
GY Geping Yin
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CNT (XFNANO, Co., Ltd.) was pretreated in 6 mol L−1 HCl solution for 12 h to remove any impurities. After that, the CNT sample was filtrated, washed with ultra-pure water and freeze-dried. 30 mL concentrated sulfuric acid was added into 200 mg treated CNT in a three-neck round-bottom flask. After stirring for 30 min, 10 mL concentrated HNO3 was added dropwise, and the mixture was refluxed at 70 °C for 2 h and cooled down to room temperature. OCNT was collected by filtration, washing repeatedly with ultra-pure water and freeze-drying.

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