Suspension of carbon nanotubes in natural humic acid water

WEI Chao-xian; ZHANG Huang; ZHANG Di; YANG Xiao-lei

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WEI Chao-xian, ZHANG Huang, ZHANG Di, YANG Xiao-lei. Suspension of carbon nanotubes in natural humic acid water. New Carbon Mater., 2017, 32(3): 252-257.

Citation:

WEI Chao-xian, ZHANG Huang, ZHANG Di, YANG Xiao-lei. Suspension of carbon nanotubes in natural humic acid water. New Carbon Mater., 2017, 32(3): 252-257.

WEI Chao-xian, ZHANG Huang, ZHANG Di, YANG Xiao-lei. Suspension of carbon nanotubes in natural humic acid water. New Carbon Mater., 2017, 32(3): 252-257.

Citation:

WEI Chao-xian, ZHANG Huang, ZHANG Di, YANG Xiao-lei. Suspension of carbon nanotubes in natural humic acid water. New Carbon Mater., 2017, 32(3): 252-257.

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Suspension of carbon nanotubes in natural humic acid water

1.
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2.
Yunnan Institute of Food Safety, Kunming University of Science & Technology, Kunming 650500, China

Funds: National Natural Science Foundation of China (41663014,41303093);Scientific Foundation of Yunnan Province (2014FB121);Scientific Foundation of Kunming University of Science and Technology (14118762).

Received Date: 2017-01-20
Accepted Date: 2017-06-28
Rev Recd Date: 2017-04-02
Publish Date: 2017-06-28

Abstract

Abstract

The widespread use of carbon nanotubes (CNTs) may cause them to be released into the environment.Their interaction with natural organic matter enhances their dispersion in water,leading to a severe environmental threat.In this study,the effect of dissolved humic acid (HA) on the dispersion of graphitized or hydroxylated CNTs in water was investigated by repeated dispersion of both CNTs in HA water with a concentration of 100 mg/L for 19 times.Results showed that the cumulative adsorption amounts of HA on the graphitized CNTs increased and leveled off,but those on the hydroxylated ones increased continually with the number of dispersions.The amounts of graphitized CNTs suspended in HA water were always lower than those of the hydroxylated ones,which reached a maximum after 4 of 5 dispersions.TEM images showed that hydroxylated CNTs were shorter than the graphitized ones and the suspended CNTs were shorter than the un-suspended ones for both types of CNTs,indicating that CNTs with more defects are easily suspended.
- Carbon nanotubes,
- Classified suspension,
- Transmission electron microscopy,
- Thermogravimetric analysis

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References(21)

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