氧化石墨对对硝基苯酚的吸附行为

doi:10.3981/j.issn.1000-7857.2014.06.005

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Abstract: The graphite oxide was prepared from the powdered graphite via the Hummers method. It was characterized by the methods of the FT-IR, the XRD and the SEM. It is shown that the graphite oxide contains various oxygen-containing functional groups such as C—OH, —COOH and C—O—C, which increase the layer spaces. Adsorption experiments indicate that the graphite oxide has an outstanding adsorption ability for the p-nitrophenol. With the adsorption temperature at 298 K and the pH value at 7.0, the adsorptive capability of the graphite oxide is up to 80.69 mg/g, 6.1 times of that of the graphite powder. From the adsorption isotherms and thermodynamic functions, it is shown that the adsorption can be described by the Langmuir isothermal equation and is a spontaneous and exothermic process. The kinetic study shows that the adsorption can be fitted by second-order dynamic equations.

Key words： graphite oxide p-nitrophenol adsorption thermodynamics adsorption kinetics

Received: 16 September 2013

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	ZHA Fei
	ZENG Huichong
	CHANG Yue

Cite this article:

ZHA Fei,ZENG Huichong,CHANG Yue. Adsorption Properties of Graphite Oxide for p-Nitrophenol[J]. journal1, 2014, 32(6): 34-39.

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http://www.kjdb.org/EN/10.3981/j.issn.1000-7857.2014.06.005 OR http://www.kjdb.org/EN/Y2014/V32/I6/34

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