期刊
ADSORPTION SCIENCE & TECHNOLOGY
卷 30, 期 5, 页码 437-447出版社
SAGE PUBLICATIONS INC
DOI: 10.1260/0263-6174.30.5.437
关键词
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资金
- National Natural Science Foundation of China [21076056]
- Chinese Ministry of Education [2100016]
- Specialized Research Fund for the Doctoral Program of Higher Education [20091317120005]
In this study, graphite oxide (GO) was prepared by a simple one-pot treatment method and used as an adsorbent for removing cationic dyes, methylene blue (MB), crystal violet (CV) and rhodamine B (RhB) from aqueous solution of different initial concentrations. We found that an increase in initial dye concentration favoured adsorption. The adsorption kinetic process fits to the pseudo-second-order equation. When compared with the expanded graphite, GO exhibits a high adsorption capability on non-acid dye molecules, with the adsorption capacities of 199.2, 195.4 and 154.8 mg.g(-1) for MB, CV and RhB, respectively. An analysis of the results of UV-Vis spectra suggested that the adsorbed dye molecules represent a different form of aggregation. Meanwhile, the layered graphene structure and surface oxygen functional groups play an important role in adsorption capability.
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