Thermodynamics of dye adsorption on electrochemically exfoliated graphene

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	Thermodynamics of dye adsorption on electrochemically exfoliated graphene
	Xue, Zhishuang 1; Zhao, Shanlin 1; Zhao, Zenghua 2; Li, Ping 1; Gao, Jianhui 1
刊名	JOURNAL OF MATERIALS SCIENCE
	2016-05-01
卷号	51 期号:10 页码:4928-4941
关键词	METHYLENE-BLUE AQUEOUS-SOLUTION OXIDE REMOVAL EQUILIBRIUM COMPOSITE KINETICS BIOSORPTION REDUCTION MECHANISM
ISSN号	0022-2461
通讯作者	Li, P (reprint author), Liaoning Shihua Univ, Sch Chem Chem Engn & Environm Engn, Fushun 113001, Liaoning, Peoples R China.
英文摘要	Graphene sheets prepared by electrochemical exfoliation have been used for the adsorption of methylene blue (MB), a cationic dye from aqueous solution. The maximum adsorbed amount of MB on exfoliated graphene (EG) reaches 511.7 mg g(-1) when the initial concentration of MB is 500 mg L-1, with EG whose dosage is 10 mg. Further study on the adsorption mechanism of EG includes isothermal adsorption equilibrium, thermodynamics, and kinetics. The study on isothermal adsorption equilibrium shows that the adsorption follows the Langmuir isotherm. Various thermodynamic parameters such as Gibbs free energy (Delta G(0)), enthalpy (Delta H-0), and entropy (Delta S-0) change were also evaluated. It indicates that the adsorption is a spontaneous, endothermic, and physical adsorption process. The kinetic data reveals that the adsorption process of MB fits well with the pseudo second-order model. The Weber's intra-particle diffusion model demonstrates that the adsorption rate is controlled by both external diffusion and intra-particle diffusion. EG as a cationic dye scavenger displays high speed and efficiency.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	METHYLENE-BLUE ; AQUEOUS-SOLUTION ; OXIDE ; REMOVAL ; EQUILIBRIUM ; COMPOSITE ; KINETICS ; BIOSORPTION ; REDUCTION ; MECHANISM
收录类别	SCI
原文出处	SPRINGER
语种	英语
WOS记录号	WOS:000372573000019
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20654]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Liaoning Shihua Univ, Sch Chem Chem Engn & Environm Engn, Fushun 113001, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xue, Zhishuang,Zhao, Shanlin,Zhao, Zenghua,et al. Thermodynamics of dye adsorption on electrochemically exfoliated graphene[J]. JOURNAL OF MATERIALS SCIENCE,2016,51(10):4928-4941.
APA	Xue, Zhishuang,Zhao, Shanlin,Zhao, Zenghua,Li, Ping,&Gao, Jianhui.(2016).Thermodynamics of dye adsorption on electrochemically exfoliated graphene.JOURNAL OF MATERIALS SCIENCE,51(10),4928-4941.
MLA	Xue, Zhishuang,et al."Thermodynamics of dye adsorption on electrochemically exfoliated graphene".JOURNAL OF MATERIALS SCIENCE 51.10(2016):4928-4941.