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Effects of humic acid on copper adsorption onto few-layer reduced graphene oxide and few-layer graphene oxide
Yang, S; Li, LY; Pei, ZG; Li, CM; Shan, XQ; Wen, B; Zhang, SZ; Zheng, LR; Zhang, J; Xie, YN; Huang, RX;郑黎荣; Zhang J(张静); Xie YN(谢亚宁)
2014
Source PublicationCARBON
ISSN0008-6223
EISSN1873-3891
Volume75Pages:227-235
AbstractThe effects of humic acid (HA) on copper (Cu(II)) adsorption onto few-layer reduced graphene oxide (FRGO) and few-layer graphene oxide (FGO) were investigated using a batch equilibration method, micro-Fourier transform infrared spectroscopy, and extended X-ray absorption fine structure spectroscopy (EXAFS). The results showed that HA was adsorbed on FRGO through it-it interaction. The adsorbed HA introduced O-containing functional groups and negative charges to FRGO surfaces, increasing Cu(II) adsorption through chemical complexation and electrostatic attraction. In contrast, HA was adsorbed onto FGO mainly through polar interactions, due to its rich O-containing functional groups. The adsorbed HA had little effect on Cu(II) adsorption onto FGO because the shielding effect of HA on Cu(II) adsorption was offset by newly introduced adsorption sites of HA on FGO. EXAFS results suggested that Cu(II) was adsorbed on FRGO and FGO mainly through the coordination with their O-containing functional groups. When HA was added at pH 4.0 and 6.0, more Cu(II) was adsorbed on HA-coated FRGO. At pH 8.0, a portion of Cu(II) in solution precipitated on FRGO surface, while the presence of HA led to the formation of FRGO-HA-Cu ternary surface complexes instead of Cu(II) precipitation. (C) 2014 Elsevier Ltd. All rights reserved.
Subject AreaChemistry; Materials Science
DOI10.1016/j.carbon.2014.03.057
Indexed BySCI
Language英语
WOS IDWOS:000336877600020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224870
Collection多学科研究中心
Recommended Citation
GB/T 7714
Yang, S,Li, LY,Pei, ZG,et al. Effects of humic acid on copper adsorption onto few-layer reduced graphene oxide and few-layer graphene oxide[J]. CARBON,2014,75:227-235.
APA Yang, S.,Li, LY.,Pei, ZG.,Li, CM.,Shan, XQ.,...&谢亚宁.(2014).Effects of humic acid on copper adsorption onto few-layer reduced graphene oxide and few-layer graphene oxide.CARBON,75,227-235.
MLA Yang, S,et al."Effects of humic acid on copper adsorption onto few-layer reduced graphene oxide and few-layer graphene oxide".CARBON 75(2014):227-235.
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