Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation
| Autor: | Songdong Yuan, Yanhui Hu, Jianhua Min, Xiangyi Deng, Xiaohua Zuo, Xiaobo Wang, Sijie Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Kinetics
Inorganic chemistry Oxide 02 engineering and technology phenolic compounds 010501 environmental sciences 01 natural sciences lcsh:Technology reduced graphene oxide π-π interaction law.invention lcsh:Chemistry chemistry.chemical_compound Adsorption law Phenol General Materials Science Phenols Benzene Instrumentation lcsh:QH301-705.5 0105 earth and related environmental sciences Naphthalene Fluid Flow and Transfer Processes Chemistry Graphene lcsh:T Process Chemistry and Technology General Engineering 021001 nanoscience & nanotechnology lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 adsorption 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences Volume 8 Issue 10 Applied Sciences, Vol 8, Iss 10, p 1950 (2018) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app8101950 |
| Popis: | A series of phenolic compounds containing 2-phenylphenol (PPE), bisphenol A (BPA), 4-isopropylphenol (IPE), 4-methylphenol (ME) and phenol (PE) were selected to investigate their major influence factors for their adsorption on graphene oxide (GO) and reduced graphene oxide (RGO) by studying their adsorption isotherms and kinetics. It was found that the adsorption of all tested phenols fitted well with the Freundlich model. In comparison, the adsorption ability of RGO with a stronger &pi &pi interaction was superior to GO, which was confirmed by using naphthalene probe measurements. The thermodynamic characteristics, by studying the effect of the adsorption temperatures (298, 313 and 333 K), demonstrated that the adsorption process was spontaneous, exothermic and entropy-decreasing. The chemical structures of the phenols also affected their adsorption on GO and RGO. It was found that the adsorption capacities of phenols were, in order, PE (0.271 mmol g&minus 1 on GO and 0.483 mmol g&minus 1 on RGO) < ME (0.356 and 0.841 mmol g&minus 1) < IPE (0.454 and 1.117 mmol g&minus BPA (0.4 and 1.56 mmol g&minus PPE (0.7 and 2.054 mmol g&minus 1), which depended on the &pi electron density of the benzene ring by means of a density functional theory (DFT) calculation. Undoubtedly, the reduction of GO and an increase in &pi electron density on the chemical structures of phenols facilitated the adsorption. |
| Databáze: | OpenAIRE |
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