Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation
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 ad...
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MDPI AG
2018-10-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/10/1950 |
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| author | Xiaobo Wang Yanhui Hu Jianhua Min Sijie Li Xiangyi Deng Songdong Yuan Xiaohua Zuo |
| author_facet | Xiaobo Wang Yanhui Hu Jianhua Min Sijie Li Xiangyi Deng Songdong Yuan Xiaohua Zuo |
| author_sort | Xiaobo Wang |
| collection | DOAJ |
| description | 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 π-π 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−1 on GO and 0.483 mmol g−1 on RGO) < ME (0.356 and 0.841 mmol g−1) < IPE (0.454 and 1.117 mmol g−1) < BPA (0.4 and 1.56 mmol g−1) < PPE (0.7 and 2.054 mmol g−1), which depended on the π-electron density of the benzene ring by means of a density functional theory (DFT) calculation. Undoubtedly, the reduction of GO and an increase in π-electron density on the chemical structures of phenols facilitated the adsorption. |
| first_indexed | 2024-12-12T22:45:09Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T22:45:09Z |
| publishDate | 2018-10-01 |
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| series | Applied Sciences |
| spelling | doaj.art-f1a0782b0931413c9459434449497fd52022-12-22T00:09:14ZengMDPI AGApplied Sciences2076-34172018-10-01810195010.3390/app8101950app8101950Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory CalculationXiaobo Wang0Yanhui Hu1Jianhua Min2Sijie Li3Xiangyi Deng4Songdong Yuan5Xiaohua Zuo6College of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaCollege of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaCollege of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaCollege of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaCollege of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaHubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068, ChinaCollege of Chemistry and Chemical Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaA 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 π-π 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−1 on GO and 0.483 mmol g−1 on RGO) < ME (0.356 and 0.841 mmol g−1) < IPE (0.454 and 1.117 mmol g−1) < BPA (0.4 and 1.56 mmol g−1) < PPE (0.7 and 2.054 mmol g−1), which depended on the π-electron density of the benzene ring by means of a density functional theory (DFT) calculation. Undoubtedly, the reduction of GO and an increase in π-electron density on the chemical structures of phenols facilitated the adsorption.http://www.mdpi.com/2076-3417/8/10/1950reduced graphene oxideπ-π interactionphenolic compoundsadsorption |
| spellingShingle | Xiaobo Wang Yanhui Hu Jianhua Min Sijie Li Xiangyi Deng Songdong Yuan Xiaohua Zuo Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation Applied Sciences reduced graphene oxide π-π interaction phenolic compounds adsorption |
| title | Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation |
| title_full | Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation |
| title_fullStr | Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation |
| title_full_unstemmed | Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation |
| title_short | Adsorption Characteristics of Phenolic Compounds on Graphene Oxide and Reduced Graphene Oxide: A Batch Experiment Combined Theory Calculation |
| title_sort | adsorption characteristics of phenolic compounds on graphene oxide and reduced graphene oxide a batch experiment combined theory calculation |
| topic | reduced graphene oxide π-π interaction phenolic compounds adsorption |
| url | http://www.mdpi.com/2076-3417/8/10/1950 |
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