Preparation of reduced graphene oxide/montmorillonite composite hydrogel and its applications for chromium(VI) and organic compounds adsorption
A novel 3D porous reduced graphene oxide/montmorillonite composite hydrogel (rGO–MMT) was prepared by solvent method, where the MMT nanosheets were homogenously dispersed in 3D rGO hydrogel. The porous 3D structure and the high dispersion of MMT nanosheets can promote the adsorption capacity. The ef...
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| Veröffentlicht in: | Research on chemical intermediates 2020-12, Vol.46 (12), p.5345-5359 |
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| creator | Peng, Chundong He, Zetian Feng, Jiejie Chen, Daimei Ding, Hao Wang, Jiao Du, Gaoxiang |
| description | A novel 3D porous reduced graphene oxide/montmorillonite composite hydrogel (rGO–MMT) was prepared by solvent method, where the MMT nanosheets were homogenously dispersed in 3D rGO hydrogel. The porous 3D structure and the high dispersion of MMT nanosheets can promote the adsorption capacity. The effects of MMT content (wt%), the initial concentration of Cr(VI) solution (C0), pH value (pH0), the adsorption dose and temperatures on the adsorption capacity of rGO–MMT for Cr(VI) ions have been investigated. The optimum pH value for Cr(VI) adsorption is 2, and the adsorption capacity increases with MMT content and adsorption temperature. The rGO–MMT composite hydrogel displays the excellent adsorption property for both the heavy metal and organic pollutants. The adsorption capacity of rGO–MMT composite hydrogel is obviously higher than those of single rGO hydrogel and MMT due to the synergistic adsorption of rGO hydrogel and MMT. The adsorption of Cr(VI) ions on the rGO–MMT composite hydrogel follows linear pseudo-second-order kinetics, and the Langmuir model describes the adsorption process much better. Thermodynamic parameters indicate that adsorption is spontaneous, favorable and endothermic in nature.
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| doi_str_mv | 10.1007/s11164-020-04266-w |
| format | Article |
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Graphic abstract</description><subject>Adsorption</subject><subject>Catalysis</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Chromium</subject><subject>Dispersion</subject><subject>Graphene</subject><subject>Heavy metals</subject><subject>Hydrogels</subject><subject>Inorganic Chemistry</subject><subject>Montmorillonite</subject><subject>Nanostructure</subject><subject>Organic compounds</subject><subject>Physical Chemistry</subject><subject>Pollutants</subject><subject>Process parameters</subject><issn>0922-6168</issn><issn>1568-5675</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kM1KxDAURoMoOI6-gKuAG11Uk7RN26WIfyDoQt2GNLmdibRJvWlRn8JXtjMV3LnKJZzzXe5HyDFn55yx4iJyzmWWMMESlgkpk48dsuC5LJNcFvkuWbBKiERyWe6TgxjfGON5WbIF-X5C6DXqwQVPQ0MR7GjA0hXqfg0eaPh0Fi664IcuoGvb4N0A1ISuD3Ezrb8shhW0VHtL3RCp7vvWmW1gpE1AatYYOjd2p6_3Z1sq4Ep7Z-aQ0dvJsTFgv1EOyV6j2whHv--SvNxcP1_dJQ-Pt_dXlw-JSXM5JJAVua6zFGRlmrLWJTeprKaDayNkLTTIRmib8wJKUU0_GZhKc1ZbybNa1kW6JCdzbo_hfYQ4qLcwop9WKpEVaVHygrGJEjNlMMSI0KgeXafxS3GmNsWruXg1Fa-2xauPSUpnKU6wXwH-Rf9j_QDgA4rn</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Peng, Chundong</creator><creator>He, Zetian</creator><creator>Feng, Jiejie</creator><creator>Chen, Daimei</creator><creator>Ding, Hao</creator><creator>Wang, Jiao</creator><creator>Du, Gaoxiang</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20201201</creationdate><title>Preparation of reduced graphene oxide/montmorillonite composite hydrogel and its applications for chromium(VI) and organic compounds adsorption</title><author>Peng, Chundong ; He, Zetian ; Feng, Jiejie ; Chen, Daimei ; Ding, Hao ; Wang, Jiao ; Du, Gaoxiang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-e475ab43e69cf8ba81c369156bc26b2ae6f2ad517e82926b4ec9a10bd614b6b73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Adsorption</topic><topic>Catalysis</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Chromium</topic><topic>Dispersion</topic><topic>Graphene</topic><topic>Heavy metals</topic><topic>Hydrogels</topic><topic>Inorganic Chemistry</topic><topic>Montmorillonite</topic><topic>Nanostructure</topic><topic>Organic compounds</topic><topic>Physical Chemistry</topic><topic>Pollutants</topic><topic>Process parameters</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Peng, Chundong</creatorcontrib><creatorcontrib>He, Zetian</creatorcontrib><creatorcontrib>Feng, Jiejie</creatorcontrib><creatorcontrib>Chen, Daimei</creatorcontrib><creatorcontrib>Ding, Hao</creatorcontrib><creatorcontrib>Wang, Jiao</creatorcontrib><creatorcontrib>Du, Gaoxiang</creatorcontrib><collection>CrossRef</collection><jtitle>Research on chemical intermediates</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Peng, Chundong</au><au>He, Zetian</au><au>Feng, Jiejie</au><au>Chen, Daimei</au><au>Ding, Hao</au><au>Wang, Jiao</au><au>Du, Gaoxiang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation of reduced graphene oxide/montmorillonite composite hydrogel and its applications for chromium(VI) and organic compounds adsorption</atitle><jtitle>Research on chemical intermediates</jtitle><stitle>Res Chem Intermed</stitle><date>2020-12-01</date><risdate>2020</risdate><volume>46</volume><issue>12</issue><spage>5345</spage><epage>5359</epage><pages>5345-5359</pages><issn>0922-6168</issn><eissn>1568-5675</eissn><abstract>A novel 3D porous reduced graphene oxide/montmorillonite composite hydrogel (rGO–MMT) was prepared by solvent method, where the MMT nanosheets were homogenously dispersed in 3D rGO hydrogel. The porous 3D structure and the high dispersion of MMT nanosheets can promote the adsorption capacity. The effects of MMT content (wt%), the initial concentration of Cr(VI) solution (C0), pH value (pH0), the adsorption dose and temperatures on the adsorption capacity of rGO–MMT for Cr(VI) ions have been investigated. The optimum pH value for Cr(VI) adsorption is 2, and the adsorption capacity increases with MMT content and adsorption temperature. The rGO–MMT composite hydrogel displays the excellent adsorption property for both the heavy metal and organic pollutants. The adsorption capacity of rGO–MMT composite hydrogel is obviously higher than those of single rGO hydrogel and MMT due to the synergistic adsorption of rGO hydrogel and MMT. The adsorption of Cr(VI) ions on the rGO–MMT composite hydrogel follows linear pseudo-second-order kinetics, and the Langmuir model describes the adsorption process much better. Thermodynamic parameters indicate that adsorption is spontaneous, favorable and endothermic in nature.
Graphic abstract</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11164-020-04266-w</doi><tpages>15</tpages></addata></record> |
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| subjects | Adsorption Catalysis Chemistry Chemistry and Materials Science Chromium Dispersion Graphene Heavy metals Hydrogels Inorganic Chemistry Montmorillonite Nanostructure Organic compounds Physical Chemistry Pollutants Process parameters |
| title | Preparation of reduced graphene oxide/montmorillonite composite hydrogel and its applications for chromium(VI) and organic compounds adsorption |
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