文献类型： 外文期刊

作者： Zhou, Yuqing ¹ ; Gao, Yue ² ; Wang, Huiliang ³ ; Xia, Minggui ¹ ; Yue, Qinyan ² ; Xue, Zhiyong ¹ ; Zhu, Junjiang ¹ ; Yu, ¹ ;

作者机构： 1.Wuhan Text Univ, Sch Chem & Chem Engn, Hubei Key Lab Biomass Fibers & Ecodyeing & Finish, Wuhan 430073, Peoples R China

2.Shandong Univ, Sch Environm Sci & Engn, Shandong Prov Key Lab Water Pollut Control & Reso, Jinan 250100, Peoples R China

3.Hubei Acad Agr Sci, Inst Fruit & Tea, Hubei Innovat Ctr Agr Sci & Technol, Wuhan 430209, Peoples R China

4.Wuhan Inst Technol, Natl Engn Res Ctr Phosphorus Resource Exploitat, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430074, Peoples R China

关键词： Graphene; Poly(amino-phosphonic acid); Aerogel; Water purification; Cr(III) and MB removal; Oils and solvents absorption

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：6.551； 五年影响因子：6.419 ）

ISSN： 0048-9697

年卷期： 2021 年 776 卷

页码：

收录情况： SCI

摘要： The fabrication of multifunctional materials to remove soluble heavy metal ions and dyes, as well as insoluble oils from waste water is urgently required, yet remains a daunting challenge because of difficulty in controlling their structure and property to satisfy various demands. Herein, for the first time, novel 3D reduced graphene oxide/ poly(amino-phosphonic acid) (PAPA) aerogels (rGO/PAPAs) with different PAPA content were developed by solvothermal reduction of the graphene oxide and cross-linking with PAPA chain, and subsequently employed as versatile adsorbent for the removal of complex pollutants such as Cr(III) ion, methylene blue (MB) dye and various kinds of organic solvents from water. Benefiting from the synergistic effect of the reduced graphene oxide (rGO) sheet and PAPA component, as well as its unique 3D structure, the resultant aerogel (rGO/PAPA2) gained amphiphilic, ultralight, and multifunctional properties. Thus, it showed a fast adsorption rate (within 15 min) and high adsorption capacity (up to 327.1 mg/g) for Cr(III) ion at an optimal pH of 5.5 due to its unique 3D network structure with abundant amino-phosphonic acid functional groups. The uptake of Cr(III) by rGO/ PAPA-2 was fitted well with the Langmuir isotherm and pseudo-second-order kinetic model. The adsorption mechanism of Cr(III) onto rGO/PAPA-2 can be attributed to electrostatic attraction and surface complexation with APA groups. In addition, the rGO/PAPA-2 displayed an excellent adsorption performance for MB (694.5 mg/g) and several organic solvents (83.2 to 254.3 g/g). Moreover, the rGO/PAPA-2 exhibited a good regeneration (around 99%) and satisfactory recovery abilities for the tested adsorbates. Notably, PAPA chains can be easily prepared from waste acrylic fibers, making it become a cost effective but versatile candidate to prepare new material. Therefore, this work provides a new design strategy to fabricate the rGO/PAPA-2 aerogel with great prospect for sophisticated industrial wastewater cleanup. (c) 2021 Elsevier B.V. All rights reserved.