氧化石墨烯@重金属离子（GO@M）复合物模拟废弃物作为从污染水中去除阳离子亚甲基蓝染料的高效吸附剂。

Graphene Oxide@Heavy Metal Ions (GO@M) Complex Simulated Waste as an Efficient Adsorbent for Removal of Cationic Methylene Blue Dye from Contaminated Water.

作者信息

Ding Yangfan, Chen Zhe, Wu Jinglei, Abd-Elhamid Ahmed I, Aly Hisham F, Nayl AbdElAziz A, Bräse Stefan

机构信息

Key Laboratory of Science and Technology, Eco-Textile & Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Bio-Technology, Donghua University, Shanghai 201620, China.

Composites and Nanostructured Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab 21934, Egypt.

出版信息

Materials (Basel). 2022 May 20;15(10):3657. doi: 10.3390/ma15103657.

DOI:10.3390/ma15103657

PMID:35629685

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9147086/

Abstract

Graphene oxide (GO) was heavily used in the adsorption process of various heavy metal ions (such as copper (Cu) and iron (Fe) ions), resulting in a huge waste quantity of graphene oxide@metal ions complex. In this research, the authors try to solve this issue. Herein, the GO surface was loaded with divalent (Cu) and trivalent (Fe) heavy metal ions as a simulated waste of the heavy metal in various removal processes to form GO@Cu and (GO@Fe) composites, respectively. After that, the previous nanocomposites were used to remove cationic methylene blue (MB) dye. The prepared composites were characterized with a scanning electron microscope (SEM), transition electron microscope (TEM), Fourier transmission infrared (FTIR), Raman, and energy-dispersive X-ray (EDS) before and after the adsorption process. Various adsorption factors of the two composites towards MB-dye were investigated. Based on the adsorption isotherm information, the adsorption process of MB-dye is highly fitted with the Langmuir model with maximum capacities (mg g) (384.62, GO@Cu) and (217.39, GO@Fe). According to the thermodynamic analysis, the adsorption reaction of MB-species over the GO@Cu is exothermic and, in the case of GO@Fe, is endothermic. Moreover, the two composites presented excellent selectivity of adsorption of the MB-dye from the MB/MO mixture.

摘要

氧化石墨烯（GO）在各种重金属离子（如铜（Cu）和铁（Fe）离子）的吸附过程中被大量使用，导致产生大量氧化石墨烯@金属离子复合物的废弃物。在本研究中，作者试图解决这个问题。在此，在GO表面负载二价（Cu）和三价（Fe）重金属离子，作为各种去除过程中重金属的模拟废弃物，分别形成GO@Cu和（GO@Fe）复合材料。之后，用先前制备的纳米复合材料去除阳离子亚甲基蓝（MB）染料。在吸附过程前后，用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、拉曼光谱和能量色散X射线光谱（EDS）对制备的复合材料进行表征。研究了两种复合材料对MB染料的各种吸附因素。根据吸附等温线信息，MB染料的吸附过程与朗缪尔模型高度拟合，最大吸附容量（mg/g）分别为（384.62，GO@Cu）和（217.39，GO@Fe）。根据热力学分析，MB在GO@Cu上的吸附反应是放热的，而在GO@Fe上的吸附反应是吸热的。此外，两种复合材料对MB/MO混合物中的MB染料表现出优异的吸附选择性。