Co-adsorption of an anionic dye in the presence of a cationic dye and a heavy metal ion by graphene oxide and photoreduced graphene oxide.
Co-adsorption of an anionic dye in the presence of a cationic dye and a heavy metal ion by graphene oxide and photoreduced graphene oxide.
复制标题
氧化石墨烯和光还原氧化石墨烯在阳离子染料和重金属离子存在下对阴离子染料的共吸附
DOI：
10.1039/c8ra09438a
复制
发表时间：
2019-02-11
期刊：
影响因子：
3.9
通讯作者：
Jia, Suotang
中科院分区：
文献类型：
--
作者：
Zhang, Xiaorong;Qin, Chengbing;Gong, Yani;Song, Yunrui;Zhang, Guofeng;Chen, Ruiyun;Gao, Yan;Xiao, Liantuan;Jia, Suotang
为研究相同条件下不同吸附剂和共吸附物对污染物的吸附行为，考察了氧化石墨烯（GO）和光还原GO（PRGO）在单组分体系中以及在阳离子亚甲基蓝（MB）染料和重金属离子Pb 2+存在下对阴离子橙子II（OII）染料的吸附能力.在这项工作中，通过太阳光照射GO分散体来制备PRGO。采用傅里叶变换红外光谱、X射线光电子能谱、X射线衍射、拉曼光谱、原子力显微镜、扫描电子显微镜和透射电子显微镜对GO和PRGO进行了表征。研究了GO和PRGO单组分和双组分体系对OII、MB和Pb ~（2+）的吸附等温线，并用Langmuir模型进行了分析。在单一体系中，在太阳光照射后，GO对OII的吸附容量可从8.4mg g-1提升至32.5mg g-1。而MB和Pb ~（2+）的吸附量不受光还原过程的影响。在二元体系中，MB和Pb 2+存在下，OII的吸附具有显著的协同效应，其中PRGO对OII的吸附容量从8.4 mg g−1提高到295 mg g−1和105 mg g−1，分别提高了35倍和12.5倍。相反，OII的存在导致MB和Pb 2+的吸附上的温和的拮抗作用。这些结果表明，无论是阳离子染料还是重金属离子，石墨烯基材料对阴离子染料的吸附都能得到显著改善，具有重要的实际应用价值。
To investigate the adsorption behavior of contaminants with different adsorbents and co-adsorbates under identical conditions, the adsorption capacities of anionic orange II (OII) dye onto graphene oxide (GO) and photoreduced GO (PRGO) in a single-component system and in the presence of cationic methylene blue (MB) dye as well as heavy metal ion Pb2+ were explored. In this work, PRGO was prepared by solar light irradiation of a GO dispersion. GO and PRGO were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy, atomic force microscopy, scanning electron microscopy, and transmission electron microscopy. The adsorption isotherms of OII, MB, and Pb2+ onto GO and PRGO in single and binary systems have been studied and analyzed by the Langmuir model. In the single system, the adsorption capacity of OII on GO can be promoted from 8.4 mg g−1 to 32.5 mg g−1 after solar light irradiation. While the adsorption capacities of MB and Pb2+ are not affected by the photoreduction process. In the binary system, a marked synergistic effect for the adsorption of OII has been determined in the presence of both MB and Pb2+, where the adsorption capacity of OII on PRGO has been improved from 8.4 mg g−1 to 295 mg g−1 and 105 mg g−1, enhancements of 35- and 12.5-fold, respectively. In contrast, the presence of OII leads to a mildly antagonistic effect on the adsorption of MB and Pb2+. These findings show that the adsorption of anionic dyes by graphene-based materials can be strongly improved in the presence of either cationic dyes or heavy metal ions, which will be of great value in practical applications.
登录
查看更多内容
影响因子：
3.9
作者：
Jafari, Maryam;Rahimi, Mahmood Reza;Dashtian, Kheibar
通讯作者：
Dashtian, Kheibar
影响因子：
15
作者：
Gallivan, JP;Dougherty, DA
通讯作者：
Dougherty, DA
DOI：
10.1016/j.pnsc.2015.10.004
发表时间：
2015-10-01
影响因子：
4.7
作者：
Gong, Youning;Li, Delong;Pan, Chunxu
通讯作者：
Pan, Chunxu
一种低温制备高度还原氧化石墨烯的方法
影响因子：
16.6
作者：
Feng, Hongbin;Cheng, Rui;Li, Jinghong
通讯作者：
Li, Jinghong
一种改进的 Hummers 方法，用于环保合成氧化石墨烯
影响因子：
10.9
作者：
Chen, Ji;Yao, Bowen;Shi, Gaoquan
通讯作者：
Shi, Gaoquan