Complex Formation via Hydrogen bonding between Rhodamine B and Montmorillonite in Aqueous Solution.
Complex Formation via Hydrogen bonding between Rhodamine B and Montmorillonite in Aqueous Solution.
复制标题
罗丹明 B 与蒙脱石在水溶液中通过氢键形成络合物
DOI：
10.1038/s41598-017-18057-8
复制
发表时间：
2018-01-10
影响因子：
4.6
通讯作者：
Ren ZJ
中科院分区：
文献类型：
--
作者：
Fang Y;Zhou A;Yang W;Araya T;Huang Y;Zhao P;Johnson D;Wang J;Ren ZJ
研究了蒙脱石(MMT)对硫代若丹明G(SRG)、未荷电/去质子罗丹明B(RhB)、橙II(或II)和甲基蓝(MB)四种含氮染料吸附机理的差异。蒙脱土对阳离子MB的吸附容量是未带电荷的RhB和阴离子SRG的3倍，而阴离子或II不被吸附。胶体蒙脱土颗粒有两种类型的表面，即基面和边面，它们与含氮染料的相互作用非常不同。采用原位漫反射红外傅里叶变换光谱(DIFTS)对蒙脱土的表面酸性进行了表征。对阳离子MB和RhB的吸附进行了比较。原位全反射傅里叶变换红外光谱(In-Sitatr-FTIR)表明，RhB上的氮原子与蒙脱土边缘的金属羟基通过水桥相连。高极性的边缘羟基对氢键的形成很重要。阳离子交换和洗涤实验，以及温度、pH和离子强度对吸附影响的研究，进一步阐明了吸附机理。我们的结果揭示了分子结构对粘土吸附含氮染料的影响，以及边表面在吸附过程中的作用。
This study investigates the adsorption mechanism differences among four nitrogenous dyes, sulforhodamine G (SRG), uncharged/deprotonated rhodamine B (RhB), orange II (Or II) and methyl blue (MB) by montmorillonite (MMT). MMT adsorption capacity for cationic MB was three times that of uncharged RhB and anionic SRG, while anionic Or II was not absorbed. Colloidal MMT particles have two types of surfaces, basal and edge, that interact with nitrogenous dyes very differently. The surface acidity of MMT was characterized with the pyridine adsorption method usingin-situdiffuse reflectance infrared Fourier transform spectroscopy (in-situDRIFTS). Adsorption of cationic MB was compared with the adsorption of RhB.In-situattenuated total reflectance Fourier transform infrared (in-situATR-FTIR) spectroscopy indicated that a nitrogen atom on RhB complexes with a metal hydroxyl on an MMT edge through a water bridge. The highly polar edge hydroxyl is important to hydrogen bond formation. Cation ion exchange and washing experiments, as well as studies on the effect of temperature, pH and ionic strength on adsorption further clarified the adsorption mechanism. Our results provide insights into the effects of molecular structure on the adsorption of nitrogenous dyes by clay and the role of edge surfaces in the adsorption process.
登录
查看更多内容
影响因子：
4.6
作者：
Chalasani, Rajesh;Gupta, Amit;Vasudevan, Sukumaran
通讯作者：
Vasudevan, Sukumaran
影响因子：
15.1
作者：
Elsherbiny, Abeer S.;El-Hefnawy, Mohamed E.;Gemeay, Ali H.
通讯作者：
Gemeay, Ali H.
废水中重金属和染料吸附平衡的热力学参数
影响因子：
11.4
作者：
Liu, Xiang;Lee, Duu-Jong
通讯作者：
Lee, Duu-Jong
影响因子：
8.8
作者：
Borisover, M;Graber, ER;Gerstl, Z
通讯作者：
Gerstl, Z
DOI：
10.1016/0166-6622(87)80268-8
发表时间：
1987-07-01
期刊：
COLLOIDS AND SURFACES
影响因子：
--
作者：
GRAUER, Z;MALTER, AB;AVNIR, D
通讯作者：
AVNIR, D