One- and two-dimensional carbon nanomaterials as adsorbents of cationic and anionic dyes from aqueous solutions

被引：7

作者：

Perez-Ramirez, E. E. ^{[1
,2
]}

de la Luz-Asuncion, M. ^{[1
]}

Martinez-Hernandez, A. L. ^{[1
]}

de la Rosa-Alvarez, G. ^{[2
]}

Fernandez-Tavizon, S. ^{[3
]}

Salas, P. ^{[4
]}

Velasco-Santos, C. ^{[1
]}

机构：

[1] Tecnol Queretaro, Div Estudios Posgrad & Invest, Tecnol Nacl Mexico, Santiago De Queretaro 76000, Queretaro, Mexico

[2] Univ Guanajuato, Dept Ingn Quim, Div Ciencias Nat & Exactas, Campus Guanajuato, Guanajuato 36050, Mexico

[3] Ctr Invest Quim Aplicada, Lab Nacl Mat Grafen, Saltillo 25294, Coahuila, Mexico

[4] Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Campus Juriquilla, Santiago De Queretaro 76000, Queretaro, Mexico

来源：

CARBON LETTERS | 2019年 / 29卷 / 02期

关键词：

Adsorption; Carbon nanomaterials; Dye removal; Pseudo second order; Langmuir model; REDUCED GRAPHENE OXIDE; ACTIVATED CARBON; METHYLENE-BLUE; ADSORPTION BEHAVIOR; REMOVAL; EQUILIBRIUM; ORANGE; NANOTUBES; OXIDATION; KINETICS;

D O I：

10.1007/s42823-019-00029-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

One- and two-dimensional carbon nanomaterials were tested as adsorbents for the elimination of two anionic dyes, reactive red 2 and methyl orange, and the cationic dye methylene blue from aqueous solutions under the same conditions. Carbon nanomaterials performed well in the removal of dyes. Surface oxygenated groups in the nanomaterials improved the cationic dyes' adsorption, but not the adsorption of the anionic dye. The interactions between nanomaterials and dyes were verified by infrared and Raman spectroscopy. The pseudo-second order kinetic model was better fitted to the kinetic experimental data than the Elovich and pseudo-first order models. The equilibrium adsorption data were best fitted by the Langmuir model. The dimensions and morphology of the carbon nanomaterials play an important role in the adsorption of the three dyes. The main mechanism of adsorption of anionic dyes is by the interactions of the aromatic rings of the dye structures and pi delocalized electrons on carbon nanostructures; the adsorption of cationic dye is mainly due to electrostatic interactions.

引用

页码：155 / 166

页数：12

共 38 条

[1] Adsorption of Nile Blue A from aqueous solution by different nanostructured carbon adsorbents [J].