A water-insoluble viologen-based beta-cyclodextrin polymer for selective adsorption toward anionic dyes

作者：Li, Xuemei; Zhou, Mingjuan; Jia, Jiaxin; Jia, Qiong^*

来源：Reactive and Functional Polymers, 2018, 126: 20-26.

DOI：10.1016/j.reactfunctpolym.2018.03.004

• beta-cyclodextrin
• Viologens
• Anionic dyes
• Selective adsorption

The viologen-based beta-cyclodextrin polymer (V-CDP) was successfully prepared via a Menshutkin reaction for the first time, and its organic dyes uptake capacities were investigated. The synthesized polymer showed BET surface area of 22 m(2) g(-1) and exhibited highly charge-selective adsorption of anionic dyes, i.e. congo red and methyl orange. Remarkably, the polymer could efficiently absorb anionic dyes from binary cationic-anionic dye mixtures in a 1:1 mass ratio. The adsorption process of the two anionic dyes on the polymer both followed the pseudo-second-order rate equation and the Langmuir adsorption model. According to the Langmuir isotherm, the maximum adsorption capacity of V-CDP for congo red and methyl orange was calculated to be 323 mg g(-1) and 370 mg g(-1), respectively. Additionally, the polymer can be easily regenerated and reused at least 5 times with no loss of adsorption efficiency, demonstrating its potential application in dye removal.

• 出版日期2018-5
• 单位吉林大学