Page 74 - 《精细化工》2020年第5期

第 37 卷第 5 期 精 细 化 工 Vol.37, No.5
202 0 年 5 月 FINE CHEMICALS May 2020

功能材料
GO/GA-g-PAMPS 复合水凝胶的制备及其对

阳离子染料的吸附性能

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何梦奇，徐继红 ，段贤扬，甘 颖
（安徽理工大学 化学工程学院，安徽 淮南 232001）

摘要：以自制氧化石墨烯（GO）、阿拉伯胶（GA）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）为原料，采用一
步水热法制备了 GO/GA-g-PAMPS 复合水凝胶，利用 FTIR、XRD、SEM 对复合水凝胶结构进行了表征。
考察了水凝胶对阳离子染料亚甲基蓝（MB）和结晶紫（CV）的吸附性能。结果显示：在 GO 质量浓度为
0.3 g/L、凝胶用量为 0.05 g、溶液 pH 为 7、温度为 50 ℃、染料初始质量浓度为 200 mg/L 时，凝胶对 MB
和 CV 的吸附量和吸附率分别为 395.68、381.70 mg/g 和 98%、96%。经 5 次循环后，凝胶对 MB 和 CV 的
吸附率仍能达到 82.6%和 81.2%。吸附等温线和动力学研究表明，凝胶对 MB 吸附更符合 Freundlich 模型，
对 CV 的吸附更符合 Langmuir 模型，准二级动力学模型能更好地描述两种阳离子染料的吸附过程。热力学
研究表明，水凝胶对两种染料吸附是自发、吸热和混乱度增加的过程。
关键词：氧化石墨烯；阿拉伯胶；吸附；复合水凝胶；阳离子染料；功能材料
中图分类号：TQ424.3；O647.33 文献标识码：A 文章编号：1003-5214 (2020) 05-0924-09

Preparation of GO/GA-g-PAMPS composite hydrogels and its
adsorption properties for cationic dyes

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HE Mengqi, XU Jihong , DUAN Xianyang, GAN Ying
（School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China）

Abstract: GO/GA-g-PAMPS composite hydrogels were prepared by one-step hydrothermal reaction using
self-made graphene oxide (GO), gum arabic (GA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS)
as raw materials. The structure of composite hydrogels was characterized by FTIR, XRD and SEM. The
adsorption properties of the hydrogel for cationic dyes, methylene blue (MB) and crystal violet (CV) were
investigated. The results showed that when the mass concentration of GO was 0.3 g/L, the dosage of the
hydrogel was 0.05 g, pH of the solution was 7, temperature was 50 ℃, and initial concentration of dyes
was 200 mg/L, the adsorption capacity of the hydrogel for MB and CV were 395.68 and 381.70 mg/g, and
the corresponding adsorption rates were 98% and 96%. After 5 cycles, the adsorption rates of MB and CV
were still up to 82.6% and 81.2%. The adsorption isotherms and kinetics revealed that the adsorption of the
hydrogel for MB was more consistent with Freundlich model, while that for CV was more consistent with
Langmuir model. The quasi-second-order kinetic model could better describe the adsorption process of the
hydrogel for two cationic dyes. Thermodynamic studies indicated that the adsorption process was
spontaneous, endothermic and chaotic.
Key words: graphene oxide; gum arabic; adsorption; composite hydrogel; cationic dyes; functional
materials

收稿日期：2019-10-17; 定用日期：2019-12-20; DOI: 10.13550/j.jxhg.20190986
基金项目：安徽高校自然科学研究项目（KJ2016A197）
作者简介：何梦奇（1994—），女，硕士生。联系人：徐继红（1968—），女，副教授，E-mail：ahlgxjh@sina.com。