High structure stability and outstanding adsorption performance of graphene oxide aerogel supported by polyvinyl alcohol for waste water treatment

被引：96

作者：

Dai, Jian ^{[1
]}

Huang, Ting ^{[1
]}

Tian, Su-qi ^{[1
]}

Xiao, Yan-jun ^{[1
]}

Yang, Jing-hui ^{[1
]}

Zhang, Nan ^{[1
]}

Wang, Yong ^{[1
]}

Zhou, Zuo-wan ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ China, Chengdu 610031, Peoples R China

来源：

MATERIALS & DESIGN | 2016年 / 107卷

基金：

中国国家自然科学基金;

关键词：

PVA-supported GO aerogel; Structure stability; Mechanical stability; Adsorption; Oil/water separation; CARBON NANOTUBE AEROGELS; GRAPHITE OXIDE; DOPED GRAPHENE; CONGO RED; PHOTOCATALYTIC DEGRADATION; 3-DIMENSIONAL NITROGEN; HYBRID AEROGELS; ULTRALIGHT; EFFICIENT; PURIFICATION;

D O I：

10.1016/j.matdes.2016.06.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, we developed a new kind of aerogel consisting of graphene oxide (GO) and polyvinyl alcohol(PVA), in which PVA exhibited a role to stabilize the 3D porous structure of GO. The PVA-supported GO aerogels were prepared through an environmentally friendly freeze-drying technique. The microstructure, the structure stability, the adsorption ability for different dyestuffs, and the oil/water separation of the aerogels were systematically investigated. The results demonstrated that the PVA-supported GO aerogels exhibited outstanding performances. First, the PVA-supported GO aerogels exhibited high structure stability, especially in the non-polar solvent, which was apparently different from the widely reported GO aerogels in the literatures which experienced structure collapse in the solvent, especially in water. Second, the aerogels also exhibited high absorption selectivity for dyes, especially for the dyes with positive charges; the adsorption efficiency was over 96%. Third, the PVA-supported GO aerogels still exhibited excellent oil/water separation ability and they can completely adsorb Sudan red/cyclohexane solution that floats on the water within 5 s. This work provides a simple and environmentally friendly method to obtain the versatile GO aerogel, which really has a great potential in the field of waste water treatment. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：187 / 197

页数：11

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