文章基本信息

标题：Strengthening of Graphene Aerogels with Tunable Density and High Adsorption Capacity towards Pb2+
本地全文：下载
作者：Zhuo Han ; Zhihong Tang ; Shuling Shen 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep05025
语种：English
出版社：Springer Nature
摘要：Graphene aerogels (GAs) with high mechanical strength, tunable density and volume have been prepared only via soaking graphene hydrogels (GHs) in ammonia solution. The density and volume of the obtained GAs are controlled by adjusting the concentration of ammonia solution. Although volume of the GAs decreases with increasing the concentration of ammonia solution, its specific surface area maintains at about 350 m² g⁻¹, and the inner structure changes to radial after ammonia solution treatment. Thus, GAs are particularly suitable for the adsorption and energy storage applications owing to their high specific surface area and unique porous structure. The adsorption capacity of GAs for Pb²⁺ from aqueous solution maintains at about 80 mg g⁻¹, which could reach as high as 5000 g m⁻³ per unit volume and they can be separated easily from water after adsorption.