石墨烯/SiO<sub>2</sub>气凝胶对苯、甲苯水溶液的吸附

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Abstract

This paper used tetraethoxysilane (TEOS) and graphene oxide (GO) as the raw materials.Graphene/silica aerogels (GS) with different content of GO were synthesized via sol-gel method, combined with surface modification, ambient drying process and high temperature reduction. Through the consider of the density and the specific surface area, the best GS was obtained and the adsorption of benzene and toluene solution was studied compared with the activated carbon and SiO₂ aerogel. The results show that the specific surface area of the silica gel is improved greatly by the addition of 3% GO, which made the porous and homogeneous structure. The density is 160kg/m³, the specific surface area and pore diameter are 1039m²/g and 16.56nm, respectively. The adsorption of benzene and toluene reaches 180mg/gand 210mg/g, respectively. They are approximately 2.5 times of the amount of activated carbon adsorption. The adsorption process was in accordance with the Langmuir isotherm model.

Key words： graphene surface modification aerogel Langmuir adsorption isotherm benzene toluene solution

Received: 12 July 2016

PACS:

X703.5

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I3/972

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