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Sodium alginate/graphene oxide aerogel with enhanced strength-toughness and its heavy metal adsorption study.

Abstract：

:Ordered porous sodium alginate/graphene oxide (SAGO) aerogel was fabricated by in situ crosslinking and freeze-drying method. GO, as reinforcing filler, can be easily incorporated with SA matrix by self-assembly via hydrogen bonding interaction. Compared with pure SA aerogel, the as-prepared SAGO exhibited excellent mechanical strength and elasticity, and the compression strength of SAGO can reach up to 324 kPa and remain 249 kPa after five compression cycles when 4 wt% GO was added, which were considered significant improvements. SEM result presents that the addition of GO obviously improves the porous structures of aerogel, which is beneficial for the enhancement of strength-toughness and adsorbability. As a consequence, the adsorption process of SAGO is better described by pseudo-second-order kinetic model and Langmuir isotherm, with maximum monolayer adsorption capacities of 98.0 mg/g for Cu2+ and 267.4 mg/g for Pb2+, which are extremely high adsorption capacities for metal ions and show far more promise for application in sewage treatment.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Jiao C,Xiong J,Tao J,Xu S,Zhang D,Lin H,Chen Y

doi

10.1016/j.ijbiomac.2015.11.061

subject

Has Abstract

pub_date

2016-02-01 00:00:00

pages

133-41

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(15)30156-2

journal_volume

83

pub_type

杂志文章

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