title: 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.
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China.
authors.forename: Chenlu
authors.initials: C
authors.lastname: Jiao
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China.
authors.forename: Jiaqing
authors.initials: J
authors.lastname: Xiong
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Tao
authors.affiliation: Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
authors.forename: Sijun
authors.initials: S
authors.lastname: Xu
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China.
authors.forename: Desuo
authors.initials: D
authors.lastname: Zhang
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Lin
authors.affiliation: College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, PR China. Electronic address: chenyy@suda.edu.cn.
authors.forename: Yuyue
authors.initials: Y
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006244:Hardness; D006603:Hexuronic Acids / Q000737:chemistry; D006860:Hydrogen Bonding; D007700:Kinetics; D019216:Metals, Heavy / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D016062:Porosity
chemical_list: D000464:Alginates; D005782:Gels; D006603:Hexuronic Acids; D019216:Metals, Heavy; D010087:Oxides; D006108:Graphite; D020723:Glucuronic Acid
keywords: Adsorption; Aerogel; Graphene oxide; Sodium alginate; Strength; Toughness