Three-dimensional network graphene oxide/sodium alginate aerogel beads with slit-shaped structure: synthesis, performance and selective adsorption mechanism for Cu(II)

2021 ◽  
pp. 106819
Author(s):  
Cheng Ji ◽  
Shuyi Yang ◽  
E Tao ◽  
Ying Cheng ◽  
Xin Hao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Sodium Alginate ◽  
Adsorption Mechanism ◽  
Selective Adsorption ◽  
Three Dimensional ◽  
Dimensional Network ◽  
Structure Synthesis

Study on the thermal insulation performance of the core–shell skeleton graphene oxide/carbon composite aerogel

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hongli Liu ◽  
Peng Wang ◽  
Wenjin Yuan ◽  
Hongyan Li
Keyword(s):  
Graphene Oxide ◽  
Solid Phase ◽  
Three Dimensional ◽  
Carbon Aerogel ◽  
Carbon Composite ◽  
Core Shell ◽  
Composite Aerogel ◽  
Dimensional Network ◽  
Heat Shielding ◽  
Insulation Performance

Abstract Phenolic resin (PR) was grafted onto the surface of graphene oxide (GO) through π–π conjugation and chemical bonding. After carbonization, organic compounds turned into carbon layers with a thickness of about 10 nm and coated on the surface of GO formed a core–shell structure. Besides, the adiabatic interface formed during organic carbonization can effectively connect the aerogels into a three-dimensional network. The optimum mass ratio of GO was determined to be 10 wt% in the preparation of the precursor aerogel. The adiabatic interfaces (carbon) between GO lamellae could effectively reduce the solid phase heat transfer in aerogels (thermal conductivity is 0.0457 W m−1 K−1). At the same time, the existence of GO also ensured better mechanical properties of GO/carbon composite aerogel (compressive strength is 2.43 MPa) compared with the pure carbon aerogel (1.52 MPa), demonstrating the excellent heat-shielding performance and mechanical property of GO/carbon aerogel.

scholarly journals Adsorption and release on three-dimensional graphene oxide network structures

2021 ◽  
Vol 8 (5) ◽  
pp. 201585
Author(s):  
Sunnam Kim ◽  
Sho Moriya ◽  
Sakura Maruki ◽  
Tuyoshi Fukaminato ◽  
Tomonari Ogata ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Near Infrared ◽  
Three Dimensional ◽  
Infrared Light ◽  
Cross Linking ◽  
Network Architectures ◽  
Emulsion System ◽  
Dimensional Network ◽  
Adsorption And Release ◽  
External Stimuli

In this study, three-dimensional network architectures are constructed using nano-sized graphene oxide (nGO) as the building block. The cross-linking reaction of nGO is conducted in sub-micrometre water droplets in an emulsion system to control the size of the networks by restricting the reaction space. Two types of three-dimensional GO networks with different cross-linking lengths were constructed, and their methyl orange adsorption and release behaviours were investigated under external stimuli, such as thermal treatment, ultrasonic wave treatment and near-infrared light irradiation.

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