A facile strategy to construct layered membranes with high and stable proton conductivity based on sulfonated graphene oxide

2021 ◽  
Author(s):  
Jin Jin ◽  
Jing Jia ◽  
Di Song ◽  
Ning Wang ◽  
Ke Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Sulfonated Graphene

Enhancement of proton conductivity of chitosan membrane enabled by sulfonated graphene oxide under both hydrated and anhydrous conditions

2014 ◽  
Vol 269 ◽  
pp. 898-911 ◽  
Author(s):  
Yahua Liu ◽  
Jingtao Wang ◽  
Haoqin Zhang ◽  
Chuanming Ma ◽  
Jindun Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Chitosan Membrane ◽  
Sulfonated Graphene

A highly proton-conducting, methanol-blocking Nafion composite membrane enabled by surface-coating crosslinked sulfonated graphene oxide

2016 ◽  
Vol 52 (10) ◽  
pp. 2173-2176 ◽  
Author(s):  
Guangwei He ◽  
Xueyi He ◽  
Xinglin Wang ◽  
Chaoyi Chang ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Film ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Surface Coating ◽  
Nafion Membrane ◽  
Methanol Permeability ◽  
High Proton Conductivity ◽  
High Proton ◽  
Sulfonated Graphene

Coating an ultrathin graphene oxide film onto a Nafion membrane confers a distinct anti-tradeoff behavior: 93% decrease of methanol permeability while retaining the high proton conductivity.

scholarly journals Mechanical Properties and Chemical Durability of Nafion/Sulfonated Graphene Oxide/Cerium Oxide Composite Membranes for Fuel-Cell Applications

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1375 ◽  
Author(s):  
Dong Chan Seo ◽  
Ikseong Jeon ◽  
Eun Suk Jeong ◽  
Jae Young Jho
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Cerium Oxide ◽  
Proton Conductivity ◽  
Polymer Electrolyte Membrane ◽  
Radical Scavenging ◽  
Composite Membranes ◽  
Chemical Durability ◽  
Sulfonated Graphene

To improve both the mechanical and chemical durability of Nafion membranes for polymer electrolyte membrane fuel-cells (PEMFCs), Nafion composite membranes containing sulfonated graphene oxide (SGO) and cerium oxide (CeO2; ceria) were prepared by solution casting. The structure and chemical composition of SGO were investigated by FT-IR and XPS. The effect of the sulfonation, addition of SGO and ceria on the mechanical properties, proton conductivity, and chemical stability were evaluated. The addition of SGO gave rise to an increase in the number of sulfonic acid groups in Nafion, resulting in a higher tensile strength and proton conductivity compared to that of graphene oxide (GO). Although the addition of ceria was found to decrease the tensile strength and proton conductivity, Nafion/SGO/ceria composite membranes exhibited a higher tensile strength and proton conductivity than recast Nafion. Measurement of the weight loss and SEM observations of the composite membranes after immersing in Fenton’s reagent indicate an excellent radical scavenging ability of ceria under radical degradation conditions.

TiO2/sulfonated graphene oxide/Ag nanoparticle membrane: In situ separation and photodegradation of oil/water emulsions

2018 ◽  
Vol 554 ◽  
pp. 16-25 ◽  
Author(s):  
Dongliang Qian ◽  
Dongyun Chen ◽  
Najun Li ◽  
Qingfeng Xu ◽  
Hua Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ag Nanoparticle ◽  
Sulfonated Graphene ◽  
In Situ Separation ◽  
Oil Water
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