Electrokinetic Enhancement of Water Flux and Ion Rejection through Graphene Oxide/Carbon Nanotube Membrane

2020 ◽  
Vol 54 (23) ◽  
pp. 15433-15441
Author(s):  
Haiguang Zhang ◽  
Xie Quan ◽  
Shuo Chen ◽  
Hongtao Yu ◽  
Junfeng Niu
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Water Flux ◽  
Ion Rejection

scholarly journals Eco-Friendly Reduced Graphene Oxide Nanofilter Preparation and Application for Iron Removal

Separations ◽  
2021 ◽  
Vol 8 (5) ◽  
pp. 68
Author(s):  
Pankaj Kumar Jha ◽  
Watsa Khongnakorn ◽  
Chamorn Chawenjkigwanich ◽  
Md Shahariar Chowdhury ◽  
Kuaanan Techato
Keyword(s):  
Contact Angle ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Inductively Coupled Plasma ◽  
Membrane Filter ◽  
Water Flux ◽  
Water Filtration ◽  
Dimethyl Formamide ◽  
Reduced Graphene ◽  
Callistemon Viminalis

In this paper, the green synthesis of reduced graphene oxide (r-GO) nanomaterials using Callistemon viminalis leaf extract as a reducing and stabilizing agent is reported for the first time. The synthesized r-GO nanomaterials were characterized using UV–Vis, XRD, FE-SEM, TEM, and energy dispersive X-ray (EDX) analyses. The nanofilter membrane was prepared by varying the amounts of r-GO nanomaterials in a Polysulfone-N,N-dimethyl formamide (DMF) solution. The nanofilter membrane was characterized by the contact angle, atomic force microscopy (AFM), UV–Vis, and FTIR. The results confirm the formation of r-GO nanomaterials. Higher amounts of r-GO nanomaterials in the membrane show a lower contact angle, thus confirming their hydrophilic nature. Iron water filtration was performed with different amounts of r-GO nanomaterials in the membrane filter, and the water flux was smooth over an increased time period. Inductively Coupled Plasma (ICP) analysis showed a higher percentage of iron rejection (95.77%) when higher amounts (0.10 g) of r-GO nanomaterials were used in a mixed membrane (i.e., sample C). In conclusion, the findings illustrate that Callistemon viminalis mediates the synthesis of r-GO nanomaterials, which is useful in water filtration, and can be incorporated into membrane filters, since it removes iron.

Unique synergistic effects of graphene oxide and carbon nanotube hybrids on the tribological properties of polyimide nanocomposites

2018 ◽  
Vol 117 ◽  
pp. 217-224 ◽  
Author(s):  
Chunying Min ◽  
Dengdeng Liu ◽  
Chen Shen ◽  
Qiaqia Zhang ◽  
Haojie Song ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Tribological Properties ◽  
Synergistic Effects
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