Insight into the Nanoscale Mechanism of Rapid H2O Transport within a Graphene Oxide Membrane: Impact of Oxygen Functional Group Clustering

2015 ◽  
Vol 8 (1) ◽  
pp. 321-332 ◽  
Author(s):  
Shuai Ban ◽  
Jing Xie ◽  
Yajun Wang ◽  
Bo Jing ◽  
Bei Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Group ◽  
Oxygen Functional Group ◽  
Oxide Membrane ◽  
Insight Into

Synthesis of Oxygen Functional Group-Controlled Monolayer Graphene Oxide

2021 ◽  
Vol 94 (9) ◽  
pp. 2195-2201
Author(s):  
Tatsuki Tsugawa ◽  
Kazuto Hatakeyama ◽  
Junko Matsuda ◽  
Michio Koinuma ◽  
Shintaro Ida
Keyword(s):  
Graphene Oxide ◽  
Functional Group ◽  
Monolayer Graphene ◽  
Oxygen Functional Group

scholarly journals Synthesis and Characterisations of Reduced Graphene Oxide Prepared by Microwave Irradiation with Sonication

2021 ◽  
Vol 32 (2) ◽  
pp. 1-13
Author(s):  
Fika Fauzi ◽  
Fayyad Azizi ◽  
Muhammad Miqdam Musawwa ◽  
Wipsar Sunu Brams Dwandaru
Keyword(s):  
Graphene Oxide ◽  
Microwave Irradiation ◽  
Mass Production ◽  
Functional Group ◽  
Scale Up ◽  
Synthesis Method ◽  
Oxygen Functional Group ◽  
Reduced Graphene ◽  
Uv Visible ◽  
Sonication Technique

Recently, reducing graphene oxide (GO) through microwave irradiation has been extensively explored in order to scale up the mass production of graphene. We report the simple technique to reduce GO by means of microwave irradiation combined with a sonication technique. The microwave-reduced GO (MWrGO) is formed by exposing a microwave onto GO powder in order to reduce the oxygen functional group and then followed by exfoliating via a sonication method. The time exposure of the microwave irradiation was 20 min with the powers of 450 W and 800 W. The UV-visible (UV-vis) spectra showed the evolution of GO into MWrGO indicated by the red shift of the absorption peak from 230 nm to 267 nm and disappearance of the shouldering peak at 300 nm. The reduction of the oxygen functional group has been proved by Fourier transform infrared (FTIR) spectra. Furthermore, the scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) data demonstrated further confirmation of the reduction of GO and the formation of basal planes of sp2 carbon clusters of the sample due to the treatment. The EDS spectra revealed that the MWrGO by 800-W-irradiation had much less oxygen functional groups and much more carbon content than GO. The proposed synthesis method is simple and readily controlled for a mass production of graphene from GO.

Oscillation in the electrical conductivity of a thick graphene oxide membrane

2021 ◽  
Vol 129 (23) ◽  
pp. 235105
Author(s):  
L. Jamilpanah ◽  
M. Alihosseini ◽  
S. Ghasemi ◽  
N. Hassani ◽  
F. Peymanirad ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Oxide Membrane

scholarly journals X-ray Photoelectron Spectroscopy Analysis of Chitosan–Graphene Oxide-Based Composite Thin Films for Potential Optical Sensing Applications

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 478
Author(s):  
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽  
Yap Wing Fen ◽  
Silvan Saleviter ◽  
Narong Chanlek ◽  
Hideki Nakajima ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Functional Group ◽  
Optical Sensing ◽  
Composite Thin Films ◽  
Cobalt Ions ◽  
X Ray ◽  
Sensing Applications

In this study, X-ray photoelectron spectroscopy (XPS) was used to study chitosan–graphene oxide (chitosan–GO) incorporated with 4-(2-pyridylazo)resorcinol (PAR) and cadmium sulfide quantum dot (CdS QD) composite thin films for the potential optical sensing of cobalt ions (Co2+). From the XPS results, it was confirmed that carbon, oxygen, and nitrogen elements existed on the PAR–chitosan–GO thin film, while for CdS QD–chitosan–GO, the existence of carbon, oxygen, cadmium, nitrogen, and sulfur were confirmed. Further deconvolution of each element using the Gaussian–Lorentzian curve fitting program revealed the sub-peak component of each element and hence the corresponding functional group was identified. Next, investigation using surface plasmon resonance (SPR) optical sensor proved that both chitosan–GO-based thin films were able to detect Co2+ as low as 0.01 ppm for both composite thin films, while the PAR had the higher binding affinity. The interaction of the Co2+ with the thin films was characterized again using XPS to confirm the functional group involved during the reaction. The XPS results proved that primary amino in the PAR–chitosan–GO thin film contributed more important role for the reaction with Co2+, as in agreement with the SPR results.

An insight into the binding behavior of graphene oxide and noble metal nanoparticles

2021 ◽  
Vol 129 (12) ◽  
pp. 125302
Author(s):  
Wajeeha Saeed ◽  
Zeeshan Abbasi ◽  
Shumaila Majeed ◽  
Sohail Anjum Shahzad ◽  
Abdul Faheem Khan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Binding Behavior ◽  
Insight Into

Fabrication of Graphene Oxide Membrane with Multiple “Plug-ins” for Efficient Dye Nanofiltration

2021 ◽  
pp. 119504
Author(s):  
Jia Pang ◽  
Xiaolei Cui ◽  
Yang Feng ◽  
Zhenji Guo ◽  
Guodong Kong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oxide Membrane
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