A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Adsorption of Ca2＋ on single layer graphene oxide
Graphene oxide（GO） holds great promise for a broad array of applications in many fields,but also poses serious potential risks to human health and the environment.In this study,the adsorptive properties of GO toward Ca~（2＋） and Na＋were investigated using batch adsorption experiments,zeta potential measurements,and spectroscopic analysis.When pH increased from 4 to 9,Ca~（2＋）adsorption by GO and the zeta potential of GO increased significantly.Raman spectra suggest that Ca~（2＋）was strongly adsorbed on the GO via –COO Ca~＋ formation.On the other hand,Na＋was adsorbed into the electrical diffuse layer as an inert counterion to increase the diffuse layer zeta potential.While the GO suspension became unstable with increasing pH from 4 to 10 in the presence of Ca~（2＋）,it was more stable at higher pH in the NaC l solution.The findings of this research provide insights in the adsorption of Ca~（2＋）on GO and fundamental basis for prediction of its effect on the colloidal stability of GO in the environment.
Adsorption of Ca2＋ on single layer graphene oxide
Graphene oxide（GO） holds great promise for a broad array of applications in many fields,but also poses serious potential risks to human health and the environment.In this study,the adsorptive properties of GO toward Ca~（2＋） and Na＋were investigated using batch adsorption experiments,zeta potential measurements,and spectroscopic analysis.When pH increased from 4 to 9,Ca~（2＋）adsorption by GO and the zeta potential of GO increased significantly.Raman spectra suggest that Ca~（2＋）was strongly adsorbed on the GO via –COO Ca~＋ formation.On the other hand,Na＋was adsorbed into the electrical diffuse layer as an inert counterion to increase the diffuse layer zeta potential.While the GO suspension became unstable with increasing pH from 4 to 10 in the presence of Ca~（2＋）,it was more stable at higher pH in the NaC l solution.The findings of this research provide insights in the adsorption of Ca~（2＋）on GO and fundamental basis for prediction of its effect on the colloidal stability of GO in the environment.
Adsorption of Ca2＋ on single layer graphene oxide
2017
Article (Journal)
English
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