Preparation of Carbon Nanotubes/Activated Carbon Composite Microspheres and Their Application to Adsorption of VB12

2009 ◽  
Vol 25 (08) ◽  
pp. 1697-1702 ◽  
Author(s):  
LU Yue-Mei ◽  
◽  
◽  
GONG Qian-Ming ◽  
LIANG Ji
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Carbon Composite ◽  
Composite Microspheres

Multi-walled carbon nanotubes and activated carbon composite material as electrodes for electrochemical capacitors

2021 ◽  
Vol 33 ◽  
pp. 100738 ◽  
Author(s):  
Rafael Vicentini ◽  
Willian G. Nunes ◽  
Lenon H. da Costa ◽  
Leonardo M. Da Silva ◽  
Bruno Freitas ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Activated Carbon ◽  
Electrochemical Capacitors ◽  
Carbon Composite ◽  
Carbon Composite Material ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Synthesis of porous carbon nanotubes/activated carbon composite spheres and their application for vitamin B12 adsorption

2014 ◽  
Vol 21 (2) ◽  
pp. 165-171 ◽  
Author(s):  
Yuemei Lu ◽  
Qianming Gong ◽  
Fangping Lu ◽  
Ji Liang
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Vitamin B12 ◽  
Suspension Polymerization ◽  
Nitrogen Adsorption ◽  
Carbon Composite ◽  
Steam Activation ◽  
Large Molecules ◽  
Particle Size Analyzer ◽  
Adsorption Desorption

AbstractIn this paper, carbon nanotubes (CNTs) were added to activated carbon to enhance the mesopores. At first, different amounts of CNTs were added to phenolic resin and composite spheres were synthesized by suspension polymerization. Then, by carbonizing these spheres at 600°C followed by steam activation at 850°C for more than 90 min, we prepared highly developed porous CNTs/activated carbon composite spheres. The composite spheres were characterized by a laser particle size analyzer, scanning electron microscopy, Raman spectrum, and nitrogen adsorption-desorption isotherms. Results showed that the composite spheres had good sphericity even with high proportion of CNTs (45 wt.%). Analysis also showed that the pore size distribution of the composite spheres containing CNTs was “multi-peak”, especially with 20–100-nm pores. The improved 20–100-nm porous structures in the composite spheres can be ascribed to aggregated pores of CNT bundles. The amount of vitamin B12 adsorbed on the 45 wt.% CNT composite spheres was as high as 32.38 mg/g. The spheres could be used as adsorbents for middle-molecular-weight toxins or large molecules in hemoperfusion.

scholarly journals Robust, flexible, freestanding and high surface area activated carbon and multi-walled carbon nanotubes composite material with outstanding electrode properties for aqueous-based supercapacitors

2021 ◽  
Author(s):  
Bruno Freitas ◽  
Willian G. Nunes ◽  
Davi Marcelo Soares ◽  
Fernando C. Rufino ◽  
Cássio Murilo Moreira ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Activated Carbon ◽  
Composite Electrode ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Composite ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Composite Electrode ◽  
Walled Carbon Nanotubes

This novel carbon–carbon composite electrode has superlative electrochemical properties with flexibility, mechanical robustness, and weldability.

scholarly journals Microwave Irradiation Assisted Preparation of Chitosan Composite Microsphere for Dye Adsorption

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoyu Chen ◽  
Lindun He
Keyword(s):  
Activated Carbon ◽  
Methyl Orange ◽  
Microwave Irradiation ◽  
Adsorption Capacity ◽  
Dye Adsorption ◽  
Carbon Composite ◽  
Cross Linking ◽  
Carbon Powder ◽  
Composite Microsphere ◽  
Composite Microspheres

Chitosan-activated carbon composite microspheres were prepared by emulsion cross-linking method and its adsorption properties for methyl orange were studied. Chitosan solution was mixed with activated carbon powder and then chitosan was cross-linked by epichlorohydrin under microwave irradiation. SEM photos show that the composite microspheres have diameters of 200–400 μm and activated carbon powder dispersed on the surface of composite microsphere. FTIR spectrum indicates chitosan is successfully cross-linked. Microwave irradiation can effectively shorten the cross-linking time. Composite microspheres have enhanced dye adsorption capacity for methyl orange compared to chitosan microspheres. Kinetic studies showed that the adsorption followed a pseudo-second-order model. Isotherm studies show that the isotherm adsorption equilibrium is better described by Freundlich isotherm. Regeneration results show that adsorption capacity of composite microsphere decreased about 5.51% after being reused for three times. These results indicated that chitosan-activated carbon composite microsphere has potential application in the removal of dye from wastewaters.

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