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In this work, we apply a one-step direct current arc discharge method to synthesize graphite-encapsulated magnetic nanoparticles functionalized with a high concentration of amino groups uniformly without further modification or any other pre/post-treatment procedures. The synthesis was accomplished by adding different molar ratios of NH3 into He/CH4 gas mixture under various gas pressures. The optimized...
In this paper, nanoscale zero-valent iron (NZVI) immobilized on carbon nanotube (CNT) composite (NZVI/CNT) was prepared, characterized and used for the sequestration of Se(IV) in water. The structural analysis revealed that NZVI were uniformly immobilized on CNT surfaces, and thus the oxidation and aggregation of NZVI was obviously minimized. Compared to bare NZVI, the NZVI/CNT exhibited much higher...
The performance of Pt catalyst supported on carbon nanowall (CNW) and vertically aligned carbon nanofiber (VACNF) for methanol electro-oxidation has been compared. Pt/CNW and Pt/VACNF electrodes were fabricated by growing CNW and VACNF on carbon papers with inductively coupled plasma enhanced chemical vapor deposition, followed by sputter deposition of Pt nanoparticles using a radio-frequency magnetron...
Multiwall carbon nanotubes (MWCNTs) were modified by using a microwave-excited NH 3 /Ar surface-wave plasma. Changes in the atom composition and structural properties of the modified MWCNTs were studied as a function of gas flow rate, treatment time, microwave power, and bias voltage by using X-ray photoelectron spectroscopy and Raman spectroscopy. The results suggest that nitrogen-containing...
Batch experiments were conducted to elucidate the adsorption of a widely used anionic surfactant (sodium dodecylbenzene sulfonate (SDBS)) and nickel on multiwalled carbon nanotubes (MWCNTs). Counterion effect on the removal of SDBS and nickel by using MWCNTs was also studied. The microscopic changes of MWCNTs before and after nickel and SDBS adsorption were characterized by scanning electron microscope...
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