Enhancement of CNT-based filters efficiency by ion beam irradiationстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 апреля 2018 г.
Аннотация:It is shown in the report that disorder produced by ion beam irradiation can enhance the
functionality of the carbon nanotubes. The filters of pressed multiwalled carbon nanotubes
(MWNTs) were irradiated by He+ ions of the energy E=80 keV with the fluence 2x1016
ion/cm2. The removal of manganese from aqueous solutions by using pristine and ion beam
irradiated MWNTs filters was studied as a function of pH, initial concentration of manganese
in aqueous solution, MWNT mass and contact time. The filters before and after filtration
were characterized by Raman (RS) and energy dispersive X-ray spectroscopy (EDS)
techniques to investigate the deposition content in the filter and defect formation in the
MWNTs. The irradiated samples showed an enhancement of removal efficiency of
manganese up to 97.5% for 10 ppm Mn concentration, suggesting that irradiated MWNT
filter is a better Mn adsorbent from aqueous solutions than the pristine one. Radiationinduced
chemical functionalization of MWNTs due to ion beam irradiation, suggesting that
complexation between the irradiated MWNTs and manganese ions is another mechanism.
This conclusion is supported by EDS and RS and is correlated with a larger disorder in the
irradiated samples as follows from RS. The study demonstrates that ion beam irradiation is a
promising tool to enhance the filtration efficiency of MWNT filters.