MnO2 nanoflakes/cellulose nanofibre aerogel fabricated via ultrasonication for high-performance water desalination

MnO 2 nanoflakes/cellulose nanofibre aerogel (MCNF) has been fabricated via the methods of redox reaction and ultrasonication. The SEM and TEM images demonstrate that the core-shell structure of ultrathin MCNF, possessing a 3D structure, was successfully obtained via ultrasonic control. Nitrogen ads...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2017-05, Vol.5 (2), p.958-959
Main Authors: Yao, Qiufang, Xiong, Ye, Wang, Hanwei, Wang, Chao, Sun, Qingfeng
Format: Article
Language:English
Subjects:
Adsorption
Aerogels
Cellulose
Desalination
Nanostructure
Sea water
Specific surface
Surface chemistry
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Summary:MnO 2 nanoflakes/cellulose nanofibre aerogel (MCNF) has been fabricated via the methods of redox reaction and ultrasonication. The SEM and TEM images demonstrate that the core-shell structure of ultrathin MCNF, possessing a 3D structure, was successfully obtained via ultrasonic control. Nitrogen adsorption analysis shows that the MCNF composites have a larger specific surface area compared with that of CNF, due to the inserted CNF inhibiting the aggregation of MnO 2 . The desalination capacity was evaluated by an adsorptive experiment, involving several ions (Ca 2+ , Mg 2+ , Na + and sea water) in aqueous solution. MCNF exhibited excellent desalination behaviour towards ions in sea water, depending on both the strength of the efficient positive ionic charge and ionic radius. More interestingly, the regenerated MCNF after initial HCl and subsequent KOH treatment could be repeatedly used after ten adsorption/desorption cycles without obvious degradation of the performance. Moreover, with high desalination efficiency and reusability, and ease of separation, the aerogel is a candidate for desalination in practical applications. MnO 2 nanoflakes/cellulose nanofibre aerogel (MCNF) has been fabricated via the methods of redox reaction and ultrasonication.
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta01469d