Facile fabrication of carboxylated cellulose nanocrystal–MnO2 beads for high-efficiency removal of methylene blue

As a sustainable nanomaterial, cellulose nanocrystal (CNC) based adsorbents exhibited great potential in wastewater treatment due to their high specific surface area, easy surface functionalization and excellent mechanical strength. Herein, a facile, green and energy-efficient method was proposed to...

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Bibliographic Details
Published in:Cellulose (London) 2020-08, Vol.27 (12), p.7053-7066
Main Authors: Diao, Huailing, Zhang, Zejun, Liu, Yunxiao, Song, Zhongqian, Zhou, Lijuan, Duan, Yongxin, Zhang, Jianming
Format: Article
Language:English
Subjects:
Alginates
Beads
Bioorganic Chemistry
Cellulose
Ceramics
Chemistry
Chemistry and Materials Science
Clean energy
Composites
Decoloring
Efficiency
Glass
Manganese dioxide
Methylene blue
Nanocomposites
Nanocrystals
Nanomaterials
Natural Materials
Organic Chemistry
Original Research
Physical Chemistry
Polymer Sciences
Recyclability
Regeneration
Sustainable Development
Wastewater treatment
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Summary:As a sustainable nanomaterial, cellulose nanocrystal (CNC) based adsorbents exhibited great potential in wastewater treatment due to their high specific surface area, easy surface functionalization and excellent mechanical strength. Herein, a facile, green and energy-efficient method was proposed to fabricate the CNC/manganese dioxide (MnO 2 )/alginate (ALG) beads. The hybrid CNC/MnO 2 nanocomposites were prepared by a simple and fine purification “one-pot” synthesis process and then anchored onto ALG networks directly to form the triphase beads in a continuous and automated mode. Interestingly, the CNC/MnO 2 /ALG beads exhibited excellent adsorption and oxidative degradation of methylene blue after a regeneration process. The decolorizing efficiency and capacity could reach up to 99.8% and 136.7 mg/g, respectively. Meanwhile, the CNC/MnO 2 /ALG beads can maintain their high efficiency (~ 95% of initial value) even after 10 cycles, indicating excellent recyclability and durability. It provides us a new route to design novel hybrid materials for environmental remediation. Graphic abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-020-03260-0