Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 297, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2021.113322
Keywords
Micromotors; Carbon dots; Water treatment; Dye removal; Nanozyme; Environmental remediation
Categories
Funding
- DBT, Govt. of India [BT/PR40544/COD/139/14/2020]
- Science and Engineering Research Board, Govt. of India [PDF/2016/002910]
- Department of Chemistry [DRS-II (SAP)]
- Department of Chemistry [DST (FIST)]
- Department of Chemistry [DST (PURSE)]
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This study presents an innovative solution for water purification using catalytic magnetic microbots developed by functionalizing iron oxide nanoparticles with carbon dots. These microbots show promising speed for degrading toxic dyes efficiently and can be used sustainably for large scale water treatment.
Biodegradable precursors for micro/nanobots development are key requirements for several sustainable applications. In this regard, we propose an innovative solution for water purification at minimum cost and efforts where organic waste is used for the treatment of organic pollutants. Herein, catalytic magnetic microbots were developed by functionalizing iron oxide nanoparticles with carbon dots (C-Dots), which were synthesized by using household waste such as potato peels as precursors. The speed of these autonomously propelling bots indeed is found very promising for large distance swimming even in viscous medium by using hydrogen peroxide as fuel. These microbots catalytically propel and degrade toxic polar as well as sparingly water-soluble industrial dyes without any external agitation. The degradation of dyes was confirmed by mass-spectra analysis. Furthermore, these microbots can efficiently degrade a mixture of dyes and reused without compromising its performance significantly. Additionally, rate constant (K) and activation energy (Ea) were also determined to establish the catalytic nature of the bots. The present microbots acted as nanozyme owing to its synergistic catalytic activity of Fe3O4 and C-Dots for degradation of mixture of toxic dyes, essential for large scale water treatment.
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