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Synthesis and Evaluation of Zeolitic Janus Micromotors for Water Remediation

Abedini, Fatemeh | 2021

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 53586 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Madah Hosseini, Hamid Reza
  7. Abstract:
  8. Novel zeolite-based micromotors consisted of silver-exchanged zeolite core and three different partial catalytic coatings (Mg/Au, Pt and Ag) were synthesized to eliminate the biological and chemical contamination from water in a fast and efficient way. These engines are benefited by the adsorption capacity and antibacterial activity of silver-zeolites in combination with the autonomous propulsion of catalytic micromotors. The remarkable bactericidal capacity of these particles relies on reactive silver ion released from zeolite and accordingly, increased chance of contact with bacteria during movement. These motors showed rapid killing of bacteria and effective elimination of the Pseudomonas aeruginosa cells in a very short times less than 5 minutes for Ag coated micromotors. The removal performance of motors from heavy metals such as cobalt (Co2+), nickel (Ni2+) and lead (Pb2+) ions was also investigated at room temperature during 12 hours. The maximum removal efficiency for Co2+, Ni2+ and Pb2+ was calculated as 87%, 78% ,and 93%, respectively. The heavy metal uptake capacity of micromotors was superior to zeolite particles, especially within the first 20 minutes of contact. The results indicated that the development of zeolitic micromotors led to a new distinct strategy for both bacteria-killing and heavy metal removal in the water purification
  9. Keywords:
  10. Catalytic Micromotor ; Self Propulsion ; Water Treatment ; Zeolite ; Heavy Metals Removal ; Biological Decontamination

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