PMID- 36408765 OWN - NLM STAT- MEDLINE DCOM- 20230119 LR - 20230207 IS - 2366-9608 (Electronic) IS - 2366-9608 (Linking) VI - 7 IP - 1 DP - 2023 Jan TI - Soft Magnetic Microrobots for Photoactive Pollutant Removal. PG - e2201014 LID - 10.1002/smtd.202201014 [doi] AB - "Soft" robotics based on hydrogels appears as an alternative to the traditional technology of "hard" robotics. Soft microrobots are employed for drug delivery and cell manipulation. This work develops magnetic hydrogel-based microrobots using chitosan (CHI) as the body of the micromotor and Fe(3) O(4) nanoparticles to allow for its magnetic actuation. In addition, ZnO nanoparticles are incorporated inside the CHI body of the microrobot to act as an active component for pollutants photodegradation. CHI@Fe(3) O(4) -ZnO microrobots are used for the efficient photodegradation of persistent organic pollutants (POPs). The high absorption of CHI hydrogel enhances the POP photodegradation, degrading it 75% in just 30 min. The adsorption-degradation and magnetic properties of CHI@Fe(3) O(4) -ZnO microrobots are used in five cycles while maintaining up to 60% photodegradation efficiency. The proof-of-concept present in this work represents a simple way to obtain soft microrobots with magnetic actuation and photodegradation functionalities for several water purification applications. CI - (c) 2022 Wiley-VCH GmbH. FAU - Maria-Hormigos, Roberto AU - Maria-Hormigos R AD - Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 616628, Prague, Czech Republic. FAU - Mayorga-Martinez, Carmen C AU - Mayorga-Martinez CC AD - Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 616628, Prague, Czech Republic. FAU - Pumera, Martin AU - Pumera M AUID- ORCID: 0000-0001-5846-2951 AD - Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 616628, Prague, Czech Republic. AD - Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, South Korea. AD - Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, 70800, Ostrava, Czech Republic. AD - Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 40402, Taiwan. LA - eng GR - CZ.02.1.01/0.0/0.0/15_003/0000444/Advanced Functional Nanorobots"/ GR - NU21-08-00407/Ministry of Health of the Czech Republic/ GR - LL2002/Ministry of Education, Youth and Sports/ PT - Journal Article DEP - 20221121 PL - Germany TA - Small Methods JT - Small methods JID - 101724536 RN - 0 (Environmental Pollutants) RN - SOI2LOH54Z (Zinc Oxide) RN - 0 (Hydrogels) SB - IM MH - *Environmental Pollutants MH - *Zinc Oxide MH - Magnetics MH - Hydrogels MH - Magnetic Phenomena OTO - NOTNLM OT - chitosan OT - hydrogel OT - magnetic-driven microrobots OT - nano/micromotors OT - soft robotics EDAT- 2022/11/22 06:00 MHDA- 2023/01/20 06:00 CRDT- 2022/11/21 05:32 PHST- 2022/10/24 00:00 [revised] PHST- 2022/08/03 00:00 [received] PHST- 2022/11/22 06:00 [pubmed] PHST- 2023/01/20 06:00 [medline] PHST- 2022/11/21 05:32 [entrez] AID - 10.1002/smtd.202201014 [doi] PST - ppublish SO - Small Methods. 2023 Jan;7(1):e2201014. doi: 10.1002/smtd.202201014. Epub 2022 Nov 21.