Iridium-Catalyst-Based Autonomous Bubble-Propelled Graphene Micromotors with Ultralow Catalyst Loading
A novel concept of an iridium‐based bubble‐propelled Janus‐particle‐type graphene micromotor with very high surface area and with very low catalyst loading is described. The low loading of Ir catalyst (0.54 at %) allows for fast motion of graphene microparticles with high surface area of 316.2 m2 g−...
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Published in | Chemistry : a European journal Vol. 20; no. 46; pp. 14946 - 14950 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
10.11.2014
WILEY‐VCH Verlag Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | A novel concept of an iridium‐based bubble‐propelled Janus‐particle‐type graphene micromotor with very high surface area and with very low catalyst loading is described. The low loading of Ir catalyst (0.54 at %) allows for fast motion of graphene microparticles with high surface area of 316.2 m2 g−1. The micromotor was prepared with a simple and scalable method by thermal exfoliation of iridium‐doped graphite oxide precursor composite in hydrogen atmosphere. Oxygen bubbles generated from the decomposition of hydrogen peroxide at the iridium catalytic sites provide robust propulsion thrust for the graphene micromotor. The high surface area and low iridium catalyst loading of the bubble‐propelled graphene motors offer great possibilities for dramatically enhanced cargo delivery.
Built for speed: Iridium‐catalyst‐based bubble‐propelled graphene micromotors are described (see picture). The ultralow catalyst loading and large surface area provide great opportunities for future applications in biomedical and environmental areas. |
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Bibliography: | ArticleID:CHEM201404238 ark:/67375/WNG-C5BH82XL-5 istex:69825587085609A92A2D7E4028E4F916B50D184C Ministry of Education, Singapore - No. RG99/13 MSMT - No. 20/2014 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0947-6539 1521-3765 |
DOI: | 10.1002/chem.201404238 |