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Title: Formation of metal clusters in halloysite clay nanotubes

We developed ceramic core-shell materials based on abundant halloysite clay nanotubes with enhanced heavy metal ions loading through Schiff base binding. These clay tubes are formed by rolling alumosilicate sheets and have diameter of c.50 nm, a lumen of 15 nm and length ~1 μm. This allowed for synthesis of metal nanoparticles at the selected position: (1) on the outer surface seeding 3-5 nm metal particles on the tubes; (2) inside the tube’s central lumen resulting in 10-12 nm diameter metal cores shelled with ceramic wall; and (3) smaller metal nanoparticles intercalated in the tube’s wall allowing up to 9 wt% of Ru, and Ag loading. These composite materials have high surface area providing a good support for catalytic nanoparticles, and can also be used for sorption of metal ions from aqueous solutions.
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  1. I. Gubkin Russian State Univ. of Oil and Gas, Moscow (Russia). Dept. of Physical and Colloid Chemistry
  2. WPI International Center for Materials Nanoarchitectonics (WPI-MANA), Tsukuba (Japan). National Inst. for Materials Science
  3. Louisiana Tech Univ., Ruston, LA (United States). Inst. for Micromanufacturing
Publication Date:
Grant/Contract Number:
SC0012432; 14-19-01045
Accepted Manuscript
Journal Name:
Science and Technology of Advanced Materials
Additional Journal Information:
Journal Volume: 18; Journal Issue: 1; Journal ID: ISSN 1468-6996
IOP Publishing
Research Org:
Louisiana Tech Univ., Ruston, LA (United States)
Sponsoring Org:
USDOE Office of Science (SC); Russian Science Foundation
Country of Publication:
United States
36 MATERIALS SCIENCE; Halloysite nanotubes; metals intercalation; core-shell; clay
OSTI Identifier: