Journal
SCIENCE OF ADVANCED MATERIALS
Volume 9, Issue 10, Pages 1847-1853Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/sam.2017.3193
Keywords
Iron Oxide; Manganese Oxide; Aqueous-Phase Synthesis; Nanoparticle; Iodine Removing
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2014R1A5A1009799]
- National Research Foundation of Korea (NRF) grant - Korean government (MSIP) [NRF-2015R1C1A1A01054109, NRF-2016R1E1A2A01939795, NRF-2016M3D1A1021140]
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The conventional synthesis of highly crystalline metal oxide nanoparticles requires either a reaction temperature of more than 300 degrees C or very high pressure, thus making their production economically infeasible. Here we report a simple aqueous-phase strategy for the synthesis of single-crystal metal oxide nanoparticles. Highly crystalline Fe3O4 and Mn3O4 nanoparticles were synthesized via the heating of an aqueous solution containing a metal precursor, branched polyethyleneimine (BPEI), and hexylamine at 95 degrees C for 3 h. The synthesized nanoparticles were characterized by a single crystal structure and good crystallinity. In this synthesis method, BPEI acts as the major capping agent for the formation of nano-sized particles and hexylamine acts as a weak base increasing the pH of the reaction solution, thus allowing the sol-gel reaction to form metal oxide nanoparticles. The synthesized Fe3O4 nanoparticles could be used as an efficient adsorbent for iodine removal from aqueous solutions using electrostatic attraction.
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