In situ preparation of core-satellites nanostructural magnetic-Au NPs composite for catalytic degradation of organic contaminants

摘要: In this work, core-satellites nanostructural composites have been synthesized through self-assembly combined with in situ growth strategy for catalytic degradation of common organic contaminants. At first, a three-component microsphere catalyst support containing alkyl-functionalized Fe3O4 magnetite core and layered chitosan (CTS) shell has constructed loading gold nanoparticles (Au NPs). Wherein, the is favor recycling formation hexadecyltrimethoxysilance@CTS (C-16@CTS) layer effectively increases its surface area provides more docking sites small Au satellite NPs to construct nanostructure. Through electrostatic interaction coordination, automatically assembled on which served as seeds further bigger stable NPs. The obtained was had enhanced performance fast reduction fading contaminants, including 4-nitrophenol (4-NP), methylene blue (MB), Congo red (CR), rhodamine B (RhB), 6G (R6G), acid orange (AO) methyl (MO). No significant inactivation observed even after eleven cycles or stored than 1 month. addition, used effective pollutant Yellow River water sample, indicated potential practical applications removal environmental remediation. (C) 2014 Elsevier B.V. All rights reserved.