Enhanced Catalytic Reduction of 4-Nitrophenol Driven by Fe?O?-Au Magnetic Nanocomposite Interface Engineering: From Facile Preparation to Recyclable Application.

ABSTRACT: In this work, we report the enhanced catalytic reduction of 4-nitrophenol driven by Fe?O?-Au magnetic nanocomposite interface engineering. A facile solvothermal method is employed for Fe?O? hollow microspheres and Fe?O?-Au magnetic nanocomposite synthesis via a seed deposition process. Complementary structural, chemical composition and valence state studies validate that the as-obtained samples are formed in a pure magnetite phase. A series of characterizations including conventional scanning/transmission electron microscopy (SEM/TEM), Mössbauer spectroscopy, magnetic testing and elemental mapping is conducted to unveil the structural and physical characteristics of the developed Fe?O?-Au magnetic nanocomposites. By adjusting the quantity of Au seeds coating on the polyethyleneimine-dithiocarbamates (PEI-DTC)-modified surfaces of Fe?O? hollow microspheres, the correlation between the amount of Au seeds and the catalytic ability of Fe?O?-Au magnetic nanocomposites for 4-nitrophenol (4-NP) is investigated systematically. Importantly, bearing remarkable recyclable features, our developed Fe?O?-Au magnetic nanocomposites can be readily separated with a magnet. Such Fe?O?-Au magnetic nanocomposites shine the light on highly efficient catalysts for 4-NP reduction at the mass production level.

SUBMITTER: Chen Y 

PROVIDER: S-EPMC5977367 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature