am501014s_si_001.pdf (775.15 kB)
Synthesis of an Fe Rich Amorphous Structure with a Catalytic Effect To Rapidly Decolorize Azo Dye at Room Temperature
journal contribution
posted on 2014-04-23, 00:00 authored by Peng Liu, Ji Liang Zhang, Mei Qin Zha, Chan Hung ShekIn this article,
an amorphous Fe rich amorphous structure designed
based on a competitive atomic cluster model was synthesized and characterized
successfully. The constituent zero-valent iron (ZVI) has excellent
activity and efficiency for decolorization of Orange G (OG) solution
at room temperature. The decolorization is characterized by UV-vis
spectrum and pseudo-first-order kinetics. The X-ray Micro fluorescence
spectrometer, Inductively Coupled Plasma Optical Emission Spectrometry,
and Scanning Electron Microscope were employed to trace the ZVI. The
consumption of ZVI destabilizes the local atomic arrangement and yields
the phase separation of Fe at the surface and responds to the high
activity and the catalysis for decolorization. This observation is
in accordance with the change of k1 0.011
min–1 to k2 0.047 min–1, which is supported by the cyclic decolorization
test. This work provides a new strategy to design multifunctional
metal materials and indicates their brilliant future in practical
applications.