NDLI: Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO<sub>2</sub> nanospheres for enhancement of Fenton-catalytic efficiency

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Environmental Science: Nano Vol - 3 Issue - 5

Environmental Science: Nano Vol - 3 Issue - 4

Environmental Science: Nano Vol - 3 Issue - 3

Environmental Science: Nano Vol - 3 Issue - 2

Environmental Science: Nano Vol - 3 Issue - 1

Environmental Science: Nano Vol -2

Environmental Science: Nano Vol -1

Galvanic-like cells produced by negative charge nonuniformity of lattice oxygen on d-TiCuAl–SiO₂ nanospheres for enhancement of Fenton-catalytic efficiency

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Lili Lyu, Lai Hu, Chun
Copyright Year	2016
Abstract	An efficient Fenton-type nano-catalyst consisting of Cu, Ti and Al lattice-doped dandelion-like silica nanospheres (d-TiCuAl–SiO2 Ns) was successfully prepared via a hydrothermal process for the first time. The lattice substitution of Cu, Ti and Al for Si initiated a higher and a lower electron density of the lattice O2− around the lattice Cu and near the lattice Ti & Al, respectively, through the higher electronegativity of Cu on the basis of extended X-ray absorption fine structure, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, cyclic voltammetry and electron paramagnetic resonance measurement. Thus, countless surface galvanic-like cells formed between the electron-rich Cu center (cathode) and the electron-deficient Ti and Al region (anode) on the nanospheres, enhancing the selective adsorption of H2O2 on d-TiCuAl–SiO2 Ns. This kind of surface structure facilitated the reduction of H2O2 to ˙OH at the cathode and induced the oxidation of organic radical intermediates (˙R) on the anode through the delivery of the electron of ˙R to the cathode during the Fenton reaction, which resulted in almost all of the energy of H2O2 being applied to the degradation of pollutants. Therefore, d-TiCuAl–SiO2 Ns were highly effective and stable for persistent contaminant degradation at neutral pH values, which was ∼10 times higher than that of the conventional Fenton catalysts. Moreover, the utilization efficiency of H2O2 has been maintained at a very high level throughout the Fenton reaction. Our findings indicated that the special surface design of nanoparticles could be applied toward the improvement of Fenton reaction efficiency and utilization of H2O2.
Starting Page	1483
Ending Page	1492
Page Count	10
File Format	HTM / HTML PDF
ISSN	20518153
Volume Number	3
Issue Number	6
Journal	Environmental Science: Nano
DOI	10.1039/c6en00290k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu Ti Al Fenton Silicon dioxide Hydrothermal circulation Crystal structure Oxygen Electronegativity Extended X-ray absorption fine structure X-ray photoelectron spectroscopy Photoemission spectroscopy Fourier-transform infrared spectroscopy Cyclic voltammetry Electron paramagnetic resonance Cathode Anode Selective adsorption Hydrogen peroxide PH
Content Type	Text
Resource Type	Article
Subject	Environmental Science Materials Science

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