Ce-doped Zn-Al layered double hydroxide（LDH） nanocontainer was synthesized by a co-precipitation method. X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM...Ce-doped Zn-Al layered double hydroxide（LDH） nanocontainer was synthesized by a co-precipitation method. X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM） methods were used for the characterization of the LDH nanocontainer. The anticorrosion activity of the LDH powders embedded in a hybrid sol-gel coating on aluminum alloy 2024 was investigated by electrochemical impendence spectroscopy（EIS）. The results showed that Ce（III） ions were successfully incorporated into LDHs layers. The sol-gel coating modified with Ce-doped Zn-Al LDHs exhibited higher anticorrosion behavior compared with both unmodified and Ce-undoped LDHs containing coatings, which proved the applicability of Ce-doped LDHs in delaying coating degradation and their potential application as nanocontainers of corrosion inhibitors in self-healing coatings.展开更多
Hexagonal single-crystalline cerium carbonate hydroxide （CeCO3OH） precursors with dendrite morphologies have been synthesized by a facile hydrothermal method at 180 C using CeCl3-7H2O as the cerium source, triethyle...Hexagonal single-crystalline cerium carbonate hydroxide （CeCO3OH） precursors with dendrite morphologies have been synthesized by a facile hydrothermal method at 180 C using CeCl3-7H2O as the cerium source, triethylenetetramine as both an alkaline and carbon source, with triethylenete- tramine also playing an important role in the formation of the dendrite structure. Polycrystalline ceria （CeO2） have been obtained by calcining the precursor at 500 C for 4 h. Tile morphology of the precursor was partly maintained during the heating process. The optical absorption spectra indicate the CeO2 nano/microstructures have a direct band gap of 2.92 eV, which is lower than values of the bulk powder due to the quantum size effect. The high absorption in the UV region for CeO2 nano/microstructure indicated that this material was expected to be used as UV-blocking materials.展开更多
基金Funded by the National Natural Science Foundation of China(No.51271012)
文摘Ce-doped Zn-Al layered double hydroxide（LDH） nanocontainer was synthesized by a co-precipitation method. X-ray diffraction（XRD）, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM） methods were used for the characterization of the LDH nanocontainer. The anticorrosion activity of the LDH powders embedded in a hybrid sol-gel coating on aluminum alloy 2024 was investigated by electrochemical impendence spectroscopy（EIS）. The results showed that Ce（III） ions were successfully incorporated into LDHs layers. The sol-gel coating modified with Ce-doped Zn-Al LDHs exhibited higher anticorrosion behavior compared with both unmodified and Ce-undoped LDHs containing coatings, which proved the applicability of Ce-doped LDHs in delaying coating degradation and their potential application as nanocontainers of corrosion inhibitors in self-healing coatings.
基金supported financially by the Program for Innovative Research Team in Jiangsu Province(No.SZK[2011]87)Creative and Innovative Talents Introduction Plan(No.SZT[2011]43)Special Research Foundation of Young teachers of Nanjing University of Technology(No.39701007)
文摘Hexagonal single-crystalline cerium carbonate hydroxide （CeCO3OH） precursors with dendrite morphologies have been synthesized by a facile hydrothermal method at 180 C using CeCl3-7H2O as the cerium source, triethylenetetramine as both an alkaline and carbon source, with triethylenete- tramine also playing an important role in the formation of the dendrite structure. Polycrystalline ceria （CeO2） have been obtained by calcining the precursor at 500 C for 4 h. Tile morphology of the precursor was partly maintained during the heating process. The optical absorption spectra indicate the CeO2 nano/microstructures have a direct band gap of 2.92 eV, which is lower than values of the bulk powder due to the quantum size effect. The high absorption in the UV region for CeO2 nano/microstructure indicated that this material was expected to be used as UV-blocking materials.
