The α Fe 2 O 3 sol was prepared by a sol gel method from FeCl 3 ·6H 2 O. Thin nano particulate films of the α Fe 2 O 3 were deposited on glass substrate by dip coating sol gel technique. The structure and morph...The α Fe 2 O 3 sol was prepared by a sol gel method from FeCl 3 ·6H 2 O. Thin nano particulate films of the α Fe 2 O 3 were deposited on glass substrate by dip coating sol gel technique. The structure and morphology of the thin films were characterized by XRD, UV Vis and AFM analysis methods. The XRD results revealed that the nano crystal with (104) preferential orientation has been formed on glass substrate. The UV Vis spectra showed that the nano particulate films obtained from Fe 2 O 3 aqueous colloidal sols are well transferred to glass substrate at dip coating rate of 80 mm/min. The α Fe 2 O 3 particles are ellipsoidal shaped, with particle size of about 5～7 nm. The multilayer films exhibited high sensitivity to ethanol vapor at room temperature.展开更多
The formation process of pseudo-spherical α-Fe2O3 particles obtained through the hydrolysis of 0.01 mol·L-1 FeCl3 solution was studied by means of TEM and XRD.The results show that the growth of α-Fe2O3 nuclies...The formation process of pseudo-spherical α-Fe2O3 particles obtained through the hydrolysis of 0.01 mol·L-1 FeCl3 solution was studied by means of TEM and XRD.The results show that the growth of α-Fe2O3 nuclies is through the diffusion mechanism.Although the presence of CTAB in the FeCl3 solution has no effect on the growth process of pseudo-spheric α-Fe2O3 particles,more uniform particles are obtained,and the particles are self-assembled to form two-dimensional ordered structure due to the effect of CTAB.The optical character of these α-Fe2O3 particles was investigated,and the band-gap of which is about 2.49 eV.展开更多
文摘The α Fe 2 O 3 sol was prepared by a sol gel method from FeCl 3 ·6H 2 O. Thin nano particulate films of the α Fe 2 O 3 were deposited on glass substrate by dip coating sol gel technique. The structure and morphology of the thin films were characterized by XRD, UV Vis and AFM analysis methods. The XRD results revealed that the nano crystal with (104) preferential orientation has been formed on glass substrate. The UV Vis spectra showed that the nano particulate films obtained from Fe 2 O 3 aqueous colloidal sols are well transferred to glass substrate at dip coating rate of 80 mm/min. The α Fe 2 O 3 particles are ellipsoidal shaped, with particle size of about 5～7 nm. The multilayer films exhibited high sensitivity to ethanol vapor at room temperature.
文摘The formation process of pseudo-spherical α-Fe2O3 particles obtained through the hydrolysis of 0.01 mol·L-1 FeCl3 solution was studied by means of TEM and XRD.The results show that the growth of α-Fe2O3 nuclies is through the diffusion mechanism.Although the presence of CTAB in the FeCl3 solution has no effect on the growth process of pseudo-spheric α-Fe2O3 particles,more uniform particles are obtained,and the particles are self-assembled to form two-dimensional ordered structure due to the effect of CTAB.The optical character of these α-Fe2O3 particles was investigated,and the band-gap of which is about 2.49 eV.
基金Doctorial Start-up Fund of Guizhou University,the International Cooperation Project of Guizhou Province(2012-7002)Outstanding Young Scientists of Guizhou Province(2009-915)+1 种基金Special Funds for Technological Innovation Team Building of Guizhou Province(2010-4005)National Natural Science Foundation of China(11174132)
