1-Methyl-3-carboxymethyl imidazolium chlorine（\C2OOHmim\Cl） ionic liquid surface-capped TiO 2 nanoparticles were prepared by using tetra-n-butyl titanate ethanol solution as a precursor. The structure of nanoparticl...1-Methyl-3-carboxymethyl imidazolium chlorine（\C2OOHmim\Cl） ionic liquid surface-capped TiO 2 nanoparticles were prepared by using tetra-n-butyl titanate ethanol solution as a precursor. The structure of nanoparticles was characterized by FTIR, TEM, XRD and XPS. The results confirmed that \KG-1/5C2OOHmim\·Cl ionic liquid combined with TiO 2 nanoparticles by chelation, the average diameter of TiO 2 nanoparticles was about 8 nm and anatase state was obtained. And only anatase existed even after calcinated at 750 ℃. As to the formation mechanism, we think that the inorganic-organic copolymerized surface-capped layer and repulsive force of positive charge played an important role in the formation and stabilization of TiO 2 nanoparticles.展开更多
ZnO nanorods were successfully synthesized by thermal decomposition of Zn（OH）2 in the ionic （liquid） 1-butyl-3-ethylimidazolium tetrafluoroborate, and the growth mechanism of ZnO micro-crystallites was presumed. T...ZnO nanorods were successfully synthesized by thermal decomposition of Zn（OH）2 in the ionic （liquid） 1-butyl-3-ethylimidazolium tetrafluoroborate, and the growth mechanism of ZnO micro-crystallites was presumed. Their structure and morphology were characterized by means of transmission electron microscopy（TEM）, infrared spectroscopy（IR）, and X-ray powder diffraction（XRD）. The TEM results （indicate） that the diameters and lengths of the ZnO nanorods were ca. 25 nm and ca. 150 nm, respectively. The IR spectra show that the ZnO nanorods were modified by 1-butyl-3-ethylimidazolium tetrafluoroborate. The XRD pattern reveals that the prepared ZnO nanorods belong to the hexagonal crystal system. The above-mentioned results indicate that ionic liquid can not only act as a reaction medium but also modify ZnO nanorods in the reaction.展开更多
Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten t...Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotube arrays were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD). The results show that the diameter of the tungsten trioxide nanotube arrays is about 165 nm and just equals to the diameter of pores of AAO template, which reveals that the diameter of the tungsten trioxide nanotube arrays is dependable on the size of the pores in the AAO template. The tungsten trioxide nanotubes are composed by tungsten trioxide nanoparticles formed by reaction (NH 4) 2WO 4550 ℃2NH 3↑+WO 3+H 2O↑ in the heating process.展开更多
The nano TiO 2/Poly(butyl acrylate) composite film was prepared by in situ polymerization initiated by UV illustration and characterized by FTIR, XPS and HRTEM. The friction behavior of the composite film in sliding a...The nano TiO 2/Poly(butyl acrylate) composite film was prepared by in situ polymerization initiated by UV illustration and characterized by FTIR, XPS and HRTEM. The friction behavior of the composite film in sliding against AISI 52100 steel was examined on a DF PM friction coefficient measurement apparatus. The results indicated that the TiO 2 nanolines were dispersed in the poly(butyl acrylate) network. The film exhibites a good antiwear property.展开更多
The TiO2 based dye-sensitized solar cells doped with different sizes of ZnO nanorods were fabricated and studied by photoelectrochemical measurements. The results show that the energy conversion efficiency of the dye-...The TiO2 based dye-sensitized solar cells doped with different sizes of ZnO nanorods were fabricated and studied by photoelectrochemical measurements. The results show that the energy conversion efficiency of the dye-sensitized solar cells after the addition of ZnO nanorods(1%, mass fraction) was increased by 6%—20% in comparison with that without ZnO nanorods. The effect of different sizes of ZnO nanorods on the electronic transportation properties was studied in the composite semiconductor film by means of transient photovoltage technology(TPV). The result indicates that the electron diffusing velocity in N3-sensitized TiO2/ZnO film electrode was about 1—3 order of magnitude faster than that in TiO2 electrode. The experimental results indicate that the TiO2/ZnO electrode can improve the electron transport, decrease the recombination, enhance Voc, and increase efficiency of energy conversion.展开更多
The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorptio...The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorption spectrum. The results of UV-Vis absorption spectrum indicate that the diameter of the TiO 2 nanoparticles is 2 nm. The results of X-ray diffraction indicate that the thin film is composed of organic and inorganic layers in alternately orderly arrangement. The distance between the organic layer and inorganic layer is 4.61 nm. The thicknesses of organic layer and inorganic layer are 2.58 and 2 nm, respectively.展开更多
文摘1-Methyl-3-carboxymethyl imidazolium chlorine（\C2OOHmim\Cl） ionic liquid surface-capped TiO 2 nanoparticles were prepared by using tetra-n-butyl titanate ethanol solution as a precursor. The structure of nanoparticles was characterized by FTIR, TEM, XRD and XPS. The results confirmed that \KG-1/5C2OOHmim\·Cl ionic liquid combined with TiO 2 nanoparticles by chelation, the average diameter of TiO 2 nanoparticles was about 8 nm and anatase state was obtained. And only anatase existed even after calcinated at 750 ℃. As to the formation mechanism, we think that the inorganic-organic copolymerized surface-capped layer and repulsive force of positive charge played an important role in the formation and stabilization of TiO 2 nanoparticles.
文摘ZnO nanorods were successfully synthesized by thermal decomposition of Zn（OH）2 in the ionic （liquid） 1-butyl-3-ethylimidazolium tetrafluoroborate, and the growth mechanism of ZnO micro-crystallites was presumed. Their structure and morphology were characterized by means of transmission electron microscopy（TEM）, infrared spectroscopy（IR）, and X-ray powder diffraction（XRD）. The TEM results （indicate） that the diameters and lengths of the ZnO nanorods were ca. 25 nm and ca. 150 nm, respectively. The IR spectra show that the ZnO nanorods were modified by 1-butyl-3-ethylimidazolium tetrafluoroborate. The XRD pattern reveals that the prepared ZnO nanorods belong to the hexagonal crystal system. The above-mentioned results indicate that ionic liquid can not only act as a reaction medium but also modify ZnO nanorods in the reaction.
文摘Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotube arrays were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD). The results show that the diameter of the tungsten trioxide nanotube arrays is about 165 nm and just equals to the diameter of pores of AAO template, which reveals that the diameter of the tungsten trioxide nanotube arrays is dependable on the size of the pores in the AAO template. The tungsten trioxide nanotubes are composed by tungsten trioxide nanoparticles formed by reaction (NH 4) 2WO 4550 ℃2NH 3↑+WO 3+H 2O↑ in the heating process.
文摘The nano TiO 2/Poly(butyl acrylate) composite film was prepared by in situ polymerization initiated by UV illustration and characterized by FTIR, XPS and HRTEM. The friction behavior of the composite film in sliding against AISI 52100 steel was examined on a DF PM friction coefficient measurement apparatus. The results indicated that the TiO 2 nanolines were dispersed in the poly(butyl acrylate) network. The film exhibites a good antiwear property.
文摘The TiO2 based dye-sensitized solar cells doped with different sizes of ZnO nanorods were fabricated and studied by photoelectrochemical measurements. The results show that the energy conversion efficiency of the dye-sensitized solar cells after the addition of ZnO nanorods(1%, mass fraction) was increased by 6%—20% in comparison with that without ZnO nanorods. The effect of different sizes of ZnO nanorods on the electronic transportation properties was studied in the composite semiconductor film by means of transient photovoltage technology(TPV). The result indicates that the electron diffusing velocity in N3-sensitized TiO2/ZnO film electrode was about 1—3 order of magnitude faster than that in TiO2 electrode. The experimental results indicate that the TiO2/ZnO electrode can improve the electron transport, decrease the recombination, enhance Voc, and increase efficiency of energy conversion.
文摘The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorption spectrum. The results of UV-Vis absorption spectrum indicate that the diameter of the TiO 2 nanoparticles is 2 nm. The results of X-ray diffraction indicate that the thin film is composed of organic and inorganic layers in alternately orderly arrangement. The distance between the organic layer and inorganic layer is 4.61 nm. The thicknesses of organic layer and inorganic layer are 2.58 and 2 nm, respectively.
