Ag nanoparticles were prepared using hydroxyl-functionalized ionic liquids as reductant and reaction medium. Nanoparticles with different particle sizes were obtained by using ionic liquids with different structures, ...Ag nanoparticles were prepared using hydroxyl-functionalized ionic liquids as reductant and reaction medium. Nanoparticles with different particle sizes were obtained by using ionic liquids with different structures, while nanorods were harvested when the reaction temperature was increased. The materials obtained were investigated by XRD and TEM. The results indicate that the crystal is in face-centred cubic structure for both of Ag nanoparticles and nanorods, and the diameter of Ag nanoparticles prepared in 1-ethoxyl-3-methyl imidazolium tetrafluoroborate ([C2OHmim]BF4), 1-(4′-hydroxyl)butyl-3-methyl imidazolium tetrafluoroborate ([C4OHmim]BF4) and 1-(6′-hydroxyl)hexyl-3-methyl imidazolium tetrafluoroborate ([C6OHmim]BF4) ionic liquid is about 25, 15 and 10 nm, respectively. And the diameter of Ag nanorods is about 200 nm and 2 μm in length. Finally, the formation mechanism of Ag nanoparticles and nanorods is proposed.展开更多
近年来,室温离子液体（Room Temperature Ionic Liquids）作为一种新颖的催化剂和绿色溶剂正在被越来越多的人们所认识和接受,在有机合成、催化和萃取分离等领域得到了广泛的应用。而功能化离子液体研究的深入开展不仅大大地丰富了离子...近年来,室温离子液体（Room Temperature Ionic Liquids）作为一种新颖的催化剂和绿色溶剂正在被越来越多的人们所认识和接受,在有机合成、催化和萃取分离等领域得到了广泛的应用。而功能化离子液体研究的深入开展不仅大大地丰富了离子液体家族的多样性，而且赋予了离子液体特殊的物理、化学性能，也极大地拓展了离子液体的应用领域，关于功能化离子液体的研究．将是未来离子液体研究领域的一个主要方向。展开更多
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
In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical...In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotubes 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 wall thickness of the tungsten trioxide nanotubes arrays can be controlled by the immersion time. The growth mechanism of naotubes arrays is also discussed.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
Sb 2 O 3 nanoparticles were prepared via hydrolyze reaction of SbCl 3 in water - ethanol solution,and were char - acterized by XRD and TEM.In addition,the effect of reactive condition on particle size was also investi...Sb 2 O 3 nanoparticles were prepared via hydrolyze reaction of SbCl 3 in water - ethanol solution,and were char - acterized by XRD and TEM.In addition,the effect of reactive condition on particle size was also investigated systematically.When the sample modified by coupling agent was applied in formulation of plastic,the mechanical property and flame retardancy was better than micron sample.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
DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles w...DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles was characterized by selected area electron diffraction (SAED) and X-ray diffraction (XRD). In addition, the powder was found to have an excellent antiwear property by tribological test.展开更多
文摘Ag nanoparticles were prepared using hydroxyl-functionalized ionic liquids as reductant and reaction medium. Nanoparticles with different particle sizes were obtained by using ionic liquids with different structures, while nanorods were harvested when the reaction temperature was increased. The materials obtained were investigated by XRD and TEM. The results indicate that the crystal is in face-centred cubic structure for both of Ag nanoparticles and nanorods, and the diameter of Ag nanoparticles prepared in 1-ethoxyl-3-methyl imidazolium tetrafluoroborate ([C2OHmim]BF4), 1-(4′-hydroxyl)butyl-3-methyl imidazolium tetrafluoroborate ([C4OHmim]BF4) and 1-(6′-hydroxyl)hexyl-3-methyl imidazolium tetrafluoroborate ([C6OHmim]BF4) ionic liquid is about 25, 15 and 10 nm, respectively. And the diameter of Ag nanorods is about 200 nm and 2 μm in length. Finally, the formation mechanism of Ag nanoparticles and nanorods is proposed.
文摘近年来,室温离子液体（Room Temperature Ionic Liquids）作为一种新颖的催化剂和绿色溶剂正在被越来越多的人们所认识和接受,在有机合成、催化和萃取分离等领域得到了广泛的应用。而功能化离子液体研究的深入开展不仅大大地丰富了离子液体家族的多样性，而且赋予了离子液体特殊的物理、化学性能，也极大地拓展了离子液体的应用领域，关于功能化离子液体的研究．将是未来离子液体研究领域的一个主要方向。
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In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotubes 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 wall thickness of the tungsten trioxide nanotubes arrays can be controlled by the immersion time. The growth mechanism of naotubes arrays is also discussed.
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Sb 2 O 3 nanoparticles were prepared via hydrolyze reaction of SbCl 3 in water - ethanol solution,and were char - acterized by XRD and TEM.In addition,the effect of reactive condition on particle size was also investigated systematically.When the sample modified by coupling agent was applied in formulation of plastic,the mechanical property and flame retardancy was better than micron sample.
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DDP-coated Sn nanoparticles were prepared by ultrasonic irradiation method. The nanoparticles were found to be well dispersed and coated with the surfactant DDP. The tetragonal phase of the as-prepared nanoparticles was characterized by selected area electron diffraction (SAED) and X-ray diffraction (XRD). In addition, the powder was found to have an excellent antiwear property by tribological test.
