The samples of nano-size ZnO were pre pared by precipitation,hydrolysis,sol-gel method and characterized b y X-ray diffraction,Uv-Vis diffuse r eflection spectrum,and time resolv ed luminescent spectrum.The results sh...The samples of nano-size ZnO were pre pared by precipitation,hydrolysis,sol-gel method and characterized b y X-ray diffraction,Uv-Vis diffuse r eflection spectrum,and time resolv ed luminescent spectrum.The results showed that the crystallite dimensions of a ll ZnO samples were coarsening with i ncreasing annealing temperature an d the grain sizes prepared by sol-gel meth od were obviously smaller than the others prepared by precipitation and h y-drolysis method.Under excitation o f monochromatic light of wavelength300nm,a strong and broad photolumin es-cence(PL)emissions were observed in the wavelength range of 420～780nm.As the grain size decreased,the PL peak positions moved to shorter wavelengths.And as the annealing temperature increased,the peak intensity de-creased.The photoluminescence dec ay profile of ZnO was well described b y three decay components of 46ns,330ns and 1630ns.展开更多
Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, inte...Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, interaction between nano ZnO particles and surfactants, UV-absorption behaviors were characterized by TEM, IR and UV.展开更多
One-dimensional （1D） ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their diverse current and futur...One-dimensional （1D） ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their diverse current and future technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and the corresponding growth mechanisms, various nanostructures grown, their doping and alloying, and position-controlled growth on substrates. Finally, we will review their functional properties in catalysis, hydrophobic surface modification, sensing, and electronic, optical, optoelectronic, and energy harvesting devices.展开更多
文摘The samples of nano-size ZnO were pre pared by precipitation,hydrolysis,sol-gel method and characterized b y X-ray diffraction,Uv-Vis diffuse r eflection spectrum,and time resolv ed luminescent spectrum.The results showed that the crystallite dimensions of a ll ZnO samples were coarsening with i ncreasing annealing temperature an d the grain sizes prepared by sol-gel meth od were obviously smaller than the others prepared by precipitation and h y-drolysis method.Under excitation o f monochromatic light of wavelength300nm,a strong and broad photolumin es-cence(PL)emissions were observed in the wavelength range of 420～780nm.As the grain size decreased,the PL peak positions moved to shorter wavelengths.And as the annealing temperature increased,the peak intensity de-creased.The photoluminescence dec ay profile of ZnO was well described b y three decay components of 46ns,330ns and 1630ns.
文摘Surface modified nanostructured ZnO was prepared by means of ultrasonic induced reaction within microemulsion croemulsion system consisting of surfactants such as PEG, Span 80 and cyclohaxane/H2O. The morphology, interaction between nano ZnO particles and surfactants, UV-absorption behaviors were characterized by TEM, IR and UV.
文摘One-dimensional （1D） ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their diverse current and future technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and the corresponding growth mechanisms, various nanostructures grown, their doping and alloying, and position-controlled growth on substrates. Finally, we will review their functional properties in catalysis, hydrophobic surface modification, sensing, and electronic, optical, optoelectronic, and energy harvesting devices.
