摘要：
The charged nano-Al2O3 particles were successfully prepared by sol-gel method, and different approaches including scanning electron microscope, X-ray diffraction and Fourier transforms infrared spectrometry were used to characterize the Al2O3 nanoparticles. Meanwhile, the zeta potentials of Al2O3 nanoparticles were thoroughly investigated in this paper. The analysis results indicated that the prepared Al2O3 nanoparticles were found spherical in shape and demonstrated weak agglomeration. They had a fine crystal phase with a mean size of about 13.2nm. The analysis of Zeta potential demonstrated that the Al2O3 nanoparticles had a positive charge.
摘要：
The PVP/Fe3O4/TBT composite nanofibers have been successfully fabricated via a facile electrospinning assisted sol-gel process, and magnetic TiO2 hollow nanofibers are obtained by the calcination process. The effects of TBT and Fe3O4 dosage on the morphologies and hollow structure of nanofibers are systematically investigated. Scanning electron microscopy (SEM) demonstrated that the magnetic TiO2 nanofibers had a hollow structure with the average diameter of 200 nm. XRD results exhibited that magnetic TiO2 hollow nanofibers with well crystallized anatase phase were obtained. Both the hollow structure and well crystallized anatase phase of TiO2 nanofibers play very important role in photocatalytic activity. Moreover, the magnetic test demonstrated TiO2 hollow nanofibers possessed an excellent magnetic responsiveness, which facilitated the separation of TiO2 hollow nanofibers.
摘要：
A series of hierarchical mesoporous ZSM-5 zeolites with different morphology were successfully synthesized by the CO2-in-water microemulsion method, and mesoporosity was formed without organotemplate. The different synthesis conditions, including silica alumina molar ratio, stirring time and compressed CO2 pressure, were systematically investigated to discuss the influence of these conditions on the morphology of ZSM-5 zeolite. The resulting samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma (ICP) and nitrogen adsorption-desorption measurement. XRD results indicated that compressed CO2 route for the synthesis of MFI zeolites had a fast crystallization rate and good crystallinity. SEM images showed that the ZSM-5 hierarchical mesoporous ZSM-5 zeolite had a uniform chain-like crystal morphology, whereas silicalite-1 displayed a monodisperse crystal morphology. In addition, the nitrogen adsorption-desorption measurement provided sufficient evidence for the presence of hierarchical mesopores in ZSM-5 zeolite.
摘要：
Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.
作者机构：
[Xiang Chen.Tu; Wei Yi.Dan; Kui Le.Jia; Jian Fen.Li] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei, 430023, China
通讯机构：
[Li, J.] S;School of Chemical and Environmental Engineering, Wuhan, Hubei, 430023, China
会议名称：
2012 2nd International Conference on Management, Manufacturing and Materials Engineering, ICMMM 2012
会议时间：
September 21, 2012 - September 23, 2012
会议地点：
Beijing, China
会议主办单位：
(1) School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei, 430023, China
摘要：
NiO nanoparticles were successfully prepared by decomposing the predecessor bis(glycinato)nickel(II)dihydrate in the presence of oleylamine and triphenylphosphine (TPP), and different approaches including Fourier transforms infrared spectrometry(FT-IR), X-ray diffraction(XRD) and transmission electron microscopy (TEM) were used to characterize the NiO nanoparticles. Meanwhile, the effects of TPP concentration and reaction time on the size and yield of NiO nanoparticles derived from precursors were thoroughly investigated in this paper. The analysis results indicated that the prepared NiO nanoparticles were found spherical in shape and demonstrated weak agglomeration. They had generally high purity and a fine crystal phase of cubic syngony. Furthermore, the effects of the TPP concentration and reaction time on the size and yield of NiO nanoparticles are very crucial, higher concentration of TPP would results in reduction of both the mean size and yield of NiO particles. However both yields and particles size of NiO nanoparticles continuously increased as increasing reaction time, after more than 60 minutes, the size and yield of NiO nanoparticles kept hardly change.
摘要：
For the purpose of developing an effective Fe2O3-doped nickel-based catalysts to be used in biomass gasification, Fe2O3 nanoparticles were prepared by homogeneous precipitation method involving an aqueous solution of Fe (NO3)3·9H2O and urea as precipitator. Different approaches, such as XRD and SEM, were used to characterize the products. Meanwhile, the effects of various technical parameters in preparation process on the yield of products were investigated, and optimal conditions for preparing Fe2O3 nanoparticles were found as follows: the molar ratio of urea to Fe (NO3)3·9H2O for 5:1, temperature of precipitation reaction for 125°C, concentration of iron salt for 0.20mol/L. The Fe2O3 nanoparticles prepared under the optimal conditions were spherical in shape and well dispersed; they had high purity and a fine crystal phase of cubic syngony with a mean particle size of about 28nm.
