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Synthesis of N-doped ZnO Nanorods by Sol-gel and the Study of Its Capability

Author: WangQin
Tutor: ZhengMin
School: Suzhou University
Course: Textile Chemistry and Dyeing and Finishing Engineering
Keywords: sol-gel nanorods N-doped ZnO photolytic antimicrobial
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 87
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Abstract


In recent years, the growing maturity and development of nano-technology ZnO is not only greatly improved application performance in the field of optoelectronic And give it a strong catalytic activity and strong ultraviolet light absorption and scattering ability In the photocatalystic degradation, the field of sterilization and elimination of environmental contaminants attracted widespread attention.In the paper, N-doped ZnO nanorods were synthesized by sol-gel method. XRD, SEM, TEM and TG were used to characterize the properties of the as-synthesized samples. Its photocatalystic and ultraviolet prevention were studied and evaluated.The main reseach work and results are as follow:(1) N-doped ZnO nanorods were synthesized by sol-gel method using zinc nitrate , urea , ammonia as material.(2) The experimental results show that the nanorods and the perfect pink powders with standard cubic ZnO crystal phase are obtained under 550℃when the amount of ammonia is 50mL and the concentration of surfactant PVP is 10g / L. The average primary granularity of the as-synthsized sample is about 26nm estimated according to Scherrer Equation. The analysises of XPS indicates that the concentration of N-doped in the sample is 1.25%.(3) Through the doping ratio of N, the concentration and N-doped ZnO, initial solution pH, initial concentration of methylene blue, light source et al influencing factors researching ,the result show the optimum technology is: the doping ratio of N:1.5 %, the concentration of N-doped ZnO:0.15g/L, solution pH=9, the initial concentration of methylene blue :10mg/L, light source :300W and in the 30min the catalytic degradation rate can reach the best.(4) Vacancies and electrons played an important role in the process of photocatalystic.(5) The cotton textile treated by N-doped ZnO nanorods slurry shows substantial anti-UV properties when the concentration of N-doped ZnO nanorods is 4g/L. The UPF value of cotton textile is 38.66 and strong washing fastness is also obtained.In this paper, the N-doped ZnO nanorods were synthesized by sol-gel method for the first time. The sol-gel not only achieved doping, but also controlled the morphology of crystal. The N-doped ZnO nanorods can greatly improved the performance of photocatalystic and ultraviolet prevention.

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