以微波法製備氧化鎳中空微球之研究

李承澔

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以微波法製備氧化鎳中空微球之研究

A Study on the Preparation of Hollow Microspheres of Nickel Oxide by Microwave Method

李承澔 , Masters　　Advisor：蔡德華　　

繁體中文

微波法；氧化鎳；微球；模板法； Microwave ； NiO ； Microspheres ； Templating method

Abstract │ Reference (111) │ Altmetrics

Abstract 〈TOP〉

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In this study, the carbon spheres as templates, is used prepare the NiO hollow spheres. Metal oxide hollow sphere have been synthesized successfully by various methods, such as templating method, sol-gel method, hydrothermal method, spray pyrolysis method and so on. The most-applied method for the synthesis of metal oxide hollow spheres is by far the templating of carbon spheres prepared by dehydrating glucose or sucrose under hydrothermal conditions, the surface of the carbon sphere have a well distribution of ─OH groups and ─C=O groups.
This study will improve the disadvantage of hydrothermal method. We use microwave to prepare because it has several characteristics: (1) faster reaction rate, (2) milder reaction conditions, (3) higher chemical yield, (4) lower energy consumption.
The experiment was divided into two parts, the preparation of carbon sphere templates and the synthesis of NiO hollow microspheres. Carbon sphere templates : carbon spheres prepared by dehydrating glucose under microwave conditions. NiO hollow microspheres: nickel sulfate and urea as raw materials, carbon spheres as templates, water as a reaction solvent, synthesis reaction at 60 ℃. Study the relationship between microwave power, time and carbon spheres templates of surface shape, and effect between reaction time, raw materials and yield. We explore morphology, the crystalline phases by SEM, XRD and SEM/EDX.
According to the experiments, we found that better template in the microwave conditions for the 350W, and the microwave time was 3 hr, the NiO hollow microspheres of yield increasing as the reaction time increases; NiO of particle size increasing as the carbon sphere diameter increases, the shell thickness thinning as the carbon sphere increases.

Reference ( 111 ) 〈TOP〉

[1] Z. P. Xu , H. C. Zeng“Synthesis of Co3O4 spinel at ambientconditions”Chem. Mater., 12,3459, 2000.
連結：
[2] S. Tanaka, M. Fujii, S. Kohiki, et al. “Intraparticle Magnetic Properties of Co3O4 Nanocrystals”Nano Letter, 1: 379, 2001.
連結：
[4] R. Xu, H. C. Zeng,“Mechanistic investigation on salt-mediated formation of free-standing Co3O4 nanocubes at 95℃”J. Phys. Chem. B, 107: 926-930, 2003.
連結：
[5] 張俊偉，“以微波法製備鎳氧化物之研究”，碩士論文，國立台北科技大學化學工程所，台北，2010。
連結：
[9] M.L. Schmitt, J.E. Shelby, M.M. Hall, “Preparation of hollow glass microspHeres from sol–gel derived glass for application in hydrogen gas storage”, Journal of Non-Crystalline Solids , 352,626–631,2006.
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