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Citation: LI Qiang, WANG Lin-Sheng, WANG Hai-Xia, LU Rong-Li, LIU Tian. Preparation of Nanosized Magnesium Oxide and Its UV-shielding Capacity[J]. Chinese Journal of Applied Chemistry, ;2006, 23(10): 1145-1149. shu

Preparation of Nanosized Magnesium Oxide and Its UV-shielding Capacity

1.
Department of Chemistry, East China Normal University, Shanghai 200062

Corresponding author: WANG Lin-Sheng,
Received Date: 24 November 2005
Available Online: 5 March 2006
Fund Project: 上海市科委纳米专项基金(No.0452nm026) (No.0452nm026)

The magnesium oxide nanocrystallites were prepared by means of a sol-gel method with malic acid and magnesium nitrate as raw materials.Under different preparing conditions,the particle size can vary from 7 nm to 20 nm.The intermediate gel and final product were characterized by FI-IR,TG-DTA,XRD and TEM.The effects of the ratio of the raw materials,calcined temperature and time,the initial pH value and the amount of ethanol on the particle size and morphology of the sample were analyzed.The results show that the conditions of the molar ratio of Mg²⁺ to malic acid being 1:1.5,calcined temperature 500~700℃,calcined time 3 h,the initial pH value 3~7 and the volume ratio 1:4 are favorable for the formation of nanosized magnesium oxide.The UV-Vis Spectra show that the UV-shielding capacity of the nanosized magnesium oxide is better than that of normal magnesium oxide.
- malic acid,
- nanosized magnesium oxide,
- UV-shielding,
- sol-gel method
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