Electrochemical preparation and characterization of brain-like nanostructures of Y_2O_3

作     者：Mustafa Aghazadeh Mojtaba Hosseinifard Mohammad Hassan Peyrovi Behrouz Sabour 

作者机构：Department of ChemistryIslamic Azad UniversityShar-e-Ray BranchTehranIran Department of ChemistryFaculty of ScienceShahid Beheshti UniversityG.C.P.O.Box 19396-4716TehranIran 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2013年第31卷第3期

页      面：281-288页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：cathodic electrodeposition heat-treatment electrochemical growth yttrium oxide brain-like nanostructure rare earths 

摘      要：Nanostructured Y203 was successfully prepared via a two-step and template-free method. Firstly, yttrium hydroxide precursor was galvanostatically grown on the steel substrate from chloride bath by direct and pulse current deposition modes. Direct cunent deposition was carried out at the constant current density of 0.1 A/dm2 for 600 s. The pulse current was also performed at a typical on-time and off-time （ton=l S and Germ s） with an average current density of 0.05 A/dm2 （la=0.05 A/din2） for 600 s. The obtained hydroxide films were then scraped from the substrates and thermally converted into final oxide product via heat-treatment. Thermal behaviors and phase transformations during the heat treatment of the hydroxide powder samples were investigated by differential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）. The final oxide products were characterized by means of X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR） and scanning electron microscopy （SEM）. The results showed that the well-crystallized Y203 with brainand sphere-like morphology were achievable via pulse and direct deposition modes, respectively. It was concluded that pulse current cathodic electrodeposition offered a facile route for preparation ofnanostructured Y203.