摘要
以不锈钢和玻璃作为基底，氟铁酸铵和硼酸为前驱体，用液相沉积法得到水合氧化铁薄膜，然后在0．2mol／L的Zn^2＋溶液中进行水热转化，最终形成铁酸锌薄膜。通过XRD、SEM和TEM对薄膜的物相和表面形貌进行表征，用XPS对薄膜表面元素价态进行确定，结果表明：在水热温度为175～250℃、pH=5～11、水热时间12h可以成功合成铁酸锌薄膜，铁酸锌粒径约20nm。紫外-可见光吸收谱（UV-Vis）表明其光响应范围为λ〈473nm，电化学测试表明其光生电位低于不锈钢的自腐蚀电位。
ZnFe2O4 thin films have been successfully formed on glass and stainless steel substrates from aqueous solution through equilibrium reaction between iron （Ⅲ）-fluoric and boric acid, followed by in-situ hydrothermal conversion and crystallization in the Zn^2＋ -contained environment. XRD, SEM and TEM were used to study the crystal phases, the average sizes and shapes of layers. And X-ray photoelectron spectroscopy （XPS） was used to test elements of the film＇s surface. The results show that the thin film could be prepared under the following condition： 175-250℃, pH = 5-11, 12h and the average grain size was about 20 nm. UV-Visible spectrophotometry （UV-Vis） indicated the aborting edge is 473 nm. The polarization curve showed the photovoltaic of ZnFe2O4 is more negative than the corrosion potential of bare stainless steel.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2007年第1期23-26,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金(50371044)
河北省教育厅资助项目(2004318)
关键词
液相沉积
水热法
铁酸锌
薄膜
Liquid phase deposition
Hydrothermal synthesis
Zinc ferrite
Thin film
