PDF全文下载：2011010025
张晓， 胡孔诚*
(青岛科技大学 化学与分子工程学院，山东 青岛 266042)
摘要: 利用乙二醇为表面活性剂，通过超声合成方法成功制备了粒径均匀、分散性良好的微米级FeWO4。利用粉末XRD、SEM及FT-IR等手段对所制备的FeWO4进行了表征。制得的FeWO4 被固定在玻碳电极表面制成FeWO4/CHIT/GCE复合电极，电化学测试发现该电极能够加速Fe(Ⅲ) 和 Fe(Ⅱ) 氧化还原对间的电子转移。进一步在该电极表面固定牛血红蛋白(Hb)后，即得到一种新型的可用于测定溶液中H2O2浓度的传感器。该传感器线性范围为5.0至 460 μmol·L-1，检测限为1.0 μmol·L-1 (3σ)。
关键词: 钨酸铁； 超声合成； H2O2; 生物传感器
中图分类号: Ｏ 614.43+3 文献标志码： A
Sonochemical Synthesis and Characterization of FeWO4 Crystals
ZHANG Xiao, HU Kong-cheng
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract:Narrow-size range and highly dispersed FeWO4 particles have been successfully synthesized by an ethylene glycol (EG)-assisted ultrasonic technique. The products were characterized by X-ray diffraction (XRD), field emission scanning electronic microscope (FESEM), and FT-IR spectra analysis. The obtained FeWO4 were immobilized on glass carbon electrode (GCE) to fabricate FeWO4/CHIT/GCE electrode. The electrochemical test results proved that it could enhance electron transfer for the heme Fe(Ⅲ) to Fe(Ⅱ) redox couple. The FeWO4/CHIT/GCE electrode was further immobilized with hemoglobin to fabricate a novel H2O2 sensor. The sensor showed an excellent bioelectrocatalytic activity towards H2O2 with a linear range from 5.0 to 460 μmol·L-1, and the detection limit was 1.0 μmol·L-1 at 3σ.
Key words: FeWO4; sonochemical synthesis; H2O2; sensor
收稿日期: 2010-04-09
基金项目: 青岛科技大学博士启动基金项目（2007）.
作者简介: 张晓（1979—）,女，博士. *通信联系人.
