纳米钨酸锰的超声合成及其性质研究  

Sonochemical Synthesis and Characterization of MnWO_4 Nanocrystals

作　　者：郭金学[1] 陈菲[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2010年第4期361-366,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：青岛科技大学博士启动基金项目(22254)

摘　　要：以乙二醇为表面活性剂,通过超声合成方法成功制备了具有颗粒状、大块花状及膜状等不同结构的纳米MnWO4。实验发现,乙二醇浓度和超声波是影响纳米MnWO4最终形貌的2个关键因素。利用纳米MnWO4作为光催化剂完成了对有机染料罗丹明B的光降解实验,结果表明超声法制备的纳米MnWO4具有良好的光催化性能。MnWO4还被固定在玻碳电极表面制成MnWO4/CHIT/GCE复合电极,该电极能够增强Fe(Ⅲ)和Fe(Ⅱ)氧化还原对间的电子转移。因此,MnWO4/CHIT/GCE复合电极能够作为一个很好的平台用于固定牛血红蛋白(Hb),构成了一种新型的生物传感器。该传感器可用于测定溶液中的H2O2,线性范围为5.0×10-6～4.5×10-4mol.L-1,检测限为1.0×10-6mol.L-1。The self-seeding approach for the synthesis of MnWO4 nanocrystals has been achieved by the ethylene glycol（EG）-assisted ultrasonic technique using cheap and simple inorganic salts as precursors.SEM images showed that the final products had different structures： particles,flowery bulk and films.The concentration of EG and the application of ultrasonic irradiation were the key factors for the morphology-controllable synthesis of MnWO4 nanostructures.The photocatalytic property of as-synthesized MnWO4 has been studied,which shows excellent photocatalytic activity for the degradation of rhodamine B（RhB） under UV rifadiation.The as-synthesized MnWO4 nanostructures were also immobilized on glass carbon electrode（GCE） to fabricate MnWO4/CHIT/GCE electrode,which enhanced electron transfer for its heme Fe（Ⅲ） to Fe（Ⅱ） redox couple.The MnWO4/CHIT/GCE electrode was further used as efficient supports for the immobilization of hemoglobin（Hb） to fabricate a novel biosensor.The biosensor showed an excellent bioelectrocatalytic activity towards H2O2 with a linear range from 5.0 × 10^-6 to 4.5 × 10^-4 mol·L^-1,and the detection limit was 1.0 × 10^-6 mol·L^-1 at 3σ.

关 键 词：钨酸锰 超声合成 光催化 罗丹明B 牛血红蛋白 生物传感器 

分 类 号：O614.711[理学—无机化学]