电化学还原法增强Mg-TiO_2纳米点基生物传感器电极性能（英文）  

Enhanced Sensitivity of Mg-doped TiO_2 Nanodots Modified Biosensor Electrodes by Electrochemical Reduction Treatment

作　　者：M.S.H.Al-Furjan 孙思祥[2] 程逵[2] 翁文剑[2] M. S. H. Al-Furjan SUN Sixiang CHENG Kui WENG Wenjian(School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Centre for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]杭州电子科技大学机械工程学院,杭州310018 [2]浙江大学材料科学与工程学院,硅材料国家重点实验室,唐仲英传感材料与应用中心,杭州310027

出　　处：《硅酸盐学报》2017年第1期113-119,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51272228,51372217,51472216);浙江省自然科学基金项目(LY15E020004)

摘　　要：采用溶胶-凝胶法在钛基板上制备了镁掺杂的二氧化钛(Mg-TiO_2)纳米点薄膜,并通过电化学还原时所吸附的酶与基板之间的直接电子传递,改善了纳米点和Ti基板之间的电导率。研究发现:电化学还原处理后纳米点表面的三价钛含量显著增高,有效地提高了直接电子转移;可以增强生物传感器电极的灵敏度。相应的过氧化氢传感器灵敏度达到了1 825.6μA/(mmol·L^(-1)·cm^2)。电化学还原处理有效地提高了传感器灵敏度。Electrodes play a crucial role in hydrogen peroxide （H2O2） electrochemical biosensors. In this paper, Mg-doped TiO2 nanodots were formed on Ti as an electrode substrate by a sol-gel technique. An electrochemical reduction treatment was adopted to improve the direct electron transfer between the working enzyme and the substrate. The results show that Ti3＋ on the surface of Mg-doped TiO2 nanodots clearly increases after the treatment. Biosensors based on such electrodes show a greater response to H2O2, a better direct electron transfer and a greater detection sensitivity. The optimal sensitivity to H2O2 reaches 1825.6 μA/（mmolL-1cm2）. Such a reduction treatment represents a facile and effective route to improve the sensitivity of TiO2 modified biosensor electrodes.

关 键 词：镁掺杂二氧化钛 纳米点薄膜 电化学还原 生物传感器电极 过氧化氢 

分 类 号：TB39[一般工业技术—材料科学与工程]