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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。
Magnesium-doped titanium dioxide (Mg-TiO 2) nanodots thin films were prepared on titanium substrate by sol-gel method. The direct electron transfer between the adsorbed enzyme and the substrate during electrochemical reduction improved the nanodots and Conductivity between Ti substrates. The results show that the content of trivalent titanium on the surface of the nanodots after electroreduction treatment is significantly increased, the direct electron transfer can be effectively enhanced, and the sensitivity of the biosensor electrode can be enhanced. The corresponding hydrogen peroxide sensor sensitivity reached 1 825.6μA / (mmol · L -1 · cm ~ 2). Electrochemical reduction effectively increases the sensitivity of the sensor.