TiO2基光电化学传感器电极结构调控的研究进展

Research Progress on Electrode Structure Regulation of TiO2-based Photoelectrochemical Sensor

TiO2因具有无毒、廉价、化学稳定性好以及表面易修饰生物基团等优点,受到研究者的广泛关注。然而,TiO2存在对太阳能可见光利用率低、光生电子空穴易发生复合等缺点。通过与窄带隙半导体、有机分子、碳材料和贵金属等材料复合,可提高TiO2的光吸收能力、光生电子空穴分离能力,进而拓展TiO2的实际应用领域。本文对基于TiO2的光电化学传感器的研究进展进行了概述,其中重点介绍了通过TiO2纳米材料的改性来提高TiO2基光电化学传感器的传感性能,最后提出了TiO2复合纳米材料光电化学传感器的优势和不足,展望了其未来发展趋势。

TiO2 has attracted considerable attentions from researchers due to its advantages of non-toxicity,low cost,good chemical stability and easy modification of biological groups.However,TiO2 has disadvantages such as low utilization of solar visible light,and easy recombination of photogenerated electron-hole pairs,which greatly hampers its researches and potential utilities.In order to solve these problems,the method of constructing composite nanomaterials with narrow bandgap semiconductors,organic molecules,carbon materials and noble metals were applied to modify TiO2.This paper reviews the progress and present status of TiO2 photoelectrochemical sensors,and introduces the improvement of sensing performance of TiO2 photoelectrochemical sensors through modification of TiO2 nanomaterials.Finally,the advantages and disadvantages of TiO2 composite nanomaterials photoelectrochemical sensors are presented,and the future development trend of TiO2 photoelectrochemical sensors is prospected.