Yu Siyuan, Chen Xia, Huang Chaobiao, Han Deman
College of Chemistry and Life Sciences, Zhejiang Normal University Jinhua 321004 China
Department of Chemistry, Taizhou University Jiaojiang, 318000 China
RSC Adv. 2019 Sep 9;9(48):28276-28283. doi: 10.1039/c9ra05385a. eCollection 2019 Sep 3.
In this work, on the basis of a Cu-doped two-dimensional material-based heterojunction photoelectrode, a novel anodic photoelectrochemical (PEC) sensing platform was constructed for highly sensitive detection of endogenous HS. Briefly, with g-CN and TiO as representative materials, the sensor was fabricated by modifying g-CN/TiO nanorod arrays (NAs) onto the surface of fluorine-doped tin oxide (FTO) and then doping Cu as a Cu S ( = 1, 2) precursor. After the binding of S with surface-attached Cu, the signal was quenched owing to the generation of Cu S which offers trapping sites to hinder generation of photocurrent signals. Since the photocurrent inhibition was intimately associated with the concentration of S, a highly sensitive PEC biosensor was fabricated for HS detection. More importantly, the proposed sensing platform showed the enormous potential of g-CN/TiO NAs for further development of PEC bioanalysis, which may serve as a common basis for other semiconductor applications and stimulates the exploration of numerous high-performance nanocomposites.
在这项工作中，基于铜掺杂的二维材料基异质结光电极，构建了一种新型的阳极光电化学（PEC）传感平台，用于高灵敏度检测内源性HS。简要地说，以g-CN和TiO为代表材料，通过将g-CN/TiO纳米棒阵列（NAs）修饰到氟掺杂氧化锡（FTO）表面，然后掺杂铜作为Cu₂S（x = 1, 2）前驱体来制备传感器。S与表面附着的Cu结合后，由于生成了提供捕获位点以阻碍光电流信号产生的Cu₂S，信号被猝灭。由于光电流抑制与S的浓度密切相关，因此制备了一种用于HS检测的高灵敏度PEC生物传感器。更重要的是，所提出的传感平台展示了g-CN/TiO NAs在PEC生物分析进一步发展方面的巨大潜力，这可能作为其他半导体应用的共同基础，并激发对众多高性能纳米复合材料的探索。
