Huang Wangqiang, Cheng Yajie, Fei Xing, Xu Wangwen, Chang Shuang, Song Shaodong, Huang Changbo
Nanzhang County People's Hospital, Xiangyang, 441000, People's Republic of China.
Department of Stomatology, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.
Mikrochim Acta. 2020 Sep 28;187(10):583. doi: 10.1007/s00604-020-04516-z.
BiWO (BW) was compounded with different contents of copper sulfide (CuS) by a two-step procedure. The chemical composition and morphology of the materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results of photoelectrochemical (PEC) tests showed that CuS can improve the PEC performance of semiconductor materials and it has the best performance when the CuS mass fraction is 5%. Therefore, CuS/BW-5% nanocomposite has been constructed as ofloxacin (OFL) drug PEC aptasensors by binding of aptamer receptors. The PEC aptasensor based on CuS/BW-5% has a linear relationship for OFL of 1-12,000 nM and a determination limit of 0.35 nM. Since the photoelectron potential generated by CuS/BW-5% heterojunction reduces the combination of photogenerated electrons and holes CuS/BW-5% has a better photoelectrocatalytic performance. Graphical abstract Schematic presentation of a photoelectrochemical aptasensor based on CuS/BiWO for the determination of OFL.
通过两步法将BiWO（BW）与不同含量的硫化铜（CuS）进行复合。采用X射线衍射、X射线光电子能谱、扫描电子显微镜和透射电子显微镜对材料的化学成分和形貌进行了表征。光电化学（PEC）测试结果表明，CuS可以提高半导体材料的PEC性能，当CuS质量分数为5%时性能最佳。因此，通过适配体受体的结合构建了CuS/BW-5%纳米复合材料作为氧氟沙星（OFL）药物PEC适体传感器。基于CuS/BW-5%的PEC适体传感器对OFL的线性关系为1-12000 nM，测定限为0.35 nM。由于CuS/BW-5%异质结产生的光电子势降低了光生电子和空穴的复合，CuS/BW-5%具有更好的光电催化性能。基于CuS/BiWO的光电化学适体传感器用于测定OFL的示意图。
