Bovine serum albumin (BSA) and glycine (Gly) dual-ligand-modified copper nanoclusters (BSA-Gly CuNCs) with high fluorescence intensity were synthesized by a one-pot strategy. Based on the competitive fluorescence quenching and dynamic quenching effects of ornidazole (ONZ) on BSA-Gly CuNCs, a simple and sensitive detection method for ONZ was successfully developed. The experimental results demonstrate that the addition of the small molecule Gly can more effectively protect CuNCs, and thus enhance its fluorescence intensity and stability. The proposed assay allowed for the detection of ONZ in a linear range of 0.28 to 52.60 μmol·L^-1 and a detection limit of 0.069 μmol·L^-1. Compared with the single-ligand-modified CuNCs, dual-ligand-modified BSA-Gly CuNCs had higher fluorescence intensity, stability, and sensing ability and were successfully applied to evaluate ONZ in actual ONZ tablets.

Mo₂C MXene(Mo₂CT_x)由于其表面Mo活性位点具有类Pt的电子结构在光催化中展现出优异的析氢潜力。然而，Mo₂CT_x中的Mo位点在析氢反应(HER)过程中通常表现出过强的H吸附能力，显著限制了Mo₂CT_x的本征催化活性。为了削弱Mo活性位点的H吸附能力，本论文通过功函数诱导效应原位构建MoC-Mo₂C MXene异质结，实现了d轨道电子的调控。利用Co诱导的熔盐法将Mo₂C MXene原位转化为MoC，随后通过简单的超声辅助方法与TiO₂耦合，制备了MoC-Mo₂CT_x/TiO₂光催化剂。光催化产氢测试表明，最优的MoC-Mo₂CT_x/TiO₂样品实现了1886 μmol∙h⁻¹∙g⁻¹的产氢速率，分别是TiO₂和Mo₂CF_x/TiO₂(Mo₂CF_x通过常规蚀刻剂NH₄F+HCl制备)的117.9倍和3.9倍。实验和理论计算证实，MoC与Mo₂C MXene之间的功函数梯度诱导电子从MoC向Mo₂C MXene转移，从而削弱了Mo₂CT_x助催化剂中Mo活性位点的H吸附能力，进而提升了其HER活性。该研究为原位构建基于Mo₂C MXene的异质结以调控Mo活性位点的H吸附能力提供了一种新策略。