以2-氨基对苯二甲酸(H₂ATA)为配体，通过溶剂热法合成了Zr基MOF：NH₂-UiO-66，继而以氯化钨为前驱体，通过溶剂热法实现了富含氧空位的缺陷氧化钨(W₁₈O₄₉)在NH₂-UiO-66上的原位生长，构建了具有典型Ⅱ型异质结的复合光催化剂W₁₈O₄₉/NH₂-UiO-66。通过粉末X射线衍射、扫描电子显微镜、X射线光电子能谱和紫外可见漫反射光谱对催化剂的组成与结构进行了表征。在室温常压、模拟太阳光下，以氧化苯乙烯为模型底物，对所有样品的光催化活性进行了考察，W₁₈O₄₉/NH₂-UiO-66展现了最高的碳酸苯乙烯酯产率(58 mmol·g^-1·h^-1)。

In this work, p-phenylenediamine and L-cysteine were used as raw materials, and water-soluble N, S co-doped carbon dots (N, S-CDs) with excellent performance were prepared through a one-step solvothermal method. The morphology and structure of N, S-CDs were characterized by transmission electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, and the basic photophysical properties were investigated via UV-Vis absorption spectra and fluorescence spectra. Meanwhile, the N, S-CDs have excellent luminescence stability with pH, ionic strength, radiation time, and storage time. Experimental results illustrated the present sensor platform exhibited high sensitivity and selectivity in response to baicalein with a detection limit of 85 nmol·L^-1. The quenching mechanism is proved to be the inner filter effect. In addition, this sensor can also detect baicalein in biofluids (serum and urine) with good accuracy and reproducibility.