Photocatalysis technology is a promising method for air pollution control, but its further application is limited by low charge separation efficiency and poor conductivity. In this paper, the optical properties of NH-UiO-66 are modified by a ligand defect strategy to enhance the photocatalytic oxidation of NO under visible light. The existence of defects has been confirmed through XPS, BET, and TGA characterization analysis. Meanwhile, the UV–Vis, photoluminescence (PL), and photoelectrochemical analysis demonstrate that the charge separation efficiency and electrical conductivity of the medium-structured defective sample (NU-66-80) have been significantly enhanced. Furthermore, in the photocatalytic NO removal experiment, the optimal sample (NU-66-80) exhibited a NO removal rate of 51.12 %, which is 2.91 times that of the pristine sample, and the conversion rate of NO to NO/NO is comparable to the removal rate, effectively inhibiting the generation of toxic by-products (NO). Finally, ESR and FT-IR are combined to explore the transformation path of NO, in which active substances (ROS) are the key to the transformation of NO into low-toxicity products. This study will provide an interesting strategy for constructing defects in MOFs photocatalysts to solve typical air pollution problems.

中文翻译：

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NH2-UiO-66(Zr)的结构缺陷策略增强光催化NO去除活性并同步抑制NO2

光催化技术是一种很有前景的空气污染控制方法，但其进一步应用受到电荷分离效率低和导电性差的限制。本文通过配体缺陷策略改变NH-UiO-66的光学性质，以增强可见光下NO的光催化氧化。通过XPS、BET和TGA表征分析证实了缺陷的存在。同时，紫外-可见光、光致发光（PL）和光电化学分析表明，中等结构缺陷样品（NU-66-80）的电荷分离效率和电导率显着增强。此外，在光催化NO去除实验中，最优样品（NU-66-80）的NO去除率为51.12%，是原始样品的2.91倍，并且NO向NO/NO的转化率相当提高去除率，有效抑制有毒副产物（NO）的产生。最后，结合ESR和FT-IR探索NO的转化路径，其中活性物质（ROS）是NO转化为低毒产物的关键。这项研究将为构建 MOF 光催化剂的缺陷以解决典型的空气污染问题提供一个有趣的策略。