Dual-Functional Ln-OFs for Efficient Luminescence Sensing and Photoreduction of Cr(VI) without Additional Photosensitizers and Cocatalysts

作者：Shufang Wang, Wenxiao Guo, Yang Liu, Xiaoxue Ma, Lu Zhang, Hongguo Hao, Xiaolei Shi, Hui Yan, Xiangjin Kong, Jie Yin, Huawei Zhou, Xia Li, Lingqian Kong, Guifang Chen, Xiuping Ju, Yan Yang, Hongjie Zhu, Yun‐Wu Li, Fangna Dai · 发表于：Crystal Growth & Design · 年份：2023 · DOI：10.1021/acs.cgd.2c01534 · 被引用次数：14 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Advanced Nanomaterials in Catalysis、Nanocluster Synthesis and Applications

Six isostructural stable lanthanide metal–organic Frameworks (Ln-OFs), namely, [Ln(ADBA)(HCOO)(DMF)] (Ln = Sm( 1 ), Tb( 2 ), Dy( 3 ), Ho( 4 ), Er( 5 ), Eu( 6 ), H 2 ADBA = 4,4′-(anthracene-9,10-diyl)dibenzoate, DMF = N, N -dimethylformamide), have been successfully obtained by the solvothermal method based on an aromatic carboxylic acid ligand H 2 ADBA. 1 – 6 have a similar three dimensional (3D) network structure with pts topology based on dinuclear metallic clusters {Ln 2 }. 1 – 6 all have excellent chemical and thermal stabilities, which is beneficial to carrying out fluorescence sensing and achieving catalytic reactions. 1 – 6 show admirable fluorescent properties in aqueous solution and can quickly and efficiently detect Fe 3+, Cr 2 O 7 2–, and nitrofurazone (NZF) with high selectivity and excellent sensitivity. Remarkably, upon completion of detection, the Cr 2 O 7 2– ion in wastewater can be reduced into Cr 3+ by photocatalyst 1, which is ascribed to its broad-range visible-light absorption and recyclable stability. During the reduction process, ethanol is an optimal hole scavenger; 1 shows an excellent convert efficiency (99%), a high rate constant ( k ) of 0.066 min –1, and a high Cr(VI) reduction rate of 0.158 mg Cr(VI) ·g –1 cata ·min –1 at pH = 2. Furthermore, photocatalyst 1 can be reused for three cycles without significant loss of catalytic activity. Until now, it is the first example to report that the photocatalytic reduction of Cr(VI) is achieved only by usi...