The widespread application of phenolic substances in the field of food, medicine and industry, is harmful to the environment and human health. Therefore, it is very important to develop a convenient and effective method to detect and degrade phenolic compounds. Herein, we report a new keggin-type polyoxometallate-based metal-organic complex self-assembled under solvothermal condition, {[Cu(dap)(3-PA)]₄(SiW₁₂O₄₀)(H₂O)₂}·2H₂O (1, dap = 1,2-diaminopropane, 3-HPA = 3-pyridineacrylic acid). 1 shows an interesting 1D ladder-like structure. As a bifunctional catalyst, 1 can be employed as a colorimetric sensor toward phenol with the relatively low detection limit (LOD) of 0.36 μmol/L (S/N = 3) in the wide range (0.001–0.1 mmol/L). The title colorimetric sensor is applied to determine phenol in various water environment with good recoveries ranging from 95%–105%. In addition, 1 also exhibits excellent photocatalytic degradation toward phenol under visible light with the highest removal efficiency at 96% for 100 min and wide pH universality. The selectivity, stability and reliability of the detection of 1 towards phenol, as well as the detection for 4-chlorophenol, o-cresol, 4-nitrophenol and phloroglucinol were studied. Furthermore, the photocatalytic reaction kinetics and the mechanisms of photodegradation of phenol were also investigated in detail.

酚类物质在食品、医药和工业领域的广泛应用，对环境和人体健康有害。因此，开发一种方便有效的检测和降解酚类化合物的方法非常重要。在此，我们报道了一种在溶剂热条件下自组装的新型keggin型多金属氧酸盐基金属有机配合物，{[Cu(dap)(3-PA)] ₄ (SiW ₁₂ O ₄₀ )(H ₂ O) ₂ }· 2H ₂ O（1，dap = 1,2-二氨基丙烷，3-HPA = 3-吡啶丙烯酸）。图 1显示了一个有趣的一维梯状结构。作为一种双功能催化剂，1可以用作苯酚的比色传感器，在较宽的范围（0.001–0.1 mmol/L）内具有相对较低的检测限（LOD）为0.36 μmol/L（S/N = 3）。该比色传感器适用于测定各种水环境中的苯酚，回收率良好，范围为95%~105%。此外，1还在可见光下表现出优异的光催化降解苯酚的能力，100分钟内去除效率最高可达96%，并且具有广泛的pH通用性。研究了1对苯酚的检测以及4-氯苯酚、邻甲酚、4-硝基苯酚和间苯三酚的检测的选择性、稳定性和可靠性。此外，还详细研究了光催化反应动力学和光降解苯酚的机理。