Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, Tamilnadu, India.
Smart Materials Interface Laboratory, Department of Physics, Periyar University, Salem, Tamilnadu, India.
Chemosphere. 2021 May;270:128616. doi: 10.1016/j.chemosphere.2020.128616. Epub 2020 Oct 14.
Metal organic framework (MOF) supported layered triple hydroxide (LTH) 2D/2D hybrid material was prepared by a simple hydrothermal method. The photophysical properties of the prepared samples were investigated through a set of analytical methods such as X-ray diffraction, Fourier-transform infrared spectroscopy, field emission scanning electron microscope, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy and mapping. The photocatalytic degradation activity of as prepared 2D/2D MOF-5/LTH hybrid sample was investigated against methylene blue (MB) dye under the UV-visible light irradiation. The degradation efficiency of the MOF-5/LTH hybrid sample was twice a time greater than that of pristine MOF-5, particularly degradation efficiency of the MOF-5, LTH and MOF-5/LTH hybrid samples are 43.3, 57.7 and 98.1% respectively. The Pseudo first order rate and the reusing investigation was further used to study the catalytic activity and stability of the as-synthesized 2D/2D photocatalyst. The observed improvement in the photocatalytic activity of the hybrid samples were owed to enhance visible light absorption, efficient separation and transportation of photoinduced electrons and holes.
采用简单的水热法制备了金属有机骨架（MOF）负载层状氢氧化物（LTH）二维/二维混合材料。通过一系列分析方法，如 X 射线衍射、傅里叶变换红外光谱、场发射扫描电子显微镜、高分辨率透射电子显微镜、能谱和mapping，研究了所制备样品的光物理性质。在紫外-可见光照射下，考察了所制备的二维/二维 MOF-5/LTH 混合样品对亚甲基蓝（MB）染料的光催化降解活性。MOF-5/LTH 混合样品的降解效率是原始 MOF-5 的两倍，特别是 MOF-5、LTH 和 MOF-5/LTH 混合样品的降解效率分别为 43.3%、57.7%和 98.1%。进一步采用拟一级动力学和重复使用实验研究了合成的二维/二维光催化剂的催化活性和稳定性。混合样品光催化活性的提高归因于增强了可见光吸收、光生电子和空穴的有效分离和传输。
