Liu Xing, Lv Xujiao, Lai Hua, Peng Gang, Yi Zhengji, Li Junhua
College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, China.
Key Laboratory of Functional Metal-Organic Compounds of Hunan Province & Key Laboratory of Functional Organometallic Materials of College of Hunan Province, Hengyang Normal University, Hengyang, China.
Photochem Photobiol. 2020 Nov;96(6):1169-1175. doi: 10.1111/php.13290. Epub 2020 Jun 25.
Metal-organic frameworks (MOF) are recently developed coordination porous materials, and their unique structures are very conducive to catalytic reactions. In this paper, p-benzenedicarboxylic acid (PBA)-Ni MOF materials (denoted as PBA-Ni-x, where x represents the initial ratio of PBA to Ni ) were synthesized by a hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N gas adsorption. H gas was produced using the synthesized MOF as a photocatalyst and Eosin Y as a photosensitizer. The dependence of the special surface area and thickness of the nanosheets of Ni-MOF on the initial ratio of PBA to Ni (PBA/Ni ) was investigated. The BET surface areas of PBA-Ni-1 PBA-Ni-2 and PBA-Ni-3 are 11.00, 24.61 and 13.04 m g , respectively. And the thicknesses of nanosheets are approximately 600-1000, 200-500 and 300-700 nm. Among the three materials, PBA-Ni-2 has the thinnest sheet-like structure and largest surface area. Thus, it displays the highest H evolution rate of 20.0 μmol h . The noble-metal-free hydrogen production system is valuable for the application of MOF materials in photocatalytic water splitting.
金属有机框架材料（MOF）是近年来开发的配位多孔材料，其独特结构非常有利于催化反应。本文采用水热法合成了对苯二甲酸（PBA）-镍MOF材料（表示为PBA-Ni-x，其中x代表PBA与镍的初始比例），并通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、热重分析（TGA）和N₂气体吸附进行了表征。以合成的MOF为光催化剂、曙红Y为光敏剂产生H₂气体。研究了镍基MOF纳米片的比表面积和厚度对PBA与镍初始比例（PBA/Ni）的依赖性。PBA-Ni-1、PBA-Ni-2和PBA-Ni-3的BET比表面积分别为11.00、24.61和13.04 m²/g。纳米片的厚度约为600 - 1000、200 - 500和300 - 700 nm。在这三种材料中，PBA-Ni-2具有最薄的片状结构和最大的表面积。因此，它显示出最高的析氢速率，为20.0 μmol/h。这种无贵金属的制氢系统对于MOF材料在光催化水分解中的应用具有重要价值。
