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三维Cu-MOF对亚甲蓝的吸附和光催化降解及其机理
引用本文:鲁雪莹,张美丽,任宜霞,王记江,杨晓刚. 三维Cu-MOF对亚甲蓝的吸附和光催化降解及其机理[J]. 无机化学学报, 2023, 39(10): 1991-2002
作者姓名:鲁雪莹  张美丽  任宜霞  王记江  杨晓刚
作者单位:延安大学化学与化工学院, 新能源与新功能材料实验室, 延安 716000;洛阳师范大学化学与化学工程学院, 河南省功能多孔材料重点实验室, 洛阳 471934
基金项目:国家自然科学基金(No.21971100)、陕西省自然科学基金(No.2022JM-095)和榆林市科学技术局项目(No.CXY-2021-126)资助。
摘    要:本文报道了[Cu3(ppda)3(tib)2(H2O)4]·6H2O(Cu-MOF)的合成、结构、吸附和光催化降解性能。在Cu-MOF中,1,4-苯二乙酸(H2ppda)和1,3,5-三(1-咪唑基)苯(tib)配体交替连接Cu离子形成二维层,层与层之间通过trans-ppda2-相互穿插形成稳定的三维结构。Cu-MOF对亚甲蓝(MB)的催化效率为97%,最高反应速率常数为0.019 7 min-1。光催化降解机理:在光的激发下,催化剂表面的光生电子和空穴对发生分离,并与O2、H2O、H2O2反应生成活性物质,将染料降解为CO2和H2O。在MB溶液中加入NaCl(200 g·L-1)后,Cu-MOF的吸附量有所提升(87.23 mg·g

关 键 词:金属有机骨架  染料污染物  光催化活性  吸附性能
收稿时间:2023-03-17
修稿时间:2023-09-02

Adsorption, photocatalytic degradation, and their mechanisms of methylene blue on three-dimensional Cu-MOF
LU Xue-Ying,ZHANG Mei-Li,REN Yi-Xi,WANG Ji-Jiang,YANG Xiao-Gang. Adsorption, photocatalytic degradation, and their mechanisms of methylene blue on three-dimensional Cu-MOF[J]. Chinese Journal of Inorganic Chemistry, 2023, 39(10): 1991-2002
Authors:LU Xue-Ying  ZHANG Mei-Li  REN Yi-Xi  WANG Ji-Jiang  YANG Xiao-Gang
Affiliation:Department of Chemistry and Chemical Engineering, Laboratory of New Energy & New Function Materials, Yan''an University, Yan''an, Shaanxi 716000, China; College of Chemistry and Chemical Engineering, Luoyang Normal University, Henan Province Function-Oriented Porous Materials Key Laboratory, Luoyang, Henan 471934, China
Abstract:Herein, we report the synthesis, structure, adsorption and photocatalytic degradation properties of a novel metal-organic framework [Cu3(ppda)3(tib)2(H2O)4]·6H2O (Cu-MOF) by the selection of the flexible 1,4-phenylenedi- acetic acid (H2ppda) and the rigid 1,3,5-tris(1-imidazolyl) benzene (tib). In Cu-MOF, ppda2- and tib ligands alternately link Cu ions to form 2D polymeric layers, the layer and layer interpenetrate each other by trans-ppda2- to form a stable 3D structure. Cu-MOF has excellent thermal stability and semiconductor properties, so it can be used as a catalyst. Cu-MOF had the best catalytic effect on methylene blue (MB), with a catalytic efficiency of up to 97% and the highest reaction rate constant of 0.019 7 min-1. The main photocatalytic degradation mechanism is the separation of the photogenerated electron and hole pair of the catalyst under the light excitation, and the redox reaction occurs to produce the active species to degrade the dye and eventually decompose into carbon dioxide and water. Cu - MOF exhibited high adsorption capacity after adding NaCl (200 g·L-1) to MB solution (87.23 mg·g-1). The adsorption process is a spontaneous monolayer chemisorption process illustrated by the pseudo-second-order kinetic and Langmuir isotherm models and thermodynamic studies. CCDC: 2219373.
Keywords:metal-organic framework  dye contaminant  photocatalytic activity  adsorption property
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