Photocatalytic properties of a binuclear Cd-complex to different types of harmful organic pollutants

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Transition Metal Chemistry Pub Date : 2022-11-01 DOI:10.1007/s11243-022-00516-5

Dawei Wang, Jing Yang, Ping Zhao, Zhengjun Shi

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引用次数: 2

Abstract

A binuclear cadmium complex Cd₂(biba)₄ (Hbiba = 2-(1H-benzoimidazol-2-yl)benzoic acid) has been successfully synthesized via solvothermal method, and characterized by single-crystal x-ray diffraction, elemental analysis, infrared spectroscopy, UV–Vis diffuse reflectance spectroscopy, thermogravimetric analysis, and x-ray powder diffraction. Molecular structural analysis showed that each Cd₂(biba)₄ monomer was connected to four neighbors via intermolecular hydrogen bonds to form a 2D supramolecular structure. Fluorescence emission spectrum of Cd₂(biba)₄ was also measured in the solid state. Complex Cd₂(biba)₄ exhibited good photocatalytic activities for the degradation of methylene blue (MB) dye, sulfadiazine (SD) antibiotic and forchlorfenuron (CPPU) phytohormone under UV irradiation at room temperature. Reaction kinetics studies suggested that the photodegradation of MB, SD and CPPU were in accordance with the pseudo-first-order kinetic model. The photodegradation mechanism of MB, SD and CPPU catalyzed by Cd₂(biba)₄ was also discussed in detail. This paper presents important examples for the photodegradation of antibiotic and phytohormone using metal–organic complex as catalyst.

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双核cd配合物对不同类型有害有机污染物的光催化性能

采用溶剂热法成功合成了双核镉配合物Cd2(biba)4 (Hbiba = 2-(1h -苯并咪唑-2-基)苯甲酸)，并用单晶x射线衍射、元素分析、红外光谱、紫外-可见漫反射光谱、热重分析和x射线粉末衍射对其进行了表征。分子结构分析表明，每个Cd2(biba)4单体通过分子间氢键与四个相邻单体相连，形成二维超分子结构。测定了固体状态下Cd2(biba)4的荧光发射光谱。配合物Cd2(biba)4在室温紫外光照射下对亚甲基蓝(MB)染料、磺胺嘧啶(SD)抗生素和氯吡脲(CPPU)植物激素具有良好的光催化活性。反应动力学研究表明，MB、SD和CPPU的光降解符合准一级动力学模型。详细讨论了Cd2(biba)4催化光降解MB、SD和CPPU的机理。本文介绍了以金属有机配合物为催化剂光降解抗生素和植物激素的重要实例。

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.