噻吩醛缩乙二胺席夫碱及其配合物的合成与光催化性能

doi:10.11944/j.issn.1000-0518.2019.08.180415

摘要/Abstract

摘要：

基于TiO₂光催化性能的染料敏化改性,采用2-噻吩甲醛缩合乙二胺合成了席夫碱配体L,并与金属配合得到了金属配合物[ZnLCl₂](1),[NiL'(NO₃)₂](2)(L'为单噻吩醛缩乙二胺),对配体L、配合物1 和2进行了X射线单晶衍射结构分析。用合成的配体和配合物修饰TiO₂得到相应的复合光催化剂L-TiO₂、1-TiO₂和2-TiO₂,并进行了红外光谱、紫外-可见漫反射光谱、粉末X射线衍射图谱等表征,研究了这3种光催化剂降解水中有机污染物4-硝基酚(4-NP)和罗丹明B(RhB)的催化活性。结果表明,1-TiO₂、2-TiO₂可以有效的降解4-NP和RhB,降解率可达90%以上。

关键词: 2-噻吩甲醛, 席夫碱, 金属配合物, 二氧化钛, 光催化降解

Abstract:

The ligand N,N'-bis(thiophenaldehyde) ethylenediamine(L) obtained by the condensation between 2-thiophene carboxaldehyde and ethylenediamine were used for synthesis of new complexes [ZnLCl₂](1) and [NiL'(NO₃)₂](2)(L'-thiophenaldehyde-ethylenediamine). The structures of these complexes and ligand were characterized by single crystal X-ray analysis. These compounds were used for modifying the surface of TiO₂. The obtained photocatalysts(L-TiO₂, 1-TiO₂, 2-TiO₂) were characterized by IR spectra, UV-Vis diffuse reflectance spectroscopy and XRD. Their photocatalytic activities in the photodegradation of 4-nitrophenol(4-NP) and Rhodamine B(RhB) were evaluated under UV-visible light irradiation. The results revealed higher photocatalytic activities of 1-TiO₂ and 2-TiO₂ than that of bare TiO₂. In addition, the degradation rate can reach above 90%.

Key words: 2-thiophenealdehyde, Schiff base, metal complexes, titanium dioxide, photocatalytic degradation

黑嘉慧, 杨莉宁, 李珺. 噻吩醛缩乙二胺席夫碱及其配合物的合成与光催化性能[J]. 应用化学, 2019, 36(8): 949-957.

HEI Jiahui, YANG Lining, LI Jun. Synthesis and Photocatalysis of Metal Complexes with Schiff Base Derived from 2-Thiophene Carboxaldehyde and Ethylenediamine[J]. Chinese Journal of Applied Chemistry, 2019, 36(8): 949-957.

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