Two pure MOF-photocatalysts readily prepared for the degradation of methylene blue dye under visible light†,Dalton Transactions

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Two pure MOF-photocatalysts readily prepared for the degradation of methylene blue dye under visible light†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-02-05 00:00:00 , DOI: 10.1039/c8dt00156a
Ming Zhang _{1,

2,

3,

4} , Liwen Wang _{1,

2,

3,

4} , Tianyu Zeng _{1,

2,

3,

4} , Qigao Shang _{1,

2,

3,

4} , Hong Zhou _{1,

2,

3,

4} , Zhiquan Pan _{1,

2,

3,

4} , Qingrong Cheng _{1,

2,

3,

4,

5}

Affiliation

Two 3D metal–organic frameworks (MOFs) with different structures, [Cu(4,4′-bipy)Cl]_n (1) and [Co(4,4′-bipy)·(HCOO)₂]_n (2), were synthesized by means of a hydrothermal method using a typical ligand (4,4′-bipyridine), and characterized by elemental analyses, thermal analyses and single crystal X-ray diffraction. As MOF materials, the two complexes showed active performance for the photodegradation of methylene blue (MB) dye under visible light. MB degradation over the two MOF-based photocatalysts follows first-order kinetics. The addition of an H₂O₂ electron acceptor can markedly enhance the photocatalytic MB degradation performance via a ligand-to-metal charge transfer mechanism, especially in complex 1. Complex 1 is better than complex 2 in MB photodegradation performance under the same conditions. Moreover, complex 1 showed a stable activity for MB degradation after four consecutive usages. Owing to the advantages of the visible light response, stable structure, low cost and high yield, these MOF-based photocatalysts will facilitate new efforts in environmental purification.

中文翻译：

两种易于制备的纯MOF光催化剂，用于在可见光下降解亚甲基蓝染料†

具有不同结构的两个3D金属有机框架（MOF），[Cu（4,4'-bipy）Cl] _n（1）和[Co（4,4'-bipy）·（HCOO）₂ ] _n（2）通过水热法使用典型的配体（4,4'-联吡啶）合成了，并通过元素分析，热分析和单晶X射线衍射进行了表征。作为MOF材料，这两种配合物在可见光下均表现出对亚甲基蓝（MB）染料光降解的活性。在两种基于MOF的光催化剂上的MB降解遵循一级动力学。加入的H的₂ ö ₂电子受体可以显着地提高光催化降解MB性能通过配体到金属的电荷转移机制，尤其是在配合物中1。复杂的1比复杂好2在相同条件下，MB降解性能。此外，复合物1在连续使用四次后对MB降解表现出稳定的活性。由于具有可见光响应，结构稳定，成本低和产率高的优点，这些基于MOF的光催化剂将促进环境净化方面的新努力。

更新日期：2018-02-05

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