Exploring the Effect of Morphologies of Fe(III) Metal‐Organic Framework MIL‐88A(Fe) on the Photocatalytic Degradation of Rhodamine B,ChemistrySelect

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Exploring the Effect of Morphologies of Fe(III) Metal‐Organic Framework MIL‐88A(Fe) on the Photocatalytic Degradation of Rhodamine B
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-07-02 , DOI: 10.1002/slct.202001670
Vandana P. Viswanathan ₁ , Siji V. Mathew ₁ , Deepak P. Dubal ₂ , Nayarassery N. Adarsh ₃ , Suresh Mathew _{1,

3}

Affiliation

Metal‐organic frameworks built from [Fe₃(μ₃‐O)(COO)₆] clusters and fumaric acid ligand, the so‐called MIL‐88 A(Fe) is a well‐known environment‐friendly promising material for many applications. In this paper, three different morphologies of MIL‐88 A(Fe) such as rod, diamond and spindle have been synthesized separately by reacting FeCl₃•6H₂O and fumaric acid in 1 : 1 metal‐ligand stoichiometric ratio using two different solvents such as water and DMF via hydrothermal method. The morphology of the products and their particle sizes were obtained using SEM and three distinct morphologies viz., rod, diamond and spindle were clearly distinguished by TEM. All the three samples were characterized by FT‐IR, PXRD, UVDRS, PL, XPS and BET, and the effect of the morphologies of MIL‐88 A(Fe) on the photocatalytic degradation of Rhodamine B (RhB) was studied under sunlight. The addition of an H₂O₂ electron acceptor can markedly enhance the photocatalytic Rhodamine B degradation of MIL‐88 A(Fe). Among these three, rod‐shaped morphology of MIL‐88 A(Fe) shows the higher photocatalytic effect for the degradation of Rhodamine B under sunlight due to its lower band gap, high surface area, and lower electron‐hole recombination rate which enable them the transfer of electrons for the photocatalytic degradation. We found that 98% degradation of RhB in 50 min has taken place by using r‐MIL‐88 A(Fe) as the catalyst under sunlight.

中文翻译：

探索Fe（III）金属-有机骨架MIL-88A（Fe）的形态对罗丹明B光催化降解的影响

从[铁内置金属有机骨架₃（μ ₃ -O）（COO）₆ ]簇和富马酸配体，即所谓的MIL-88 A（铁）是公知的环境友好型有希望用于许多应用材料。在本文中，通过使FeCl ₃ •6H ₂反应，分别合成了MIL‐88 A（Fe）的三种不同形态，例如棒，金刚石和纺锤体。使用两种不同的溶剂（例如水和DMF）通过水热法以1：1的金属配体化学计量比的O和富马酸。使用SEM获得产物的形态和它们的粒径，并且通过TEM清楚地区分出三种不同的形态，即杆，金刚石和纺锤体。这三个样品均通过FT-IR，PXRD，UVDRS，PL，XPS和BET进行了表征，并研究了MIL-88 A（Fe）的形态对日光下若丹明B（RhB）的光催化降解的影响。H ₂ O _2的添加电子受体可以明显增强MIL-88 A（Fe）的光催化罗丹明B降解。在这三种中，MIL‐88 A（Fe）的棒状形态显示出在日光下对若丹明B的降解具有较高的光催化作用，这是因为其具有较低的带隙，较高的表面积和较低的电子-空穴复合率，这使它们成为可能。电子转移进行光催化降解。我们发现使用r-MIL-88 A（Fe）作为催化剂在阳光下50分钟内RhB的降解率达到98％。

更新日期：2020-07-02

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