Effective Photocatalytic Activity of Mixed Ni/Fe-Base Metal-Organic Framework under a Compact Fluorescent Daylight Lamp

Mixed Ni/Fe-base metal-organic framework (Ni/Fe-MOF) with different molar ratios of Ni2+/Fe3+ have been successfully produced using an appropriate solvothermal router. Physicochemical properties of all samples were characterized using X-ray diffraction (XRD), Raman, field emission scanning electron microscopes (FE-SEM), fourier-transform infrared spectroscopy (FT-IR), N2 adsorption-desorption analysis, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), and photoluminescence spectra (PL). The photocatalytic degradation performances of the photocatalysts were evaluated in the decomposition of rhodamine B (RhB) under a compact fluorescent daylight lamp. From XRD, IR, XPS, and Raman results, with the presence of mixed ion Fe3+ and Ni2+, MIL-88B (MIL standing for Materials of Institut Lavoisier) crystals based on the mixed metal Fe2NiO cluster were formed, while MIL-53(Fe) was formed with the presence of single ion Fe3+. From UV-Vis DRS results, Ni/Fe-MOF samples exhibited the absorption spectrum up to the visible region, and then they showed the high photocatalytic activity under visible light irradiation. A Ni/Fe-MOF sample with a Ni2+/Fe3+ molar ratio of 0.3 showed the highest photocatalytic degradation capacity of RhB, superior to that of the MIL-53(Fe) sample. The obtained result could be explained as a consequence of the large surface area with large pore volumes and pore size by the Ni2+ incorporating into the MOF’s structure. In addition, a mixed metal Fe/Ni-based framework consisted of mixed-metal cluster Fe2NiO with an electron transfer effect and may enhance the photocatalytic performance.

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Metal-Organic Framework MIL-101: Synthesis and Photocatalytic Degradation of Remazol Black B Dye

Journal of Nanomaterials ◽

10.1155/2019/6061275 ◽

2019 ◽

Vol 2019 ◽

pp. 1-15 ◽

Cited By ~ 4

Author(s):

Pham Dinh Du ◽

Huynh Thi Minh Thanh ◽

Thuy Chau To ◽

Ho Sy Thang ◽

Mai Xuan Tinh ◽

...

Keyword(s):

Photocatalytic Degradation ◽

Photoelectron Spectroscopy ◽

Metal Organic Framework ◽

Nitrogen Adsorption ◽

X Ray ◽

Remazol Black B ◽

Metal Organic ◽

Degradation Reaction ◽

Remazol Black ◽

Organic Framework

In the present paper, the synthesis of metal-organic framework MIL-101 and its application in the photocatalytic degradation of Remazol Black B (RBB) dye have been demonstrated. The obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption/desorption isotherms at 77 K. It was found that MIL-101 synthesized under optimal conditions exhibited high crystallinity and specific surface area (3360 m2·g-1). The obtained MIL-101 possessed high stability in water for 14 days and several solvents (benzene, ethanol, and water at boiling temperature). Its catalytic activities were evaluated by measuring the degradation of RBB in an aqueous solution under UV radiation. The findings show that MIL-101 was a heterogeneous photocatalyst in the degradation reaction of RBB. The mechanism of photocatalysis was considered to be achieved by the electron transfer from photoexcited organic ligands to metallic clusters in MIL-101. The kinetics of photocatalytic degradation reaction were analyzed by using the initial rate method and Langmuir-Hinshelwood model. The MIL-101 photocatalyst exhibited excellent catalytic recyclability and stability and can be a potential catalyst for the treatment of organic pollutants in aqueous solutions.

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A bifunctional cationic metal–organic framework based on unprecedented nonanuclear copper(ii) cluster for high dichromate and chromate trapping and highly efficient photocatalytic degradation of organic dyes under visible light irradiation

Dalton Transactions ◽

10.1039/c8dt01685b ◽

2018 ◽

Vol 47 (27) ◽

pp. 9103-9113 ◽

Cited By ~ 24

Author(s):

Tian-Rui Zheng ◽

Lin-Lu Qian ◽

Min Li ◽

Zhi-Xiang Wang ◽

Ke Li ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Photocatalytic Degradation ◽

Visible Light Irradiation ◽

Organic Dyes ◽

Metal Organic Framework ◽

Light Irradiation ◽

Highly Efficient ◽

Metal Organic ◽

Organic Framework

A bifunctional cationic MOF showed fast and highly efficient Cr2O72− and CrO42− trapping, and highly efficient photocatalytic activity.

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Synthesis, characterization, and photocatalytic degradation properties of ZnO/ZnFe2O4 magnetic heterostructures

New Journal of Chemistry ◽

10.1039/c7nj03373g ◽

2017 ◽

Vol 41 (24) ◽

pp. 15433-15438 ◽

Cited By ~ 19

Author(s):

Yan Xu ◽

Shumin Wu ◽

Xianliang Li ◽

Yehang Huang ◽

Zhuopeng Wang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Photocatalytic Degradation ◽

Metal Organic Framework ◽

High Photocatalytic Activity ◽

Mixed Metal ◽

Magnetic Heterostructures ◽

Metal Organic ◽

One Step ◽

The One ◽

Degradation Properties

A nanosheet-constructed ZnO/ZnFe2O4 composite with high photocatalytic activity is obtained via the one-step pyrolysis of a Zn–Fe mixed-metal–organic framework precursor.

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Synthesis of a novel 2D zinc(ii) metal–organic framework for photocatalytic degradation of organic dyes in water

Dalton Transactions ◽

10.1039/c9dt03727f ◽

2019 ◽

Vol 48 (47) ◽

pp. 17626-17632 ◽

Cited By ~ 13

Author(s):

Jian-Peng Dong ◽

Zhen-Zhen Shi ◽

Bo Li ◽

Li-Ya Wang

Keyword(s):

Photocatalytic Activity ◽

Photocatalytic Degradation ◽

Organic Dyes ◽

Metal Organic Framework ◽

Metal Organic ◽

Organic Framework

A new 2D zinc(ii) metal–organic framework exhibits efficient photocatalytic activity and recyclability towards the degradation of organic dyes in the absence of any photosensitizer or cocatalyst.

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Synthesis and Structure of a Clathrated Two-Dimensional Metal-Organic Framework: [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2·H2O (L = Bis(1-pyrazinylethylidene)hydrazine)

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20080024 ◽

2008 ◽

Vol 73 (1) ◽

pp. 24-31

Author(s):

Dayu Wu ◽

Genhua Wu ◽

Wei Huang ◽

Zhuqing Wang

Keyword(s):

Metal Organic Framework ◽

Channel Structure ◽

Two Dimensional ◽

X Ray Diffraction ◽

Guest Molecules ◽

X Ray ◽

Square Planar ◽

Metal Organic ◽

Aqueous Meoh ◽

Organic Framework

The compound [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2 was obtained by the reaction of Cd(ClO4)2, bis(1-pyrazinylethylidene)hydrazine (L) and 4,4'-bipyridine in aqueous MeOH. Single-crystal X-ray diffraction has revealed its two-dimensional metal-organic framework. The 2-D layers superpose on each other, giving a channel structure. The square planar grids consist of two pairs of shared edges with Cd(II) ion and a 4,4'-bipyridine molecule each vertex and side, respectively. The square cavity has a dimension of 11.817 × 11.781 Å. Two guest molecules of bis(1-pyrazinylethylidene)hydrazine are clathrated in every hydrophobic host cavity, being further stabilized by π-π stacking and hydrogen bonding. The results suggest that the hydrazine molecules present in the network serve as structure-directing templates in the formation of crystal structures.

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Backbonding contributions to small molecule chemisorption in a metal–organic framework with open copper(i) centers

Chemical Science ◽

10.1039/d0sc06038k ◽

2021 ◽

Author(s):

Gregory M. Su ◽

Han Wang ◽

Brandon R. Barnett ◽

Jeffrey R. Long ◽

David Prendergast ◽

...

Keyword(s):

Fine Structure ◽

Small Molecule ◽

Metal Organic Framework ◽

X Ray ◽

Metal Site ◽

Absorption Fine ◽

Metal Organic ◽

X Ray Absorption ◽

Organic Framework

In situ near edge X-ray absorption fine structure spectroscopy directly probes unoccupied states associated with backbonding interactions between the open metal site in a metal–organic framework and various small molecule guests.

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