scholarly journals Photoswitchable Zirconium MOF for Light-Driven Hydrogen Storage

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 4052
Author(s):  
Vera V. Butova ◽  
Olga A. Burachevskaya ◽  
Vitaly A. Podshibyakin ◽  
Evgenii N. Shepelenko ◽  
Andrei A. Tereshchenko ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Hydrogen Adsorption ◽  
Uv Light ◽  
Metal Organic Framework ◽  
Light Irradiation ◽  
Open Conformation ◽  
Metal Organic ◽  
Adsorption Desorption

Here, we report a new photosensitive metal–organic framework (MOF) that was constructed via the modification of UiO-66-NH2 with diarylethene molecules (DAE, 4-(5-Methoxy-1,2-dimethyl-1H-indol-3-yl)-3-(2,5-dimethylthiophen-3-yl)-4-furan-2,5-dione). The material that was obtained was a highly crystalline porous compound. The photoresponse of the modified MOF was observed via UV–Vis and IR spectroscopy. Most of the DAE molecules inside of the UiO-66-pores had an open conformation after synthesis. However, the equilibrium was able to be shifted further toward an open conformation using visible light irradiation with a wavelength of 520 nm. Conversely, UV-light with a wavelength of 450 nm initiated the transformation of the photoresponsive moieties inside of the pores to a closed modification. We have shown that this transformation could be used to stimulate hydrogen adsorption–desorption processes. Specifically, visible light irradiation increased the H2 capacity of modified MOF, while UV-light decreased it. A similar hybrid material with DAE moieties in the UiO-66 scaffold was applied for hydrogen storage for the first time. Additionally, the obtained results are promising for smart H2 storage that is able to be managed via light stimuli.

scholarly journals Photocatalytic Degradation of Methylene Blue and Methyl Orange by Y-PTC Metal-Organic Framework

2021 ◽  
Vol 7 (2) ◽  
pp. 129-141
Author(s):  
Adawiah Adawiah ◽  
Muhammad Derry Luthfi Yudhi ◽  
Agustino Zulys
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Framework ◽  
Light Irradiation ◽  
Bandgap Energy ◽  
Metal Organic ◽  
Organic Framework

The yttrium based metal-organic framework (MOF) Y-PTC was synthesized by the solvothermal method using perylene as the linker and yttrium as metal ion. This study aims to assess the photocatalytic activity of yttrium-perylenetetracarboxylate (Y-PTC) metal-organic framework (MOF) toward methylene blue and methyl orange under visible light irradiation. The results of the FTIR analysis showed that Y-PTC MOF had a different structure and composition from its precursor (Na4PTC). The Y-PTC MOF has a bandgap energy value of 2.20 eV with a surface area of 47.7487 m2/g. The SEM-EDS analysis showed an elemental composition of yttrium, carbon, and oxygen, were 6.9%, 72.1% and 20.7%, respectively. Furthermore, Y-PTC MOF was able to adsorb dyes at the optimum by 78.10% and 35.57% toward methylene blue (MB) and methyl orange (MO) at the dispersion period of 60 mins. Y-PTC MOF exhibited photocatalytic activity towards the degradation of methylene blue and methyl orange under visible light irradiation. The addition of H2O2 inhibited Y-PTC photocatalytic activity towards MO degradation from 50.89% to 26.38%. In contrast to MO, the addition of H2O2 had a positive effect on MB, which increased the degradation from 87.56% to 91.65%. Therefore, Y-PTC MOF possessed the potential of a photocatalyst material in dyes degradation under visible light irradiation.

A microporous mixed-metal (Na/Cu) mixed-ligand (flexible/rigid) metal–organic framework for photocatalytic H2 generation

2019 ◽  
Vol 7 (33) ◽  
pp. 10211-10217 ◽  
Author(s):  
Dongying Shi ◽  
Chao-Jie Cui ◽  
Min Hu ◽  
A-Hao Ren ◽  
Lu-Bin Song ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
Mixed Ligand ◽  
Light Irradiation ◽  
Mixed Metal ◽  
H2 Generation ◽  
Metal Organic ◽  
Photocatalytic H2 Generation

This work presents a cost-effective mixed-metal mixed-ligand MOF, which exhibits highly efficient photocatalytic H2 generation under visible-light irradiation.

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

2018 ◽  
Vol 47 (27) ◽  
pp. 9103-9113 ◽  
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.

scholarly journals Pyrene-based metal–organic framework NU-1000 photocatalysed atom-transfer radical addition for iodoperfluoroalkylation and (Z)-selective perfluoroalkylation of olefins by visible-light irradiation

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32610-32620 ◽  
Author(s):  
Tiexin Zhang ◽  
Pengfang Wang ◽  
Zirui Gao ◽  
Yang An ◽  
Cheng He ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Metal Organic Framework ◽  
Radical Addition ◽  
Light Irradiation ◽  
Atom Transfer ◽  
Transfer Processes ◽  
Atom Transfer Radical Addition ◽  
Metal Organic

Iodoperfluoroalkylation or (Z)-selective perfluoroalkylation of olefins is mediated through energy transfer processes by using pyrene-based MOF NU-1000 under visible-light irradiation.

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