Degradation of azo dyes under visible light with stable MOF based on tetrastyrene imidazole ligand

Zhang, Xiao; Wang, Lu-Jie; Han, Zhen; Meng, Xing; Wang, Haining; Zhou, Ziyan; Su, Zhong‐Min

doi:10.1039/d0dt00415d

Cited by 26 publications

(7 citation statements)

References 33 publications

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“…Thus, according to the literature, ,, the photocatalytic reaction mechanism is proposed as follows: The electrons of catalysts are excited from the VB to the CB under visible-light irradiation; meanwhile, the corresponding holes remain in the VB. As mentioned above, E VB values of the CPs 2 , 3 , and 4 are 1.77, 2.50, and 1.61 V (vs NHE), which are positive enough to convert OH – to •OH.…”

Section: Resultsmentioning

confidence: 99%

Construction of Novel Coordination Polymers Based on Pyrazole Carboxylic Acid and Doping for Enhancing the Photocatalytic Property Under Visible Light

Wang

Kou

Qiu

et al. 2022

Crystal Growth & Design

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Visible-light-driven photocatalysis is a promising approach for the degradation of organic pollutants due to its effective utilization of sunlight resources. Therefore, the design and synthesis of novel coordination polymers (CPs) as photocatalysts and the regulation of photocatalytic performance have attracted considerable attention. Herein, we designed and synthesized a light absorption ligand 1-(carboxymethyl)-1H-pyrazole-4-carboxylic acid (H 2 cmpc) and prepared six novel CPs with different 3d transition metal ions, named [Mn 3 (cmpc) Co (2), Ni (3), Co 0.4 Ni 0.6 (4)), and [M(Hcmpc) 2 (H 2 O) 4 ] (M = Co (5), Ni (6)). The H 2 cmpc organic linker has three kinds of coordination bridging modes in the six CPs. CP 1 presents a layered structure with a channel. CPs 2−4 are isostructural and show a onedimensional chain structure. CPs 5 and 6 are isostructural and exhibit a mononuclear structure with six-coordinated metal ions, which are connected into a 3D supramolecular structure constructed through hydrogen bonds. Photocatalytic degradation experiments of CPs 2−4 were conducted, indicating that CPs 2−4 show excellent photocatalytic performance under visible light. Furthermore, Co/Ni codoping can enhance the photocatalytic performance compared with single metal CPs. The photocatalytic degradation mechanisms of CPs 2−4 have been investigated.

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Section: Resultsmentioning

confidence: 99%

Construction of Novel Coordination Polymers Based on Pyrazole Carboxylic Acid and Doping for Enhancing the Photocatalytic Property Under Visible Light

Wang

Kou

Qiu

et al. 2022

Crystal Growth & Design

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“…Compared to the Cd(II)/Zn(II)/Co(II)-based catalysts (0.000 365 min –1 ∼ 0.011 min –1 ), the catalytic rate constant for MO degradation has been accelerated around 10 to 1000 times by Cu(I)-based ZZY-2 and ZZY-3 (Table ). − Even though the catalytic capacities of ZZY-2 and ZZY-3 for MO degradation were weaker than the best-reported Cu(I)-based catalyst (CuTz, 0.17 min –1 ), the advantage for ZZY-2 and ZZY-3 was that no light irradiation was needed (Table ). , This has great practical meaning for sewage treatment, where the degradation of organic dye pollutant could be done by only addition of H 2 O 2 and ZZY-2 or ZZY-3.…”

Section: Resultsmentioning

confidence: 99%

Efficient MO Dye Degradation Catalyst of Cu(I)-Based Coordination Complex from Dissolution–Recrystallization Structural Transformation

Zhang

Sheng

et al. 2020

Crystal Growth & Design

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Methyl orange (MO) is a main organic water pollutants that has been attracted a lot of attention; it can be degraded under photoirradiation in the presence of H 2 O 2 . Herein, we developed two Cu(I)-based coordination complexes (named H 2 (Cu 4 Br 6 )[(Cu 4 Br 3 )(TTTMB) 2 (H 2 O)] 2 (ZZY-2) and (Cu 5 Br 6 )-(Cu 6 Br 9 )[Cu 3 Br(TTTMB) 2 ] (ZZY-3)), which could degrade the MO dye in the presence of H 2 O 2 with or without photoirradiation (TTTMB = 1,3,5tris(1,2,4-triazol-1-ylmethyl)-2,4,6-trimethylbenzene). Three-dimensional (3D) frameworks ZZY-2 and ZZY-3 were based on the molecule cage [Cu 3 (TTTMB) 2 ] with the homochiral (−Cu−Br−Cu−) n triple-stranded helical chain and multinuclear Cu 5 Br 6 and Cu 6 Br 9 units, respectively, which could be obtained via the dissolution−recrystallization structural transformation (DRST) from two-dimensional (2D) network ZZY-1 ([Cu 3 (TTTMB) 2 (H 2 O) 6 Cl 6 ]•2H 2 O). The addition of CuBr 2 and the amount of HCOOH were decisive for the DRST, where the formation of a Cu−N coordination bond between the free 2-positional nitrogen atom and Cu(II) was the initiator for DRST. ZZY-2 and ZZY-3 had superior chemical stability, which could maintain the structures after three cycles of degradation reactions. MO degradation catalyzed by ZZY-2 and ZZY-3 could undergo a Fenton-like reaction to produce the active species •OH in the presence of H 2 O 2 . No requirement of photoirradiation for ZZY-2 and ZZY-3 to degrade MO provided more practical meaning to sewage treatment. Cu(II)-based ZZY-4 was also obtained as ZZY-1 in the presence of HNO 3 , which demonstrated the influence of acid on the structure of nitrogen-based ligands. ZZY-4 has shown no capacity to degrade MO, which indicated that the oxidation of Cu(I) by H 2 O 2 could be the key step to initiate the MO degradation.

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“…Metal-organic frameworks (MOFs) are crystalline materials whose diverse structures, large surface areas and tunable pore sizes attract considerable attention [ 5 , 6 ]. Because of their remarkable properties, MOFs have been used in diverse fields, including gas storage and separation [ 7 ], batteries [ 8 ], SCs [ 9 , 10 ], catalysis [ 11 , 12 ], water treatment [ 13 , 14 ] and desalination [ 15 , 16 ]. Earlier research in this field has mainly focused on the preparation, characterization and application of bulk MOFs, and has shown considerable influence of their chemical composition, size and morphology on their functionality and utility [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Dual-ligand and hard-soft-acid-base strategies to optimize metal-organic framework nanocrystals for stable electrochemical cycling performance

Zheng

Sun

Xue

et al. 2021

National Science Review

252

106

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Most metal-organic frameworks (MOFs) suffer from insufficient stability, which limits the scope of their applications. Thus, the design and synthesis of stable size/morphology-controlled MOF nanocrystals is critical but challenging. In this study, dual-ligand and hard-soft-acid-base strategies were used to fabricate a variety of 3D pillared-layer [Ni(thiophene-2,5-dicarboxylate)(4,4’-bipyridine)]n MOF nanocrystals (1D nanofibers, 2D nanosheets, and 3D aggregates) with controllable morphology by varying the concentration of 4,4’-bipyridine and thus controling the crystal growth direction. Owing to the shorter ion diffusion length, enhanced electron/ion transfer, and strong interactions between thiophene-2,5-dicarboxylate and 4,4’-bipyridine, the 2D nanosheets showed much larger specific capacitance than 1D nanofibers and 3D aggregates. A single device with an output voltage as high as 3.0 V and exceptional cycling performance (95% of retention after 5000 cycles at 3 mA cm–2) was realized by configurating two aqueous asymmetric supercapacitor devices in series. The excellent cycling property and charge–discharge mechanism is consistent with the hard-soft-acid-base theory.

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Degradation of azo dyes under visible light with stable MOF based on tetrastyrene imidazole ligand

Abstract: In the present work, a new 3D metal–organic framework (MOF) has been synthesized and characterized.

Cited by 26 publications

References 33 publications

Construction of Novel Coordination Polymers Based on Pyrazole Carboxylic Acid and Doping for Enhancing the Photocatalytic Property Under Visible Light

Construction of Novel Coordination Polymers Based on Pyrazole Carboxylic Acid and Doping for Enhancing the Photocatalytic Property Under Visible Light

Efficient MO Dye Degradation Catalyst of Cu(I)-Based Coordination Complex from Dissolution–Recrystallization Structural Transformation

Dual-ligand and hard-soft-acid-base strategies to optimize metal-organic framework nanocrystals for stable electrochemical cycling performance

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