Sustainable development in the removal and photocatalytic reduction of heavy metals in wastewaters using environmentally friendly and health benign Porphyrin-based Metal-Organic frameworks

Harvey, Pierre D.

doi:10.1016/j.seppur.2023.124214

Cited by 11 publications

(4 citation statements)

References 173 publications

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“…This outcome is in line with the absence of accessible anionic species at the surface and inside the pores; thus, the capture of H 2 S is driven by other types of interactions. This argumentation is fully consistent, for example, with the enhanced capture of iodine (I 2 ) by MOFs and COFs (covalent-organic frameworks) when iodide and bromide ions are found inside these porous materials (inducing the formation of stable BrI 2 – and I 3 – species, respectively). In addition, two odd observations were made for the comparison of q max values between the isostructural CPs I and II and between the q max values of CPs V and VIII and their calculated interaction energies.…”

Section: Discussionsupporting

confidence: 69%

“…So the first take-home message arising from this investigation is that one needs to verify the effect of the particle size on q max . The outcome is unsure as the conclusion of a recent review article on the catalytic synthesis of solar fuels by MOFs and COFs indicated that the photoconversion rate is not linearly related to the particle size . In fact, this conclusion is obscured by the large disparity in materials included in this study.…”

Section: Discussionmentioning

confidence: 77%

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Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

Soleymani-Babadi,

Salahshournia,

Beheshti

et al. 2024

ACS Appl. Mater. Interfaces

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Four new coordination polymers (CPs) have been prepared and evaluated for their efficacy in adsorbing hydrogen sulfide. The reactions of the structurally flexible assembling dithione ligand, L, with different silver(I) salts lead to four new metal–organic coordination architectures (CPs I, III, V, and VIII) exhibiting either one- or two-dimensional networks. CP I, 2D-[(Ag2Cl2)L] n , exhibits a linear series of rhomboid (S)2Ag(μ2-Cl)2Ag(S)2 secondary building units (SBUs) where S is one of the thione functions of L, altogether forming a 2D-network. CP III, 2D-[(AgI)L] n , is built upon parallel staircase-shaped 1D-[Ag2(μ3-I)2] n SBUs bridged by S atoms of L that form a 2D-grid. CP V, 2D-[(AgL)(NO3)] n , presents parallel 1D-folded S-shaped [AgL] n + chains linked by strong argentophilic Ag···Ag interactions, forming a 2D-scaffolding. CP VIII, 1D-[(Ag2 L 3)(Cr2O7)] n , shows 1D-zigzag [{Ag(η2-μ2,η-μ,μ-L)}2] n 2n+ chains accompanied by Cr2O7 2– counteranions. The adsorption isotherms of H2S gas by these new CPs were examined and compared to those of related CPs [(Ag2Br2)L] n (II), [(AgCN)4 L] n (IV), [(Ag2 L)(CF3SO3)2] n (VI), and [(Ag2 L)(NO3)(ClO4)] n (VII). Among the tested polymers, the 3D-CP IV featuring cyanide anions exhibits the highest adsorption capacity of the CPs studied in this work. In order to determine the reason for this marked difference, density functional theory (DFT) computations were used. All in all, it turns out that the electrostatic interactions (CN–···H-SH) are significantly stronger than the O–···H-SH ones. This investigation provides a valuable conceptual tool for other designs of CPs and MOFs having the purpose of capturing toxic gases.

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Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 77%

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

Soleymani-Babadi,

Salahshournia,

Beheshti

et al. 2024

ACS Appl. Mater. Interfaces

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“…The form of reactant Cr(VI) in the catalytic system is mainly determined by the acidity of aqueous solution . When pH > 6, Cr(VI) mainly exists in the form of CrO 4 2– while Cr 2 O 7 2– is the main component at pH < 6 . Hence, the reactant is Cr 2 O 7 2– in established MOF-based sonophotocatalysis.…”

Section: Resultsmentioning

confidence: 99%

“…68 When pH > 6, Cr(VI) mainly exists in the form of CrO 4 2− while Cr 2 O 7 2− is the main component at pH < 6. 69 Hence, the reactant is Cr 2 O 7 2− in established MOF-based sonophotocatalysis. After the completion of the reaction, the supernatant was taken, and NaOH was added to it.…”

Section: Photoreduction Of Cr(vi)mentioning

confidence: 99%

Aluminum-Porphyrin Metal–Organic Frameworks for Visible-Light Photocatalytic and Sonophotocatalytic Cr(VI) Reduction

Liu,

Guo

et al. 2023

Inorg. Chem.

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Construction of double cross‐linked networks in calcium alginate/poly‐N‐isopropylacrylamide hydrogel with photothermal responsiveness for absorbing heavy metal ions

Wang,

Zhao,

Wang

et al. 2023

J of Applied Polymer Sci

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Hydrogels have been widely used for adsorbing heavy metal ions in wastewater treatment. Herein, a calcium alginate/poly‐N‐isopropylacrylamide double‐network hydrogel with photothermal responsiveness was prepared for adsorbing heavy metal ions in aqueous solution. The chemical composition, micromorphology, swelling properties, photothermal responsiveness, adsorption properties, and adsorption mechanism of gel microspheres were studied, respectively. The gel microspheres had an interpenetrating three‐dimensional porous structure, and their high porosity morphology and high specific surface area could ensure the adequate exposure of active adsorption sites. The gel microspheres showed excellent selective adsorption of Cr(III), and the theoretical maximum adsorption capacity of 146.16 mg/g was calculated according to the Langmuir model. Besides, its excellent photothermal conversion ability enhanced the resistance to external interference after the adsorption. Our work has provided an innovative approach to solar water purification while optimizing the preparation process.

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Sustainable development in the removal and photocatalytic reduction of heavy metals in wastewaters using environmentally friendly and health benign Porphyrin-based Metal-Organic frameworks

Cited by 11 publications

References 173 publications

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

Aluminum-Porphyrin Metal–Organic Frameworks for Visible-Light Photocatalytic and Sonophotocatalytic Cr(VI) Reduction

Construction of double cross‐linked networks in calcium alginate/poly‐N‐isopropylacrylamide hydrogel with photothermal responsiveness for absorbing heavy metal ions

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