Two Novel Viologen/Polyoxometalate‐Based Compounds for the Efficient Photocatalytic Reduction of Cr (VI) Under Visible Light Irradiation

Applied Organometallic Chemistry, Journal Year: 2025, Volume and Issue: 39(2)

Published: Jan. 15, 2025

ABSTRACT Designing efficient photocatalyst has attracted extensive attention for treating polluted wastewater containing Cr (VI). In this work, two viologen/polyoxometalate (POM)‐based compounds were synthesized, [Ni (mimb) 2 (H O) 4 (β‐Mo 8 O 26 )]·4H ( 1 ) and [Zn (mimb = 1‐((3,5‐dimethylisoxazol‐4‐yl)methyl)‐[4,4′‐bipyridin]‐1‐ium), through a hydrothermal method investigated their ability of photocatalytic reduction The structures 1–2 characterized by single‐crystal X‐ray diffraction, revealing that both possess zero‐dimensional (0D) structure can form one‐dimensional (1D) chain hydrogen bondings. Photocatalytic experiments demonstrate compound superior performance compared to . Under optimal conditions (pH 2, 15 mg catalysts, 10 L −1 (VI) concentration), completely reduce within 20 min, while requires 30 min. Compounds also show good stability after reaction, maintain high activity five reaction cycles. Additionally, the mechanism was studied, free radical scavenging its main active species are e − , h + ˙O nitroblue tetrazolium (NBT) further confirm crucial role in process. activity, stability, recyclability viologen/POM‐based suggest potential application treatment

Language: Английский

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Dual cross-linked magnetic gelatin/carboxymethyl cellulose cryogels for enhanced Congo red adsorption: Experimental studies and machine learning modelling

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 619 - 635

Published: Sept. 17, 2024

Language: Английский

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A series of four-substituted polyoxometalate-thiacalix[4]arene-based materials for the efficient photocatalytic reduction of Cr(vi)

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(10), P. 3011 - 3020

Published: Jan. 1, 2024

Three isostructural polyoxometalate-thiacalix[4]arene-based materials were employed as efficient photocatalysts for the reduction of Cr( vi ).

Language: Английский

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Adsorption and separation performance of tungsten and molybdenum on modified zirconium based metal organic frameworks UiO-66-CTAB

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113401 - 113401

Published: June 24, 2024

Language: Английский

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Effective adsorptive uptake of hexavalent chromium ions from aqueous systems utilizing a superior activated nanobentonite@cobalt ferrite@carboxymethylcellulose nanocomposite

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 407, P. 125172 - 125172

Published: June 1, 2024

Language: Английский

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Enhanced adsorption of deltamethrin by a SiO2 aerogel/chitosan/humic acid composite using co-precipitation method: Characterization and adsorption mechanism

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 210, P. 118137 - 118137

Published: Jan. 31, 2024

Language: Английский

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Defect-Engineered MOF-801/Sodium Alginate Aerogel Beads for Boosting Adsorption of Pb(II)

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 57614 - 57625

Published: Oct. 8, 2024

Metal–organic frameworks (MOFs) are attractive adsorbents for heavy metal capture due to their superior stability, easy modification, and adjustable pore size. However, inherent microporous structure poses challenges in achieving a higher adsorption capacity. Defect engineering is considered simple method create hierarchical MOFs with larger pores. Here, we employed l-aspartic acid as mixed linker bind Zr4+ clusters competition fumaric of MOF-801 defects, the size was increased from 4.66 15.65 nm. Mercaptosuccinic subsequently used postexchange ligand graft resultant by acid-ammonia condensation further expand 22.73 Notably, −NH2, −COOH, −SH groups contributed these two ligands sites Pb(II). The obtained defective pores thereafter loaded onto sodium alginate form aerogel beads adsorbents, an capacity 375.48 mg/g Pb(II) achieved, which ∼51 times that pristine MOF-801. also exhibited outstanding reusability removal efficiency ∼90.23% after 5 cycles use. mechanism included ion-exchange interaction, well chelation interactions Pb–O, Pb–NH2, Pb–S. versatile combination defect composite provides novel inspirations MOF modification boosting adsorption.

Language: Английский

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Efficient thermal insulation through all-biomass silk fibroin composite aerogel 3D-reinforced by natural down-fiber

Materials Today Physics, Journal Year: 2023, Volume and Issue: 40, P. 101323 - 101323

Published: Dec. 24, 2023

Language: Английский

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Fabrication of photo-responsive chitosan imprinted aerogels for selective adsorption and green desorption of dysprosium ions

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Phosphonic acid-functionalized g-C3N4 nanosheets for chromium (Cr6+) adsorption from aqueous solutions: Experimental insights and density functional theory calculations

Inorganic Chemistry Communications, Journal Year: 2025, Volume and Issue: unknown, P. 113971 - 113971

Published: Jan. 1, 2025

Language: Английский

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