Study on the performance of a MOF-808-based photocatalyst prepared by a microwave-assisted method for the degradation of antibiotics

Wang, Fangwai; Xue, Ruixue; Ma, Yujie; Ge, Yizhao; Wang, Zijun; Qiao, Xiuwen; Zhou, Paiang

doi:10.1039/d1ra05058c

Cited by 34 publications

(12 citation statements)

References 42 publications

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“…Despite the drastically different local coordination motifs of the Zr sites in the four catalysts, only small differences in the electronic state of Zr were detected by XPS (Figure ). The C 1s-corrected Zr 3d 3/2 and 3d 5/2 binding energies (BEs) for MOF-808 were 184.8 and 182.4 eV, respectively, within the range of values (184.8–185.2 and 182.4–182.8 eV) reported in the literature. , These Zr 3d BEs were nearly identical at 185.3(±0.1) and 183.1(±0.1) eV for Zr-Beta and ZrO 2 /SiO 2 , and 185.1 and 182.7 eV for Zr-PhyA, in line with the literature. ,, …”

Section: Resultssupporting

confidence: 71%

Toward a Better Understanding of Intrinsic Activity Trends in Zr-Based Heterogeneous Catalysts for Meerwein–Pondorf–Verley Reduction of Levulinate Esters

et al. 2023

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Lewis acidic heterogeneous catalysts are known to be active for transfer hydrogenation of carbonyl compounds, which occur naturally or can be derived from renewable feedstocks. While previous studies have explored a myriad of Zr-based catalytic systems toward the Meerwein−Pondorf−Verley (MPV) reductions, few have determined intrinsic, site-specific rates under strict kinetic control across a sufficiently wide range of process conditions, causing misconceptions about the true potentials of these catalysts for the targeted transformations. Here, we present a quantitative assessment on the intrinsic activities of four types of Zr catalysts that are purportedly promising candidates for the MPV reductions; the selected catalysts contain active Zr sites within diversified local coordination and secondary solvating environments. A comprehensive kinetic study of ethyl levulinate (EL) MPV reduction in 2-butanol, combined with in situ quantitative titration of the active sites by selective poisoning with alkylphosphonic acid titrants of Lewis acid sites during the reaction, reveals dramatic differences in the relative fraction of active sites (13−78% of total Zr) and turnover rates (>300-fold) among the studied catalysts. Mechanistically, the hydride shift invariably remains as the sole rate-limiting step, regardless of the catalyst; the free energy barriers in both first-order and zero-order kinetic regimes and kinetic isotope effects, however, differ significantly among the catalysts. Through mechanism-based rate equations and transition-state-theory treatments, we further delineate that the wide variations in enthalpic and entropic components not only suggest disparate transition state structures and energetics but also reflect varying adsorption thermodynamics that are influenced by both reactant coordination at and solvent restructuring near the active sites.

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Section: Resultssupporting

confidence: 71%

Toward a Better Understanding of Intrinsic Activity Trends in Zr-Based Heterogeneous Catalysts for Meerwein–Pondorf–Verley Reduction of Levulinate Esters

et al. 2023

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“…By modifying linkers employing functional groups, highly porous structures with remarkable surface areas could be obtained with tuned surface structures [ 67 ]. MOFs were first discovered in the mid-1990′s by Omar Yaghi, and the invention of novel MOFs promised long-lived influence in the areas of chemistry, physics, biology, and the material sciences, particularly used extensively in photocatalysis due to their high surface area, adjustable porosity and pore volume [ 67 , 68 , 69 ]. Thus, MOFs promise to be highly-effective materials for the photocatalytic degradation of antibiotics in a solution [ 66 , 70 ].…”

Section: Common Photocatalytic Materials For Antibiotic Degradationmentioning

confidence: 99%

Photocatalytic Degradation of Some Typical Antibiotics: Recent Advances and Future Outlooks

Bai

Chen

Wang

et al. 2022

IJMS

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The existence of antibiotics in the environment can trigger a number of issues by fostering the widespread development of antimicrobial resistance. Currently, the most popular techniques for removing antibiotic pollutants from water include physical adsorption, flocculation, and chemical oxidation, however, these processes usually leave a significant quantity of chemical reagents and polymer electrolytes in the water, which can lead to difficulty post-treating unmanageable deposits. Furthermore, though cost-effectiveness, efficiency, reaction conditions, and nontoxicity during the degradation of antibiotics are hurdles to overcome, a variety of photocatalysts can be used to degrade pollutant residuals, allowing for a number of potential solutions to these issues. Thus, the urgent need for effective and rapid processes for photocatalytic degradation leads to an increased interest in finding more sustainable catalysts for antibiotic degradation. In this review, we provide an overview of the removal of pharmaceutical antibiotics through photocatalysis, and detail recent progress using different nanostructure-based photocatalysts. We also review the possible sources of antibiotic pollutants released through the ecological chain and the consequences and damages caused by antibiotics in wastewater on the environment and human health. The fundamental dynamic processes of nanomaterials and the degradation mechanisms of antibiotics are then discussed, and recent studies regarding different photocatalytic materials for the degradation of some typical and commonly used antibiotics are comprehensively summarized. Finally, major challenges and future opportunities for the photocatalytic degradation of commonly used antibiotics are highlighted.

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“…41 For MOF-808 and AgI, the value of n was divided into 4 and 1. 42,43 From Fig. 6a and b, the optical band gaps of MOF-808 and AgI were obtained as 4.01 eV and 2.72 eV by calculating the tangent intercept.…”

Section: Optical Performancementioning

confidence: 99%

Facile synthesis of MOF-808/AgI Z-scheme heterojunction with improved photocatalytic performance for the degradation of tetracycline hydrochloride under simulated sunlight

et al. 2022

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Study on the performance of a MOF-808-based photocatalyst prepared by a microwave-assisted method for the degradation of antibiotics

Abstract: In this paper, a simple method was used to rapidly prepare MOF-808 with a large specific surface area and high stability.

Cited by 34 publications

References 42 publications

Toward a Better Understanding of Intrinsic Activity Trends in Zr-Based Heterogeneous Catalysts for Meerwein–Pondorf–Verley Reduction of Levulinate Esters

Toward a Better Understanding of Intrinsic Activity Trends in Zr-Based Heterogeneous Catalysts for Meerwein–Pondorf–Verley Reduction of Levulinate Esters

Photocatalytic Degradation of Some Typical Antibiotics: Recent Advances and Future Outlooks

Facile synthesis of MOF-808/AgI Z-scheme heterojunction with improved photocatalytic performance for the degradation of tetracycline hydrochloride under simulated sunlight

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