Thiol decorated defective metal–organic frameworks embedded with palladium nanoparticles for efficient Cr(<scp>vi</scp>) reduction

Pankajakshan, Asha; Ravarikkandy, Aparna; Ratheesh, Balu P.; Maman, Manju P.; Mandal, Sukhendu

doi:10.1039/d1qi00759a

Cited by 10 publications

(12 citation statements)

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“…Synthesis of thiol-functionalized, defective UiO-66 was achieved using a coordination modulation approach. In brief, the synthesis involved using a large excess of the 2-mercapto benzoic acid (2-MBA) modulator along with a benzene dicarboxylic acid (BDC) linker, based on our previous report (Scheme S1, details in the Supporting Information) . Characterization of the synthesized defective MOF was done by PXRD, FTIR, 1 H-NMR, and SEM-EDX analyses.…”

Section: Results and Discussionmentioning

confidence: 99%

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

et al. 2022

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Small-sized silver nanoparticles are incorporated into a thiolfunctionalized stable Zr-based metal−organic framework (MOF). Thiol functionalization has been carried out using 2-mercapto benzoic acid (2-MBA) as the modulator, which promotes defect formation in the MOF structure. The incorporation of silver nanoparticles aided by the silver− sulfur interactions in this defective MOF gives rise to catalytic activity. Its catalytic efficiency in the highly atom-efficient A 3 coupling reaction has been studied for a variety of substrates with impressive recyclability. The synergistic effect of the electron-rich silver core and electron-deficient surface of the thiol-bonded silver nanoparticle is key for this catalytic reaction.

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Section: Results and Discussionmentioning

confidence: 99%

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

et al. 2022

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“…In another work, the Pd NPs were embedded into the UiO-66 frameworks with suspended thiol functional groups coordinated onto the defective sites of the MOF ( reo phase) . In fact, the thiol groups stabilized the NPs and helped their uniform distribution in the MOF.…”

Section: Recent Progress In Mof-based Photocatalystsmentioning

confidence: 99%

“…In another work, the Pd NPs were embedded into the UiO-66 frameworks with suspended thiol functional groups coordinated onto the defective sites of the MOF (reo phase). 139 In fact, the thiol groups stabilized the NPs and helped their uniform distribution in the MOF. The light absorption edge of the UiO-66-SH/Pd, compared to UiO-66, was shifted to the visible-light region because of the presence of thiol groups and Pd NPs.…”

Section: Recent Progress In Mof-based Photocatalystsmentioning

confidence: 99%

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Jafarzadeh

2022

ACS Appl. Mater. Interfaces

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There has been a direct correlation between the rate of industrial development and the spread of pollution on Earth, particularly in the last century. The organic and inorganic pollutants generated from industrial activities have created serious risks to human life and the environment. The concept of sustainability has emerged to tackle the environmental issues in developing chemical-based industries. However, pollutants have continued to be discharged to water resources, and finding appropriate techniques for the removal and remedy of wastewater is in high demand. Chromium is one of the high-risk heavy metals in industrial wastewaters that should be removed via physical adsorption and/or transformed into less hazardous chemicals. Photocatalysis as a sustainable process has received considerable attention as it utilizes sunlight irradiation to remedy Cr(VI) via a cost-effective process. Numerous photocatalytic systems have been developed up to now, but metal–organic frameworks (MOFs) have gained growing attention because of their unique versatilities and facile structural modulations. A variety of MOF-based photocatalysts have been widely employed for the photoreduction of Cr(VI). Here, we review the recent progress in the design of MOF photocatalysts and summarize their performance in photoreduction reactions.

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“…The incorporation of thiol groups into the UiO-66 structure is an impressive strategy to build novel coordination networks . In accordance with the hard–hard interactions, the carboxylates bind with Zr(IV) ions, whereas the thiol functionalities exist as free-standing secondary donor groups.…”

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confidence: 99%

“…In accordance with the hard–hard interactions, the carboxylates bind with Zr(IV) ions, whereas the thiol functionalities exist as free-standing secondary donor groups. These softer thiol moieties can bind with soft metal ions and create catalytic active sites. − The distribution of the thiol group throughout the structure can create a platform for anchoring metal nanoparticles with less order of agglomeration. Also, the microporous structure of UiO-66 aids in the immobilization of monodisperse and narrow size range nanoparticles.…”

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Exploring the Defect Sites in UiO-66 by Decorating Platinum Nanoparticles for an Efficient Hydrogen Evolution Reaction

et al. 2022

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UiO-66 has been tailored using defect engineering methodology to introduce thiol functionalities into the MOF skeletal structure. The thiolated UiO-66 serves as a scaffold to support the platinum nanoparticles with a size of ∼2 nm through a soft−soft interaction. This Pt@UiO-66-SH, utilized as an HER catalyst, exhibited an overpotential of 57 mV at a current density of 10 mA cm −2 in an acidic medium with a Tafel slope of 75 mV/dec and a high TOF value (389.37 s −1 ). This catalyst showed longterm durability for 30 h, specifying the potential of the material to produce neat hydrogen.

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Thiol decorated defective metal–organic frameworks embedded with palladium nanoparticles for efficient Cr(vi) reduction

Abstract: Engineering defective UiO-66 with functionalized modulator may create functionality with promising physical and chemical properties. Herein, we use 2-mercaptobenzoic acid (2-MBA) as a modulator for the functionalization of defective UiO-66...

Cited by 10 publications

References 35 publications

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Exploring the Defect Sites in UiO-66 by Decorating Platinum Nanoparticles for an Efficient Hydrogen Evolution Reaction

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Thiol decorated defective metal–organic frameworks embedded with palladium nanoparticles for efficient Cr(vi) reduction

Abstract: Engineering defective UiO-66 with functionalized modulator may create functionality with promising physical and chemical properties. Herein, we use 2-mercaptobenzoic acid (2-MBA) as a modulator for the functionalization of defective UiO-66...

Cited by 10 publications

References 35 publications

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

Silver Nanoparticle-Incorporated Defect-Engineered Zr-based Metal–Organic Framework for Efficient Multicomponent Catalytic Reactions

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr(VI)

Exploring the Defect Sites in UiO-66 by Decorating Platinum Nanoparticles for an Efficient Hydrogen Evolution Reaction

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Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)