Synthesis, Characterization, and Photoelectrochemical Catalytic Studies of a Water‐Stable Zinc‐Based Metal–Organic Framework

Altaf, Muhammad; Sohail, Manzar; Mansha, Muhammad; Iqbal, Naseer; Sher, Muhammad; Fazal, Atif; Isab, Anvarhusein A.

doi:10.1002/cssc.201702122

Cited by 22 publications

(9 citation statements)

References 40 publications

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“…The photoinduced electrons in the CB were moved to Pt (counter electrode) to produce H 2 with reduction of water, and holes were utilized for oxidation of water. 63,64 The recycle/reusability tests were performed for three cycles to assess the long-term stability of the photocatalyst (Figure 8A). As seen here, PDA@MOF nanostructures showed excellent reusability/stability for more than 240 min for decolorization of MB under visible LED light irradiation.…”

Section: Methodsmentioning

confidence: 99%

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Çelebi

Aydın

Soysal

et al. 2020

ACS Appl. Nano Mater.

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In this study, bio-inspired polydopamine nanoparticles (PDA NPs) were utilized as a starting template to fabricate a well-defined zirconiumbased MOF (UiO-66, PDA@MOF) core/shell heteronanostructures for visible light-emitting diode (LED) light-assisted photocatalytic applications. The selected PDA substrate provided a multifunctional starting platform for one-pot nucleation growth of metal−organic frameworks (MOF) shell layer with regular spherical morphologies (∼350 nm in size), as well as monodisperse size distribution. The obtained band properties of PDA@MOF (E CB = −1.10 eV and E VB = 1.85 eV vs normal hydrogen electrode (NHE)) revealed that the synthesized nanostructures could promote the reduction of oxygen to superoxide anions (O 2•− ) and the formation of HO • for effective visible LED-light-irradiated photocatalytic degradation of MB. To accelerate the photocatalytic decolorization of MB, an electron acceptor (i.e., H 2 O 2 ) was utilized, which effectively surpassed the electron−hole recombination by trapping electron and producing more hydroxyl radicals. Therefore, a remarkable photocatalytic performance was recorded using PDA@MOF, in which ∼99% of MB was decolorized within 80 min under visible LED light illumination thanks to the well-defined core/shell structure, high surface area, convenient band gap, effective molecular sieving due to the regular/ identifiable morphology, as well as good dispersity in reaction medium. Owing to the advantages of PDA@MOF nanoparticles, the photoelectrochemical (PEC) water splitting performance with highest photocurrent density was obtained as 1.53 mA/cm 2 at low potential 0.28 V vs RHE under visible LED illumination, which is ∼20-fold higher than dark conditions (0.07 mA/cm 2 ). This study mainly highlighted the great potential of MOF-based core/shell nanostructures with uniform/regular morphologies as a next generation of visible-light-responsive catalysts for various environmental applications.

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Section: Methodsmentioning

confidence: 99%

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Çelebi

Aydın

Soysal

et al. 2020

ACS Appl. Nano Mater.

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“…ZnO is an n‐type semiconductor [ 77 ] that is getting a lot of attention due to several outstanding properties such as nontoxicity, [ 78 ] low cost, high thermal conductivity, [ 79 ] and a wide direct bandgap (3.37 eV). [ 80,81 ] The shrinking of such material at the nanoscale modifies the properties of the material itself, changing its electronic structure, the surface‐to‐volume ratio, the density of defects, [ 82 ] and so on, therefore expanding its range of applications.…”

Section: Morphologymentioning

confidence: 99%

Nanoscale ZnO/α‐Fe₂O₃ Heterostructures: Toward Efficient and Low‐Cost Photoanodes for Water Splitting

et al. 2021

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Composite metal oxide semiconductors are promising candidates for photoelectrochemical water splitting (PEC WS) toward environmentally friendly hydrogen production. Among them, ZnO and α‐Fe2O3 hold great potential thanks to a series of benefits, including fast charge transport in single‐crystalline structures, large surface area and tunable shapes (ZnO), and energy bandgap falling in the visible spectral range (α‐Fe2O3). However, both materials present significant drawbacks, which hinder their successful application in high‐efficiency PEC WS: the wide bandgap of ZnO limits its absorption in the UV range, while the low charge carrier mobility results in heavy recombination losses in α‐Fe2O3 during charge collection. The synthesis of ZnO/hematite composites has recently proven to be an effective approach to improve the overall WS performances. In this review, the recent developments on the application of different morphologies (0D, 1D, 2D, and 3D structures) for PEC WS are illustrated, analyzing the role of the shape and morphology in boosting the functional properties, both in single systems and in composite nanostructures. Complex networks show higher photocatalytic efficiency than the single building blocks and, consequently, composite materials exhibit higher performances. Possible paths for the development of an effective lab‐to‐fab transition based on application of ZnO/α‐Fe2O3 composite structures are also suggested.

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“…As a result of the accuracy of MOF construction, scientists have continue to develop applications of MOF compounds and have accomplished many outcomes, but comparatively fewer studies have applied them for corrosion inhibition [28,29]. The MOF structure has large pores; consequently, sequences of composite compounds are fabricated using various groups on graphene oxide to coordinate with the MOF materials with the purpose of obstructing the characteristics of graphene, providing the MOF with corrosion protection ability, thereby inhibiting the impact of corrosion on steel [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

et al. 2022

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In this work, a Zn–benzenetricarboxylic acid (Zn@H3BTC) organic framework coated with a dispersed layer of chitosan (CH/Zn@H3BTC) was synthesized using a solvothermal approach. The synthesized CH/Zn@H3BTC was characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), thermal gravimetric analysis (TGA), and Brunauer, Emmett, and Teller (BET) surface area. The microscopic observation and the analysis of the BET surface area of CH/Zn@H3BTC nanocomposites indicated that chitosan plays an important role in controlling the surface morphology and surface properties of the Zn@H3BTC. The obtained findings showed that the surface area and particle size diameter were in the range of 80 m2 g−1 and 800 nm, respectively. The corrosion protection characteristics of the CH/Zn@H3BTC composite in comparison to pristine chitosan on duplex steel in 2.0 M H2SO4 medium determined by electrochemical (E vs. time, PDP, and EIS) approaches exhibited that the entire charge transfer resistance of the chitosan- and CH/Zn@H3BTC-composite-protected films on the duplex steel substrate was comparatively large, at 252.4 and 364.8 Ω cm2 with protection capacities of 94.1% and 97.8%, respectively, in comparison to the unprotected metal surface (Rp = 20.6 Ω cm2), indicating the films efficiently protected the metal from corrosion. After dipping the uninhabited and protected systems, the surface topographies of the duplex steel were inspected by FESEM. We found the adsorption of the CH/Zn@H3BTC composite on the metal interface obeys the model of the Langmuir isotherm. The CH/Zn@H3BTC composite revealed outstanding adsorption on the metal interface as established by MD simulations and DFT calculations. Consequently, we found that the designed CH/Zn@H3BTC composite shows potential as an applicant inhibitor for steel protection.

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Synthesis, Characterization, and Photoelectrochemical Catalytic Studies of a Water‐Stable Zinc‐Based Metal–Organic Framework

Cited by 22 publications

References 40 publications

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Nanoscale ZnO/α‐Fe₂O₃ Heterostructures: Toward Efficient and Low‐Cost Photoanodes for Water Splitting

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

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Synthesis, Characterization, and Photoelectrochemical Catalytic Studies of a Water‐Stable Zinc‐Based Metal–Organic Framework

Cited by 22 publications

References 40 publications

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Core/Shell PDA@UiO-66 Metal–Organic Framework Nanoparticles for Efficient Visible-Light Photodegradation of Organic Dyes

Nanoscale ZnO/α‐Fe2O3 Heterostructures: Toward Efficient and Low‐Cost Photoanodes for Water Splitting

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

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Nanoscale ZnO/α‐Fe₂O₃ Heterostructures: Toward Efficient and Low‐Cost Photoanodes for Water Splitting