Nanoscale ZrRGOCuFe layered double hydroxide composites for enhanced photocatalytic degradation of dye contaminant

Kumar, Ome Parkash; Ashiq, Muhammad Naeem; Shah, Syed Shoaib Ahmad; Akhtar, Shahnaz; Obaidi, Mudhar A. Al; Mujtaba, Iqbal M.; Rehman, Aziz ur

doi:10.1016/j.mssp.2021.105748

Cited by 37 publications

(12 citation statements)

References 62 publications

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“…The peaks at 300 and 610 cm −1 were matched to the M 3+ -O-M 2+ and M 3+ -O-M 3+ vibrations in the hydrotalcite structure, in accordance with the FTIR results. [41] The morphology and microstructure of Fe(II)Cu(II)Fe(III)-LDH were further revealed by scanning electron microscope (SEM) and atomic force microscopy (AFM). As observed in Figure 1d,e, the Fe(II)Cu(II)Fe(III)-LDH retained a typical lamellar nanostructure compared with the Cu(II)Fe(III)-LDH (Figure S2, Supporting Information), [42] suggesting the maintenance in the framework of layered double hydroxide after implanting the Fe(II).…”

Section: Resultsmentioning

confidence: 99%

Engineering Reductive Iron on a Layered Double Hydroxide Electrocatalyst for Facilitating Nitrogen Reduction Reaction

Kong

et al. 2022

Adv Materials Inter

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new catalysts to decrease the utilization of noble metal while simultaneously maintaining efficient nitrogen fixation performance becomes an important tendency in this field. [15][16][17][18][19] Chemists have suggested that lowvalence metal species with electron-rich characteristics play an essential role in catalytic process. [20] For instance, Ti (III), [21] Fe (II), [22] Cu (I), [23] Co (II), [24] Mn (III), [25] Ni (I), [26] and Zn (I) [27] act as catalytic centers or impetuses to facilitate the kinetics of multifarious thermodynamically unfavorable processes, including water splitting and nitrogen reduction. Among these low-valence nonprecious 3d transition metals (3d TMs), Fe desires particular attention. [28,29] As one of the cheapest and most abundant metals on the earth, Fe also exists in biological nitrogenases for natural N 2 fixation. [30] The Fe compounds have been widely utilized as catalysts for artificial N 2 fixation in the Haber-Bosch and electrochemical reactions, [31] endowing Fe-based catalysts with immense potential for electrocatalytic NRR under ambient conditions.Recently, layered double hydroxides (LDHs), one kind of 2D nanomaterials, have emerged as promising candidates of NRR electrocatalysts due to their adjustability of morphology, electronic structure, and composition. [32,33] However, the poor conductivity and weak nitrogen activation ability of LDHs handicap their electrocatalytic activities in ammonia synthesis. Numerous research focused on doping a transition metal electrocatalyst by heteroatoms, such as boron, phosphorus, or copper, which could generate defects or adjust electronic structure to improve the NRR activity. [34][35][36] Previous work have also proved that the unsaturated metal sites with electron-rich properties could boost nitrogen absorption, lower the reaction energy barrier, thus leading to an high NH 3 yield as well as FE. [37] According to Lewis acid-base theory, the dinitrogen molecule is a soft base that inclines to react with soft acid. Theoretical and experimental results demonstrated that low-valence 3d TMs could serve as Lewis acid sites. It will be in favor of the adsorption and activation of nitrogen, thereby promoting the catalytic performance. [38,39] Nevertheless, there lacks of attempts on Fe-based LDHs catalysts engineered low-valence metals, inspiring in-depth study.Herein, ferrous iron replacing copper layered double hydroxide (Fe(II)Cu(II)Fe(III)-LDH) was successfully synthesized by a modified solvothermal method. In neutral media, the catalyst reached Ammonia is an indispensable chemical, of which the industrial production is still dominated by Haber-Bosch process operated at harsh conditions. The ecofriendly electrocatalytic N 2 reduction reaction (NRR) emerges as an alternative, however, such technique currently suffers from tough dynamics on account of difficulties in the adsorption or protonation of N 2 on catalysts. To eliminate the obstacle, a simple and valid strategy of ferrous iron replacing copper is proposed to regulate the electron...

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Section: Resultsmentioning

confidence: 99%

Engineering Reductive Iron on a Layered Double Hydroxide Electrocatalyst for Facilitating Nitrogen Reduction Reaction

Kong

et al. 2022

Adv Materials Inter

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“…Figure 13 , displays the general mechanism of photocatalytic degradation of dye over the pristine and modified LDHs. Kumar et al reported a CuF-based LDH which was used as a photo-catalyst for the photo-degradation of methylene blue with 41.56% efficiency [ 188 ]. By doping reduced graphene oxide (RGO) and zirconium (Zr) over the CuF-LDH, the photodegradation efficiency was enhanced to 95.2 and 91.5%, respectively.…”

Section: Photocatalytic Degradation and Its Mechanismsmentioning

confidence: 99%

A Comprehensive Review on Adsorption, Photocatalytic and Chemical Degradation of Dyes and Nitro-Compounds over Different Kinds of Porous and Composite Materials

et al. 2023

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Dye and nitro-compound pollution has become a significant issue worldwide. The adsorption and degradation of dyes and nitro-compounds have recently become important areas of study. Different methods, such as precipitation, flocculation, ultra-filtration, ion exchange, coagulation, and electro-catalytic degradation have been adopted for the adsorption and degradation of these organic pollutants. Apart from these methods, adsorption, photocatalytic degradation, and chemical degradation are considered the most economical and efficient to control water pollution from dyes and nitro-compounds. In this review, different kinds of dyes and nitro-compounds, and their adverse effects on aquatic organisms and human beings, were summarized in depth. This review article covers the comprehensive analysis of the adsorption of dyes over different materials (porous polymer, carbon-based materials, clay-based materials, layer double hydroxides, metal-organic frameworks, and biosorbents). The mechanism and kinetics of dye adsorption were the central parts of this study. The structures of all the materials mentioned above were discussed, along with their main functional groups responsible for dye adsorption. Removal and degradation methods, such as adsorption, photocatalytic degradation, and chemical degradation of dyes and nitro-compounds were also the main aim of this review article, as well as the materials used for such degradation. The mechanisms of photocatalytic and chemical degradation were also explained comprehensively. Different factors responsible for adsorption, photocatalytic degradation, and chemical degradation were also highlighted. Advantages and disadvantages, as well as economic cost, were also discussed briefly. This review will be beneficial for the reader as it covers all aspects of dye adsorption and the degradation of dyes and nitro-compounds. Future aspects and shortcomings were also part of this review article. There are several review articles on all these topics, but such a comprehensive study has not been performed so far in the literature.

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“…A different study also signifies that the defect formation through doping of the Zr element in hybrid RGOCuFe LDH remarkably enhanced the photocatalytic activity of the hybrid composite. 266 It was also suggested that the improvement in the visible light utilization was ascribed to the presence of the oxygen vacancy (V o ) in the LDH lattice, which could act as trapping sites to reduce the recombination of electron-hole pairs.…”

Section: Literature Analysis For Efficient Design Of Hybrid Ldhmentioning

confidence: 99%

Recent developments in layered double hydroxide structures with their role in promoting photocatalytic hydrogen production: A comprehensive review

Sherryna

Tahir

2021

Intl J of Energy Research

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Layered double hydroxides (LDHs) have received scientific attractions due to their unique two-dimensional (2D) structure, band gap tunability, and compositional flexibility, leading to the facile incorporation of the metal species into their layered structure. The main objective of this review is to explore the current advancement of LDH-based photocatalysts for photocatalytic hydrogen production by focusing on the role of divalent and trivalent metal incorporations and their efficiency enhancement. Firstly, the mechanism of photocatalysis and its thermodynamics has been explicated to gain basic understanding and fundamentals. Secondly, a brief introduction to the overview of LDH photocatalysts with special attention to the effects of cationic incorporations on the optical properties and computational study towards the electronic density has been demonstrated. Besides, the thermal stability of LDH is briefly discussed, focusing on the effects of temperature towards the conversion into mixed-metal oxide (MMO). Next, the classification of LDH based on divalent and trivalent cationic elements and their role in the brucite layer of LDH are systematically discussed. Attention is given to the mechanistic properties of the extensively studied metals, such as Mg, Ni, Zn, Co, Cr, Fe, V and Al, with the efficiency enhancements through various engineering aspects are demonstrated. The overview summary on the efficient design of LDH is elucidated to provide a deep understanding for improving their photocatalytic properties. Lastly, the future perspectives and recommendations are discussed to provide new insight into the potential of LDH and render them a notable place in solar energy applications.

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Nanoscale ZrRGOCuFe layered double hydroxide composites for enhanced photocatalytic degradation of dye contaminant

Cited by 37 publications

References 62 publications

Engineering Reductive Iron on a Layered Double Hydroxide Electrocatalyst for Facilitating Nitrogen Reduction Reaction

Engineering Reductive Iron on a Layered Double Hydroxide Electrocatalyst for Facilitating Nitrogen Reduction Reaction

A Comprehensive Review on Adsorption, Photocatalytic and Chemical Degradation of Dyes and Nitro-Compounds over Different Kinds of Porous and Composite Materials

Recent developments in layered double hydroxide structures with their role in promoting photocatalytic hydrogen production: A comprehensive review

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