Synergistic influence of Cr3+ and CrO42− on the visible near-infrared spectrum of Mg-Al layered double hydroxides for efficient visible-light photocatalysis

Qing, Xiaolong; Yuan, Le; Wang, Yaqin; Zhang, Zhengtao; Bi, Mei; Weng, Xiaolong

doi:10.1016/j.jallcom.2021.159628

Cited by 17 publications

(8 citation statements)

References 44 publications

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“…More recently, Weng et al reported the double doping of cations and interlayer anions (Cr 3+ and CrO 4 2– ) in MgAl-LDH (Figure a). The synergy of these two dopants resulted in a red-shifted absorption of MgAl-LDH and 57% increase in visible light absorbance …”

Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

“…(a) Preparation pathway for the samples of Cr 3+ and CrO 4 2– -doped MgAl-LDH. Reprinted with permission from Weng et al Copyright 2021 Elsevier B.V. (b) Schematic showing the simultaneous evolution of electron-rich Cu δ+ and OV. (c) ESR spectra for ZnAl-LDH, 0.5%-ZnAl-LDH, and CuZnAl-LDH in the dark.…”

Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

“…The synergy of these two dopants resulted in a red-shifted absorption of MgAl-LDH and 57% increase in visible light absorbance. 61 Our group is committed to developing a Cu doping strategy for LDH materials. Cu doping has several unique properties, such as the electron enrichment effect, which can facilitate the photocatalytic process of LDHs.…”

Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

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Layered Double Hydroxide Engineering for the Photocatalytic Conversion of Inactive Carbon and Nitrogen Molecules

Zhao

Shi

et al. 2022

ACS EST Eng.

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Energy and environmental issues are becoming pressing challenges today, and photocatalysis is receiving increasing attention due to its green and sustainable features in this context. Photocatalytic conversion of inactive carbon and nitrogen molecules aims at producing value-added hydrocarbons and ammonia products using earth-abundant materials with solar energy as the clean energy input. However, photocatalytic materials still suffer from limited light absorption, severe charge carrier recombination, and poor activation for inactive molecules, leading to low reaction rates and uncontrolled selectivity that significantly hinder the spread of their practical application. This article highlights the material engineering of layered double hydroxide (LDH) as one important photocatalyst for activating carbon and nitrogen molecules. We summarize four strategies that have been developed in our recent studies: (1) oxygen vacancy manufacturing, (2) elemental doping, (3) chemical etching, and (4) topological transformation. Furthermore, the activation and selective conversion of CO, CO2, and N2 into multicarbon hydrocarbons and ammonia products over LDH nanomaterials are presented. This perspective intends to provide a reference for the design of LDH-based photo(thermal) catalysts in modulating the reaction activity and product selectivity, thus promoting the development of practical photocatalysis applications.

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Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

Section: Modification Strategies Of Ldh-based Phohocatalystsmentioning

confidence: 99%

See 1 more Smart Citation

Layered Double Hydroxide Engineering for the Photocatalytic Conversion of Inactive Carbon and Nitrogen Molecules

Zhao

Shi

et al. 2022

ACS EST Eng.

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“…A supercell model of hydrotalcite (3x3x2) was used for the density of states calculation, as shown in Fig. 2 [29].…”

Section: Dft Calculation Detailsmentioning

confidence: 99%

Preparation of bimetal modified HMS zeolite and its catalytic effect on phenol degradation

Pang

Gao

Xia

et al. 2022

Preprint

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In this paper, phenol was used as the material to be treated, and HMS molecular sieve was used as the catalyst for the catalytic treatment of the material. HMS, Ti-HMS, Ce-HMS and composite modified Ce/Ti-HMS molecules were used to prepare sieved catalysts. Simulated phenol-containing wastewater with phenol as the main component is treated. The structure of the molecular sieve and its elements and contents were characterized by field emission scanning electron microscope; the morphology of atoms or molecules in the material was characterized by X-ray diffractometer; the chemical bonds in the molecular structure were characterized by Fourier transform infrared spectroscopy. The change of vibration peak was analyzed, and the change of surface and skeleton structure was analyzed; the absorbance of the substance to be tested to visible light was measured by ultraviolet-visible diffuse reflectance method. The experiment was optimized by response surface methodology, and the oxidation of Ce3+ was detected by infrared tracking, and the reaction mechanism of phenol catalytic degradation was analyzed. The active sites that determine the catalytic performance of the composite catalyst were studied by DFT calculations, which further confirmed that the bimetallic modified zeolite has better catalytic effect.

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“…Li et al [8] informed Pt that modified ZnAl-LDH as a photocatalyst that effectively degrades ciprofloxacin. Furthermore, there are other researchers who have attention to modified LDH as a photocatalyst, such as Bi2O3/LDHs doped with Pd(II) for degrading methylene blue [9], CoAl-LDH with Bi2O3 greatly degrades rhodamine B that reached the highest removal 90.36% [10], CrO4 2− to replace interlayer anion on MgAl-LDH was efficiently enhanced photocatalysis performance for degrading methylene blue [11]. Polyoxometalate (POM) is a class of metal-oxygen cluster compounds that have a definite size and shape that make them attractive for application in catalysis and biology [12] and have been proven suitable for catalysis [13].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Malachite Green by NiAl-LDH Intercalated Polyoxometalate Compound

Hanifah

Mohadi

Mardiyanto

et al. 2022

Bull. Chem. React. Eng. Catal.

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Composites based on layered double hydroxide with polyoxometalate K3[-PW12O40] and K4[-SiW12O40] were synthesized to form NiAl-[SiW12O40] and NiAl-[PW12O40]. The materials were characterized by XRD, FTIR, SEM, and UV-DRS and were then applied as a photocatalyst to degrade MG. The effects of catalyst loading, pH value, and contact times on photodegradation performance were carried out in this study. The results indicated that NiAl-LDH was successfully synthesized by showing the peak diffractions at angles 11.63°, 23.13°, and 35.16°. Both kinds of attained NiAl-[SiW12O40] and NiAl-[PW12O40] had typical structures of LDH that were proved by appearing diffraction at 2θ angles 10.76°, 26.59°, 30.8°, and 63.11° for NiAl-[PW12O40] and at 2θ angles 8.26°, 11.34°, 29°, and 35.1° for NiAl-[SiW12O40]. The materials used for the fifth regeneration were characterized by FTIR, which still presents characteristics of LDH structure. The photocatalyst was applied for the first time to degrade MG. The decrease of band gap on NiAl pristine than LDH composite from 4.76 eV to 3.22 eV for NiAl-[SiW12O40] and 3.78 eV for NiAl-[PW12O40] respectively, was presented by DR-UV analysis. LDH composite shows improved degradation photocatalytic performance in comparison with LDH pristine. It was present by the %degradation MG performances were 68.94% for NiAl LDH, 84.51% for NiAl-[PW12O40]), and 88.91% for NiAl-[SiW12O40]. The degradation percentage indicates that the LDH-polyoxometalate composite has succeeded in increasing the ability of photodegradation catalytic and the regeneration ability of LDH pristine. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Synergistic influence of Cr3+ and CrO42− on the visible near-infrared spectrum of Mg-Al layered double hydroxides for efficient visible-light photocatalysis

Cited by 17 publications

References 44 publications

Layered Double Hydroxide Engineering for the Photocatalytic Conversion of Inactive Carbon and Nitrogen Molecules

Layered Double Hydroxide Engineering for the Photocatalytic Conversion of Inactive Carbon and Nitrogen Molecules

Preparation of bimetal modified HMS zeolite and its catalytic effect on phenol degradation

Photocatalytic Degradation of Malachite Green by NiAl-LDH Intercalated Polyoxometalate Compound

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