Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

Liu, Xiaolu; Verma, Gaurav; Chen, Zhongshan; Hu, Baowei; Huang, Qifei; Yang, Hui; Ma, Shengqian; Wang, Xiangke

doi:10.1016/j.xinn.2022.100281

Cited by 136 publications

(70 citation statements)

References 187 publications

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“…[3] Therefore, it is an urgent need to efficiently extract uranium from water bodies, which would address both the shortage of uranium resource and environmental pollution. Researchers have also been trying to find strategies for the efficient extraction of uranium from water bodies [4][5][6][7].…”

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confidence: 99%

Insights into Photothermally Enhanced Photocatalytic U(VI) Extraction by a Step-Scheme Heterojunction

et al. 2022

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In this work, a CdS/BiVO4 step-scheme (S-scheme) heterojunction with self-photothermally enhanced photocatalytic effect was synthesized and applied for efficient U(VI) photoextraction. Characterizations such as transient absorption spectroscopy and Tafel test together confirmed the formation of S-scheme heterojunctions, which allows CdS/BiVO4 to avoid photocorrosion while retaining the strong reducing capacity of CdS and the oxidizing capacity of BiVO4. Experimental results such as radical quenching experiments and electron spin resonance show that U(VI) is rapidly oxidized by photoholes/•OH to insoluble UO2(OH)2 after being reduced to U(IV) by photoelectrons/•O2-, which precisely avoids the depletion of electron sacrificial agents. The rapid recombination of electron-hole pairs triggered by the S-scheme heterojunction is found to release large amounts of heat and accelerate the photocatalysis. This work offers a new enhanced strategy for photocatalytic uranium extraction and presents a direction for the design and development of new photocatalysts.

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Section: +mentioning

confidence: 99%

Insights into Photothermally Enhanced Photocatalytic U(VI) Extraction by a Step-Scheme Heterojunction

et al. 2022

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“…Metal–organic framework photocatalysts have a large number of micropores, extremely high specific surface areas and plenty of active surface sites. 222,223 Therefore, combining an IO structure with metal–organic framework photocatalysts is expected to synergistically improve the performance in environmentally-related photocatalysis.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Engineered inverse opal structured semiconductors for solar light-driven environmental catalysis

et al. 2022

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“…Although different kinds of techniques such as (co)precipitation, membrane, adsorption, oxidation-reduction, degradation, ion exchange, transformation etc. have been applied to remove the pollutants from large volume of solutions or in-situ solidification/immobilization on solid phases (Chen et al 2022a;Hao et al 2021;Wang et al 2022;Yu et al 2021aYu et al , 2022, it is still a worldwide challenge for the efficient decontamination of pollutants from solid phases such as soils, sediments etc., especial at low concentrations (Liu et al 2022a). The photocatalytic degradation of POPs or reduction of metal ions is one effective strategy for the in-situ decontamination, to reduce the organic contaminant concentration or immobilize the heavy metal ions on solid particles (Cai et al 2022a;Cheng et al 2021;Li et al 2021b;Yang et al 2021a;Zhang et al 2022a).…”

Section: Introductionmentioning

confidence: 99%

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Cai

Zhang

et al. 2022

Biochar

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The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e−-h+ pairs, to produce more superoxide radicals (·O2−) and hydroxyl radicals (·OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Graphical Abstract

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Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

Cited by 136 publications

References 187 publications

Insights into Photothermally Enhanced Photocatalytic U(VI) Extraction by a Step-Scheme Heterojunction

Insights into Photothermally Enhanced Photocatalytic U(VI) Extraction by a Step-Scheme Heterojunction

Engineered inverse opal structured semiconductors for solar light-driven environmental catalysis

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

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