When bimetallic oxides and their complexes meet Fenton-like process

Fu, Wenhong; Yi, Jing; Cheng, Min; Liu, Yang; Zhang, Gaoxia; Li, Ling; Du, Lei; Li, Bo; Wang, Guangfu; Yang, Xiaofeng

doi:10.1016/j.jhazmat.2021.127419

Cited by 104 publications

(25 citation statements)

References 137 publications

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“…Although slight K + leaching was observed (Figure S25), the catalyst showed excellent structural stability and almost identical reactivity after five cyclic runs. Compared to HO· or traditional ferryl species that oxidize pollutants via degradation and mineralization, − our K-FeOCl system provides a new strategy of wastewater treatment despite the need of further exploring the catalytic behavior of K-FeOCl in real and complex water environment. This robust process shows a great potential in applications combined with conventional microfiltration or ultrafiltration (operating pressure <9 bar) to replace the energy intensive nanofiltration (operating pressure >20 bar) for the organic micropollutant removal, potentially reducing the energy consumption by almost 50%. , …”

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confidence: 99%

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway

et al. 2022

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Structural regulation of the active centers is often pivotal in controlling the catalytic functions, especially in iron-based oxidation systems. Here, we discovered a significantly altered catalytic oxidation pathway via a simple cation intercalation into a layered iron oxychloride (FeOCl) scaffold. Upon intercalation of FeOCl with potassium iodide (KI), a new stable phase of K +intercalated FeOCl (K-FeOCl) was formed with slided layers, distorted coordination, and formed high-spin Fe(II) species compared to the pristine FeOCl precursor. This structural manipulation steers the catalytic H 2 O 2 activation from a traditional Fenton-like pathway on FeOCl to a nonradical ferryl (Fe(IV)O) pathway. Consequently, the K-FeOCl catalyst can efficiently remove various organic pollutants with almost 2 orders of magnitude faster reaction kinetics than other Fe-based materials via an oxidative coupling or polymerization pathway. A reaction-filtration coupled process based on K-FeOCl was finally demonstrated and could potentially reduce the energy consumption by almost 50%, holding great promise in sustainable pollutant removal technologies.

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Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway

et al. 2022

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“…Their photogenerated electrons would then react with H 2 O 2 to form • OH radicals (e – + H 2 O 2 → • OH + OH – ) . Meanwhile, the photogenerated holes can be captured by H 2 O to form more • OH (h + + H 2 O → • OH + H + ), which possess a strong capacity to oxidize SMT. − …”

Section: Applications Of Pom@mof Compositesmentioning

confidence: 99%

Polyoxometalate@Metal–Organic Framework Composites as Effective Photocatalysts

et al. 2021

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In the recent years, polyoxometalate (POM) encapsulated metal–organic framework (MOF) composites have attracted much attention in photocatalysis. Both POMs and MOFs have been attracting immense attention in this area. Furthermore, in order to promote charge transfer and separation between POMs and MOFs, theoretical and experimental analysis can be applied to match their energy levels; however, their individual applications are hindered by several defects, such as poor visible-light utilization efficiency. The combination of MOFs and POMs can benefit from the virtues of both POMs and MOFs while avoiding the drawbacks of them. Notably, MOFs with high specific surface area and long-range ordered structure ensure a uniform distribution of POMs, which cannot only prevent the self-aggregation of POMs but also allow the exposure of more active sites for catalysis. POM@MOF composites have been identified as promising materials for photocatalysis because of their diverse unique advantages, such as ultrahigh porosity, large specific surface area, and excellent electron redox transformation. In this work, we present an overview of the developments in POM@MOF composite-based catalysts for visible light induced photocatalysis. The strategies employed for the preparation of POM@MOF composites are summarized and discussed with a particular focus on the stability of such materials. The representative works on photocatalytic water splitting, CO2 reduction, degradation of pollutants, and selective oxidation of organics are highlighted. Special attention is paid to the synergistic effects between the MOF and POM that result in an enhanced performance. Besides, the stability and reusability of these materials are also discussed. Also, the unsolved problems and development opportunities of POM@MOF composites in the field of photocatalysis are proposed.

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“…In addition, POM@MOF composites are effective photocatalysts for the selective oxidation of organic compounds to fine chemicals, such as the conversion of alcohols to aldehydes and sulphides to sulfoxides. [237][238][239] 39). 136 Xu et al have prepared three vanadium substituted (Keggintype PMo 12−n V n O 40 (n = 1-3)) POMOF composites using rho-ZIF by the mechanochemical method (Fig.…”

Section: Pomof Based Photocatalysts In Organic Synthesismentioning

confidence: 99%

“…In addition, POM@MOF composites are effective photocatalysts for the selective oxidation of organic compounds to fine chemicals, such as the conversion of alcohols to aldehydes and sulphides to sulfoxides. 237–239 Shi et al in 2018 prepared Ag based POMOF composite materials via the hydrothermal method, namely (Ag 8 (mttz) 4 (H 2 O)[PW V W VI 11 O 40 ]·H 2 O ( 1 ) and Ag 8 (mttz) 4 (H 2 O)[PMo V Mo VI11 O 40 ] ( 2 ), mttz = 5-methylthio-2Htetrazole). They used these hybrid materials for the selective oxidation of cis -cyclooctene to epoxy cyclooctane.…”

Section: Photocatalytic Activities Of Pom–mof Hybrid Catalystsmentioning

confidence: 99%

MOF/POM hybrids as catalysts for organic transformations

2022

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When bimetallic oxides and their complexes meet Fenton-like process

Cited by 104 publications

References 137 publications

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway

Polyoxometalate@Metal–Organic Framework Composites as Effective Photocatalysts

MOF/POM hybrids as catalysts for organic transformations

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When bimetallic oxides and their complexes meet Fenton-like process

Cited by 104 publications

References 137 publications

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H2O2 Activation Pathway

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H2O2 Activation Pathway

Polyoxometalate@Metal–Organic Framework Composites as Effective Photocatalysts

MOF/POM hybrids as catalysts for organic transformations

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Product

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Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H₂O₂ Activation Pathway