Synthesis, characterization, and significant photochemical performances of delafossite AgFeO2 nanoparticles

Ahmed, Jahangeer; Alhokbany, Norah; Husain, Afzal; Ahmad, Tokeer; Khan, M.A. Majeed; Alshehri, Saad M.

doi:10.1007/s10971-020-05274-3

Cited by 28 publications

(5 citation statements)

References 44 publications

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“…The estimated results of these tting can be found the corresponding reports (1.5-2.0 eV) in the literature. 37 Based on this consideration, the estimated optical band gap value is consistent with the order of the fundamental band gap value calculated by DFT, as shown in Table 2, indicating that the optical band gap of AgFeO 2 is affected not only by its crystal phase, but also by its electron spin state. The latter will be discussed in detail in Section 3.4.…”

Section: Physicochemical Properties Of As-prepared Agfeo 2 Samplessupporting

confidence: 77%

Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Dong

Zhao

2022

J. Mater. Chem. A

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Section: Physicochemical Properties Of As-prepared Agfeo 2 Samplessupporting

confidence: 77%

Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Dong

Zhao

2022

J. Mater. Chem. A

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“…Finally, *OH, *O 2 − , 1 O 2 , and h + directly participate the photocatalytic degradation reaction to decompose contaminants, and even mineralized them into CO 2 and H 2 O (Equation ). [ 52–54 ] To sum up, a Z‐scheme was built after Bi 2 O 3 nanoparticles were decorated on the surface of N‐TiO 2 , which could efficiently accelerate the separation and transfer of photogenerated pairs and improve the photocatalytic activity.

\begin{matrix} Photocatalyst + h υ \to {normalh}^{+} + {normale}_{}^{-} \end{matrix}

\begin{matrix} {normale}^{-} + {normalO}_{2} \to_{}^{*} {normalO}_{2}^{-} \end{matrix}

\begin{matrix} _{}^{*} {normalO}_{2}^{-} \to_{}^{1} {normalO}_{2} \end{matrix}

\begin{matrix} {normalh}^{+} + {normalH}_{2} O \to_{}^{*} OH \end{matrix}

\begin{matrix} \begin{matrix} left \\ ^{*} {OH/}^{*} {normalO}_{2}^{-} {normal/}^{1} {normalO}_{2} {/h}^{+} + contaminants \to oxidation products \\ \to {CO}_{2} + {normalH}_{2} O \end{matrix} \end{matrix}

…”

Section: Resultsmentioning

confidence: 99%

“…Finally, *OH, *O 2 − , 1 O 2 , and h + directly participate the photocatalytic degradation reaction to decompose contaminants, and even mineralized them into CO 2 and H 2 O (Equation 5). [52][53][54] To sum up, a Z-scheme was built after Bi 2 O 3 nanoparticles were decorated on the surface of N-TiO 2 , which could efficiently (2)…”

mentioning

confidence: 99%

Feasible Degradation of Polyethylene Terephthalate Fiber‐Based Microplastics in Alkaline Media with Bi₂O₃@N‐TiO₂ Z‐Scheme Photocatalytic System

Zhou

Wang

Zhang

et al. 2022

Advanced Sustainable Systems

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Fiber‐based microplastic (FMP) pollution in the wastewater of the textile industry and urban sewage has become an emerging issue and a potential threat to marine life and human health. However, most reported reduction strategies, such as physical adsorption/filtration and chemical‐catalytic degradation are limited by the secondary pollution caused by the desorption of FMPs and inferior degradation performance. Advanced technologies for efficient FMP control remain largely insufficient and underdeveloped. This work reports a Z‐scheme Bi2O3@N‐TiO2 heterojunction synthesized by a solvothermal and wet‐impregnation strategy. Bi2O3@N‐TiO2 degrades ≈10.23 ± 1.91 wt% of polyethylene terephthalate (PET)‐FMPs (a major FMP existing in the environment) at pH = 9, which is nearly three times higher than that at pH = 7. Experimental results show that the hydrolysis of PET‐FMPs in alkaline media is the main reason for the superior performance. Importantly, the hydrophilic, weight‐average molecular weight and crystallinity of PET‐FMP are the key factors affecting the photocatalytic degradation performance of PET‐FMPs. This study demonstrates an eco‐friendly strategy for remediation of FMP contamination.

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“…At low pressures, two peaks are clearly resolved that correspond to the E g (346 cm −1 ) and A 1g (645 cm −1 ) vibrational modes of 3R− AgFeO 2 . 4,38 The displacement vectors of these two vibrational modes are illustrated in Figure 4. The doubly degenerate E g vibrational mode involves the displacement of oxygen atoms along the a-axis (or b-axis), while the A 1g mode involves the displacement of oxygen atoms along the c-axis.…”

Section: Resultsmentioning

confidence: 99%

High-Pressure Polymorphism in Silver Ferrite Delafossite, AgFeO₂

Manganaro,

Ambos,

DeCapua

et al. 2024

Inorg. Chem.

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The delafossites are a class of layered metal oxides that are notable for being able to exhibit optical transparency alongside an in-plane electrical conductivity, making them promising platforms for the development of transparent conductive oxides. Pressure-induced polymorphism offers a direct method for altering the electrical and optical properties in this class, and although the copper delafossites have been studied extensively under pressure, the silver delafossites remain only partially studied. We report two new high-pressure polymorphs of silver ferrite delafossite, AgFeO2, that are stabilized above ∼6 and ∼14 GPa. In situ X-ray diffraction and vibrational spectroscopy measurements are used to examine the structural changes across the two phase transitions. The high-pressure structure between 6 and 14 GPa is assigned as a monoclinic C2/c structure that is analogous to the high-pressure phase reported for AgGaO2. Nuclear resonant forward scattering reveals no change in the spin state or valence state at the Fe3+ site up to 15.3(5) GPa.

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Synthesis, characterization, and significant photochemical performances of delafossite AgFeO2 nanoparticles

Cited by 28 publications

References 44 publications

Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Feasible Degradation of Polyethylene Terephthalate Fiber‐Based Microplastics in Alkaline Media with Bi₂O₃@N‐TiO₂ Z‐Scheme Photocatalytic System

High-Pressure Polymorphism in Silver Ferrite Delafossite, AgFeO₂

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Synthesis, characterization, and significant photochemical performances of delafossite AgFeO2 nanoparticles

Cited by 28 publications

References 44 publications

Boosting and regulating solar energy conversion performance of delafossite AgFeO2 by spin polarization

Boosting and regulating solar energy conversion performance of delafossite AgFeO2 by spin polarization

Feasible Degradation of Polyethylene Terephthalate Fiber‐Based Microplastics in Alkaline Media with Bi2O3@N‐TiO2 Z‐Scheme Photocatalytic System

High-Pressure Polymorphism in Silver Ferrite Delafossite, AgFeO2

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Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Boosting and regulating solar energy conversion performance of delafossite AgFeO₂ by spin polarization

Feasible Degradation of Polyethylene Terephthalate Fiber‐Based Microplastics in Alkaline Media with Bi₂O₃@N‐TiO₂ Z‐Scheme Photocatalytic System

High-Pressure Polymorphism in Silver Ferrite Delafossite, AgFeO₂