Boosting peroxymonosulfate activation by a novel bifunctional core-shell nanoreactor MnFe2O4@HZO for nitrilotris-methylenephosphonic acid removal

Pan, Shunlong; Guo, Xinrui; Lu, Xing; Li, Rong; Hu, Hao; Nie, Xi; Liu, Biming; Chen, Rong; Zhu, Mingxin; Hei, Shengqiang; Zhu, Xianzheng; Zhang, Shuo; Zhang, Hua

doi:10.1016/j.apcatb.2023.122508

Cited by 16 publications

(2 citation statements)

References 71 publications

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“…at 577.1 and 587.1 eV) with the relative content of 43.0% and 57.0% . As shown in Figure d, the Mn 2p spectrum exhibited spin–orbit doublets composed of Mn 2p 1/2 and Mn 2p 3/2 , with Mn 2+ (641.0 eV) and Mn 3+ (644.9 eV) being discernible in the deconvolution of Mn 2p 3/2 . In the fitted Fe 2p spectra for CuFeO 2 , the distinct peaks in the Fe 2p B.E.…”

Section: Resultsmentioning

confidence: 86%

“…32 As shown in Figure 2d, the Mn 2p spectrum exhibited spin−orbit doublets composed of Mn 2p 1/2 and Mn 2p 3/2 , with Mn 2+ (641.0 eV) and Mn 3+ (644.9 eV) being discernible in the deconvolution of Mn 2p 3/2 . 33 In the fitted Fe 2p spectra for CuFeO 2 , the distinct peaks in the Fe 2p B.E. at 710.2, 712.2, 718.1, and 725.3 eV were attributed to Fe 2+ 2p 3/2 , Fe 3+ 2p 3/2 , Fe 2+ 2p 1/2 , and Fe 3+ 2p 1/2 , respectively.…”

Section: Resultsmentioning

confidence: 90%

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Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Zhao,

Song,

Zhang

et al. 2023

ACS EST Eng.

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Transition metals (TMs) are excellent active sites to activate peroxymonosulfate (PMS) for water remediation; however, the factors determining the efficiency and selectivity of PMS activation over different TMs remain blurred. Herein, delafossite with different B-site metals (denoted as CuBO 2 , B = Mn, Fe, Co, Cr) was synthesized to activate PMS for Orange I (OI) degradation. Their catalytic activity order followed CuCrO 2 (91.5%) ≈ CuCoO 2 (91.2%) > CuMnO 2 (46.9%) > CuFeO 2 (27.9%); especially the degradation rate (k) of CuCrO 2 (CuCoO 2 ) was 14.0 (12.6)-fold and 30.0 (27.1)-fold higher than that of CuMnO 2 > CuFeO 2 , respectively. Mechanism analysis showed that sulfate radical (SO 4•− ) was the main oxidant responsible for OI degradation in the CuCoO 2 /PMS system, while CuCrO 2 interacted with PMS to execute an electron transfer pathway (ETP) for degrading OI. Experimental and density functional theory calculation results deciphered that the d-band centers of CuCoO 2 (E d = −1.22 eV) and CuCrO 2 (E d = 0.62 eV) were closest to the Fermi level (E F ), thereby facilitating the interfacial electron transfer process and enhancing the PMS activation efficiency. Moreover, it was important to note that the E d value of CuCoO 2 was located below the E F , which led CuCoO 2 to easily lose electrons to PMS, thereby generating sulfate radicals SO 4•− . On the other hand, the E d value of CuCrO 2 was situated above the E F , which facilitated the catalyst to obtain electrons, acting as electron shuttles and driving a nonradical ETP. Finally, the established CuBO 2 -activated PMS systems also exhibited excellent stability and robust resistance against coexisting substances. These findings provided an alternative perspective to understanding the inherent nature of TM-based catalysts for regulating the efficiency and selectivity of PMS activation in water remediation.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 90%

Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Zhao,

Song,

Zhang

et al. 2023

ACS EST Eng.

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Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

He,

Wang,

et al. 2023

Chemistry A European J

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Even though Fe‐based catalysts have been widely employed for CO2 hydrogenation into hydrocarbons, oxygenates, liquid fuels, etc., the precise regulation of their physicochemical properties is needed to enhance the catalytic performance. Herein, under the guidance of the traditional concept in heterogeneous catalysis‐confinement effect, a core‐shell structured catalyst Na−Fe3O4@C is constructed to boost the CO2 hydrogenation performance. Benefiting from the carbon‐chain growth limitation, tailorable H2/CO2 ratio on the catalytic interface, and unique electronic property that all endowed by the confinement effect, the selectivity and space‐time yield of light olefins (C2=−C4=) are as high as 47.4 % and 15.9 g molFe−1 h−1, respectively, which are all notably higher than that from the shell‐less counterpart. The function mechanism of the confinement effect in Fe‐based catalysts are clarified in detail by multiple characterization and density functional theory (DFT). This work may offer a new prospect for the rational design of CO2 hydrogenation catalyst.

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Hollow Nanoreactors Unlock New Possibilities for Persulfate‐Based Advanced Oxidation Processes

Wang,

Zhang

et al. 2024

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As a novel type of catalytic material, hollow nanoreactors are expected to bring new development opportunities in the field of persulfate‐based advanced oxidation processes due to their peculiar void‐confinement, spatial compartmentation, and size‐sieving effects. For such materials, however, further clarification on basic concepts and construction strategies, as well as a discussion of the inherent correlation between structure and catalytic activity are still required. In this context, this review aims to provide a state‐of‐the‐art overview of hollow nanoreactors for activating persulfate. Initially, hollow nanoreactors are classified according to the constituent components of the shell structure and their dimensionality. Subsequently, the different construction strategies of hollow nanoreactors are described in detail, while common synthesis methods for these construction strategies are outlined. Furthermore, the most representative advantages of hollow nanoreactors are summarized, and their intrinsic connections to the nanoreactor structure are elucidated. Finally, the challenges and future prospects of hollow nanoreactors are presented.

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Boosting peroxymonosulfate activation by a novel bifunctional core-shell nanoreactor MnFe2O4@HZO for nitrilotris-methylenephosphonic acid removal

Cited by 16 publications

References 71 publications

Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Hollow Nanoreactors Unlock New Possibilities for Persulfate‐Based Advanced Oxidation Processes

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Boosting peroxymonosulfate activation by a novel bifunctional core-shell nanoreactor MnFe2O4@HZO for nitrilotris-methylenephosphonic acid removal

Cited by 16 publications

References 71 publications

Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Regulating B-Site Metals in Delafossite to Reach Efficient and Selective Peroxymonosulfate Activation for Water Remediation

Tailoring the CO2 Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Hollow Nanoreactors Unlock New Possibilities for Persulfate‐Based Advanced Oxidation Processes

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Product

Resources

About

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell