Carbon-coated ZnFe2O4 nanoparticles as an efficient, robust and recyclable catalyst for photocatalytic ozonation of organic pollutants

Gao, Yan; Yang, Baoying; Yang, Yang; Ming, Hongbo; Liu, Guodong; Zhang, Jinshui; Hou, Yidong

doi:10.1016/j.jece.2022.107419

Cited by 10 publications

(10 citation statements)

References 49 publications

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“…The high-resolution C 1s spectra of KCTO and KCTO@C-10 are displayed in Figure i. The broad peak can be deconvoluted into three overlapping peaks at 284.5, 285.8, and 287.1 eV, which are ascribed to C–C, C–O, and CO, respectively. , The positions of the C 1s peaks of KCTO and KCTO@C-10 samples are similar because the chemical environments of the coated carbon and amorphous carbons are the same. , However, the C 1s peak area of KCTO@C-10 is significantly larger than that of KCTO, which strongly suggests that the carbon species have been successfully coated on the surface of KCTO.…”

Section: Resultsmentioning

confidence: 99%

Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Jia

Zhang

et al. 2023

ACS Appl. Energy Mater.

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Development of a perovskite-like metal oxide (PLMO) photocatalyst with a visible light response has long been pursued in the field of photocatalysis. Herein, a PLMO KCuTa 3 O 9 (KCTO) photocatalyst with a narrow band gap of 2.68 eV and a suitable energetic position that straddles the water redox potential has been developed. Subsequently, a 3 nm-thick carbon layer was coated uniformly on the surface of KCuTa 3 O 9 (KCTO@C). The optimized KCTO@C-10 photocatalyst exhibits an excellent photocatalytic hydrogen evolution rate under visible light irradiation (λ > 420 nm), which is 2.87 times higher than that of pure KCTO. Systematic investigations reveal that carbon layer coating on the surface of KCTO not only expands visible light absorption but also promotes electron transfer, facilitating photoinduced electron−hole separation. In addition, an unobvious structural change of the KCTO@C-10 photocatalyst after four cycle tests demonstrates its good photochemical stability. This work offers a perspective for exploiting carbon-coated perovskite-like metal oxide photocatalysts to achieve high-efficiency photocatalytic hydrogen evolution.

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Section: Resultsmentioning

confidence: 99%

Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Jia

Zhang

et al. 2023

ACS Appl. Energy Mater.

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“…[30] Additionally, the high energy consumption and cost, requirement for a cooling system, and inconvenience in operation pose challenges associated with the light source used in photocatalysis. [31,32,23] Furthermore, photocatalysis is also influenced by factors like photon absorption and charge separation. [33] In order to address these issues, integrating Fenton technologies with photocatalysis to enhance efficiency and adaptability is a promising research direction.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

Zheng,

Fan,

Cui

et al. 2024

ChemistrySelect

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In this study, an economical ZnFe2O4@BC composite was successfully synthesized using pomelo peel biochar through a simple one‐pot thermal‐calcination roasting method. The combination of biochar and ZnFe2O4 was confirmed by FTIR, XRD, Raman, TEM, and XPS analysis, confirming that the successful insertion of carbon into the oxygen sites of the ZnFe2O4 lattice, forming C−O bonds. The incorporation of biochar resulted in a high specific surface area, providing more active sites for catalytic reactions, enhancing electron transport, effectively separating electron‐hole pairs, increasing light capturing capacity, and restraining the leaching of metals. The Zn vacancy acted as an electron acceptor, promoting electron transfer in the catalyst by reducing the lowest unoccupied orbital position. Additionally, various reaction parameters such as solution pH, iron content, catalyst dosage, and H2O2 volume were investigated to elucidate their effects on the degradation performance. This study proposes a novel method for synthesizing carbon‐coated metal oxide semiconductors, which shows great potential for environmental and energy‐related applications.

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“…In addition to the regulation of morphology and structure, the photocatalytic performance can be further improved by regulation of composition. Carbon coating has been proved to be one of the effective means to improve the separation of photogenerated electron–hole pairs due to the excellent electron conductivity of carbon materials. − Moreover, carbon coating can enhance the activation ability of photocatalysts for organic reactants, especially those containing benzene rings, accelerating the consumption of surface photogenerated electrons or holes, resulting in the further improved separation of photogenerated carriers. − Therefore, it is a feasible strategy to obtain excellent photocatalysts by constructing a three-dimensional hierarchical structure assembled by uniform carbon-coated ultrathin nanosheets. However, implementation of this strategy is still challenging, mainly because it is not easy to realize uniform coating of carbon layer on ultrathin nanosheets, let alone uniform carbon coating of a three-dimensional hierarchical structure. − The carbonization of coordination compound as a sacrificial template has been considered to be a simple and effective approach to achieve uniform carbon coating on semiconductor materials. − Is it possible to use coordination compounds with unique layered structures as precursors to construct three-dimensional hierarchical structures assembled by uniform carbon-coated ultrathin nanosheets?…”

Section: Introductionmentioning

confidence: 99%

Dissociation-Assembly-Carbonization: A Strategy for Constructing Indium Sulfide Photocatalysts with Increased Reactive Sites and Spatial Charge Separation

Zhang,

Zhou,

et al. 2023

ACS Catal.

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Sufficient surface reaction sites and a high separation of photogenerated carriers are two important guarantees for photocatalytic reactions. In this work, using a layered coordination compound In(pydc) 2 as a precursor, through the dissociationassembly-carbonization process, a three-dimensional (3D) complex hierarchical structure assembled by uniform N,O-codoped carbonencapsulated In 2 S 3 ultrathin nanosheets (N,O−C/In 2 S 3 DP) has been obtained. The unique 3D hierarchical structure can expose the surfaceactive sites of ultrathin nanosheets to the greatest extent, which provides enough surface sites for photocatalytic reactions. The coated N,O-codoped carbon layer can not only realize the spatial separation of photogenerated electrons and holes but also promote the activation for organic reactants. In addition, the multielectron codoping of N and O in a carbon layer is conducive to the generation of superoxide radicals (O 2 • − ), which is an important active group in a photocatalytic organic selective oxidation reaction. Thus, N,O−C/In 2 S 3 DP exhibits good catalytic activity for the selective oxidation of sulfides to sulfoxides under the irradiation of various light sources (blue light, green light, and yellow light). This study provides a design and synthesis strategy (dissociation-assembly-carbonization) for constructing a suitable structure with a specific composition as excellent photocatalysts in the future.

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Carbon-coated ZnFe2O4 nanoparticles as an efficient, robust and recyclable catalyst for photocatalytic ozonation of organic pollutants

Cited by 10 publications

References 49 publications

Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

Dissociation-Assembly-Carbonization: A Strategy for Constructing Indium Sulfide Photocatalysts with Increased Reactive Sites and Spatial Charge Separation

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Carbon-coated ZnFe2O4 nanoparticles as an efficient, robust and recyclable catalyst for photocatalytic ozonation of organic pollutants

Cited by 10 publications

References 49 publications

Perovskite-like Oxide KCuTa3O9 Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Perovskite-like Oxide KCuTa3O9 Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Green synthesis of ZnFe2O4@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

Dissociation-Assembly-Carbonization: A Strategy for Constructing Indium Sulfide Photocatalysts with Increased Reactive Sites and Spatial Charge Separation

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Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Perovskite-like Oxide KCuTa₃O₉ Decorated with Ultra-Thin Carbon Layers as a Visible-Light-Response Photocatalyst for Hydrogen Evolution

Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light