Facile synthesis of carbon dots-coated CuFe2O4 nanocomposites as a reusable catalyst for highly efficient reduction of organic pollutants

Wang, Jie; Yu, Binglong; Wang, Wenlong; Cai, Xiulan

doi:10.1016/j.catcom.2019.04.012

Cited by 13 publications

(7 citation statements)

References 31 publications

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“…For the O 1s spectrum, the three types of O species were detected at binding energies of 532.20, 529.93 and 530.59 eV in the CFO/C-PNSs (Figure 6c). The peaks at the lower binding energies of 529.93 eV and 532.20 eV are ascribed to the lattice oxygen O 2− from Cu-O and Fe-O linkages [71]. The intermediate binding energy peak was 530.59 eV, which is related to O 2-in the oxygen-deficient regions, confirming the occurrence of oxygen vacancies in the CFO/C-PNSs [72].…”

Section: Evaluation Of Photocatalytic Performancementioning

confidence: 70%

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

et al. 2022

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Hollow transition metal oxides have important applications in the degradation of organic pollutants by a photo-Fenton-like process. Herein, uniform, highly dispersible hollow CuFe2O4/C nanospheres (denoted as CFO/C-PNSs) were prepared by a one-pot approach. Scanning electron microscope (SEM) and transmission electron microscope (TEM) images verified that the CFO/C-PNS catalyst mainly presents hollow nanosphere morphology with a diameter of 250 ± 30 nm. Surprisingly, the photodegradation test results revealed that CFO/C-PNSs had an excellent photocatalytic performance in the elimination of various organic contaminants under visible light through the efficient Fenton catalytic process. Due to the unique hollow structure formed by the assembly of ultra-small CFO/C subunits, the catalyst exposes more reaction sites, improving its photocatalytic activity. More importantly, the resulting magnetically separable CFO/C-PNSs exhibited excellent stability. Finally, the possible photocatalytic reaction mechanism of the CFO/C-PNSs was proposed, which enables us to have a clearer understanding of the photo-Fenton mechanism. Through a series of characterization and analysis of degradation behavior of CFO/C-PNS samples over antibiotic degradation and Cr(VI) reduction, •OH radicals generated from H2O2 decomposition played an essential role in enhancing the reaction efficiency. The present work offered a convenient method to fabricate hollow transition metal oxides, which provided impetus for further development in environmental and energy applications. Highlights: Novel hollow CuFe2O4/C nanospheres were prepared by a facile and cost-effective method. CuFe2O4/C exhibited excellent photo-Fenton-like performance for antibiotic degradation. Outstanding photocatalytic performance was attributed to the specific hollow cavity-porous structure. A possible mechanism for H2O2 activation over hollow CuFe2O4/C nanospheres was detailed and discussed.

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Section: Evaluation Of Photocatalytic Performancementioning

confidence: 70%

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

et al. 2022

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“…The other instances of the core/shell and heterostructures of magnetic and QDs materials were reported somewhere else. 113,114 4.1.5 QDs with coating of Gd-chelates. The next category that will be discussed here is QDs coated of chelates (organic…”

Section: Reviewmentioning

confidence: 99%

“…The other instances of the core/shell and heterostructures of magnetic and QDs materials were reported somewhere else. 113,114 …”

Section: Magneto Fluorescent Quantum Dots (Mfqds) Nanocompositesmentioning

confidence: 99%

Tailor made magnetic nanolights: fabrication to cancer theranostics applications

et al. 2021

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“…CuFe 2 O 4 ‐CDs nanocomposites were fabricated as a reusable catalyst by Wang et al. [32] The influence of CuFe 2 O 4 /CQD nanocomposites on removing organic pollution was investigated and the organic nitroarene (4‐nitrophenol) was removed from water pollution using the catalyst. Arumugam et al.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that CuFe 2 O 4 NPs could remove the methylene blue (MB) and drimarene yellow (DY) dyes and showed their photocatalytic effect in the degradation of pigments. CuFe 2 O 4 -CDs nanocomposites were fabricated as a reusable catalyst by Wang et al [32] The influence of CuFe 2 O 4 /CQD nanocomposites on removing organic pollution was investigated and the organic nitroarene (4-nitrophenol) was removed from water pollution using the catalyst. Arumugam et al [33] conducted a study to reduce various dyes (methylene blue (MB) and Allura red (AR)) along with nitroarene compounds (2-nitroaniline, 3-nitroaniline, 4-nitroaniline, and 4-nitro-2-phenylenediamine (4-NPDA) with a synthesized TCPIL/CuFe 2 O 4 /BNONS nanomaterial as a nanocatalyst.…”

Section: Introductionmentioning

confidence: 99%

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium

2022

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The primary objective of this research is to investigate the reduction of 4‐nitroaniline (4‐NA) and 2‐nitroaniline (2‐NA) using synthesized copper ferrite nanoparticles (NPs) via facile one‐step hydrothermal method as a heterogeneous nano‐catalyst. Nitroanilines were reduced in the presence and without the catalyst with a constant amount (100 mg) of reducing agent of sodium borohydride (NaBH 4 ) at room temperature in water to amino compounds. To characterize the functional groups, size, structure, and morphology of as‐prepared magnetic NPs, FTIR, XRD, SEM, and TEM were employed. The UV‐Vis spectrum was utilized to explore the catalytic effect of CuFe 2 O 4 . The outcomes revealed that the synthesized CuFe 2 O 4 as a heterogeneous magnetic nano‐catalyst catalyzed the reduction of 4‐NA and 2‐NA significantly faster than other candidate catalysts. The outcomes demonstrated that the catalyst catalyzed 4‐nitroaniline to para ‐phenylenediamine ( p ‐PDA) and 2‐nitroaniline to ortho ‐phenylenediamine (o‐PDA) with a constant rate of 7.49×10 −2 s −1 and 3.19×10 −2 s −1 , and conversion percentage of 96.5 and 95.6, in 40 s and 90 s, sequentially. Furthermore, the nanoparticles could be recovered by a magnetic separation method and reused for six consecutive cycles without remarkable loss of catalytic ability.

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Facile synthesis of carbon dots-coated CuFe2O4 nanocomposites as a reusable catalyst for highly efficient reduction of organic pollutants

Cited by 13 publications

References 31 publications

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

Tailor made magnetic nanolights: fabrication to cancer theranostics applications

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium

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Facile synthesis of carbon dots-coated CuFe2O4 nanocomposites as a reusable catalyst for highly efficient reduction of organic pollutants

Cited by 13 publications

References 31 publications

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

Hollow Nanospheres Organized by Ultra-Small CuFe2O4/C Subunits with Efficient Photo-Fenton-like Performance for Antibiotic Degradation and Cr(VI) Reduction

Tailor made magnetic nanolights: fabrication to cancer theranostics applications

The Catalytic Reduction of Nitroanilines Using Synthesized CuFe2O4 Nanoparticles in an Aqueous Medium

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The Catalytic Reduction of Nitroanilines Using Synthesized CuFe₂O₄ Nanoparticles in an Aqueous Medium