Toluene oxidation process and proper mechanism over Co3O4 nanotubes: Investigation through in-situ DRIFTS combined with PTR-TOF-MS and quasi in-situ XPS

Zhong, Jinping; Zeng, Yikui; Zhang, Mingyuan; Feng, Wei; Xiao, Diran; Wu, Junliang; Chen, Peirong; Fu, Mingli; Ye, Daiqi

doi:10.1016/j.cej.2020.125375

Cited by 155 publications

(63 citation statements)

References 65 publications

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“…2b. 6,24,25 It should pointed out that the diffraction peak located at 26 can be attributed to the (002) plane of graphitic carbon. For comparison, the structure of ZIF-67 without tannic acid modifying was obtained under similar pyrolysis conditions.…”

Section: Compositional and Structural Characterization Of The Asprepamentioning

confidence: 99%

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

Wang

Zhang

et al. 2020

RSC Adv.

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Section: Compositional and Structural Characterization Of The Asprepamentioning

confidence: 99%

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

Wang

Zhang

et al. 2020

RSC Adv.

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“…When crystal defects in spinel structure break the symmetry in the lattice, location of this peak would shift to lower wave number. [39][40][41] In view of their values, the crystal defects in as-prepared samples decreased from NCO-500 to NCO-700. This may be attributed to that higher calcination temperature leads to higher crystalline and less defects in spinel structure.…”

Section: Resultsmentioning

confidence: 98%

Defect Induced Polarization Loss in Multi‐Shelled Spinel Hollow Spheres for Electromagnetic Wave Absorption Application

2021

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Defect engineering is an effective approach to manipulate electromagnetic (EM) parameters and enhance absorption ability, but defect induced dielectric loss dominant mechanism has not been completely clarified. Here the defect induced dielectric loss dominant mechanism in virtue of multi-shelled spinel hollow sphere for the first time is demonstrated. The unique but identical morphology design as well as suitable composition modulation for serial spinels can exclude the disturbance of EM wave dissipation from dipolar/interfacial polarization and conduction loss. In temperature-regulated defect in NiCo 2 O 4 serial materials, two kinds of defects, defect in spinel structure and oxygen vacancy are detected. Defect in spinel structure played more profound role on determining materials' EM wave dissipation than that of oxygen vacancy. When evaluated serial Co-based materials as absorbers, defect induced polarization loss is responsible for the superior absorption performance of NiCo 2 O 4 -based material due to its more defect sites in spinel structure. It is discovered that electron spin resonance test may be adopted as a novel approach to directly probe EM wave absorption capacities of materials. This work not only provides a strategy to prepare lightweight, efficient EM wave absorber but also illustrates the importance of defect engineering on regulation of materials' dielectric loss capacity.

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“…However, the high-resolution graphs demonstrated minor changes in the elements (Figure 6). For the O1s, the peak of O latt distributed at ≈528-530 eV, the small shift was attributed to the difference of the CeO and CoO bonds; the peak of O ads was located at ≈532.9 eV which was attributed to the hydroxyl species of water adsorbed on surface; [63][64][65] simultaneously, the peak located at 531.3 eV can be assigned to the O vac which referred to the defect site with low oxygen coordination. [66,67] With the introduction of the Co, the content of O vac posed a trend of S3, Supporting Information).…”

Section: Assembly and Characterizationsmentioning

confidence: 99%

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO₂ • Co₃O₄ Nanoflowers for Efficient Degradation of Antibiotics

Zhao¹,

Long

et al. 2021

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Antibiotics discharge has been a critical issue as the abuse in clinical disease treatment and aquaculture industry. Advanced oxidation process (AOPs) is regarded as a promising approach to degrade organic pollutants from wastewater, however, the catalysts for AOPs always present low activities, and uncontrollable porosities, thus hindering their further wider applications. In this work, an aliovalent‐substitution strategy is employed in metal‐organic framework (MOF) precursors assembly, aiming to introduce Co(II/III) into Ce‐O clusters which could modify the structure of the clusters, then change the crystallization, enlarge the surface area, and regulate the morphology. The introduction of Co(II/III) also enlarges the pore size for mass transfer and enriches the active sites for the production of sulfate radicals (SO4• −) in MOF‐derived catalysts, leading to excellent performance in antibiotics removal. Significantly, the CeO2•Co3O4 nanoflowers could efficiently enhance the generation of sulfate radical SO4• − and promote the norfloxacin removal efficiency to 99% within 20 min. The CeO2•Co3O4 nanoflowers also present remarkable universality toward various antibiotics and organic pollutants. The aliovalent‐substitution strategy is anticipated to find wide use in the exploration of high‐performance MOF‐derived catalysts for various applications.

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Toluene oxidation process and proper mechanism over Co3O4 nanotubes: Investigation through in-situ DRIFTS combined with PTR-TOF-MS and quasi in-situ XPS

Cited by 155 publications

References 65 publications

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

Defect Induced Polarization Loss in Multi‐Shelled Spinel Hollow Spheres for Electromagnetic Wave Absorption Application

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO₂ • Co₃O₄ Nanoflowers for Efficient Degradation of Antibiotics

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Toluene oxidation process and proper mechanism over Co3O4 nanotubes: Investigation through in-situ DRIFTS combined with PTR-TOF-MS and quasi in-situ XPS

Cited by 155 publications

References 65 publications

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co3O4/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co3O4/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

Defect Induced Polarization Loss in Multi‐Shelled Spinel Hollow Spheres for Electromagnetic Wave Absorption Application

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO2 • Co3O4 Nanoflowers for Efficient Degradation of Antibiotics

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One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

One-step conversion of tannic acid-modified ZIF-67 into oxygen defect hollow Co₃O₄/nitrogen-doped carbon for efficient electrocatalytic oxygen evolution

Cobalt‐Enhanced Mass Transfer and Catalytic Production of Sulfate Radicals in MOF‐Derived CeO₂ • Co₃O₄ Nanoflowers for Efficient Degradation of Antibiotics