Controlled synthesis of core-shell, yolk-shell and hollow spheres C@La 2 Zr 2 O 7 via the combination of hard templating and co-precipitation method

Sun, Jixian; Feng, Bo; Hu, Shujuan; Qin, Xiaohong; Zhang, Yue

doi:10.1016/j.ceramint.2017.01.104

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…38,39 These results confirm the presence of polydopamine in the precursor. 35–39 After calcination under H 2 /Ar at 550 °C for 7 h, the characteristic peaks at 1628 cm −1 and 1508 cm −1 for PDA disappear completely, as well as those of C–H at 2910 cm −1 and 2852 cm −1 . The intensities of the peaks at 3443 and 1390 cm −1 decrease significantly, indicating that the hydroxyl and carboxylate groups are considerably reduced after calcination.…”

Section: Resultsmentioning

confidence: 99%

“…4c shows the FTIR spectra of Fe 2 O 3 @PDA and Fe/void/C. In the FTIR spectrum of the Fe 2 O 3 @PDA precursor, the broad band centred at ∼3400 cm −1 corresponds to the O–H stretching vibration modes of the hydroxyl or carboxyl groups, 35 and the peaks at 2910 cm −1 and 2852 cm −1 correspond to the aliphatic ν (C–H) stretching modes. 36 Two features at ∼1628 cm −1 and 1508 cm −1 are attributed to the aromatic C bonds of indole and the ring CN, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Rational design of two-dimensional flaky Fe/void/C composites for enhanced microwave absorption properties

Mao

Su-su

et al. 2022

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Rational design of two-dimensional flaky Fe/void/C composites for enhanced microwave absorption properties

Mao

Su-su

et al. 2022

Dalton Trans.

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“…The template method, including hard and soft templates, was commonly applied. Hollow carbon spheres were normally prepared by using a SiO 2 particle or polystyrene as a hard template after deposition of a suitable carbon precursor on the hard template. , The intermediate core–shell structure was first formed, and then transformed, into a hollow carbon sphere after annealing and etching processes. The soft template method provides another route for the preparation of a hollow carbon sphere through the self-assembly of carbon precursors and soft templates such as ionic liquids, sodium dodecyl sulfate, or cetyltrimethylammonium (CTAB), etc. , Unfortunately, this strategy did not work well for controlling the morphology and uniformity of the prepared hollow carbon spheres, limiting its wide application.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Inner Structure of Carbon Spheres via “Protective-Dissolution” Strategy for Supercapacitor

Zhang

Liu

et al. 2019

J. Phys. Chem. C

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Hollow, yolk−shell, and core−shell carbon spheres have attracted substantial attention, because of their unique structure and potential application in energy storage/ conversion. Unfortunately, the structural adjustment of the carbon sphere mostly depends on the template method with a tedious process, and most of the methods are not conductive to large-scale production. Furthermore, one particular structure requires one specific strategy. Here, the carbon spheres with hollow, yolk−shell, and core−shell structure are prepared via a facile and feasible "protective-dissolution" strategy. A suitable amount of acetone is used to dissolve the core of resorcinol-formaldehyde (RF) resin as an effective solvent, and also to regulate the structure as a critical controlling factor. The dissolved resin oligomer assembled outside of the undissolved RF resin sphere under the action of cetyltrimethylammonium (CTAB), forming a strong polymer shell which prevents the RF resin sphere from further dissolution in acetone. The obtained carbon sphere with the especially hollow structure shows a large cavity, high specific surface area, and excellent electrochemical performance with high capacitance of 272 F g −1 at 1 A g −1 , and the capacitance retention is 95.2% after 10 000 charge−discharge cycles at 5 A g −1 . These outstanding properties and remarkable performance make them potential as supercapacitor electrode materials.

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Porous‐Carbon‐Confined Formation of Monodisperse Iron Nanoparticle Yolks toward Versatile Nanoreactors for Metal Extraction

Wang

Luo

Chen

et al. 2018

Chemistry A European J

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All-in-one architectures in which uniform nanoscale zero-valent iron nanoparticles are wrapped in hollow porous carbon shells are highly desirable for environmental applications such as wastewater treatment and for use as catalysts, but their preparation remains a significant challenge. Herein, a spatially confined strategy for the in situ preparation of uniform Fe @mC (mC=micro/mesoporous carbon) yolk-shell nanospheres, in which the iron nanoparticles are encapsulated in thin, porous carbon shells, is reported. The elaborately designed Fe @mC yolk-shell nanospheres were obtained by utilizing silica- and phenolic-resin-coated magnetite nanoparticle core-shell structures as templates by means of selective etching and in situ thermal reduction. The highly dispersed iron nanoparticles with superior reduction capability can effectively remove metal pollutants (e.g., Au , Ag , and Cu ), the carbon shell acts as protective cover and prevents aggregation of iron nanoparticles, and the void space in the capsules serves as a reactor for reduction and catalytic reactions.

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Controlled synthesis of core-shell, yolk-shell and hollow spheres C@La 2 Zr 2 O 7 via the combination of hard templating and co-precipitation method

Cited by 6 publications

References 42 publications

Rational design of two-dimensional flaky Fe/void/C composites for enhanced microwave absorption properties

Rational design of two-dimensional flaky Fe/void/C composites for enhanced microwave absorption properties

Controlling the Inner Structure of Carbon Spheres via “Protective-Dissolution” Strategy for Supercapacitor

Porous‐Carbon‐Confined Formation of Monodisperse Iron Nanoparticle Yolks toward Versatile Nanoreactors for Metal Extraction

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