Hierarchical hollow spheres composed of ultrathin Fe2O3 nanosheets for lithium storage and photocatalytic water oxidation

Zhu, Jixin; Yin, Zongyou; Yang, Dan; Sun, Tongming; Yu, Hong; Hoster, Harry E.; Hng, Huey Hoon; Zhang, Hua; Yan, Qingyu

doi:10.1039/c2ee24148j

Cited by 417 publications

(286 citation statements)

References 48 publications

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“…The reaction process was facile and efficient, simply involving heating the reactants under reflux in ethylene glycol for 1 h. Yang and colleagues [76][77][78] have also contributed to the synthesis of amorphous hydroxide materials by preparing flower-like spherical nanostructures using a unique electrochemical technique that is simple, green and inexpensive. These spheres and hollow structures are interesting candidates for use in energy storage [94].…”

Section: Science China Materialsmentioning

confidence: 99%

Tailoring the shape of amorphous nanomaterials: recent developments and applications

2015

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Nanoscale amorphous materials are very important member of the non-crystalline solids family and have emerged as a new category of advanced materials. However, morphological control of amorphous nanomaterials is very difficult because of the atomic isotropy of their internal structures. In this review, we introduce some emerging innovative methods to fabricate well-defined, regular-shaped amorphous nanomaterials. We then highlight some examples to evaluate the use of these amorphous materials in electrodes, and their optical response. There is still plenty of room to explore the amorphous world. As researchers continue to advance the scientific tools that underpin the concepts related to "amorphous", additional applications of these materials will emerge. Their controlled synthesis will undoubtedly attain new heights in the discipline of nanomaterials, and allow nanoscale amorphous materials to become more sophisticated, diverse, and mainstream.

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Section: Science China Materialsmentioning

confidence: 99%

Tailoring the shape of amorphous nanomaterials: recent developments and applications

2015

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“…Preparation of heterojunctions of core@TiO2 may induce the transition of the optical response from the UV to visible region, and separate the electrons and the holes into different regions of the catalyst [12,13]. Alpha-iron oxide (α-Fe2O3) is a promising material for catalysis because of its stability, favourable band gap, low cost and abundance [14][15][16]. The combination of TiO2 with Fe2O3 to form a core-shell structured nanocomposite can decrease the recombination rate of photogenerated electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

Two-Step Fabrication of Porous a#945;-Fe2O3@TiO2 core-shell Nanostructures with Enhanced Photocatalytic Activity

Yang¹,

Sun²,

Fu³

et al. 2017

Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)

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Abstract.A new synthetic approach has been developed to prepare α-Fe2O3@TiO2 core-shell nanostructures at ambient conditions (e.g., in water, ≤100 °C). This approach shows a few unique features, including: short reaction time (a few minutes) for forming core-shell nanostructures, no requirement of high temperature calcinations for generating TiO2 (e.g., at 80-100 °C), tunable TiO2 shell thickness, high yield and good reproducibility. The experimental results show that the α-Fe2O3@TiO2 core-shell nanostructures exhibit enhanced photocatalytic activity compared to the pure TiO2 (P25) and pure Fe2O3 in degradation of organic dye molecules with visible light irradiation. This could be attributed to the large surface area of TiO2 nanoparticles for maximum adsorption of dye molecules, and the effective charge separation at the heterojunction of α-Fe2O3 and TiO2. The findings may open a new strategy to synthesize TiO2-based photocatalysts with enhanced efficiency for environmental remediation applications.

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“…With rapid advances in chemical science, there are many nanomaterials available with well-defined sizes, shapes, crystal facets, structures and compositions. [7][8][9][10][11][12][13][14] There have been increasing efforts to design and control the interface chemistry between different types of components. This is because two-phase interfaces could render hybrid junctions with rich redox reactions, which are beneficial for enhancing the catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Clean synthesis of Cu2O@CeO2 core@shell nanocubes with highly active interface

Wang

Liu

et al. 2015

NPG Asia Mater

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The fabrication of multi-component hybrid nanostructures is of vital importance because their two-phase interface could provide a rich environment for redox reactions, which are beneficial for enhancing catalytic performance. Inspired by the above consideration, strongly coupled Cu 2 O@CeO 2 core@shell nanostructures have been successfully prepared via a non-organic and clean aqueous route without using any organic additive. In this process, an auto-catalytic redox reaction occurred on the two-phase interface, followed by a triggered self-assembly process. Additionally, the size, morphology and composition of the as-obtained nanostructures can be tuned well by varying the reaction temperature, as well as the species and the amount of Cu precursors. The catalytic tests for peroxidase-like activity and CO oxidation have been conducted in detail, and the results confirm a strong synergistic effect at the interface sites between the CeO 2 and Cu 2 O components.

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Hierarchical hollow spheres composed of ultrathin Fe2O3 nanosheets for lithium storage and photocatalytic water oxidation

Cited by 417 publications

References 48 publications

Tailoring the shape of amorphous nanomaterials: recent developments and applications

Tailoring the shape of amorphous nanomaterials: recent developments and applications

Two-Step Fabrication of Porous a#945;-Fe2O3@TiO2 core-shell Nanostructures with Enhanced Photocatalytic Activity

Clean synthesis of Cu2O@CeO2 core@shell nanocubes with highly active interface

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